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Home >> Ford >> 2000 >> Contour SE, 2.5 L, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 418 (Anti-Lock Control) >> Diagnosis And Testing >> Anti-Lock Control >> Pinpoint Tests >> PINPOINT TEST G: DTC C1277/C1278 - Steering Wheel Angle 1 and 2 Circuit Failure/Faulted >> Test Procedure

Test Procedure

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.
CAUTION: Use the Flex Probe Kit for all test connections to prevent damage to the wiring terminals. Do not use standard multimeter probes.

  1. G1 - CARRY OUT THE RECALIBRATION PROCEDURE

    • Key in ON position.
    • Enter the following diagnostic mode on the diagnostic tool: Clear the DTC.
    • Carry out the steering wheel rotation sensor recalibration procedure using the diagnostic tool.
    • Follow the diagnostic tool directions for the calibration procedure. REFER to MODULE COMMUNICATIONS NETWORK .
    • Enter the following diagnostic mode on the diagnostic tool: Retrieve DTCs.
    • Are any DTCs retrieved or does the recalibration procedure indicate a fault? 
      1. Yes  : If DTC C1277 or C1278 is retrieved or the recalibration procedure indicates a fault, GO to G2.

        If any other DTC, go to ANTI-LOCK BRAKE SYSTEM (ABS)/TRACTION CONTROL AND ABS/TRACTION CONTROL WITH ADVANCE TRAC®/IVD DIAGNOSTIC TROUBLE CODE (DTC) INDEX .

      2. No  : The ABS system is operating correctly.

        The DTC C1278 was meant for detection of steering wheel rotation sensor harness wiring problems at vehicle assembly time. The steering wheel rotation sensor circuit is checked for swapped wires (channel A and B). This DTC should not occur during repair unless the harness wiring to the steering wheel rotation sensor was changed or the PRNDL position indicator is not operating correctly. The DTC will occur only after driving a few feet and making a turn if the wiring problem or PRNDL problem exists.

  2. G2 - MONITOR THE STEERING ROTATION SENSOR PIDs

    • Key in ON position.
    • Monitor the steering rotation sensor PIDs while rotating the steering wheel clockwise and counterclockwise.
    • Are the two PID values similar? 
      1. Yes  : CLEAR the DTC. DRIVE the vehicle. RETRIEVE the DTCs. If DTC C1277 is present, INSTALL a new ABS control module. RECALIBRATE the ABS module. FOLLOW the diagnostic tool directions for the calibration procedure. REFER to MODULE COMMUNICATIONS NETWORK . REPEAT the self-test.
      2. No  : GO to G3.

  3. G3 - CHECK THE VOLTAGE TO THE STEERING WHEEL ROTATION SENSOR

    • Key in OFF position.
    • Disconnect: Steering Wheel Rotation Sensor C226.
    • Key in ON position.
    • Measure the voltage between steering wheel rotation sensor C226-1 circuit 7-CC16A (YE/BK), harness side, and ground.
      Fig 1: Measuring Voltage Between Steering Wheel Rotation Sensor
      G03200187Courtesy of FORD MOTOR CO.
    • Is the voltage greater than 5 volts? 
      1. Yes  : GO to G4.
      2. No  : REPAIR circuit 7-CC16A (YE/BK). CLEAR the DTC. RECALIBRATE the ABS module. FOLLOW the diagnostic tool directions for the calibration procedure. REFER to MODULE COMMUNICATIONS NETWORK . REPEAT the self-test.

  4. G4 - CHECK THE STEERING WHEEL ROTATION SENSOR CIRCUITRY FOR AN OPEN

    • Key in OFF position.
    • Measure the resistance between ABS module C135 pins, harness side, and steering wheel rotation sensor C226 pins, harness side, as follows:
      STEERING WHEEL ROTATION SENSOR C226 AND ABS MODULE C135 PINS CHART

      Steering Wheel Rotation Sensor C226 Pin Circuit ABS Module C135 Pin Circuit
      2 10-CC17 (GY) 6 10-CC17 (GY)
      3 8-CC18 (WH/RD) 3 8-CC18 (WH/RD)
      4 9-CC1 (BN/YE) 5 9-CC1 (BN/RD)
      Fig 2: Measuring Resistance Between ABS Module C135 Pins And Steering Wheel Rotation Sensor C226 Pins
      G03200188Courtesy of FORD MOTOR CO.
    • Are the resistances less than 5 ohms? 
      1. Yes  : GO to G5.
      2. No  : REPAIR the circuit in question. CLEAR the DTC. RECALIBRATE the ABS module. FOLLOW the diagnostic tool directions for the calibration procedure. REFER to MODULE COMMUNICATIONS NETWORK . REPEAT the self-test.

  5. G5 - CHECK THE STEERING WHEEL ROTATION SENSOR FOR A SHORT TO POWER

    • Key in OFF position.
    • Connect: Steering Wheel Rotation Sensor C226.
    • Disconnect: ABS Module C135.
    • Key in ON position.
    • Measure the voltage between ABS module C135 pins, harness side and ground as follows:
      ABS MODULE C135 CHART

      ABS Module C135 Pin Circuit
      6 10-CC17(GY)
      3 8-CC18(WH/RD)
      5 9-CC1 (BN/RD)
      Fig 3: Measuring Voltage Between ABS Module C135 Pins Harness Side And Ground
      G03200189Courtesy of FORD MOTOR CO.
    • Is voltage present? 
      1. Yes  : REPAIR the circuit in question. CLEAR the DTC. RECALIBRATE the ABS module. FOLLOW the diagnostic tool directions for the calibration procedure. REFER to MODULE COMMUNICATIONS NETWORK . REPEAT the self-test.
      2. No  : GO to G6.

  6. G6 - CHECK THE STEERING WHEEL ROTATION SENSOR CIRCUITRY FOR A SHORT TO GROUND

    • Key in OFF position.
    • Measure the resistance between ABS module C135 pins, harness side, and ground as follows:
      ABS MODULE C135 CHART

      ABS Module C135 Pin Circuit
      6 10-CC17(GY)
      3 8-CC18(WH/RD)
      5 9-CC1 (BN/RD)
      Fig 4: Measuring Resistance Between ABS Module C135 Pins Harness Side And Ground
      G03200190Courtesy of FORD MOTOR CO.
    • Is the resistance greater than 10,000 ohms? 
      1. Yes  : INSTALL a new steering rotation sensor. REFER to STEERING WHEEL ROTATION SENSOR  in this section. CLEAR the DTC. REPEAT the self-test.
      2. No  : REPAIR the circuit in question. CLEAR the DTC. RECALIBRATE the ABS module. FOLLOW the diagnostic tool directions for the calibration procedure. REFER to MODULE COMMUNICATIONS NETWORK . REPEAT the self-test.
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