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Home >> Audi >> 2017 >> A6 Quattro Competition >> Repair and Diagnosis >> External Pages >> Different car >> Section 373 (Anti-Lock Brake System (Abs) And Stability Control) >> Diagnosis And Testing >> Anti-Lock Control >> Pinpoint Tests >> Pinpoint Test D : C1145, C1155, C1165, C1175 >> Pinpoint Test D : C1145, C1155, C1165, C1175

Pinpoint Test D : C1145, C1155, C1165, C1175

WARNING: This page is about a different car, the 2017 Lincoln Navigator and 2017 Ford Expedition. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.
NOTE: If the ignition is set to ON with a wheel speed sensor disconnected, the ABS module disables the output to that sensor. Make sure all test connections are made at the wheel speed sensor connector before setting the ignition to ON.

  1. D1 CHECK FOR FAULT REPEATABILITY

    • Ignition ON.
    • Using the diagnostic scan tool, clear all ABS module DTCs.
    • Drive the vehicle for 2 minutes at speeds above 16 km/h (10 mph).
    • Using the diagnostic scan tool, carry out the ABS module self-test.
    • Retrieve and document all ABS module DTCs.

    Is DTC C1145, C1155, C1165 or C1175 retrieved? 

    Yes  If the Rotunda Active Wheel Speed Sensor Tester is not  available, GO to D4  . If the Rotunda Active Wheel Speed Sensor Tester is  available, GO to D2  .
    No  The system is operating correctly at this time. INSPECT all wheel speed sensor electrical connectors and the ABS module electrical connector. REPAIR or CLEAN the connector as necessary. ADDRESS the root cause of any connector or pin issues. If any other DTCs are retrieved, GO to the DTC Chart: ABS Module .

  2. D2 CHECK THE ABS MODULE OUTPUT USING THE ROTUNDA ACTIVE WHEEL SPEED SENSOR TESTER

    • Ignition OFF.
    • Disconnect the suspect wheel speed sensor.
    • Connect the Rotunda Active Wheel Speed Sensor Tester to the wheel speed sensor connectors.
    • Select the correct system polarity on the Rotunda Active Wheel Speed Sensor Tester and turn the power switch to the ON position.
    • Ignition ON.

    Is the module output LED illuminated? 

    Yes  GO to  D3.
    No  GO to  D6.

  3. D3 CHECK THE WHEEL SPEED SENSOR OUTPUT WITH THE ROTUNDA ACTIVE WHEEL SPEED SENSOR TESTER

    • 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 . If the current level LED is not  illuminated and the sensor output LEDs illuminate green but do not  flash, INSPECT the wheel speed sensor encoder and INSTALL new if necessary. If the encoder is OK, INSTALL a new wheel speed sensor. REFER to Wheel Speed Sensor - Front  or Wheel Speed Sensor - Rear .

  4. D4 CHECK THE WHEEL SPEED SENSOR CIRCUITS FOR A SHORT TO VOLTAGE

    • Ignition OFF.
    • Disconnect the ABS module C135 .
    • Disconnect the suspect wheel speed sensor.
    • Ignition ON.
    • For DTC C1145  , measure:
      Positive Lead Measurement / Action Negative Lead
      C135-6
      GFD134422Courtesy of FORD MOTOR COMPANY
      		 Ground
      C135-18
      GFD134422Courtesy of FORD MOTOR COMPANY
      		 Ground
    • For DTC C1155  , measure:
      Positive Lead Measurement / Action Negative Lead
      C135-21
      GFD134422Courtesy of FORD MOTOR COMPANY
      		 Ground
      C135-34
      GFD134422Courtesy of FORD MOTOR COMPANY
      		 Ground
    • For DTC C1165  , measure:
      Positive Lead Measurement / Action Negative Lead
      C135-19
      GFD134422Courtesy of FORD MOTOR COMPANY
      		 Ground
      C135-31
      GFD134422Courtesy of FORD MOTOR COMPANY
      		 Ground
    • For DTC C1175  , measure:
      Positive Lead Measurement / Action Negative Lead
      C135-20
      GFD134422Courtesy of FORD MOTOR COMPANY
      		 Ground
      C135-33
      GFD134422Courtesy of FORD MOTOR COMPANY
      		 Ground

    Is any voltage present? 

    Yes  REPAIR the circuit.
    No  GO to  D5.

  5. D5 CHECK THE WHEEL SPEED SENSOR CIRCUITS FOR A SHORT TO GROUND

    • Ignition OFF.
    • For DTC C1145  , measure:
      Positive Lead Measurement / Action Negative Lead
      C135-6
      GFD134423Courtesy of FORD MOTOR COMPANY
      		 Ground
      C135-18
      GFD134423Courtesy of FORD MOTOR COMPANY
      		 Ground
    • For DTC C1155  , measure:
      Positive Lead Measurement / Action Negative Lead
      C135-21
      GFD134423Courtesy of FORD MOTOR COMPANY
      		 Ground
      C135-34
      GFD134423Courtesy of FORD MOTOR COMPANY
      		 Ground
    • For DTC C1165  , measure:
      Positive Lead Measurement / Action Negative Lead
      C135-19
      GFD134423Courtesy of FORD MOTOR COMPANY
      		 Ground
      C135-31
      GFD134423Courtesy of FORD MOTOR COMPANY
      		 Ground
    • For DTC C1175  , measure:
      Positive Lead Measurement / Action Negative Lead
      C135-20
      GFD134423Courtesy of FORD MOTOR COMPANY
      		 Ground
      C135-33
      GFD134423Courtesy of FORD MOTOR COMPANY
      		 Ground

    Are the resistances greater than 10, 000 ohms? 

    Yes  GO to  D6.
    No  REPAIR the circuit.

  6. D6 CHECK THE WHEEL SPEED SENSOR CIRCUITS FOR AN OPEN

    • Ignition OFF.
    • Disconnect the ABS module C135 (if not previously disconnected).
    • Disconnect the suspect wheel speed sensor (if not previously disconnected).
    • For DTC C1145  , measure:
      Positive Lead Measurement / Action Negative Lead
      C135-6
      GFD134423Courtesy of FORD MOTOR COMPANY
      		 C160-2
      C135-18
      GFD134423Courtesy of FORD MOTOR COMPANY
      		 C160-1
    • For DTC C1155  , measure:
      Positive Lead Measurement / Action Negative Lead
      C135-21
      GFD134423Courtesy of FORD MOTOR COMPANY
      		 C150-1
      C135-34
      GFD134423Courtesy of FORD MOTOR COMPANY
      		 C150-2
    • For DTC C1165  , measure:
      Positive Lead Measurement / Action Negative Lead
      C135-19
      GFD134423Courtesy of FORD MOTOR COMPANY
      		 C426-1
      C135-31
      GFD134423Courtesy of FORD MOTOR COMPANY
      		 C426-2
    • For DTC C1175  , measure:
      Positive Lead Measurement / Action Negative Lead
      C135-20
      GFD134423Courtesy of FORD MOTOR COMPANY
      		 C440-2
      C135-33
      GFD134423Courtesy of FORD MOTOR COMPANY
      		 C440-1

    Are the resistances less than 3 ohms? 

    Yes  GO to  D7.
    No  REPAIR the circuit.

  7. D7 CHECK FOR WHEEL SPEED SENSOR CIRCUITS SHORTED TOGETHER

    • For DTC C1145  , measure:
      Positive Lead Measurement / Action Negative Lead
      C160-1
      GFD134423Courtesy of FORD MOTOR COMPANY
      		 C160-2
    • For DTC C1155  , measure:
      Positive Lead Measurement / Action Negative Lead
      C150-1
      GFD134423Courtesy of FORD MOTOR COMPANY
      		 C150-2
    • For DTC C1165  , measure:
      Positive Lead Measurement / Action Negative Lead
      C426-1
      GFD134423Courtesy of FORD MOTOR COMPANY
      		 C426-2
    • For DTC C1175  , measure:
      Positive Lead Measurement / Action Negative Lead
      C440-1
      GFD134423Courtesy of FORD MOTOR COMPANY
      		 C440-2

    Are the resistances greater than 10, 000 ohms? 

    Yes  GO to  D8.
    No  REPAIR the circuit.

  8. D8 CHECK THE ABS MODULE OUTPUT

    NOTE: Make sure all test connections are made at the wheel speed sensor before the ignition is set to ON.
    NOTE: Use a meter with a min-max feature or recording capabilities to obtain accurate measurements. The ABS module disables the voltage output immediately if the wheel speed sensor is not present.

    • Ignition OFF.
    • Connect ABS module C135 .
    • Disconnect the suspect wheel speed sensor electrical connector.
    • For DTC C1145  , connect the meter as follows:
      Positive Lead Measurement / Action Negative Lead
      C160-1
      GFD134422Courtesy of FORD MOTOR COMPANY
      		 C160-2
    • For DTC C1155  , connect the meter as follows:
      Positive Lead Measurement / Action Negative Lead
      C150-1
      GFD134422Courtesy of FORD MOTOR COMPANY
      		 C150-2
    • For DTC C1165  , connect the meter as follows:
      Positive Lead Measurement / Action Negative Lead
      C426-1
      GFD134422Courtesy of FORD MOTOR COMPANY
      		 C426-2
    • For DTC C1175  , connect the meter as follows:
      Positive Lead Measurement / Action Negative Lead
      C440-1
      GFD134422Courtesy of FORD MOTOR COMPANY
      		 C440-2
    • Set the meter to measure DC voltage.
    • Set the meter range to greater than 15 volts.
    • Enable the min-max or recording feature.
    • Ignition ON.
    • Check the maximum recorded voltage on the meter.

    Is the maximum recorded voltage greater than 10 volts? 

    Yes  INSTALL a new wheel speed sensor. REFER to Wheel Speed Sensor - Front  or Wheel Speed Sensor - Rear .
    No  GO to  D9.

  9. D9 CHECK FOR CORRECT ABS MODULE OPERATION

    • Ignition OFF.
    • Disconnect and inspect ABS module C135 (if not previously disconnected).
    • Repair:
      • corrosion (install new connector or terminal - clean module pins)
      • damaged or bent pins - install new terminals or pins
      • pushed-out pins - install new pins as necessary
    • Connect ABS module C135 . Make sure it seats and latches correctly.
    • Connect any disconnected wheel speed sensor electrical connectors. Make sure they seat and latch correctly.
    • Operate the system and determine if the concern is still present.

    Is the concern still present? 

    Yes  CHECK OASIS for any applicable TSBs. If a TSB exists for this concern, DISCONTINUE this test and FOLLOW the TSB instructions. If no TSBs address this concern, INSTALL a new ABS module. Anti-Lock Brake System (ABS) Module .
    No  The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. ADDRESS the root cause of any connector or pin issues.
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