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Home >> Ford >> 2000 >> Contour SE, 2.5 L, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 2075 (Anti-Lock Brake System) >> Diagnostic Tests >> Anti-Lock Control >> Pinpoint Tests >> Pinpoint Test C: DTCs C1145, C1155, C1165 and C1175 - Wheel Speed Sensor Input Circuit Failure >> PINPOINT TEST C: DTCs C1145, C1155, C1165 AND C1175 - WHEEL SPEED SENSOR INPUT CIRCUIT FAILURE

PINPOINT TEST C: DTCs C1145, C1155, C1165 AND C1175 - WHEEL SPEED SENSOR INPUT CIRCUIT FAILURE

WARNING: This page is about a different car, the 2007 Mercury Mariner and 2007 Ford Escape. 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. C1 CHECK FOR FAULT REPEATABILITY 
    • Connect the diagnostic tool.
    • Key in ON position.
    • Enter the following diagnostic mode on the diagnostic tool: Clear the Continuous DTCs
    • Drive the vehicle at least 16 km/h (10 mph).
    • Retrieve and document continuous DTCs.
    • Is DTC C1145, C1155, C1165 or C1175 retrieved? 
    1. YES  : If the active wheel speed sensor tool is available, go to  C2. If the active wheel speed sensor tool is not available, go to  C4.
    2. 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 Anti-Lock Brake System (ABS) Module Diagnostic Trouble Code (DTC) Chart.
  2. C2 CHECK THE ABS MODULE OUTPUT USING THE SPECIAL TOOL 
    • Key in OFF position.
    • Disconnect: Suspect Wheel Speed Sensor
    • Connect the special tool to the wheel speed sensor connectors.
    • Key in ON position.
    • Select the correct system polarity on the special tool and turn the special tool power switch to the ON position.
    • Is the module output LED illuminated? 
    1. YES  : Go to  C3.
    2. NO  : Go to  C6.
  3. C3 CHECK THE WHEEL SPEED SENSOR OUTPUT WITH THE SPECIAL TOOL 
    • Raise the suspect wheel until it can spin freely. Refer to JACKING AND LIFTING article.
    • While monitoring the special tool, slowly spin the suspect wheel.
    • Do the sensor output LEDs illuminate and flash and is the current overload LED not illuminated?  
    1. 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.
    2. 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. For the front wheel speed sensor, REFER to Wheel Speed Sensor - Front . For the front wheel speed sensor, REFER to Wheel Speed Sensor - Rear . 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. For the front wheel speed sensor, REFER to Wheel Speed Sensor - Front . For the front wheel speed sensor, REFER to Wheel Speed Sensor - Rear . CLEAR the DTCs. REPEAT the self-test.

  4. C4 CHECK THE WHEEL SPEED SENSOR CIRCUITS FOR A SHORT TO POWER  
    CAUTION: No measurements should be taken with the wheel speed sensor connected. Damage to the wheel speed sensor will result.
    NOTE: Both circuits must be checked for each DTC.
    • Key in OFF position.
    • For vehicles equipped with a 3.0L engine,  with the vehicle in NEUTRAL, position it on a hoist. Refer to JACKING AND LIFTING article.
    • Disconnect: ABS Module C155
    • Disconnect: Suspect Wheel Speed Sensor
    • Key in ON position.
    • For DTC C1145,  measure the voltage between ground and:
      • ABS module C155-33, circuit 516 (YE/BK), harness side.
      • ABS module C155-34, circuit 514 (YE/RD), harness side.
    • For DTC C1155,  measure the voltage between ground and:
      • BS module C155-45, circuit 521 (TN/OG), harness side.
      • BS module C155-46, circuit 522 (TN/BK), harness side.
    • For DTC C1165,  measure the voltage between ground and:
      • ABS module C155-42, circuit 524 (PK/BK), harness side.
      • ABS module C155-43, circuit 523 (RD/PK), harness side.
    • For DTC C1175,  measure the voltage between ground and:
      • ABS module C155-36, circuit 518 (LG/RD), harness side.
      • ABS module C155-37, circuit 519 (LG/BK), harness side.
    • Is voltage present? 
    1. YES  : REPAIR the affected circuit(s). CLEAR the DTCs. REPEAT the self-test.
    2. NO  : Go to  C5.
  5. C5 CHECK THE WHEEL SPEED SENSOR CIRCUITS FOR A SHORT TO GROUND 
    NOTE: Both circuits must be checked for each DTC.
    • Key in OFF position.
    • For DTC C1145,  measure the resistance between ground and:
      • ABS module C155-33, circuit 516 (YE/BK), harness side.
      • ABS module C155-34, circuit 514 (YE/RD), harness side.
    • For DTC C1155,  measure the resistance between ground and:
      • ABS module C155-45, circuit 521 (TN/OG), harness side.
      • ABS module C155-46, circuit 522 (TN/BK), harness side.
    • For DTC C1165,  measure the resistance between ground and:
      • ABS module C155-42, circuit 524 (PK/BK), harness side.
      • ABS module C155-43, circuit 523 (RD/PK), harness side.
    • For DTC C1175,  measure the resistance between ground and:
      • ABS module C155-36, circuit 518 (LG/RD), harness side.
      • ABS module C155-37, circuit 519 (LG/BK), harness side.
    • Are the resistances greater than 10,000 ohms? 
    1. YES  : Go to  C6.
    2. NO  : REPAIR the affected circuit(s). CLEAR the DTCs. REPEAT the self-test.
  6. C6 CHECK THE WHEEL SPEED SENSOR CIRCUITS FOR AN OPEN 
    NOTE: Both circuits must be checked for each DTC.
    • Key in OFF position.
    • Disconnect: ABS Module C155
    • Disconnect: Suspect Wheel Speed Sensor
    • For DTC C1145,  measure the resistance between:
      • ABS module C155-33, circuit 516 (YE/BK), harness side and RH front wheel speed sensor C160-1, circuit 516 (YE/BK), harness side.
      • ABS module C155-34, circuit 514 (YE/RD), harness side and RH front wheel speed sensor C160-2, circuit 514 (YE/RD), harness side.
    • For DTC C1155,  measure the resistance between:
      • ABS module C155-45, circuit 521 (TN/OG), harness side and LH front wheel speed sensor C150-2, circuit 521 (TN/OG), harness side.
      • ABS module C155-46, circuit 522 (TN/BK), harness side and LH front wheel speed sensor C150-1, circuit 522 (TN/BK), harness side.
    • For DTC C1165,  measure the resistance between:
      • ABS module C155-42, circuit 524 (PK/BK), harness side and RH rear wheel speed sensor C426-2, circuit 524 (PK/BK), harness side.
      • ABS module C155-43, circuit 523 (RD/PK), harness side and RH rear wheel speed sensor C426-1, circuit 523 (RD/PK), harness side.
    • For DTC C1175,  measure the resistance between:
      • ABS module C155-36, circuit 518 (LG/RD), harness side and LH rear wheel speed sensor C440-1, circuit 518 (LG/RD), harness side.
      • ABS module C155-37, circuit 519 (LG/BK), harness side and LH rear wheel speed sensor C440-2, circuit 519 (LG/BK), harness side.
    • Are the resistances less than 5 ohms? 
    1. YES  : Go to  C7.
    2. NO  : REPAIR the affected circuit(s). CLEAR the DTCs. REPEAT the self-test.
  7. C7 CHECK FOR SHORTED WHEEL SPEED SENSOR CIRCUITS 
      Fig 1: Checking Circuits For Short Together
      GF0024666Courtesy of FORD MOTOR CO.
    • Measure the resistance between the suspect wheel speed sensor pins, harness side.
    • Is the resistance greater than 10,000 ohms? 
    1. YES  : Go to  C8.
    2. NO  : REPAIR the affected circuit(s). CLEAR the DTCs. REPEAT the self-test.
  8. C8 CHECK THE ABS MODULE OUTPUT 
    • Connect: ABS Module C155
    • Key in ON position.
      • Fig 2: Checking Circuit For Voltage
      GF0024667Courtesy of FORD MOTOR CO.
    • Measure the voltage between the suspect wheel speed sensor pins, harness side.
    • Is the voltage greater than 10 volts? 
    1. YES  : INSTALL a new wheel speed sensor. REFER to Wheel Speed Sensor - Front  or Wheel Speed Sensor - Rear . CLEAR the DTCs. REPEAT the self-test.
    2. NO  : Go to  C9.
  9. C9 CHECK FOR CORRECT ABS MODULE OPERATION 
    • Disconnect the ABS connector.
    • Check for:
      • corrosion.
      • pushed-out pins.
      • spread terminals.
    • Connect the ABS connector and make sure it is seated correctly.
    • Operate the system and verify the concern is still present.
    • Is the concern still present? 
    1. YES  : INSTALL a new ABS module. REFER to Anti-Lock Brake System (ABS) Module . TEST the system for normal operation.
    2. 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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