Lincoln Navigator Manuals

Lincoln Navigator: Exterior Trim and Ornamentation / Power Running Board (PRB). Diagnosis and Testing

Lincoln Navigator 2018-2025 Workshop Manual / Body and Paint / Exterior Trim and Ornamentation / Power Running Board (PRB). Diagnosis and Testing

DTC Chart: Running Board Control Module (RBM)

Diagnostics in this manual assume a certain skill level and knowledge of Ford-specific diagnostic practices.
REFER to: Diagnostic Methods (100-00 General Information, Description and Operation).


  RBM DTC Chart


DTC Description Action
C1002:77 Left Power Running Board Stow: Commanded Position Not Reachable Perform complete Power Running Board Cleaning And Maintenance as indicated in GSB 18-7081. TEST the system for normal operation. If the concern returns, REPLACE the LH PRB motor.
REFER to: Power Running Board (PRB) Motor (501-08 Exterior Trim and Ornamentation, Removal and Installation).
C1003:77 Right Power Running Board Stow: Commanded Position Not Reachable Perform complete Power Running Board Cleaning And Maintenance as indicated in GSB 18-7081. TEST the system for normal operation. If the concern returns, REPLACE the RH PRB motor.
REFER to: Power Running Board (PRB) Motor (501-08 Exterior Trim and Ornamentation, Removal and Installation).
C1004:77 Right Power Running Board Deploy: Commanded Position Not Reachable Perform complete Power Running Board Cleaning And Maintenance as indicated in GSB 18-7081. TEST the system for normal operation. If the concern returns, REPLACE the RH PRB motor.
REFER to: Power Running Board (PRB) Motor (501-08 Exterior Trim and Ornamentation, Removal and Installation).
C1005:77 Left Power Running Board Deploy: Commanded Position Not Reachable Perform complete Power Running Board Cleaning And Maintenance as indicated in GSB 18-7081. TEST the system for normal operation. If the concern returns, REPLACE the LH PRB motor.
REFER to: Power Running Board (PRB) Motor (501-08 Exterior Trim and Ornamentation, Removal and Installation).
C1006:11 Left Power Running Board Motor: Circuit Short To Ground   GO to Pinpoint Test D
C1006:12 Left Power Running Board Motor: Circuit Short To Battery   GO to Pinpoint Test D
C1006:13 Left Power Running Board Motor: Circuit Open   GO to Pinpoint Test D
C1006:19 Left Power Running Board Motor: Circuit Current Above Threshold   GO to Pinpoint Test D
C1007:11 Right Power Running Board Motor: Circuit Short To Ground   GO to Pinpoint Test E
C1007:12 Right Power Running Board Motor: Circuit Short To Battery   GO to Pinpoint Test E
C1007:13 Right Power Running Board Motor: Circuit Open   GO to Pinpoint Test E
C1007:19 Right Power Running Board Motor: Circuit Current Above Threshold   GO to Pinpoint Test E
C1008:3A Left Power Running Board Position/Motion Sensor: Signal Has Too Many Pulses Internal PRB motor damage. INSTALL a new LH PRB motor.
REFER to: Power Running Board (PRB) Motor (501-08 Exterior Trim and Ornamentation, Removal and Installation).
C1008:93 Left Power Running Board Position/Motion Sensor: No Operation   GO to Pinpoint Test F
C1009:3A Right Power Running Board Position/Motion Sensor: Signal Has Too Many Pulses Internal PRB motor damage. INSTALL a new RH PRB motor.
REFER to: Power Running Board (PRB) Motor (501-08 Exterior Trim and Ornamentation, Removal and Installation).
C1009:93 Right Power Running Board Position/Motion Sensor: No Operation   GO to Pinpoint Test F
C1B14:11 Sensor Supply Voltage A: Circuit Short To Ground   GO to Pinpoint Test F
C1B14:12 Sensor Supply Voltage A: Circuit Short To Battery   GO to Pinpoint Test F
U0140:00 Lost Communication With BCM : No Sub Type Information   GO to Pinpoint Test J
U0146:00 Lost Communication with Gateway "A": No Sub Type Information   GO to Pinpoint Test G
U0422:00 Invalid Data Received From BCM : No Sub Type Information
  • This DTC sets if the ignition signal status message is invalid for 5 seconds. Using a diagnostic scan tool, RETRIEVE and DIAGNOSE all BCM DTC .
    REFER to: Body Control Module (BCM) (419-10 Multifunction Electronic Modules) .
  • If no Diagnostic Trouble Codes (DTCs) are present in the BCM, the condition may be caused by an intermittent concern. SET the ignition to OFF. DISCONNECT and INSPECT all BCM electrical connectors and related in-line connectors for corrosion, bent pins, pushed-out pins and spread terminals. REPAIR as necessary.
U1000:00 Solid State Driver Protection Active: Driver Disabled: No Sub Type Information   GO to Pinpoint Test K
U3000:09 Control Module: Component Failure
  • CLEAR the Diagnostic Trouble Codes (DTCs). CARRY OUT the RBM self-test. RETRIEVE and RECORD all Diagnostic Trouble Codes (DTCs).
  • If the DTC returns, INSTALL a new RBM .
    REFER to: Running Board Control Module (RBM) (501-08 Exterior Trim and Ornamentation, Removal and Installation).
U3000:41 Control Module: General Checksum Failure
  • CLEAR the Diagnostic Trouble Codes (DTCs). CARRY OUT the RBM self-test. RETRIEVE and RECORD all Diagnostic Trouble Codes (DTCs).
  • If the DTC returns, INSTALL a new RBM .
    REFER to: Running Board Control Module (RBM) (501-08 Exterior Trim and Ornamentation, Removal and Installation).
U3000:49 Control Module: Internal Electronic Failure
  • CLEAR the Diagnostic Trouble Codes (DTCs). CARRY OUT the RBM self-test. RETRIEVE and RECORD all Diagnostic Trouble Codes (DTCs).
  • If the DTC returns, INSTALL a new RBM .
    REFER to: Running Board Control Module (RBM) (501-08 Exterior Trim and Ornamentation, Removal and Installation).
U3000:4B Control Module: Over Temperature
  • CLEAR the Diagnostic Trouble Codes (DTCs). CARRY OUT the RBM self-test. RETRIEVE and RECORD all Diagnostic Trouble Codes (DTCs).
  • If the DTC returns, INSTALL a new RBM .
    REFER to: Running Board Control Module (RBM) (501-08 Exterior Trim and Ornamentation, Removal and Installation).
U3003:16 Control Module: Circuit Voltage Below Threshold   GO to Pinpoint Test H
U3003:17 Control Module: Circuit Voltage Above Threshold   GO to Pinpoint Test I

Symptom Chart

Diagnostics in this manual assume a certain skill level and knowledge of Ford-specific diagnostic practices.
REFER to: Diagnostic Methods (100-00 General Information, Description and Operation).


  Symptom Chart: RBM


Condition Possible Sources Actions
The PRB Does Not Operate Correctly - Both Refer to the Pinpoint Test   GO to Pinpoint Test A
The PRB Does Not Operate Correctly - RH Side Does Not Deploy/Stow, or Reverses Direction Refer to the Pinpoint Test   GO to Pinpoint Test B
The PRB Does Not Operate Correctly - LH Side Does Not Deploy/Stow, or Reverses Direction Refer to the Pinpoint Test   GO to Pinpoint Test C

Pinpoint Tests

The PRB Does Not Operate Correctly - Both


Refer to Wiring Diagrams Cell 109 for schematic and connector information.

NOTE: The RBM will stop functionality when battery voltage drops below 10.5 volts. The PRB system will recover at the next door ajar transition provided that the battery voltage remains above 10.5 volts.

Normal Operation and Fault Conditions

The RBM receives battery voltage from BJB fuse F89 (30A) and ground at G200. The LH and RH Hall-effect sensors (Integral to the PRB motors) receive a regulated 5 volt power supply, and ground from the RBM . The RBM monitors each motor movement using the Hall-effect sensor signal from the respective motor. The RBM receives door ajar status for each door and vehicle speed status over the MS-CAN . Door ajar signals trigger the RBM to deploy or stow the respective RH or LH PRB .

Possible Causes

  • Wiring, terminals or connectors
  • Door ajar signal concern
  • Vehicle speed signal concern
  • Foreign material causing blockage of PRB movement
  • PRB motor
  • RBM

Visual Inspection and Diagnostic Pre-checks

  • BJB fuse F89 (30A).
  • Foreign material causing blockage of PRB movement

PINPOINT TEST A: THE PRB (POWER RUNNING BOARD) DOES NOT OPERATE CORRECTLY - BOTH
A1 CHECK FOR THE RBM (RUNNING BOARD CONTROL MODULE) FOR DIAGNOSTIC TROUBLE CODES (DTCS)
  • Using a diagnostic scan tool, retrieve all Continuous Memory Diagnostic Trouble Codes (CMDTCs) for the RBM .

Are any Diagnostic Trouble Codes (DTCs) present?
Yes REPAIR the DTC concern.
No GO to A2

A2 CHECK FOR DOOR AJAR AND VEHICLE SPEED DIAGNOSTIC TROUBLE CODES (DTCS) IN ALL MODULES
  • Using a diagnostic scan tool, retrieve all Continuous Memory Diagnostic Trouble Codes (CMDTCs) for all modules.

Are any door ajar switch or vehicle speed related Diagnostic Trouble Codes (DTCs) present in other modules?
Yes DIAGNOSE the door ajar switch or vehicle speed concern.
REFER to: Body Control Module (BCM) (419-10 Multifunction Electronic Modules) .
No GO to A3

A3 CHECK THE OPERATION OF THE POWER RUNNING BOARDS — AUTOMATIC MODE

NOTE: When a door is closed, a short delay is normal before the PRB retracts. This delay feature is to reduce excessive PRB cycling if a door is closed and another door on the same side is then opened (for example if a passenger is moving from the front seat to the rear seat).

  • Set the PRB system to the AUTO (enabled) mode.
  • Open and close the LH front door allowing time for the PRB to react. The LH PRB should deploy when the door is open, and retract when the door is closed.
  • Open and close the LH rear door. The LH PRB should deploy when the door is open, and retract when the door is closed.
  • Open and close the RH front door. The RH PRB should deploy when the door is open, and retract when the door is closed.
  • Open and close the RH rear door. The RH PRB should deploy when the door is open, and retract when the door is closed.

Do both Power Running Boards (PRBs) operate correctly?
Yes GO to A4
No GO to A5

A4 CHECK THE OPERATION OF THE POWER RUNNING BOARDS — MANUAL MODE
  • Set the PRB system to the OUT mode. Both Power Running Boards (PRBs) should deploy.

Do both Power Running Boards (PRBs) deploy?
Yes The system is operating as designed. REVIEW operation of the PRB system with the customer.
No GO to A5

A5 CHECK THE POWER RUNNING BOARDS FOR FOREIGN MATERIAL
  • Check the step area and door sill of both Power Running Boards (PRBs) for foreign material or blockage.
  • Check all of the PRB hinge points for any corrosion that may cause binding.
  • Perform complete Power Running Board Cleaning And Maintenance as indicated in GSB 18-7081.

Does the system now work?
Yes SET the PRB system to the OUT mode and REMOVE the foreign material or corrosion. If necessary, a power washer can be used; however, avoid direct spray to the PRB motors. TEST the system for normal operation. REFER the customer to the Owner's Literature for correct cleaning instructions.
No GO to A6

A6 CHECK THE RBM (RUNNING BOARD CONTROL MODULE) GROUND CIRCUIT FOR AN OPEN
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C3313B-4   Ground

Is the resistance less than 3 ohms?
Yes GO to A7
No REPAIR the circuit.

A7 CHECK THE RBM (RUNNING BOARD CONTROL MODULE) VBATT CIRCUIT FOR VOLTAGE
  • Measure and record the voltage at the battery.
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C3313B-1   Ground

Is the voltage within 0.2 volts of the recorded battery voltage?
Yes GO to A8
No VERIFY BCM fuse F89 (40A) is OK. If OK, REPAIR the circuit for high resistance or an open. If not OK, REFER to the Wiring Diagrams manual to identify the cause of the circuit short.

A8 CHECK FOR CORRECT RBM (RUNNING BOARD CONTROL MODULE) OPERATION
  • Ignition OFF.
  • Disconnect All PRB system and related in-line connectors.
  • Check for:
    • corrosion – install new connector or terminals and clean module pins
    • damaged or bent pins – install new terminals or pins
    • pushed-out pins – install new pins as necessary
  • Connect all PRB system and related in-line connectors and make sure they seat correctly.
  • Operate the system and verify the concern is still present.

Is the concern still present?
Yes CHECK OASIS for any applicable Technical Service Bulletins (TSBs). If a TSB exists for this concern, DISCONTINUE this test and FOLLOW TSB instructions. If no Technical Service Bulletins (TSBs) address this concern, INSTALL a new RBM .
REFER to: Running Board Control Module (RBM) (501-08 Exterior Trim and Ornamentation, Removal and Installation).
No The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.


The PRB Does Not Operate Correctly - RH Side Does Not Deploy/Stow, or Reverses Direction


Refer to Wiring Diagrams Cell 109 for schematic and connector information.

Normal Operation and Fault Conditions

The RH Hall-effect sensors (Integral to the PRB motor) receives a regulated 5 volt power supply, and ground from the RBM . The RBM monitors PRB motor movement using the Hall-effect sensor signal from PRB motor. The RBM receives door ajar status of each door over the MS-CAN . Door ajar signals trigger the RBM to deploy or stow the RH PRB .

Possible Causes

  • Wiring, terminals or connectors
  • Door ajar signal concern
  • Message center concern
  • Foreign material causing blockage of PRB movement
  • RH PRB motor
  • RBM

Visual Inspection and Diagnostic Pre-checks

  • Foreign material causing blockage of PRB movement

PINPOINT TEST B: THE RH (RIGHT-HAND) PRB (POWER RUNNING BOARD) DOES NOT OPERATE CORRECTLY - DOES NOT DEPLOY/STOW OR REVERSES DIRECTION
B1 CHECK FOR RBM (RUNNING BOARD CONTROL MODULE) DIAGNOSTIC TROUBLE CODES (DTCS)
  • Using a diagnostic scan tool, retrieve all Diagnostic Trouble Codes (DTCs) for the RBM .

Are any Diagnostic Trouble Codes (DTCs) present?
Yes REPAIR the DTC concern.
No GO to B2

B2 CHECK THE OPERATION OF THE POWER RUNNING BOARDS — AUTOMATIC MODE

NOTE: When a door is closed, a short delay is normal before the PRB retracts. This delay feature is to reduce excessive PRB cycling if a door is closed and another door on the same side is then opened (for example if a passenger is moving from the front seat to the rear seat).

  • Set the PRB system to the AUTO (enabled) mode.
  • Open and close the RH front door. The RH PRB should deploy when the door is open, and retract when the door is closed.
  • Open and close the RH rear door. The RH PRB should deploy when the door is open, and retract when the door is closed.

Does the RH PRB operate correctly?
Yes GO to B3
No GO to B4

B3 CHECK THE OPERATION OF THE POWER RUNNING BOARDS — MANUAL MODE
  • Set the PRB system to the OUT mode. Both Power Running Boards (PRBs) should deploy.

Do both Power Running Boards (PRBs) deploy?
Yes The system is operating as designed. REFER the customer to the Owner's Literature for correct PRB system operation.
No GO to B4

B4 CHECK THE POWER RUNNING BOARDS FOR FOREIGN MATERIAL
  • Check the step area and door sill of the RH PRB for foreign material or blockage.
  • Check the RH PRB hinge points for any corrosion that may cause binding.
  • Perform complete Power Running Board Cleaning And Maintenance as indicated in GSB 18-7081.

Does the Right Board now deploy with door open in “AUTO”?
Yes SET the PRB system to the OUT mode and REMOVE the foreign material or corrosion. If necessary, a power washer can be used; however, avoid direct spray to the PRB motor. TEST the system for normal operation. REFER the customer to the Owner's Literature for correct cleaning instructions.
No GO to B5

B5 CHECK THE DOOR AJAR SWITCH OPERATION
  • Ignition ON.
  • Open and close the RH front and rear door, and verify the interior lights operate correctly and a door ajar message is noted on the vehicle message center. The interior lights should turn on when the door is opened and off when the door is closed. The message center should display door ajar when the doors are open and the door ajar message should turn off when the door is closed.

Do the interior lights and message center operate as expected?
Yes GO to B6
No If the interior lights do not light when one of the RH doors is opened, DIAGNOSE the interior lighting concern.
REFER to: Interior Lighting (417-02 Interior Lighting) . If the interior lights do operate as expected and the door ajar message does not display on the message center when one of the RH doors is opened, DIAGNOSE the message center concern.
REFER to: Instrumentation, Message Center and Warning Chimes (413-01 Instrumentation, Message Center and Warning Chimes) .

B6 CHECK THE RIGHT SIDE MODULE TO MOTOR POWER AND RETURN CIRCUITS

NOTE: Use a meter with a min-max feature or recording capabilities to obtain accurate measurements. The RBM disables the voltage output immediately if the PRB motor is not present.

  • Ignition OFF.
  • Disconnect RH PRB motor C3186A .
  • Ignition ON.
  • Make sure the PRB is set to AUTO in the vehicle message center.
  • Close all vehicle doors.
  • Connect an Automotive Light Circuit Tester to the RH PRB motor electrical connector, harness side.
  • NOTE: Make sure all test connections are made at the PRB motor before the door is opened. Open any RH side door.
  • Measure: Use Automotive Light Circuit Tester 6-24V
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C3186A-1   C3186A-3

Does tester illuminate for less than 0.5 seconds when the RH door is opened?
Yes REPLACE the RH PRB motor.
REFER to: Power Running Board (PRB) Motor (501-08 Exterior Trim and Ornamentation, Removal and Installation).
No GO to B7

B7 CHECK RIGHT SIDE HALL-EFFECT SENSOR POWER CIRCUIT FOR AN OPEN
  • Ignition OFF.
  • Disconnect LH PRB motor C3185A .
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C3186A-4   C3185A-4

Is the resistance less than 3 ohms?
Yes GO to B8
No REPAIR the circuit.

B8 CHECK RIGHT SIDE HALL-EFFECT SENSOR RETURN CIRCUIT FOR AN OPEN
  • Ignition OFF.
  • Disconnect LH PRB motor C3185A .
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C3186A-6   C3185A-6

Is the resistance less than 3 ohms?
Yes REPLACE the RH PRB motor.
REFER to: Power Running Board (PRB) Motor (501-08 Exterior Trim and Ornamentation, Removal and Installation).
No REPAIR the circuit.


The PRB Does Not Operate Correctly - LH Side Does Not Deploy/Stow, or Reverses Direction


Refer to Wiring Diagrams Cell 109 for schematic and connector information.

Normal Operation and Fault Conditions

The LH Hall-effect sensor (Integral to the PRB motor) receives a regulated 5 volt power supply, and ground from the RBM . The RBM monitors PRB motor movement using the Hall-effect sensor signal from the PRB motor. The RBM receives door ajar status of each door over the MS-CAN . Door ajar signals trigger the RBM to deploy or stow the LH PRB .

Possible Causes

  • Wiring, terminals or connectors
  • Door ajar signal concern
  • Message center concern
  • Foreign material causing blockage of PRB movement
  • LH PRB motor
  • RBM

Visual Inspection and Diagnostic Pre-checks

  • Foreign material causing blockage of PRB movement

PINPOINT TEST C: THE LH (LEFT-HAND) PRB (POWER RUNNING BOARD) DOES NOT OPERATE CORRECTLY - DOES NOT DEPLOY/STOW, OR REVERSES DIRECTION
C1 CHECK FOR RBM (RUNNING BOARD CONTROL MODULE) DIAGNOSTIC TROUBLE CODES (DTCS)
  • Using a diagnostic scan tool, retrieve all Diagnostic Trouble Codes (DTCs) for the RBM .

Are any Diagnostic Trouble Codes (DTCs) present?
Yes REPAIR the DTC concern.
No GO to C2

C2 CHECK THE OPERATION OF THE POWER RUNNING BOARDS — AUTOMATIC MODE

NOTE: When a door is closed, a short delay is normal before the PRB retracts. This delay feature is to reduce excessive PRB cycling if a door is closed and another door on the same side is then opened (for example if a passenger is moving from the front seat to the rear seat).

  • Set the PRB system to the AUTO (enabled) mode.
  • Open and close the LH front door. The LH PRB should deploy when the door is open, and retract when the door is closed.
  • Open and close the LH rear door. The LH PRB should deploy when the door is open, and retract when the door is closed.

Does the LH PRB operate correctly?
Yes GO to C3
No GO to C4

C3 CHECK THE OPERATION OF THE POWER RUNNING BOARDS — MANUAL MODE
  • Set the PRB system to the OUT mode. Both Power Running Boards (PRBs) should deploy.

Do both Power Running Boards (PRBs) deploy?
Yes The system is operating as designed. REFER the customer to the Owner's Literature for correct PRB system operation.
No GO to C4

C4 CHECK THE POWER RUNNING BOARDS FOR FOREIGN MATERIAL
  • Check the step area and door sill of the RH PRB for foreign material or blockage.
  • Check the LH PRB hinge points for any corrosion that may cause binding.
  • Perform complete Power Running Board Cleaning And Maintenance as indicated in GSB 18-7081

Does the left running board now deploy with LH side door open in “AUTO” mode?
Yes SET the PRB system to the OUT mode and REMOVE the foreign material or corrosion. If necessary, a power washer can be used; however, avoid direct spray to the PRB motor. TEST the system for normal operation. REFER the customer to the Owner's Literature for correct cleaning instructions.
No GO to C5

C5 CHECK THE DOOR AJAR SWITCH OPERATION
  • Ignition ON.
  • Open and close the LH front and rear door, and verify the interior lights operate correctly and a door ajar message is noted on the vehicle message center. The interior lights should turn on when the door is opened and off when the door is closed. The message center should display door ajar when the doors are open and the door ajar message should turn off when the door is closed.

Do the interior lights and message center operate as expected?
Yes GO to C6
No If the interior lights do not light when one of the LH doors are opened, DIAGNOSE the interior lighting concern.
REFER to: Interior Lighting (417-02 Interior Lighting) . If the interior lights do operate as expected and the door ajar message does not display on the message center when one of the LH doors are opened, DIAGNOSE the message center concern.
REFER to: Instrumentation, Message Center and Warning Chimes (413-01 Instrumentation, Message Center and Warning Chimes) .

C6 CHECK THE LEFT SIDE MODULE TO MOTOR POWER AND RETURN CIRCUITS

NOTE: Use a meter with a min-max feature or recording capabilities to obtain accurate measurements. The RBM disables the voltage output immediately if the PRB motor is not present.

  • Ignition OFF.
  • Disconnect LH PRB motor C3185A .
  • Ignition ON.
  • Make sure the PRB is set to AUTO in the vehicle message center.
  • Close all vehicle doors.
  • Connect an Automotive Light Circuit Tester to the LH PRB motor electrical connector, harness side.
  • NOTE: Make sure all test connections are made at the PRB motor before the door is opened. Open any LH side door.
  • Measure: Use Automotive Light Circuit Tester 6-24V
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C3185A-1   C3185A-3

Does tester illuminate for less than 0.5 seconds when the LH door is opened?
Yes REPLACE the LH PRB motor.
REFER to: Power Running Board (PRB) Motor (501-08 Exterior Trim and Ornamentation, Removal and Installation).
No GO to C7

C7 CHECK LEFT HALL-EFFECT SENSOR POWER CIRCUIT FOR AN OPEN
  • Ignition OFF.
  • Disconnect RH PRB motor C3186A .
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C3186A-4   C3185A-4

Is the resistance less than 3 ohms?
Yes GO to C8
No REPAIR the circuit.

C8 CHECK LEFT SIDE HALL-EFFECT SENSOR RETURN CIRCUIT FOR AN OPEN
  • Ignition OFF.
  • Disconnect RH PRB motor C3186A .
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C3186A-6   C3185A-6

Is the resistance less than 3 ohms?
Yes REPLACE the LH PRB motor.
REFER to: Power Running Board (PRB) Motor (501-08 Exterior Trim and Ornamentation, Removal and Installation).
No REPAIR the circuit.


C1006:11, C1006:12, C1006:13, C1006:19


Refer to Wiring Diagrams Cell 109 for schematic and connector information.

Normal operation and Fault Conditions

The RBM determines the need to move the LH PRB and applies voltage and ground on only 2 circuits to the PRB motor in order to stow (retract) or deploy (extend) the PRB . To stow the PRB , the RBM applies voltage on the LEFT RB STOW circuit and ground on the LEFT RB DEPLOY circuit. To deploy the PRB switches the voltage and ground so the voltage is applied to the LEFT RB DEPLOY circuit and ground to the LEFT RB STOW circuit. The RBM monitors the PRB motor current draw while it is operating. These Diagnostic Trouble Codes (DTCS) will set if the circuits are interrupted or if the PRB motor current is above 45 Amps.


  DTC Fault Trigger Conditions


DTC Description Fault Trigger Conditions
C1006:11 Left Power Running Board Motor: Circuit Short To Ground This DTC sets if the LH PRB motor stow or deploy circuit is shorted to ground when a movement is requested.
C1006:12 Left Power Running Board Motor: Circuit Short To Battery This DTC sets if the LH PRB motor stow or deploy circuit is shorted to voltage when a movement is requested.
C1006:13 Left Power Running Board Motor: Circuit Open This DTC sets if the LH PRB motor stow or deploy circuit is open when a movement is requested.
C1006:19 Left Power Running Board Motor: Above Threshold This DTC sets if the LH PRB motor current draw is above excessive.

Possible Sources

  • Wiring, terminals or connectors
  • LH PRB motor
  • RBM

Visual Inspection and Diagnostic Pre-checks

  • LH PRB motor harness connections and wiring.

PINPOINT TEST D: C1006:11, C1006:12, C1006:13, C1006:19
NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.
D1 CHECK THE LH (LEFT-HAND) PRB (POWER RUNNING BOARD) MOTOR CONTROL CIRCUITS FOR A SHORT TO VOLTAGE
  • Ignition OFF.
  • Disconnect Left PRB motor C3185A .
  • Ignition ON.
  • Wait 10 seconds so any PRB movement commands are complete.
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C3185A-1   Ground
      C3185A-3   Ground

Is any voltage present?
Yes REPAIR the circuit.
No GO to D2

D2 CHECK THE LH (LEFT-HAND) PRB (POWER RUNNING BOARD) MOTOR CONTROL CIRCUITS FOR A SHORT TO GROUND
  • Ignition OFF.
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C3185A-1   Ground
      C3185A-3   Ground

Are the resistances greater than 10,000 Ohms?
Yes GO to D3
No REPAIR the circuit.

D3 CHECK THE LH (LEFT-HAND) PRB (POWER RUNNING BOARD) MOTOR CONTROL CIRCUITS FOR AN OPEN
  • Disconnect RBM C3313A .
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C3185A-1   C3313A-2
      C3185A-3   C3313A-1

Are the resistances less than 3 Ohms?
Yes GO to D4
No REPAIR the circuit.

D4 CHECK THE LH (LEFT-HAND) PRB (POWER RUNNING BOARD) MOTOR CIRCUITS FOR A SHORT TOGETHER
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C3185A-1   C3185A-3
      C3185A-1   C3185A-5
      C3185A-1   C3185A-6
      C3185A-1   C3185A-4
      C3185A-3   C3185A-5
      C3185A-3   C3185A-6
      C3185A-3   C3185A-4
      C3185A-5   C3185A-6
      C3185A-5   C3185A-4
      C3185A-6   C3185A-4

Are the resistances greater than 10,000 ohms?
Yes GO to D5
No REPAIR the circuit.

D5 CHECK FOR CORRECT RBM (RUNNING BOARD CONTROL MODULE) OUTPUT

NOTE: Use a meter with a min-max feature or recording capabilities to obtain accurate measurements. The RBM disables the voltage output immediately if the PRB motor is not present

  • Connect RBM C3313A .
  • Ignition ON.
  • Make sure the PRB is set to AUTO in the vehicle message center.
  • Close all vehicle doors.
  • Connect an Automotive Light Circuit Tester to the LH PRB motor electrical connector, harness side.
  • NOTE: Make sure all test connections are made at the PRB motor before the LH door is opened. Open any LH side door.
  • Measure: Use Automotive Light Circuit Tester 6-24V
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C3185A-3   C3185A-1

Does tester illuminate for less than 0.5 seconds when the LH door is opened?
Yes REPLACE the PRB motor.
REFER to: Power Running Board (PRB) Motor (501-08 Exterior Trim and Ornamentation, Removal and Installation).
No GO to D6

D6 CHECK FOR CORRECT RBM (RUNNING BOARD CONTROL MODULE) OPERATION
  • Ignition OFF.
  • Disconnect All PRB system and related in-line connectors.
  • Check for:
    • corrosion – install new connector or terminals and clean module pins
    • damaged or bent pins – install new terminals or pins
    • pushed-out pins – install new pins as necessary
  • Connect all PRB system and related in-line connectors and make sure they seat correctly.
  • Operate the system and verify the concern is still present.

Is the concern still present?
Yes CHECK OASIS for any applicable Technical Service Bulletins (TSBs). If a TSB exists for this concern, DISCONTINUE this test and FOLLOW TSB instructions. If no Technical Service Bulletins (TSBs) address this concern, INSTALL a new RBM .
REFER to: Running Board Control Module (RBM) (501-08 Exterior Trim and Ornamentation, Removal and Installation).
No The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.


C1007:11, C1007:12, C1007:13, C1007:19


Refer to Wiring Diagrams Cell 109 for schematic and connector information.

Normal operation and Fault Conditions

The RBM determines the need to move the RH PRB and applies voltage and ground on only 2 circuits to the PRB motor in order to stow (retract) or deploy (extend) the PRB . To stow the PRB , the RBM applies voltage on the RIGHT RB STOW circuit and ground on the RIGHT RB DEPLOY circuit. To deploy the PRB the RBM switches the voltage and ground so the voltage is applied to the RIGHT RB DEPLOY circuit and ground to the RIGHT RB STOW circuit. The RBM monitors the PRB motor current draw while it is operating. These Diagnostic Trouble Codes (DTCS) will set if the circuits are interrupted or if the PRB motor current is above 45 Amps.


  DTC Fault Trigger Conditions


DTC Description Fault Trigger Conditions
C1007:11 Right Power Running Board Motor: Circuit Short To Ground This DTC sets if the RH PRB motor stow or deploy circuit is shorted to ground when a movement is requested.
C1007:12 Right Power Running Board Motor: Circuit Short To Battery This DTC sets if the RH PRB motor stow or deploy circuit is shorted to voltage when a movement is requested.
C1007:13 Right Power Running Board Motor: Circuit Open This DTC sets if the RH PRB motor stow or deploy circuit is open when a movement is requested.
C1007:19 Right Power Running Board Motor: Above Threshold This DTC sets if the RH PRB motor current draw is excessive.

Possible Sources

  • Wiring, terminals or connectors
  • RH PRB motor
  • RBM

Visual Inspection and Diagnostic Pre-checks

  • RH PRB motor harness connections and wiring.

PINPOINT TEST E: C1007:11, C1007:12, C1007:13, C1007:19
NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.
E1 CHECK THE RH (RIGHT-HAND) PRB (POWER RUNNING BOARD) MOTOR CONTROL CIRCUITS FOR A SHORT TO VOLTAGE
  • Ignition OFF.
  • Disconnect RH PRB motor C3186A .
  • Ignition ON.
  • Wait 10 seconds so any PRB movement commands are complete.
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C3186A-1   Ground
      C3186A-3   Ground

Is any voltage present?
Yes REPAIR the circuit.
No GO to E2

E2 CHECK THE RH (RIGHT-HAND) PRB (POWER RUNNING BOARD) MOTOR CONTROL CIRCUITS FOR A SHORT TO GROUND
  • Ignition OFF.
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C3186A-1   Ground
      C3186A-3   Ground

Are the resistances greater than 10,000 Ohms?
Yes GO to E3
No REPAIR the circuit.

E3 CHECK THE RH (RIGHT-HAND) PRB (POWER RUNNING BOARD) MOTOR CONTROL CIRCUITS FOR AN OPEN
  • Disconnect RBM C3313A .
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C3186A-1   C3313A-3
      C3186A-3   C3313A-4

Are the resistances less than 3 Ohms?
Yes GO to E4
No REPAIR the circuit.

E4 CHECK THE RH (RIGHT-HAND) PRB (POWER RUNNING BOARD) MOTOR CIRCUITS FOR A SHORT TOGETHER
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C3186A-1   C3186A-3
      C3186A-1   C3186A-5
      C3186A-1   C3186A-6
      C3186A-1   C3186A-4
      C3186A-3   C3186A-5
      C3186A-3   C3186A-6
      C3186A-3   C3186A-4
      C3186A-5   C3186A-6
      C3186A-5   C3186A-4
      C3186A-6   C3186A-4

Are the resistances greater than 10,000 ohms?
Yes GO to E5
No REPAIR the circuit.

E5 CHECK FOR CORRECT RBM (RUNNING BOARD CONTROL MODULE) OUTPUT

NOTE: Use a meter with a min-max feature or recording capabilities to obtain accurate measurements. The RBM disables the voltage output immediately if the PRB motor is not present

  • Connect RBM C3313A .
  • Ignition ON.
  • Make sure the PRB is set to AUTO in the vehicle message center.
  • Close all vehicle doors.
  • Connect an Automotive Light Circuit Tester to the RH PRB motor electrical connector, harness side.
  • NOTE: Make sure all test connections are made at the PRB motor before the RH door is opened. Open any RH side door.
  • Measure: Use Automotive Light Circuit Tester 6-24V
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C3186A-3   C3186A-1

Does tester illuminate for less than 0.5 seconds when the RH door is opened?
Yes REPLACE the RH PRB motor.
REFER to: Power Running Board (PRB) Motor (501-08 Exterior Trim and Ornamentation, Removal and Installation).
No GO to E6

E6 CHECK FOR CORRECT RBM (RUNNING BOARD CONTROL MODULE) OPERATION
  • Ignition OFF.
  • Disconnect All PRB system and related in-line connectors.
  • Check for:
    • corrosion – install new connector or terminals and clean module pins
    • damaged or bent pins – install new terminals or pins
    • pushed-out pins – install new pins as necessary
  • Connect all PRB system and related in-line connectors and make sure they seat correctly.
  • Operate the system and verify the concern is still present.

Is the concern still present?
Yes CHECK OASIS for any applicable Technical Service Bulletins (TSBs). If a TSB exists for this concern, DISCONTINUE this test and FOLLOW TSB instructions. If no Technical Service Bulletins (TSBs) address this concern, INSTALL a new RBM .
REFER to: Running Board Control Module (RBM) (501-08 Exterior Trim and Ornamentation, Removal and Installation).
No The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.


C1008:93, C1009:93, C1B14:11, C1B14:12


Refer to Wiring Diagrams Cell 109 for schematic and connector information.

Normal operation and Fault Conditions

TheRBM monitors the movement, position and current draw of each PRB with a hall-effect switch that is integral to each PRB motor. The RBM supplies a shared 10 volt controlled voltage and a shared ground circuit to the PRB motor hall-effect sensors, and receives separate sensor signals from the RH and LH hall-effect sensors. Voltage varies on the LEFT or RIGHT RB hall-effect signal circuit as the motor moves the PRB . An open or shorted circuit will set these DTC .


  DTC Fault Trigger Conditions


DTC Description Fault Trigger Conditions
C1008:93 Left Power Running Board Position/Motion Sensor: No Operation This DTC sets if the system voltage is between 9.5 - 16 volts, the LH PRB motion is commanded and the left RB hall effect signal circuit at the RBM does not change.
C1009:93 Right Power Running Board Position/Motion Sensor: No Operation This DTC sets if the system voltage is between 9.5 - 16 volts, the RH PRB motion is commanded and the right RB hall effect signal circuit at the RBM does not change.
C1B14:11 Sensor Supply Voltage A: Circuit Short To Ground This DTC sets if the system voltage is between 9.5 - 16 volts, any PRB motion is commanded and the hall effect power circuit at the RBM is less than 7.5 volts.
C1B14:12 Sensor Supply Voltage A: Circuit Short To Battery This DTC sets if the system voltage is between 9.5 - 16 volts, any PRB motion is commanded and the hall effect power circuit at the RBM is greater than 10 volts.

Possible Sources

  • Wiring, terminals or connectors
  • RH or LH PRB motor
  • RBM

Visual Inspection and Diagnostic Pre-checks

  • RH and LH PRB motor harness connections and wiring.

PINPOINT TEST F: C1008:93, C1009:93, C1B14:11, C1B14:12
NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.
F1 CHECK THE HALL EFFECT POWER AND RETURN CIRCUITS BETWEEN THE PRB (POWER RUNNING BOARD) MOTORS FOR AN OPEN
  • Ignition OFF.
  • Disconnect LH PRB motor C3185A .
  • Disconnect RH PRB motor C3186A .
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C3185A-4   C3186A-4
      C3185A-6   C3186A-6

Are the resistances less than 3 ohms?
Yes GO to F2
No REPAIR the circuit.

F2 CHECK THE HALL-EFFECT SENSOR POWER AND RETURN CIRCUITS

NOTE: Use a meter with a min-max feature or recording capabilities to obtain accurate measurements. The RBM disables the voltage output immediately if the PRB motor is not present.

  • Ignition ON.
  • Make sure the PRB is set to AUTO in the vehicle message center.
  • Close all vehicle doors.
  • Connect the meter to the RH PRB motor electrical connector, harness side.
  • Set the meter to measure DC (direct current) voltage.
  • Set the meter range to greater than 15 volts.
  • Enable the min-max or recording feature on the meter.
  • NOTE: Make sure all test connections are made at the PRB motor before the door is opened. Open any RH side door.
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C3186A-4   C3186A-6

Is the voltage is greater then 4 volts?
Yes GO to F7
No If the voltage was less than 7 volts, GO to F3
If the voltage was greater than 10.5 volts, GO to F6

F3 CHECK HALL-EFFECT SENSOR POWER CIRCUIT FOR VOLTAGE

NOTE: Use a meter with a min-max feature or recording capabilities to obtain accurate measurements. The RBM disables the voltage output immediately if the PRB motor is not present.

  • Close all vehicle doors.
  • Connect the meter to the RH PRB motor electrical connector, harness side.
  • Set the meter to measure DC (direct current) voltage.
  • Set the meter range to greater than 15 volts.
  • Enable the min-max or recording feature on the meter.
  • NOTE: Make sure all test connections are made at the PRB motor before the door is opened. Open any RH side door.
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C3186A-4   Ground

Is the voltage is greater then 4 volts?
Yes GO to F5
No GO to F4

F4 CHECK HALL-EFFECT SENSOR POWER CIRCUIT FOR AN OPEN OR SHORT TO GROUND
  • Ignition OFF.
  • Disconnect RBM C3313B .
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C3186A-4   C3313B-5
      C3186A-4   Ground

Is the resistance less than 3 ohms between the PRB motor and the RBM module; and greater than 10,000 ohms between the PRB motor and ground?
Yes GO to F9
No REPAIR the circuit.

F5 CHECK THE HALL-EFFECT SENSOR RETURN CIRCUIT FOR AN OPEN
  • Ignition OFF.
  • Disconnect RBM C3313B .
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C3186A-6   C3313B-14

Is the resistance less than 3 ohms?
Yes GO to F9
No REPAIR the circuit.

F6 CHECK THE HALL-EFFECT SENSOR POWER CIRCUIT FOR A SHORT TO VOLTAGE
  • Ignition OFF.
  • Disconnect RBM C3313B .
  • Ignition ON.
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C3186A-4   Ground

Is any voltage present?
Yes REPAIR the circuit.
No GO to F9

F7 CHECK THE HALL-EFFECT SENSOR SIGNAL CIRCUIT FOR A SHORT TO VOLTAGE
  • Ignition OFF.
  • Disconnect RBM C3313B .
  • Ignition ON.
  • For DTC C1009:93 ( RH side), measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C3186A-5   Ground
  • For DTC C1008:93 ( LH side), measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C3185A-5   Ground

Is any voltage present?
Yes REPAIR the circuit.
No GO to F8

F8 CHECK THE HALL-EFFECT SENSOR SIGNAL CIRCUIT FOR AN OPEN OR SHORT TO GROUND
  • Ignition OFF.
  • For DTC C1009:93 ( RH side), measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C3186A-5   C3313B-10
      C3186A-5   Ground
  • For DTC C1008:93 ( LH side), measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C3185A-5   C3313B-9
      C3185A-5   Ground

Is the resistance less than 3 ohms between the PRB motor and RBM ; and greater than 10,000 ohms between the PRB motor and ground?
Yes For DTC C1009:93, REPLACE the RH PRB motor.
REFER to: Power Running Board (PRB) Motor (501-08 Exterior Trim and Ornamentation, Removal and Installation). For DTC C1008:93, REPLACE the LH PRB motor.
REFER to: Power Running Board (PRB) Motor (501-08 Exterior Trim and Ornamentation, Removal and Installation).
No REPAIR the circuit.

F9 CHECK THE RBM (RUNNING BOARD CONTROL MODULE) FOR CORRECT OPERATION
  • Ignition OFF.
  • Disconnect All PRB system and related in-line connectors.
  • Check for:
    • corrosion – install new connector or terminals and clean module pins
    • damaged or bent pins – install new terminals or pins
    • pushed-out pins – install new pins as necessary
  • Connect all PRB system and related in-line connectors and make sure they seat correctly.
  • Operate the system and verify the concern is still present.

Is the concern still present?
Yes CHECK OASIS for any applicable Technical Service Bulletins (TSBs). If a TSB exists for this concern, DISCONTINUE this test and FOLLOW TSB instructions. If no Technical Service Bulletins (TSBs) address this concern, INSTALL a new RBM .
REFER to: Running Board Control Module (RBM) (501-08 Exterior Trim and Ornamentation, Removal and Installation).
No The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.


U0146


Refer to Wiring Diagrams Cell 14 for schematic and connector information.

Normal operation and Fault Conditions

With normal battery voltage and the ignition ON, the GWM sends messages to the RBM over the MS-CAN . If the RBM does not receive these messages within a certain time frame, the RBM sets a DTC . For information on the messages sent to the RBM by the GWM , refer to the Network Message Chart.
REFER to: Power Running Board (PRB) (501-08 Exterior Trim and Ornamentation) .


  DTC Fault Trigger Conditions


DTC Description Fault Trigger Conditions
U0146 Lost Communication with Gateway "A": No Sub Type Information This DTC sets if messages received from the GWM are missing for 5 seconds or more.

Possible Sources

  • Communications concern
  • GWM
  • RBM

PINPOINT TEST G: U0146
NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.
G1 CHECK THE COMMUNICATION NETWORK
  • Ignition ON.
  • Using a diagnostic scan tool, carry out the Network Test.

Does the GWM pass the Network Test?
Yes GO to G2
No DIAGNOSE the GWM does not respond to the scan tool.
REFER to: Communications Network (418-00 Module Communications Network) .

G2 RECHECK THE RBM (RUNNING BOARD CONTROL MODULE) DIAGNOSTIC TROUBLE CODES (DTCS).
  • Using a diagnostic scan tool, clear the Diagnostic Trouble Codes (DTCs).
  • Ignition OFF.
  • Ignition ON.
  • Using a diagnostic scan tool, carry out the RBM self-test.

Is DTC U0146:00 retrieved again?
Yes GO to G3
No The system is operating correctly at this time. The DTC may have been set due to high network traffic or an intermittent fault condition.

G3 CHECK THE GWM (GATEWAY MODULE A) DIAGNOSTIC TROUBLE CODES (DTCS)
  • Using a diagnostic scan tool, check GWM Diagnostic Trouble Codes (DTCs).

Are any Diagnostic Trouble Codes (DTCS) present in the GWM ?
Yes DIAGNOSE the GWM Diagnostic Trouble Codes (DTCS).
REFER to: Communications Network (418-00 Module Communications Network) .
No GO to G4

G4 CHECK FOR DTC (DIAGNOSTIC TROUBLE CODE) U0146:00 SET IN OTHER MODULES
  • Using a diagnostic scan tool, carry out the self-test to retrieve all Continuous Memory Diagnostic Trouble Codes (CMDTCs) from all modules.

Is DTC U0146:00 set in other modules?
Yes GO to G5
No GO to G6

G5 CHECK FOR CORRECT GWM (GATEWAY MODULE A) OPERATION
  • Ignition OFF.
  • Disconnect All GWM and related in-line connectors.
  • Check for:
    • corrosion – install new connector or terminals and clean module pins
    • damaged or bent pins – install new terminals or pins
    • pushed-out pins – install new pins as necessary
  • Connect all GWM system and related in-line connectors and make sure they seat correctly.
  • Operate the system and verify the concern is still present.

Is the concern still present?
Yes CHECK OASIS for any applicable Technical Service Bulletins (TSBs). If a TSB exists for this concern, DISCONTINUE this test and FOLLOW TSB instructions. If no Technical Service Bulletins (TSBs) address this concern, INSTALL a new GWM .
REFER to: Gateway Module A (GWM) (418-00 Module Communications Network) .
No The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.

G6 CHECK FOR CORRECT RBM (RUNNING BOARD CONTROL MODULE) OPERATION
  • Ignition OFF.
  • Disconnect All PRB system and related in-line connectors.
  • Check for:
    • corrosion – install new connector or terminals and clean module pins
    • damaged or bent pins – install new terminals or pins
    • pushed-out pins – install new pins as necessary
  • Connect all PRB system and related in-line connectors and make sure they seat correctly.
  • Operate the system and verify the concern is still present.

Is the concern still present?
Yes CHECK OASIS for any applicable Technical Service Bulletins (TSBs). If a TSB exists for this concern, DISCONTINUE this test and FOLLOW TSB instructions. If no Technical Service Bulletins (TSBs) address this concern, INSTALL a new RBM .
REFER to: Running Board Control Module (RBM) (501-08 Exterior Trim and Ornamentation, Removal and Installation).
No The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.


U3003:16


Refer to Wiring Diagrams Cell 109 for schematic and connector information.

Normal operation and Fault Conditions

The RBM receives battery voltage from BJB fuse F89 (40A) at all times and ground at G200.


  DTC Fault Trigger Conditions


DTC Description Fault Trigger Conditions
U3003:16 Battery Voltage: Circuit Voltage Below Threshold This DTC sets in continuous memory and on-demand if the supply voltage falls below 8.7 volts after a PRB movement is requested.

Possible Sources

  • Wiring, terminals or connectors
  • Battery condition
  • Charging system concern
  • RBM

Visual Inspection and Diagnostic Pre-checks

  • Make sure the vehicle battery terminals and cables are free of any corrosion and other contaminants.
  • Make sure the vehicle battery terminals are tightened to their correct torque specifications.

PINPOINT TEST H: U3003:16
NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.
H1 RECHECK FOR DTC (DIAGNOSTIC TROUBLE CODE) U3003:16
  • Turn the engine off.
  • Ignition ON.
  • Using a diagnostic scan tool, carry out the RBM self-test.
  • Clear the RBM Diagnostic Trouble Codes (DTCs).
  • Ignition OFF.
  • Ignition ON.
  • Repeat the RBM self-test.

Is DTC U3003:16 still present?
Yes GO to H2
No The system is operating normally at this time. The DTC may have been set due to a previous low battery voltage condition.

H2 CHECK FOR LOW VOLTAGE DIAGNOSTIC TROUBLE CODES (DTCS) SET IN OTHER MODULES
  • Using a diagnostic scan tool, retrieve and record all Diagnostic Trouble Codes (DTCs) for all modules.

Are any low voltage or charging system Diagnostic Trouble Codes (DTCs) set in any other modules?
Yes DIAGNOSE the under charging condition.
REFER to: Charging System (414-00 Charging System - General Information) .
No GO to H3

H3 CHECK THE BATTERY CONDITION AND STATE OF CHARGE
  • Check the battery condition and verify that the battery is fully charged.
    REFER to: Battery (414-01 Battery, Mounting and Cables) .

Is the battery OK and fully charged?
Yes GO to H4
No
REFER to: Charging System (414-00 Charging System - General Information) .

H4 CHECK THE RBM (RUNNING BOARD CONTROL MODULE) VBATT CIRCUIT
  • Ignition OFF.
  • Measure and record the voltage at the battery.
  • Disconnect RBM C3313B .
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C3313B-1   Ground

Is the voltage within 0.2 volts of the recorded battery voltage?
Yes GO to H5
No REPAIR the circuit.

H5 CHECK THE RBM (RUNNING BOARD CONTROL MODULE) GROUND CIRCUIT
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C3313B-4   Ground

Is the resistance less than 3 ohms?
Yes GO to H6
No REPAIR the circuit.

H6 CHECK FOR CORRECT RBM (RUNNING BOARD CONTROL MODULE) OPERATION
  • Ignition OFF.
  • Disconnect All PRB system and related in-line connectors.
  • Check for:
    • corrosion – install new connector or terminals and clean module pins
    • damaged or bent pins – install new terminals or pins
    • pushed-out pins – install new pins as necessary
  • Connect all PRB system and related in-line connectors and make sure they seat correctly.
  • Operate the system and verify the concern is still present.

Is the concern still present?
Yes CHECK OASIS for any applicable Technical Service Bulletins (TSBs). If a TSB exists for this concern, DISCONTINUE this test and FOLLOW TSB instructions. If no Technical Service Bulletins (TSBs) address this concern, INSTALL a new RBM .
REFER to: Running Board Control Module (RBM) (501-08 Exterior Trim and Ornamentation, Removal and Installation).
No The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.


U3003:17


Refer to Wiring Diagrams Cell 109 for schematic and connector information.

Normal operation and Fault Conditions

The RBM receives battery voltage from BJB fuse F89 (40A) at all times and ground at G200.


  DTC Fault Trigger Conditions


DTC Description Fault Trigger Conditions
U3003:17 Battery Voltage: Circuit Voltage Above Threshold This DTC sets in continuous memory and on-demand if the voltage rises above 16.5 volts after PRB movement is requested.

Possible Sources

  • Wiring, terminals or connectors
  • Charging system condition
  • RBM

PINPOINT TEST I: U3003:17
NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.
I1 RECHECK FOR DTC (DIAGNOSTIC TROUBLE CODE) U3003:17
  • Turn the engine off.
  • Ignition ON.
  • Using a diagnostic scan tool, carry out the RBM self-test.
  • Clear the RBM Diagnostic Trouble Codes (DTCs).
  • Ignition OFF.
  • Ignition ON.
  • Repeat the RBM self-test.

Is DTC U3003:17 still present?
Yes GO to I2
No The system is operating normally at this time. The DTC may have been set previously during battery charging or while jump starting the vehicle.

I2 CHECK FOR HIGH VOLTAGE DIAGNOSTIC TROUBLE CODES (DTCS) SET IN OTHER MODULES
  • Using a diagnostic scan tool, retrieve and record all Diagnostic Trouble Codes (DTCs) for all modules.

Are any high voltage or charging system Diagnostic Trouble Codes (DTCs) set in any other modules?
Yes DIAGNOSE the overcharging condition.
REFER to: Charging System (414-00 Charging System - General Information) .
No GO to I3

I3 CHECK THE BATTERY VOLTAGE
  • Turn off all interior lights, exterior lights and accessories.
  • Start and run the engine at approximately 1,500 RPM for 3 minutes while monitoring the battery voltage.

Does the battery voltage rise to greater than 15.5 volts?
Yes DIAGNOSE the over charging condition.
REFER to: Charging System (414-00 Charging System - General Information) .
No GO to I4

I4 CHECK FOR CORRECT RBM (RUNNING BOARD CONTROL MODULE) OPERATION
  • Ignition OFF.
  • Disconnect All PRB system and related in-line connectors.
  • Check for:
    • corrosion – install new connector or terminals and clean module pins
    • damaged or bent pins – install new terminals or pins
    • pushed-out pins – install new pins as necessary
  • Connect all PRB system and related in-line connectors and make sure they seat correctly.
  • Operate the system and verify the concern is still present.

Is the concern still present?
Yes CHECK OASIS for any applicable Technical Service Bulletins (TSBs). If a TSB exists for this concern, DISCONTINUE this test and FOLLOW TSB instructions. If no Technical Service Bulletins (TSBs) address this concern, INSTALL a new RBM .
REFER to: Running Board Control Module (RBM) (501-08 Exterior Trim and Ornamentation, Removal and Installation).
No The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.


U0140:00


Refer to Wiring Diagrams Cell 14 for schematic and connector information.

Normal operation and Fault Conditions

With normal battery voltage and the ignition ON, the BCM sends messages to the RBM over the MS-CAN . If the RBM does not receive these messages within a certain time frame, the RBM sets a DTC . For information on the messages sent to the RBM by the BCM , refer to the Network Message Chart.


  DTC Fault Trigger Conditions


DTC Description Fault Trigger Conditions
U0140:00 Lost Communication with Body Control Module: No Sub Type Information This DTC sets if messages are not received from the BCM for 5 seconds or more.

Possible Sources

  • Communications concern
  • BCM
  • RBM

PINPOINT TEST J: U0140:00
NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.
J1 CHECK THE COMMUNICATION NETWORK
  • Ignition ON.
  • Using a diagnostic scan tool, carry out the Network Test.

Does the BCM pass the Network Test?
Yes GO to J2
No DIAGNOSE the BCM does not respond to the scan tool.
REFER to: Communications Network (418-00 Module Communications Network) .

J2 RECHECK FOR RBM (RUNNING BOARD CONTROL MODULE) DIAGNOSTIC TROUBLE CODES (DTCS).
  • Using a diagnostic scan tool, clear the Diagnostic Trouble Codes (DTCs).
  • Ignition OFF.
  • Ignition ON.
  • Using a diagnostic scan tool, carry out the RBM self-test.
  • Record all RBM Diagnostic Trouble Codes (DTCs).

Is DTC U0140:00 retrieved again?
Yes GO to J3
No The system is operating correctly at this time. The DTC may have been set due to high network traffic or an intermittent fault condition.

J3 REVIEW THE RECORDED RBM (RUNNING BOARD CONTROL MODULE) DIAGNOSTIC TROUBLE CODES (DTCS)
  • Review the previously recorded RBM Diagnostic Trouble Codes (DTCs).

Was DTC U3003:16 or U3003:17 recorded?
Yes For DTC U3003:16, GO to Pinpoint Test H
For DTC U3003:17, GO to Pinpoint Test I
No GO to J4

J4 CHECK FOR BCM (BODY CONTROL MODULE) DIAGNOSTIC TROUBLE CODES (DTCS)
  • Using a diagnostic scan tool, carry out the BCM self-test.

Are any Diagnostic Trouble Codes (DTCs) present in the BCM ?
Yes DIAGNOSE the BCM Diagnostic Trouble Codes (DTCs).
REFER to: Body Control Module (BCM) (419-10 Multifunction Electronic Modules) .
No GO to J5

J5 CHECK FOR OTHER CAUSES OF COMMUNICATION NETWORK CONCERN

NOTE: If new modules were installed prior to the DTC being set, the module configuration can be incorrectly set during the PMI or the PMI may not have been carried out.

  • Check the vehicle service history for recent service actions related to the BCM or RBM . If recent service history is found:
    • verify the correct replacement module was installed.
      • HVBOM may be used to verify correct part fitment.
    • verify the configuration of replacement module was correct.
      • re-configure the module using as-built data if prior configuration is suspect.
    • verify the module was not obtained from a like vehicle and installed into customer vehicle.
      • return the swapped module to source vehicle and obtain new replacement module.
  • Operate the system and determine if the observable symptom is still present.

Is the observable symptom still present?
Yes GO to J6
No The system is operating correctly at this time. The concern may have been due to incorrect parts replacement procedures or incorrect module configuration.

J6 VERIFY ALL WIRING CONNECTIONS
  • Ignition OFF.
  • Disconnect RBM C3313A and C3313B.
  • Disconnect all BCM electrical connectors.
  • Disconnect all in-line electrical connectors between the RBM and the BCM .
  • Using a good light source, inspect all disconnected electrical connectors for the following:
    • corrosion - install new connector or terminal and clean the module pins
    • damaged or bent pins - install new terminals or pins
    • pushed-out pins - install new pins as necessary
    • spread terminals - install new terminals as necessary

Are the connectors free of corrosion, damaged pins, bent pins, pushed-out pins and spread terminals?
Yes GO to J7
No REPAIR the connector or terminals.
Refer to Wiring Diagrams Cell 5 for schematic and connector information.

J7 CHECK FOR DTC (DIAGNOSTIC TROUBLE CODE) U0140:XX SET IN OTHER MODULES
  • Connect all in-line electrical connectors between the RBM and the BCM . Make sure they seat and latch correctly.
  • Connect all BCM electrical connectors. Make sure they seat and latch correctly.
  • Connect RBM C3313A and C3313B. Make sure they seat and latch correctly.
  • Ignition ON.
  • Using a diagnostic scan tool, carry out the self-test to retrieve all Continuous Memory Diagnostic Trouble Codes (CMDTCs) from all modules.

Is DTC U0140:xx set in one or more modules in addition to the RBM ?
Yes CHECK OASIS for any applicable Technical Service Bulletins (TSBs). If a TSB exists for this concern, DISCONTINUE this test and FOLLOW TSB instructions. If no Technical Service Bulletins (TSBs) address this concern, INSTALL a new BCM .
REFER to: Body Control Module (BCM) (419-10 Multifunction Electronic Modules) .
No If DTC is not present in any module, the system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. ADDRESS the root cause of any connector or pin issues.
If DTC is present only in the RBM , CHECK OASIS for any applicable Technical Service Bulletins (TSBs). If a TSB exists for this concern, DISCONTINUE this test and FOLLOW TSB instructions. If no Technical Service Bulletins (TSBs) address this concern, INSTALL a new RBM .
REFER to: Running Board Control Module (RBM) (501-08 Exterior Trim and Ornamentation, Removal and Installation).


U1000:00

Normal Operation and Fault Conditions

The BCM uses a solid state driver (Field Effect Transistor (FET)) to control the output of several vehicle systems. When an overload occurs on any of these drivers, the BCM disables the output and tracks the number of repetitive faults on each of these circuits. The module compares this number of overloads to 3 progressive thresholds established for each circuit. At each threshold, DTC U1000:00 sets along with the DTC associated with the affected circuit.


  DTC Fault Trigger Conditions


DTC Description Fault Trigger Conditions
U1000:00 Solid State Driver Protection Active: Driver Disabled: No Sub Type Information A continuous memory DTC that sets when the BCM has disabled a circuit due to a repetitive circuit overload and a progressive threshold is met.

Possible Sources

  • BCM output circuit short
  • BCM

PINPOINT TEST K: U1000:00
K1 REVIEW THE DIAGNOSTIC TROUBLE CODES (DTCS)
  • Ignition ON.
  • Perform the BCM self-test.
  • Review the Diagnostic Trouble Codes (DTCs) from the BCM self-test.

Are any Diagnostic Trouble Codes (DTCs) present besides U1000:00?
Yes CORRECT the Diagnostic Trouble Codes (DTCs). REFER to the BCM DTC Chart.
REFER to: Body Control Module (BCM) (419-10 Multifunction Electronic Modules) .
No GO to K2

K2 REPEAT THE BCM (BODY CONTROL MODULE) SELF-TEST
  • Using a diagnostic scan tool, clear the Diagnostic Trouble Codes (DTCs).
  • Wait 10 seconds.
  • Repeat the BCM self-test.

Is DTC U1000:00 still present?
Yes CHECK OASIS for any applicable Technical Service Bulletins (TSBs). If a TSB exists for this concern, DISCONTINUE this test and FOLLOW TSB instructions. If no Technical Service Bulletins (TSBs) address this concern, INSTALL a new BCM .
REFER to: Body Control Module (BCM) (419-10 Multifunction Electronic Modules, Removal and Installation).
No The system is operating correctly at this time. The circuit short has been repaired.


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