LEMON Manuals: Even more car manuals for everyone
Home >> Ford >> 2021 >> Transit-250 Base, Van Cargo Extended, 3.5L Eng VIN 8, AWD >> Repair and Diagnosis >> Brakes >> Parking Brake System >> Parking Brake And Actuation - Vehicles With: Electronic Parking Brake (EPB) >> Diagnosis And Testing >> Parking Brake >> Pinpoint Tests >> Pinpoint Test D: The Parking Brake Does Not Hold The Vehicle, Does Not Apply, Does Not Release Using The Automatic Release Function

Pinpoint Test D: The Parking Brake Does Not Hold The Vehicle, Does Not Apply, Does Not Release Using The Automatic Release Function

  1. Refer to VEHICLE DYNAMIC SYSTEMS for schematic and connector information.

    Normal Operation and Fault Conditions 

    When the ABS module receives a parking brake apply or release request, the ABS module sends voltage to the parking brake actuator motors. The ABS module also monitors the current draw of the actuator motors to determine when the brake pads contact the brake disc, to determine when the appropriate amount of clamping force is being applied to the brake disc and to determine when the brake pads are retracted to their start position. A HS-CAN issue or concern results in a failure to release the parking brake. The ABS module runs self-tests before, during and after an apply or release request. These self-tests are done to determine parking brake system functionality. High actuator motor circuit resistance, a short to ground, a short to voltage, an open circuit, a mechanical or electrical failure of the actuator motor or an internal failure of the ABS module may cause one or more of these self-tests to fail resulting in the ABS module setting one or more Diagnostic Trouble Codes (DTCs). The actuator motors have a serviceable jumper harness connecting the actuator motor to the body harness at C143.

    REFER to: Parking Brake - System Operation and Component Description .

    DTC Fault Trigger Conditions 

    DTC Description Fault Trigger Condition
    ABS C2005:18 Right Actuator: Circuit Current Below Threshold This DTC sets in continuous memory and on-demand if the ABS module detects low current during apply of parking brake.
    ABS C2005:19 Right Actuator: Circuit Current Above Threshold This DTC sets in continuous memory and on-demand if the ABS module detects high current during apply of parking brake.
    ABS C2005:1D Right Actuator: Circuit Current Out Of Range This DTC sets in continuous memory and on-demand if the ABS module detects current out of range during apply of parking brake.
    ABS C2006:78 Left Actuator: Alignment Or Adjustment Incorrect This DTC sets in continuous memory and on-demand if the ABS module detects a short to ground or a short to voltage on the actuator motor circuits.
    ABS C2007:11 Right Motor: Circuit Short To Ground This DTC sets in continuous memory and on-demand if the ABS module detects a short to ground or a short to voltage on the actuator motor circuits.
    ABS C2007:12 Right Motor: Circuit Short To Battery This DTC sets in continuous memory and on-demand if the ABS module detects a short to ground or a short to voltage on the actuator motor circuits.
    ABS C2007:13 Right Motor: Circuit Open This DTC sets in continuous memory and on-demand if the ABS module detects a open on the actuator motor circuits.
    ABS C2007:19 Right Motor: Circuit Current Above Threshold This DTC sets in continuous memory and on-demand if the ABS module detects high current during apply of parking brake.
    ABS C2007:29 Right Motor: Signal Invalid This DTC sets in continuous memory and on-demand if the ABS module detects a short to ground or a short to voltage on the actuator motor circuits.
    ABS C2007:1D Right Motor: Circuit Current Out Of Range This DTC sets in continuous memory and on-demand if the ABS module detects a short to ground or a short to voltage on the actuator motor circuits.
    ABS C2007:2B Right Motor: Signal Cross-Coupled This DTC sets in continuous memory and on-demand if the ABS module detects a difference in the current between the positive side and the negative side of the actuator motor.
    ABS C2008:11 Left Motor: Circuit Short To Ground This DTC sets in continuous memory and on-demand if the ABS module detects a short to ground or a short to voltage on the actuator motor circuits.
    ABS C2008:12 Left Motor: Circuit Short To Battery This DTC sets in continuous memory and on-demand if the ABS module detects a short to ground or a short to voltage on the actuator motor circuits.
    ABS C2008:13 Left Motor: Circuit Open This DTC sets in continuous memory and on-demand if the ABS module detects a open on the actuator motor circuits.
    ABS C2008:19 Left Motor: Circuit Current Above Threshold This DTC sets in continuous memory and on-demand if the ABS module detects high current during apply of parking brake.
    ABS C2008:29 Left Motor: Signal Invalid This DTC sets in continuous memory and on-demand if the ABS module detects a short to ground or a short to voltage on the actuator motor circuits.
    ABS C2008:1D Left Motor: Circuit Current Out Of Range This DTC sets in continuous memory and on-demand if the ABS module detects a short to ground or a short to voltage on the actuator motor circuits.
    ABS C2008:2B Left Motor: Signal Cross-Coupled This DTC sets in continuous memory and on-demand if the ABS module detects a difference in the current between the positive side and the negative side of the actuator motor.

    Possible Sources 

    • Automatic release functional requirements not met
    • BCM concern
    • PCM concern
    • Wiring, terminals or connectors
    • Brake caliper
    • Parking brake actuator motor
    • ABS module
    • EPB switch

  2. D1 CHECK FOR ABS (ANTI-LOCK BRAKE SYSTEM) MODULE DIAGNOSTIC TROUBLE CODES (DTCS)

    NOTE: Vehicles with Dual Rear Wheels may have EPB wiring present on vehicle. The EPB system is NOT equipped on these vehicles, but the ABS module may set Diagnostic Trouble Codes (DTCs) for the wiring.
    NOTE: A HS-CAN issue or concern results in a failure to release the parking brake.

    • Ignition ON.

    • Using a diagnostic scan tool, carry out the ABS module self-test.

    Are any of the Diagnostic Trouble Codes (DTCs) listed in the DTC Fault Trigger Conditions table present in the ABS module? 

    Yes  GO to  D4
    No  If there are any "invalid data" or "no communication" Diagnostic Trouble Codes (DTCs) present, GO to the appropriate DTC Chart: ABS Module. If there are no "invalid data" or "no communication" Diagnostic Trouble Codes (DTCs) present, GO to  D2

  3. D2 VERIFY AUTOMATIC RELEASE FUNCTIONALITY

    • With the transmission in PARK, apply the parking brake.

    • Fasten the driver seat belt.

    • Close the driver door.

    • Start the engine.

    • Select DRIVE.

    • NOTE: When the accelerator pedal is pressed, the parking brake releases automatically.

      Press the accelerator pedal until the parking brake releases and the vehicle begins to move.

    Does the parking brake automatically release when the accelerator pedal is pressed? 

    Yes  The system is operating correctly at this time. The concern may have been due to the automatic release functional requirements not being met. EXPLAIN the automatic release functional requirements to the customer. REFER to: Parking Brake - System Operation and Component Description .
    No  GO to  D3

  4. D3 CHECK THE BCM (BODY CONTROL MODULE) AND PCM (POWERTRAIN CONTROL MODULE) FOR DIAGNOSTIC TROUBLE CODES (DTCS)

    • Select PARK.

    • Ignition OFF.

    • Ignition ON.

    • Using a diagnostic scan tool, carry out the BCM self-test.

    • Retrieve and record all BCM Diagnostic Trouble Codes (DTCs).

    • Using a diagnostic scan tool, carry out the PCM self-test.

    • Retrieve and record all PCM Diagnostic Trouble Codes (DTCs).

    Are any Diagnostic Trouble Codes present in the BCM or PCM? 

    Yes  For BCM Diagnostic Trouble Codes (DTCs), REFER to: Body Control Module (BCM) . For PCM Diagnostic Trouble Codes (DTCs), REFER to: Electronic Engine Controls .
    No  GO to  D4

  5. D4 CHECK THE ACTUATOR MOTOR CIRCUITS FOR A SHORT TO VOLTAGE

    NOTE: Performing this step sets Diagnostic Trouble Codes (DTCs) in the ABS module.

    • Ignition OFF.

    • Disconnect ABS module C135.

    • Ignition ON.

    • For the LH actuator motor, measure:
      Positive Lead Measurement / Action Negative Lead
      C4478-1
      GFD564397Courtesy of FORD MOTOR COMPANY
      		 Ground
      C4478-2
      GFD564397Courtesy of FORD MOTOR COMPANY
      		 Ground

    • For the RH actuator motor, measure:
      Positive Lead Measurement / Action Negative Lead
      C4479-1
      GFD564397Courtesy of FORD MOTOR COMPANY
      		 Ground
      C4479-2
      GFD564397Courtesy of FORD MOTOR COMPANY
      		 Ground

    Is any voltage present? 

    Yes  INSPECT the actuator motor jumper harness and connectors for correct routing, damaged connectors, spread terminals, bent or pushed-out pins or any signs of corrosion. INSTALL a new jumper harness as necessary. If the jumper harness is OK, REPAIR the circuit.
    No  GO to  D5

  6. D5 CHECK THE ACTUATOR MOTOR CIRCUITS FOR AN OPEN

    • Ignition OFF.

    • Disconnect the suspect parking brake actuator motor electrical connector.

    • For the LH actuator motor, measure:
      Positive Lead Measurement / Action Negative Lead
      C4478-2
      GFD564396Courtesy of FORD MOTOR COMPANY
      		 C135-13
      C4478-1
      GFD564396Courtesy of FORD MOTOR COMPANY
      		 C135-12

    • For the RH actuator motor, measure:
      Positive Lead Measurement / Action Negative Lead
      C4479-2
      GFD564396Courtesy of FORD MOTOR COMPANY
      		 C135-2
      C4479-1
      GFD564396Courtesy of FORD MOTOR COMPANY
      		 C135-3

    Are the resistances less than 3 ohms? 

    Yes  If DTC C2007:13 or C2008:13 are the only Diagnostic Trouble Codes (DTCs) are present, GO to  D9 If other Diagnostic Trouble Codes (DTCs) are present, GO to  D6
    No  INSPECT the actuator motor jumper harness and connectors for correct routing, damaged connectors, spread terminals, bent or pushed-out pins or any signs of corrosion. INSTALL a new jumper harness as necessary. If the jumper harness is OK, REPAIR the circuit.

  7. D6 CHECK THE ACTUATOR MOTOR CIRCUITS FOR A SHORT TO GROUND

    • For the LH actuator motor, measure:
      Positive Lead Measurement / Action Negative Lead
      C4478-1
      GFD564396Courtesy of FORD MOTOR COMPANY
      		 Ground
      C4478-2
      GFD564396Courtesy of FORD MOTOR COMPANY
      		 Ground

    • For the RH actuator motor, measure:
      Positive Lead Measurement / Action Negative Lead
      C4479-1
      GFD564396Courtesy of FORD MOTOR COMPANY
      		 Ground
      C4479-2
      GFD564396Courtesy of FORD MOTOR COMPANY
      		 Ground

    Are the resistances greater than 10, 000 ohms? 

    Yes  GO to  D7
    No  INSPECT the actuator motor jumper harness and connectors for correct routing, damaged connectors, spread terminals, bent or pushed-out pins or any signs of corrosion. INSTALL a new jumper harness as necessary. If the jumper harness is OK, REPAIR the circuit.

  8. D7 CHECK THE ACTUATOR MOTOR CIRCUITS FOR A SHORT TOGETHER

    • For the LH actuator motor, measure:
      Positive Lead Measurement / Action Negative Lead
      C4478-1
      GFD564396Courtesy of FORD MOTOR COMPANY
      		 C4478-2

    • For the RH actuator motor, measure:
      Positive Lead Measurement / Action Negative Lead
      C4479-1
      GFD564396Courtesy of FORD MOTOR COMPANY
      		 C4479-2

    Is the resistance greater than 10, 000 ohms? 

    Yes  GO to  D8
    No  INSPECT the actuator motor jumper harness and connectors for correct routing, damaged connectors, spread terminals, bent or pushed-out pins or any signs of corrosion. INSTALL a new jumper harness as necessary. If the jumper harness is OK, REPAIR the circuit.

  9. D8 CHECK THE ACTUATOR MOTOR RESISTANCE

    • Ignition OFF.

    • Measure:

      Component Side 

      Positive Lead Measurement / Action Negative Lead
      Suspect Actuator Motor Electrical Connector Pin-1
      GFD564396Courtesy of FORD MOTOR COMPANY
      		 Suspect Actuator Motor Electrical Connector Pin-2

    Is the resistance less than 500 ohms? 

    Yes  GO to  D9
    No  INSTALL a new parking brake actuator motor. Refer to Parking Brake Actuator Motor 

  10. D9 CHECK THE BRAKE CALIPER BALL SCREW DRIVE

    • Ignition OFF.

    • Using a torque wrench, turn the ball screw drive on the brake caliper counterclockwise. It should not take more than 5 Nm (44 lb-in) to turn the ball screw drive.

    Does the ball screw drive turn with less than 5 Nm (44 lb-in) or turning force? 

    Yes  GO to  D10
    No  INSTALL a new brake caliper. REFER to: BRAKE CALIPER - VEHICLES WITH: ELECTRONIC PARKING BRAKE (EPB) .

  11. D10 VERIFY ALL WIRING CONNECTIONS

    • Ignition OFF.

    • Using a good light source, inspect ABS module C135, parking brake actuator motor C4478 or C4479 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  D11
    No  REPAIR the connector or terminals. Refer to OEM CONNECTOR REPAIR PROCEDURES for schematic and connector information.

  12. D11 CHECK FOR CORRECT ABS (ANTI-LOCK BRAKE SYSTEM) MODULE OPERATION

    • Connect ABS module C135. Make sure it seats and latches correctly.

    • Connect the suspect parking brake actuator motor connector. Make sure it seats and latches correctly.

    • Ignition ON.

    • Perform the following steps to restore parking brake switch functionality:

      • Place the switch in the APPLY position.
      • Release the switch to the NEUTRAL position.
      • Place the switch in the RELEASE position.
      • Release the switch to the NEUTRAL position.
      • Repeat the 4 steps.

    • Operate the system and determine if the concern is still present.

    Is the concern still present? 

    Yes  CHECK OASIS for any applicable service articles: TSB, GSB, SSM or FSA. If a service article exists for this concern, DISCONTINUE this test and FOLLOW the service article instructions. If no Technical Service Bulletins (TSBs) exist for this concern, INSTALL a new ABS module. REFER to: Hydraulic Control Unit (HCU) .
    No  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.
scientia non olet · About LEMON Manuals