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Pinpoint Test J: DTC C1996

WARNING: This page is about a different car, the 2010 Mercury Milan, 2010 Lincoln MKZ, and 2010 Ford Fusion. However, it is still accessible from the selected car via links, so may be relevant.
  1. J1 CHECK FOR ABS MODULE DTCs 
  2. J2 CHECK RETURNING DTCs 
    • Connect the scan tool.
    • Ignition ON.
    • Using the scan tool, clear all ABS module DTCs.
    • Cycle the ignition switch from RUN to OFF and back to RUN.
    • Test drive the vehicle above 49 km/h (30 mph).
    • Enter the following diagnostic mode on the scan tool: Self Test - ABS Module.
    • Are any ABS module DTCs present? 
    • Yes:  If only  DTC C1996 is present, GO to  J3.

      If DTC C1996 is present along with other DTCs, REPAIR the other DTCs before repairing DTC C1996. GO to ABS MODULE DTC TABLE .

    • No:  The condition is not present at this time.
  3. J3 CHECK THE WHEEL SPEED SENSOR PIDs 
    • Connect the scan tool.
    • Ignition ON.
    • Enter the following diagnostic mode on the scan tool: DataLogger - ABS Module.
    • While driving the vehicle, have an assistant monitor the following wheel speed sensor PIDs:
      • Left Front Wheel Speed Sensor (LF_WSPD)
      • Right Front Wheel Speed Sensor (RF_WSPD)
      • Left Rear Wheel Speed Sensor (LR_WSPD)
      • Right Rear Wheel Speed Sensor (RR_WSPD)
    • Do all the PIDs match the vehicle speed and match each other? 
    • Yes:  GO to  J8.
    • No:  GO to  J4.
  4. J4 INSPECT THE WHEEL SPEED SENSOR MOUNTING 
    • Ignition OFF.
    • With the vehicle in NEUTRAL, position it on a hoist. Refer to JACKING & LIFTING .
    • Verify the bolt of the suspect wheel speed sensor is tightened to specifications.
    • Is the bolt tightened to specifications? 
    • Yes:  GO to  J5.
    • No:  TIGHTEN the wheel speed sensor bolt to specification. REFER to SPECIFICATIONS . CLEAR the DTCs.
  5. J5 INSPECT THE WHEEL SPEED SENSOR AND HARNESS FOR DAMAGE 
    • Inspect the suspect wheel speed sensor and harness for cuts, broken tabs, broken casing and/or corrosion.
      NOTE: Examine the wheel speed sensor harness carefully with a good light source. Failure to verify damage in the sensor harness can lead to unnecessary installation of a new component.
    • Are the wheel speed sensor and harness OK? 
  6. J6 INSPECT THE WHEEL SPEED SENSOR RING FOR DAMAGE 
    • Inspect the suspect wheel speed sensor ring for cracks, chips or missing teeth. Rotate the wheel to verify that no teeth are missing.
      NOTE: Examine the wheel speed sensor ring carefully with a good light source. Failure to verify damage in the sensor ring can lead to unnecessary installation of a new component.
    • Is the wheel speed sensor ring OK? 
    • Yes:  GO to  J7.
    • No:  INSTALL a new wheel hub and bearing assembly (wheel speed sensor rings are part of the wheel hub and bearing assembly). Refer to INSTALLATION for the procedure. CLEAR the DTCs. REPEAT the self-test.
  7. J7 INSPECT THE WHEEL BEARING FOR DAMAGE AND LOOSENESS 
    • Verify that the wheel bearing has no end-play and is undamaged.
    • Is the wheel bearing OK? 
  8. J8 CHECK THE ABS MODULE YAW RATE (YAWRATE) PID 
    • Monitor the YAWRATE PID.
      NOTE: The vehicle must be on level ground and at a complete standstill. Any vehicle movement results in false values for this test.
    • Is the YAWRATE PID value between -0.05 and 0.05? 
    • Yes:  GO to  J9.
    • No:  GO to  J11.
  9. J9 CHECK THE ABS MODULE LATERAL ACCELERATION (LAT_ACCL) PID 
    • Monitor the LAT_ACCL PID.
      NOTE: The vehicle must be on level ground and at a complete standstill. Any vehicle movement results in false values for this test.
    • Is the LAT_ACCL PID value between -0.4 and 0.4? 
    • Yes:  If the vehicle is equipped with All-Wheel Drive (AWD), GO to  J10.

      For all other vehicles, GO to  J12.

    • No:  GO to  J11.
  10. J10 CHECK THE ABS MODULE LONGITUDINAL ACCELERATION (LONG_ACCL) PID 
    • Monitor the LONG_ACCL PID.
      NOTE: The vehicle must be on level ground and at a complete standstill. Any vehicle movement results in false values for this test.
    • Is the LONG_ACCL PID value between -0.4 and 0.4? 
    • Yes:  GO to  J12.
    • No:  GO to  J11.
  11. J11 CHECK THE RCM INSTALLATION AND MOUNTING SURFACE 
    • Ignition OFF.
      WARNING: Turn the ignition OFF and wait one minute to deplete the backup power supply. Failure to follow this instruction may result in serious personal injury or death in the event of an accidental deployment.
    • Gain access to the RCM and inspect the RCM installation. Make sure that the nuts are fully seated and tightened correctly. Refer to RESTRAINTS CONTROL MODULE (RCM) .
    • Inspect the mounting surface for damage, corrosion or dirt.
    • Is the RCM installed correctly and is the mounting surface clean and free from damage? 
    • Yes:  GO to  J13.
    • No:  REPAIR, REINSTALL or INSTALL new as necessary. CLEAR the DTC. REPEAT the self-test.
  12. J12 CHECK THE STEERING WHEEL ANGLE SENSOR POSITION (SWA POS) PID 
    NOTE: For all vehicles except  those with a 3.5L engine, the steering wheel angle information is sent to the ABS module from the PSCM over the HS-CAN bus.
    • Monitor the SWA POS PID while rotating the steering wheel clockwise and counterclockwise very slowly, from lock to lock.
    • Does the PID change in intervals of 1.5 degrees on vehicles with a 3.5L engine (intervals of 0.05-0.25 degrees on all other vehicles) and show a 360-degree increase for each complete revolution of the steering wheel? 
    • Yes:  GO to  J13.
    • No:  For vehicles equipped with a 3.5L engine, INSTALL a new steering wheel rotation sensor. REFER to Removal and Installation . CLEAR the DTCs. REPEAT the self-test.

      For all other vehicles, CARRY OUT a self-test of the PSCM. REFER to STEERING SYSTEM .

  13. J13 CHECK FOR CORRECT ABS MODULE OPERATION 
    • Disconnect: ABS Module C155.
    • Check the connector for:
      • corrosion.
      • pushed-out pins.
      • spread terminals.
    • Connect: ABS Module C155.
    • Make sure the ABS module electrical connector is fully seated, then operate the system and verify the concern is still present.
    • Is the concern still present? 
    • Yes:  INSTALL a new ABS module. REFER to Removal and Installation . CLEAR the DTCs. REPEAT the self-test.
    • 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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