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Home >> Lincoln >> 2012 >> MKZ Hybrid >> Repair and Diagnosis (Single Page) >> Brakes >> Traction Control >> Anti-Lock Brake System And Stability Control >> Diagnosis And Testing >> Anti-Lock Control - Hybrid >> Pinpoint Tests >> Pinpoint Test W: DTC C101A:1C, 62, 64 or C101B:1C >> PINPOINT TEST W: C101A:1C, 62, 64 or C101B:1C

PINPOINT TEST W: C101A:1C, 62, 64 or C101B:1C

NOTE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.
  1. W1 VERIFY ALL WIRING CONNECTIONS 
    • Ignition OFF.
    • Disconnect: Vacuum Sensor C1603.
    • Disconnect: ABS Module C135.
    • Using a good light source, inspect each connector terminal for any corrosion.
    • Inspect both connectors for any pushed-out pins. Refer to CONNECTOR REPAIR PROCEDURES for schematic and connector information.
    • Using a suitable mating terminal, check each female terminal for deformed or enlarged contacts by comparing the mating terminal's fit between each of the following pins:
      • C135-6
      • C135-25
      • C135-28
      • C135-30
      • C1603-1
      • C1603-2
      • C1603-3
      • C1603-4
    • Refer to CONNECTOR REPAIR PROCEDURES for schematic and connector information.
      Fig 1: Verifying All Wiring Connections
      G08018970Courtesy of FORD MOTOR CO.
    • Is each terminal free of corrosion, pushed-out pins or spread terminals? 
      • Yes:  GO to W2.
      • No:  REPAIR the affected terminal(s). CLEAR the DTCs. REPEAT the self-test.
  2. W2 CHECK THE DTCs FROM THE ABS MODULE SELF-TEST 
    • Review the DTCs recorded during Inspection and Verification.
    • Are both DTCs C101A:1C and C101B:1C present? 
      • Yes:  GO to  W9.
      • No:  If DTC C101A:1C is present without DTC C101B:1C, GO to W3.

        If DTC C101B:1C is present without DTC C101A:1C, GO to  W6.

        If DTC C101A:64 is present, GO to  W13.

        If only DTC C101A:62 is present, GO to  W11.

        For all other DTCs, GO to the ABS Module DTC Chart  .

  3. W3 CHECK THE SENSOR SIGNAL 1 RETURN CIRCUIT FOR A SHORT TO GROUND 
    • Measure the resistance between vacuum sensor C1603-4, circuit VCA38 (BN/VT), harness side and ground.
      Fig 2: Measuring Resistance Between Vacuum Sensor C1603-4, Circuit VCA38 (BN/VT) And Ground
      G06257149Courtesy of FORD MOTOR CO.
    • Is the resistance greater than 10, 000 ohms? 
      • Yes:  GO to W4.
      • No:  REPAIR circuit VCA38 (BN/VT). CLEAR the DTCs. REPEAT the self-test.
  4. W4 CHECK THE SENSOR SIGNAL 1 RETURN CIRCUIT FOR A SHORT TO VOLTAGE 
    • Ignition ON.
    • Measure the voltage between vacuum sensor C1603-4, circuit VCA38 (BN/VT), harness side and ground.
      Fig 3: Measuring Voltage Between Vacuum Sensor C1603-4, Circuit VCA38 (BN/VT) And Ground
      G06257153Courtesy of FORD MOTOR CO.
    • Is any voltage present? 
      • Yes:  REPAIR circuit VCA38 (BN/VT). CLEAR the DTCs. REPEAT the self-test.
      • No:  GO to W5.
  5. W5 CHECK THE SENSOR SIGNAL 1 RETURN CIRCUIT FOR AN OPEN 
    • Ignition OFF.
    • Measure the resistance between vacuum sensor C1603-4, circuit VCA38 (BN/VT), harness side and ABS module C135-30, circuit VCA38 (BN/VT), harness side.
      Fig 4: Measuring Resistance Between Vacuum Sensor C1603-4 And ABS Module C135-30, Circuit VCA38 (BN/VT)
      G08018973Courtesy of FORD MOTOR CO.
    • Is the resistance less than 5 ohms? 
      • Yes:  GO to  W9.
      • No:  REPAIR circuit VCA38 (BN/VT). CLEAR the DTCs. REPEAT the self-test.
  6. W6 CHECK THE SENSOR SIGNAL 2 RETURN CIRCUIT FOR A SHORT TO GROUND 
    • Measure the resistance between vacuum sensor C1603-1, circuit VCA39 (BU/GN), harness side and ground.
      Fig 5: Measuring Resistance Between Vacuum Sensor C1603-1, Circuit VCA39 (BU/GN) And Ground
      G06257152Courtesy of FORD MOTOR CO.
    • Is the resistance greater than 10, 000 ohms? 
      • Yes:  GO to W7.
      • No:  REPAIR circuit VCA39 (BU/GN). CLEAR the DTCs. REPEAT the self-test.
  7. W7 CHECK THE SENSOR SIGNAL 2 RETURN CIRCUIT FOR A SHORT TO VOLTAGE 
    • Ignition ON.
    • Measure the voltage between vacuum sensor C1603-1, circuit VCA39 (BU/GN), harness side and ground.
      Fig 6: Measuring Voltage Between Vacuum Sensor C1603-1, Circuit VCA39 (BU/GN) And Ground
      G08018975Courtesy of FORD MOTOR CO.
    • Is any voltage present? 
      • Yes:  REPAIR circuit VCA39 (BU/GN). CLEAR the DTCs. REPEAT the self-test.
      • No:  GO to W8.
  8. W8 CHECK THE SENSOR SIGNAL 2 RETURN CIRCUIT FOR AN OPEN 
    • Ignition OFF.
    • Measure the resistance between vacuum sensor C1603-1, circuit VCA39 (BU/GN), harness side and ABS module C135-25, circuit VCA39 (BU/GN), harness side.
      Fig 7: Measuring Resistance Between Vacuum Sensor C1603-1 And ABS Module C135-25, Circuit VCA39 (BU/GN)
      G08018976Courtesy of FORD MOTOR CO.
    • Is the resistance less than 5 ohms? 
      • Yes:  GO to W9.
      • No:  REPAIR circuit VCA39 (BU/GN). CLEAR the DTCs. REPEAT the self-test.
  9. W9 CHECK THE SENSOR VOLTAGE SUPPLY CIRCUIT FOR A SHORT TO GROUND 
    • Measure the resistance between vacuum sensor C1603-3, circuit LCA37 (YE/OG), harness side and ground.
      Fig 8: Measuring Resistance Between Vacuum Sensor C1603-3, Circuit LCA37 (YE/OG) And Ground
      G06257155Courtesy of FORD MOTOR CO.
    • Is the resistance greater than 10, 000 ohms? 
      • Yes:  GO to W10.
      • No:  REPAIR circuit LCA37 (YE/OG). CLEAR the DTCs. REPEAT the self-test.
  10. W10 CHECK THE SENSOR VOLTAGE SUPPLY AND GROUND CIRCUITS FOR A SHORT TO VOLTAGE 
    • Ignition ON.
    • Measure the voltage between ground and:
      • C1603-3, circuit LCA37 (YE/OG), harness side.
      • C1603-2, circuit RCA37 (WH/BU), harness side.
        Fig 9: Checking Sensor Voltage Supply And Ground Circuits For Short To Voltage
        G08018978Courtesy of FORD MOTOR CO.
    • Is any voltage present? 
      • Yes:  REPAIR the affected circuit(s). CLEAR the DTCs. REPEAT the self-test.
      • No:  GO to W11.
  11. W11 CHECK THE SENSOR VOLTAGE SUPPLY AND GROUND CIRCUITS FOR AN OPEN 
    • Ignition OFF.
    • Measure the resistance between ABS module C135, harness side and vacuum sensor C1603, harness side as indicated in the following chart:
      ABS Module Circuit Vacuum Sensor
      C135-6 LCA37 (YE/OG) C1603-3
      C135-28 RCA37 (WH/BU) C1603-2
      Fig 10: Checking Sensor Voltage Supply And Ground Circuits For Open
      G06257157Courtesy of FORD MOTOR CO.
    • Are the resistances less than 5 ohms? 
      • Yes:  If only DTC C101A:62 is present, GO to W12.

        For all other DTCs, GO to  W13.

      • No:  REPAIR the affected circuit(s). CLEAR the DTCs. REPEAT the self-test.
  12. W12 CHECK BOTH SENSOR SIGNAL RETURN CIRCUITS FOR AN OPEN 
    • Measure the resistance between ABS module C135, harness side and vacuum sensor C1603, harness side as indicated in the following chart:
      ABS Module Circuit Vacuum Sensor
      C135-30 VCA38 (BN/VT) C1603-4
      C135-25 VCA39 (BU/GN) C1603-1
      Fig 11: Checking Sensor Voltage Supply And Ground Circuits For Open
      G06257157Courtesy of FORD MOTOR CO.
    • Are the resistances less than 5 ohms? 
      • Yes:  GO to W13.
      • No:  REPAIR the affected circuit(s). CLEAR the DTCs. REPEAT the self-test.
  13. W13 CHECK BOTH SENSOR SIGNAL RETURN CIRCUITS FOR A SHORT TOGETHER 
    • Measure the resistance between vacuum sensor C1603-1, circuit VCA39 (BU/GN), harness side and ABS module C1603-4, circuit VCA38 (BN/VT), harness side.
      Fig 12: Measuring Resistance Between Vacuum Sensor C1603-1, Circuit VCA39 (BU/GN) And ABS Module C1603-4, Circuit VCA38 (BN/VT)
      G06257159Courtesy of FORD MOTOR CO.
    • Is the resistance greater than 10, 000 ohms? 
      • Yes:  GO to W14.
      • No:  REPAIR the affected circuit(s). CLEAR the DTCs. REPEAT the self-test.
  14. W14 CHECK ABS MODULE OUTPUT 
    • Connect: ABS Module C135.
    • Ignition ON.
    • Measure the voltage between vacuum sensor C1603-3, circuit LCA37 (YE/OG) and ground.
      Fig 13: Measuring Voltage Between Vacuum Sensor C1603-3, Circuit LCA37 (YE/OG) And Ground
      G06257160Courtesy of FORD MOTOR CO.
    • Is the voltage between 4.7 and 5.1 volts? 
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