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Home >> Ford >> 2012 >> Taurus SEL, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 2985 (Parking Brake System - Parking Brake And Actuation - Vehicles With: Electronic Parking Brake (EPB)) >> Diagnosis And Testing >> Parking Brake >> Pinpoint Tests >> Pinpoint Test D : C2005:77, C2006:77 >> Pinpoint Test D : C2005:77, C2006:77

Pinpoint Test D : C2005:77, C2006:77

WARNING: This page is about a different car, the 2016 Ford F-150. However, it is still accessible from the selected car via links, so may be relevant.

  1. D1 CHECK FOR OTHER EPB (ELECTRIC PARKING BRAKE) MODULE DIAGNOSTIC TROUBLE CODES (DTCS)

    • Ignition ON.
    • Using a diagnostic scan tool, carry out the EPB module self-test.

    Is DTC U3003:16 present? 

    Yes  GO to Pinpoint Test A 
    No  If DTC C2005:77 or C2006:77 is present, GO to  D2
    For all other EPB module Diagnostic Trouble Codes (DTCs), GO to the DTC Chart: Electronic Parking Brake (EPB) Module .

  2. D2 CHECK THE ACTUATOR MOTOR CIRCUITS FOR A SHORT TO GROUND

    • Ignition OFF.
    • Disconnect EPB module C3675 .
    • Disconnect the suspect parking brake actuator motor, C4478 (LH) or C4479 (RH).
    • For the LH actuator motor, measure:
      Positive Lead Measurement / Action Negative Lead
      C4478-1
      GFD38391Courtesy of FORD MOTOR COMPANY
      		 Ground
      C4478-2
      GFD38391Courtesy of FORD MOTOR COMPANY
      		 Ground
    • For the RH actuator motor, measure:
      Positive Lead Measurement / Action Negative Lead
      C4479-1
      GFD38391Courtesy of FORD MOTOR COMPANY
      		 Ground
      C4479-2
      GFD38391Courtesy of FORD MOTOR COMPANY
      		 Ground

    Are the resistances greater than 10, 000 ohms? 

    Yes  GO to  D3
    No  REPAIR the circuit.

  3. D3 CHECK THE ACTUATOR MOTOR CIRCUITS FOR A SHORT TOGETHER

    • For the LH actuator motor, measure:
      Positive Lead Measurement / Action Negative Lead
      C4478-1
      GFD38391Courtesy of FORD MOTOR COMPANY
      		 C4478-2
    • For the RH actuator motor, measure:
      Positive Lead Measurement / Action Negative Lead
      C4479-1
      GFD38391Courtesy of FORD MOTOR COMPANY
      		 C4479-2

    Is the resistance greater than 10, 000 ohms? 

    Yes  GO to  D4
    No  REPAIR the circuit.

  4. D4 CHECK THE ACTUATOR MOTOR CIRCUITS FOR AN OPEN

    • For the LH actuator motor, measure:
      Positive Lead Measurement / Action Negative Lead
      C4478-1
      GFD38391Courtesy of FORD MOTOR COMPANY
      		 C3675-29
      C4478-2
      GFD38391Courtesy of FORD MOTOR COMPANY
      		 C3675-14
    • For the RH actuator motor, measure:
      Positive Lead Measurement / Action Negative Lead
      C4479-1
      GFD38391Courtesy of FORD MOTOR COMPANY
      		 C3675-27
      C4479-2
      GFD38391Courtesy of FORD MOTOR COMPANY
      		 C3675-12

    Are the resistances less than 3 ohms? 

    Yes  GO to  D5
    No  REPAIR the circuit.

  5. D5 CHECK THE ACTUATOR MOTOR CIRCUITS FOR A SHORT TO VOLTAGE

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

    • Ignition ON.
    • For the LH actuator motor, measure:
      Positive Lead Measurement / Action Negative Lead
      C4478-1
      GFD38392Courtesy of FORD MOTOR COMPANY
      		 Ground
      C4478-2
      GFD38392Courtesy of FORD MOTOR COMPANY
      		 Ground
    • For the RH actuator motor, measure:
      Positive Lead Measurement / Action Negative Lead
      C4479-1
      GFD38392Courtesy of FORD MOTOR COMPANY
      		 Ground
      C4479-2
      GFD38392Courtesy of FORD MOTOR COMPANY
      		 Ground

    Is any voltage present? 

    Yes  REPAIR the circuit.
    No  GO to  D6

  6. D6 VERIFY ALL WIRING CONNECTIONS

    • Ignition OFF.
    • Disconnect EPB module C3675 (if not previously disconnected).
    • Disconnect all in-line electrical connectors between the EPB module and the suspect parking brake actuator motor.
    • Using a good light source, inspect EPB module C3675 , the suspect parking brake actuator motor connector and all related in-line 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  D7
    No  REPAIR the connector or terminals. Refer to Connector Repair Procedures for schematic and connector information.

  7. D7 INSPECT THE ACTUATOR MOTOR FOR EVIDENCE OF BRAKE FLUID OR WATER LEAKS

    • Inspect the actuator motor and brake caliper for evidence of brake fluid leaks or water egress.

    Is there any evidence of brake fluid leaks or water egress? 

    Yes  If evidence of water egress is found, IDENTIFY and REPAIR the root cause. If evidence of a break fluid leak is found, INSTALL a new brake caliper and parking brake actuator motor assembly. Refer to: Brake Caliper - Vehicles With: Electronic Parking Brake (EPB) .
    No  GO to  D8

  8. D8 INSPECT THE BRAKE CALIPER FOR BRAKE FLUID LEAKS

    • Clean any dirt or residue from the brake caliper.
    • Apply and release the brake pedal.
    • Inspect the brake caliper for signs of brake fluid leaks.

    Are there any signs of brake fluid leaks? 

    Yes  INSTALL a new rear brake caliper and parking brake actuator motor. Refer to: Brake Caliper - Vehicles With: Electronic Parking Brake (EPB) .
    No  INSTALL a new parking brake actuator motor. Refer to: Parking Brake Actuator Motor .
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