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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 R: DTC C0031:01; C0034:01; C0037:01 or C003A:01 >> Pinpoint Test R: DTC C0031:01; C0034:01; C0037:01 Or C003A:01

Pinpoint Test R: DTC C0031:01; C0034:01; C0037:01 Or C003A:01

NOTE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.
  1. R1 VERIFY ALL WIRING CONNECTIONS 
    • Disconnect: ABS Module C135.
    • Disconnect: Suspect Wheel Speed Sensor.
    • 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:
      • C135-33
      • C135-34
      • C135-36
      • C135-37
      • C135-42
      • C135-43
      • C135-45
      • C135-46
      • Suspect wheel speed sensor, pin-1
      • Suspect wheel speed sensor, pin-2 (front sensor) or pin-3 (rear sensor)
        Fig 1: Verifying All Wiring Connections
        G08018919Courtesy of FORD MOTOR CO.
    • Refer to CONNECTOR REPAIR PROCEDURES for schematic and connector information.
    • Is each terminal free of corrosion, pushed-out pins or spread terminals? 
      • Yes:  GO to R2.
      • No:  REPAIR the affected terminal(s). CLEAR the DTCs. REPEAT the self-test.
  2. R2 CHECK FOR FAULT REPEATABILITY 
    • Connect: ABS Module C155.
    • Connect: Suspect Wheel Speed Sensor.
    • Connect the scan tool.
    • Ignition ON.
    • Using the scan tool, clear the ABS module DTCs.
    • Drive the vehicle at least 20 km/h (12 mph).
    • Enter the following diagnostic mode on the scan tool: Self Test - ABS Module.
    • Retrieve and record the ABS module DTCs.
    • Are DTCs C0031:01, C0034:01, C0037:01 and/or C003A:01 retrieved? 
      • Yes:  For DTCs C0031:01 and C0034:01, if the Rotunda Active Wheel Speed Sensor Tester is available, GO to R3. If the Rotunda Active Wheel Speed Sensor Tester is not available, GO to  R5.

        For DTCs C0037:01 and C003A:01, GO to  R5.

      • No:  INSPECT the wheel speed sensors, wheel speed sensor wiring and wheel speed sensor tone rings. REPAIR or INSTALL new as necessary. If any other DTCs are retrieved, GO to the ABS Module DTC Chart  .
  3. R3 CHECK THE ABS MODULE OUTPUT USING THE ROTUNDA ACTIVE WHEEL SPEED SENSOR TESTER 
    NOTE: The front wheel speed sensor electrical connectors are located behind the wheel well splash shields. The rear wheel speed sensor electrical connectors are located under the rear seat cushion.
    • Ignition OFF.
    • Disconnect: Suspect Wheel Speed Sensor.
    • Connect the Rotunda Active Wheel Speed Sensor Tester to the wheel speed sensor connectors.
    • Ignition ON.
    • Select the correct system polarity on the Rotunda Active Wheel Speed Sensor Tester and turn the power switch to the ON position.
    • Is the module output LED illuminated? 
      • Yes:  GO to R4.
      • No:  GO to  R7.
  4. R4 CHECK THE WHEEL SPEED SENSOR OUTPUT WITH THE ROTUNDA ACTIVE WHEEL SPEED SENSOR TESTER 
    • Raise the suspect wheel until it can spin freely. Refer to JACKING & LIFTING .
    • While monitoring the Rotunda Active Wheel Speed Sensor Tester, slowly spin the suspect wheel.
    • Do the sensor output LEDs illuminate and flash and is the current overload LED not illuminated? 
      • Yes:  The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. CLEAR the DTCs. REPEAT the self-test.
      • No:  If the current level LED is not illuminated and the sensor output LEDs do not illuminate or if the current level LED is illuminated red, INSTALL a new wheel speed sensor. REFER to WHEEL SPEED SENSOR - FRONT  or WHEEL SPEED SENSOR - REAR, FRONT WHEEL DRIVE (FWD)  . CLEAR the DTCs. REPEAT the self-test.

        If the current level LED is not illuminated and the sensor output LEDs illuminate green, but do not flash, INSPECT the wheel speed sensor tone ring and INSTALL new if necessary. If the tone ring is OK, INSTALL a new wheel speed sensor. REFER to WHEEL SPEED SENSOR - FRONT  or WHEEL SPEED SENSOR - REAR, FRONT WHEEL DRIVE (FWD)  . CLEAR the DTCs. REPEAT the self-test.

  5. R5 CHECK THE WHEEL SPEED SENSOR CIRCUITS FOR A SHORT TO POWER 
    NOTE: No measurements should be taken with the wheel speed sensor connected. Damage to the wheel speed sensor results.
    NOTE: The front wheel speed sensor electrical connectors are located behind the wheel well splash shields. The rear wheel speed sensor electrical connectors are located under the rear seat cushion.
    • Ignition OFF.
    • Disconnect: ABS Module C135.
    • Disconnect: Suspect Wheel Speed Sensor.
    • Ignition ON.
    • For DTC C0031:01 (LF)  , measure the voltage between ground and:
      • ABS module C135-45, circuit VCA03 (VT/WH), harness side.
      • ABS module C135-46, circuit RCA17 (YE), harness side.
        Fig 2: Checking Wheel Speed Sensor Circuits For Short To Power
        G06094498Courtesy of FORD MOTOR CO.
    • For DTC C0034:01 (RF)  , measure the voltage between ground and:
      • ABS module C135-33, circuit RCA19 (VT), harness side.
      • ABS module C135-34, circuit VCA05 (GY/VT), harness side.
        Fig 3: Checking Wheel Speed Sensor Circuits For Short To Power (RF)
        G06094497Courtesy of FORD MOTOR CO.
    • For DTC C0037:01 (LR)  , measure the voltage between ground and:
      • ABS module C135-36, circuit VCA04 (BU/OG), harness side.
      • ABS module C135-37, circuit RCA18 (BN/GN), harness side.
        Fig 4: Checking Wheel Speed Sensor Circuits For Short To Power (LR)
        G06094500Courtesy of FORD MOTOR CO.
    • For DTC C003A:01 (RR)  , measure the voltage between ground and:
      • ABS module C135-42, circuit RCA20 (BN), harness side.
      • ABS module C135-43, circuit VCA06 (WH/OG), harness side.
        Fig 5: Measuring Voltage Between ABS Module C135-43, C135-42 And Ground
        G06094499Courtesy of FORD MOTOR CO.
    • Is any voltage present? 
      • Yes:  REPAIR the affected circuit(s). CLEAR the DTCs. REPEAT the self-test.
      • No:  GO to R6.
  6. R6 CHECK THE WHEEL SPEED SENSOR CIRCUITS FOR A SHORT TO GROUND 
    NOTE: Both circuits must be checked for each DTC.
    • Ignition OFF.
    • For DTC C0031:01 (LF)  , measure the resistance between ground and:
      • ABS module C135-45, circuit VCA03 (VT/WH), harness side.
      • ABS module C135-46, circuit RCA17 (YE), harness side.
        Fig 6: Measuring Resistance Between ABS Module C135-45, C135-46 And Ground
        G06094502Courtesy of FORD MOTOR CO.
    • For DTC C0034:01 (RF)  , measure the resistance between ground and:
      • ABS module C135-34, circuit VCA05 (GY/VT), harness side.
      • ABS module C135-33, circuit RCA19 (VT), harness side.
        Fig 7: Measuring Resistance Between ABS Module C135-34, C135-33 And Ground
        G06094501Courtesy of FORD MOTOR CO.
    • For DTC C0037:01 (LR)  , measure the resistance between ground and:
      • ABS module C135-36, circuit VCA04 (BU/OG), harness side.
      • ABS module C135-37, circuit RCA18 (BN/GN), harness side.
        Fig 8: Measuring Resistance Between ABS Module C135-36, C135-37 And Ground
        G06094504Courtesy of FORD MOTOR CO.
    • For DTC C003A:01 (RR)  , measure the resistance between ground and:
      • ABS module C135-43, circuit VCA06 (WH/OG), harness side.
      • ABS module C135-42, circuit RCA20 (BN), harness side.
        Fig 9: Checking Wheel Speed Sensor Circuits For Short To Ground (RR)
        G06257038Courtesy of FORD MOTOR CO.
    • Are the resistances greater than 10, 000 ohms? 
      • Yes:  GO to R7.
      • No:  REPAIR the affected circuit(s). CLEAR the DTCs. REPEAT the self-test.
  7. R7 CHECK THE WHEEL SPEED CIRCUITS FOR AN OPEN 
    NOTE: The front wheel speed sensor electrical connectors are located behind the wheel well splash shields. The rear wheel speed sensor electrical connectors are located under the rear seat cushion.
    • Ignition OFF.
    • Disconnect: ABS Module C135.
    • Disconnect: Suspect Wheel Speed Sensor.
    • Measure the resistance between ABS module connector C135, harness side and the suspect wheel speed sensor connector, harness side as indicated in the following chart:
      ABS Module Circuit Wheel Speed Sensor
      DTC C0031:01 (LF) 
      C135-45 VCA03 (VT/WH) C150-1
      C135-46 RCA17 (YE) C150-2
      DTC C0034:01 (RF) 
      C135-34 VCA05 (GY/VT) C160-1
      C135-33 RCA19 (VT) C160-2
      DTC C0037:01 (LR) 
      C135-36 VCA04 (BU/OG) C440-3
      C135-37 RCA18 (BN/GN) C440-1
      DTC C003A:01 (RR) 
      C135-43 VCA06 (WH/OG) C426-3
      C135-42 RCA20 (BN) C426-1
      Fig 10: Checking Wheel Speed Sensor Circuits For Open
      G06257040Courtesy of FORD MOTOR CO.
    • Are the resistances less than 5 ohms? 
      • Yes:  GO to R8.
      • No:  REPAIR the affected circuit(s). CLEAR the DTCs. REPEAT the self-test.
  8. R8 CHECK FOR SHORTED WHEEL SPEED SENSOR CIRCUITS 
    • For DTC C0031:01 (LF)  , measure the resistance between:
      • LF wheel speed sensor C150-1, circuit VCA03 (VT/WH), harness side and LF wheel speed sensor C150-2, circuit RCA17 (YE), harness side.
        Fig 11: Checking For Shorted Wheel Speed Sensor Circuits
        G06257041Courtesy of FORD MOTOR CO.
    • For DTC C0034:01 (RF)  , measure the resistance between:
      • RF wheel speed sensor C160-1, circuit VCA05 (GY/VT), harness side and RF wheel speed sensor C160-2, circuit RCA19 (VT), harness side.
        Fig 12: Checking For Shorted Wheel Speed Sensor Circuits (LF)
        G06257041Courtesy of FORD MOTOR CO.
    • For DTC C0037:01 (LR)  , measure the resistance between:
      • LR wheel speed sensor C440-3, circuit VCA04 (BU/OG), harness side and LR wheel speed sensor C440-1, circuit RCA18 (BN/GN), harness side.
        Fig 13: Checking For Shorted Wheel Speed Sensor Circuits (LR)
        G06257044Courtesy of FORD MOTOR CO.
    • For DTC C003A:01 (RR)  , measure the resistance between:
      • RR wheel speed sensor C426-3, circuit VCA06 (WH/OG), harness side and RR wheel speed sensor C426-1, circuit RCA20 (BN), harness side.
        Fig 14: Checking For Shorted Wheel Speed Sensor Circuits (LR)
        G06257044Courtesy of FORD MOTOR CO.
    • Is the resistance greater 10, 000 ohms? 
      • Yes:  GO to R9.
      • No:  REPAIR the affected circuit(s). CLEAR the DTCs. REPEAT the self-test.
  9. R9 CHECK FOR CORRECT ABS MODULE OUTPUT 
    • Connect: ABS Module C135.
    • Ignition ON.
    • For DTC C0031:01 (LF)  , measure the voltage between:
      • LF wheel speed sensor C150-1, circuit VCA03 (VT/WH), harness side and LF wheel speed sensor C150-2, circuit RCA17 (YE), harness side.
        Fig 15: Checking For ABS Module Output (LF)
        G06257045Courtesy of FORD MOTOR CO.
    • For DTC C0034:01 (RF)  , measure the voltage between:
      • RF wheel speed sensor C160-1, circuit VCA05 (GY/VT), harness side and RF wheel speed sensor C160-2, circuit RCA19 (VT), harness side.
        Fig 16: Checking For ABS Module Output (RF)
        G06257045Courtesy of FORD MOTOR CO.
    • For DTC C0037:01 (LR)  , measure the voltage between:
      • LR wheel speed sensor C440-3, circuit VCA04 (BU/OG), harness side and LR wheel speed sensor C440-1, circuit RCA18 (BN/GN), harness side.
        Fig 17: Checking For ABS Module Output (LR)
        G08018869Courtesy of FORD MOTOR CO.
    • For DTC C003A:01 (RR)  , measure the voltage between:
      • RR wheel speed sensor C426-3, circuit VCA06 (WH/OG), harness side and RR wheel speed sensor C426-1, circuit RCA20 (BN), harness side.
        Fig 18: Checking For ABS Module Output (RR)
        G08018869Courtesy of FORD MOTOR CO.
    • Is the voltage greater than 10 volts? 
  10. R10 CHECK FOR CORRECT ABS MODULE OPERATION 
    • Disconnect: ABS Module C135.
    • Check for:
      • corrosion
      • pushed-out pins
      • spread terminals
    • Connect: ABS Module C135.
    • Make sure the connector is seated correctly, then operate the system and verify the concern is still present.
    • Is the concern still present? 
      • Yes:  INSTALL a new ABS module. REFER to ANTI-LOCK BRAKE SYSTEM (ABS) MODULE - HYBRID  . TEST the system for normal operation.
      • No:  The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. CLEAR the DTCs. REPEAT the self-test.
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