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Pinpoint Test R: The Electronic Parking Brake Module Does Not Respond To The Diagnostic Tool

WARNING: This page is about a different car, the 2004 Lincoln LS. However, it is still accessible from the selected car via links, so may be relevant.

Test Step 

  1. R1 CHECK THE ELECTRONIC PARKING BRAKE MODULE C4205b FOR DAMAGE 
    • Key in OFF position.
    • Disconnect: Electronic Parking Brake Module C4205b.
    • Inspect the electronic parking brake module C4205b for damage.
    • Is the electronic parking brake module C4205b OK? 

    Result / Action to Take 

    1. Yes  : GO to R2.
    2. No  : REPAIR the electronic parking brake module C4205b as necessary. TEST the system for normal operation.
  2. R2 CHECK FOR AN OPEN BETWEEN THE DLC C251 AND THE ELECTRONIC PARKING BRAKE MODULE C4205b 
    • Measure the resistance between the electronic parking brake module C4205b-1, circuit 4-CG16 (GY/RD), harness side and the DLC C251-2, circuit 4-EG7 (GY/RD), harness side.
      Fig 1: Checking For Open Between DLC C251 And Electronic Parking Brake Module C4205B (1 Of 2)
      G03203180Courtesy of FORD MOTOR CO.
    • Measure the resistance between the electronic parking brake module C4205b-7, circuit 5-CG16 (BU/RD), harness side and the DLC C251-10, circuit 5-EG7 (BU/RD), harness side.
      Fig 2: Checking For Open Between DLC C251 And Electronic Parking Brake Module C4205B (2 Of 2)
      G03203181Courtesy of FORD MOTOR CO.
    • Are the resistances less than 5 ohms? 
    1. Yes  : GO to  R9.
    2. No  : GO to R3.
  3. R3 CHECK FOR AN OPEN BETWEEN JOINT CONNECTOR No. 5 C427 AND THE ELECTRONIC PARKING BRAKE MODULE C4205b 
    • Disconnect: Joint Connector No. 5 C427.
    • Measure the resistance between the electronic parking brake module C4205b-1, circuit 4-CG16 (GY/RD), harness side and joint connector No. 5 C427-2, circuit 4-CG16 (GY/RD), harness side.
      Fig 3: Checking For Open Between Joint Connector No. 5 C427 And Electronic Parking Brake Module C4205B (1 Of 2)
      G03203182Courtesy of FORD MOTOR CO.
    • Measure the resistance between the electronic parking brake module C4205b-7, circuit 5-CG16 (BU/RD), harness side and joint connector No. 5 C427-13, circuit 5 -CG16 (BU/RD), harness side.
      Fig 4: Checking For Open Between Joint Connector No. 5 C427 And Electronic Parking Brake Module C4205B (2 Of 2)
      G03203183Courtesy of FORD MOTOR CO.
    • Are the resistances less than 5 ohms? 
    1. Yes  : GO to R4.
    2. No  : REPAIR the circuit in question. TEST the system for normal operation.
  4. R4 CHECK JOINT CONNECTOR No. 5 FOR AN OPEN 
    • Measure the resistance between joint connector No. 5 C427-1, component side and joint connector No. 5 C427-2, component side.
      Fig 5: Checking Joint Connector No. 5 For Open (1 Of 2)
      G03203184Courtesy of FORD MOTOR CO.
    • Measure the resistance between joint connector No. 5 C427-12, component side and joint connector No. 5 C427-13, component side.
      Fig 6: Checking Joint Connector No. 5 For Open (2 Of 2)
      G03203185Courtesy of FORD MOTOR CO.
    • Are the resistances less than 5 ohms? 
    1. Yes  : GO to R5.
    2. No  : REPAIR joint connector No. 5 C427 as necessary. TEST the system for normal operation.
  5. R5 CHECK FOR AN OPEN BETWEEN THE INTERIOR AJB C283b AND JOINT CONNECTOR No. 5 C427 
    • Disconnect: Interior AJB C283b.
    • Measure the resistance between the interior AJB C283b-8, circuit 4-EG1 (GY/RD), harness side and joint connector No. 5 C427-1, circuit 4-EG1 (GY/RD), harness side.
      Fig 7: Checking For Open Between Interior AJB C283B And Joint Connector No. 5 C427 (1 Of 2)
      G03203186Courtesy of FORD MOTOR CO.
    • Measure the resistance between the interior AJB C283b-4, circuit 5-EG1 (BU/RD), harness side and joint connector No. 5 C427-12, circuit 5-EG1 (BU/RD), harness side.
      Fig 8: Checking For Open Between Interior AJB C283B And Joint Connector No. 5 C427 (2 Of 2)
      G03203187Courtesy of FORD MOTOR CO.
    • Are the resistances less than 5 ohms? 
    1. Yes  : GO to R6.
    2. No  : REPAIR the circuit in question. CARRY OUT the PINPOINT TEST PC: data link diagnostics network test .
  6. R6 CHECK FOR AN OPEN BETWEEN THE INTERIOR AJB C283b AND THE INTERIOR AJB C283d 
    • Disconnect: Interior AJB C283d.
    • Measure the resistance between the interior AJB C283d-16, component side and the interior AJB C283b-8, component side.
      Fig 9: Checking For Open Between Interior AJB C283B And Interior AJB C283D (1 Of 2)
      G03203188Courtesy of FORD MOTOR CO.
    • Measure the resistance between the interior AJB C283d-12, component side and the interior AJB C283b-4, component side.
      Fig 10: Checking For Open Between Interior AJB C283B And Interior AJB C283D (2 Of 2)
      G03203189Courtesy of FORD MOTOR CO.
    • Are the resistances less than 5 ohms? 
    1. Yes  : GO to R7.
    2. No  : INSTALL a new interior AJB. TEST the system for normal operation.
  7. R7 CHECK FOR AN OPEN BETWEEN THE INTERIOR AJB C283d AND JOINT CONNECTOR No. 4 C223 
    • Disconnect: Interior Joint Connector No. 4 C223.
    • Measure the resistance between the interior AJB C283d-16, circuit 4-EG1 (GY/RD), harness side and joint connector No. 4 C223-12, circuit 4-EG1 (GY/RD), harness side.
      Fig 11: Checking For Open Between Interior AJB C283D And Joint Connector No. 4 C223 (1 Of 2)
      G03203190Courtesy of FORD MOTOR CO.
    • Measure the resistance between the interior AJB C283d-12, circuit 5-EG1 (BU/RD), harness side and joint connector No. 4 C223-11, circuit 5-EG1 (BU/RD), harness side.
      Fig 12: Checking For Open Between Interior AJB C283D And Joint Connector No. 4 C223 (2 Of 2)
      G03203191Courtesy of FORD MOTOR CO.
    • Are the resistances less than 5 ohms? 
    1. Yes  : GO to R8.
    2. No  : REPAIR the circuit in question. CARRY OUT the PINPOINT TEST PC: data link diagnostics network test .
  8. R8 CHECK JOINT CONNECTOR No. 4 FOR AN OPEN 
    • Measure the resistance between joint connector No. 4 C223-12, component side and joint connector No. 4 C223-14, component side.
      Fig 13: Checking Joint Connector No. 4 For Open (1 Of 2)
      G03203192Courtesy of FORD MOTOR CO.
    • Measure the resistance between joint connector No. 4 C223-9, component side and joint connector No. 4 C223-11, component side.
      Fig 14: Checking Joint Connector No. 4 For Open (2 Of 2)
      G03203193Courtesy of FORD MOTOR CO.
    • Are the resistances less than 5 ohms? 
    1. Yes  : REPAIR the circuit in question between the DLC C251 and joint connector No. 4 C223. CARRY OUT the PINPOINT TEST PC: data link diagnostics network test .
    2. No  : REPAIR joint connector No. 4 C223. TEST the system for normal operation.
  9. R9 CHECK FOR CORRECT ELECTRONIC PARKING BRAKE MODULE OPERATION 
    • Disconnect all the electronic parking brake module connectors.
    • Check for:
      • corrosion
      • push-out pins
    • Connect all the electronic parking brake module connectors and make sure they seat correctly.
    • Operate the system and verify the concern is still present.
    • Is the concern still present? 
    1. Yes  : INSTALL a new electronic parking brake module. REFER to BRAKE SYSTEM . TEST the system for normal operation.

      CARRY OUT the PINPOINT TEST PC: data link diagnostics network test .

    2. No  : The system is operating correctly at this time. Concern may have been caused by a loose or corroded connector. CLEAR the DTCs. REPEAT the self-test.
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