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Home >> Ford >> 2000 >> Contour SE, 2.5 L, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 1947 (Anti-Lock Brake System -- F250-F550 Super Duty) >> Diagnostic Tests >> Pinpoint Tests >> Pinpoint Test C: DTCs C1145 (RF), C1155 (LF), C1175 (REAR) >> Testing

Pinpoint Test C: DTCs C1145 (RF), C1155 (LF), C1175 (REAR): Testing

WARNING: This page is about a different car, the 2007 Ford Pickup, 2007 Ford F550 Super Duty, 2007 Ford F450 Super Duty, and 2007 Ford Cab & Chassis. 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 
    NOTE: Both circuits must be checked for each DTC.
    • Connect the diagnostic tool.
    • 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 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  : If any other DTCs are retrieved, go to the Anti-Lock Brake System (ABS) Module Diagnostic Trouble Code (DTC) Index.
  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, Rear Wheel Drive (RWD)  or Wheel Speed Sensor - Front, Four Wheel Drive (4WD)  in this article. For the rear wheel speed sensor, REFER to Wheel Speed Sensor - Rear  in this article. 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, Rear Wheel Drive (RWD)  or Wheel Speed Sensor - Front, Four Wheel Drive (4WD)  in this article. For the rear wheel speed sensor, REFER to Wheel Speed Sensor - Rear  in this article. CLEAR the DTCs. REPEAT the self-test.

  4. C4 CHECK FOR A SHORT TO VOLTAGE 
    NOTE: Both circuits must be checked for each DTC.
    • Key in OFF position.
    • Disconnect: ABS Module C135
    • Disconnect: Suspect Wheel Speed Sensor
    • Key in ON position.
    • For DTC C1145  : measure the voltage between ground and:
      • ABS module C135-26, circuit 514 (YE/RD), harness side.
      • ABS module C135-27, circuit 516 (YE/BK), harness side.
    • For DTC C1155  : measure the voltage between ground and:
      • ABS module C135-12, circuit 521 (TN/OG), harness side.
      • ABS module C135-13, circuit 522 (TN/PK), harness side.
    • For DTC C1175  : measure the voltage between ground and:
      • ABS module C135-42, circuit 523 (RD/PK), harness side.
      • ABS module C135-41, 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 FOR A SHORT TO GROUND 
    • Key in OFF position.
    • For DTC C1145  : measure the resistance between ground and:
      • ABS module C135-26, circuit 514 (YE/RD), harness side.
      • ABS module C135-27, circuit 516 (YE/BK), harness side.
    • For DTC C1155  : measure the resistance between ground and:
      • ABS module C135-12, circuit 521 (TN/OG), harness side.
      • ABS module C135-13, circuit 522 (TN/PK), harness side.
    • For DTC C1175  : measure the resistance between ground and:
      • ABS module C135-42, circuit 523 (RD/PK), harness side.
      • ABS module C135-41, 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 FOR AN OPEN 
    • Key in OFF position.
    • Disconnect: ABS Module C135
    • Disconnect: Suspect Wheel Speed Sensor
    • For DTC C1145  : measure the resistance between:
      • ABS module C135-26, circuit 514 (YE/RD), harness side and RF wheel speed sensor C160-1, circuit 514 (YE/RD), harness side.
      • ABS module C135-27, circuit 516 (YE/BK), harness side and RF wheel speed sensor C160-2, circuit 516 (YE/BK), harness side.
    • For DTC C1155  : measure the resistance between:
      • ABS module C135-12, circuit 521 (TN/OG), harness side and LF wheel speed sensor C150-1, circuit 521 (TN/OG), harness side.
      • ABS module C135-13, circuit 522 (TN/PK), harness side and LF wheel speed sensor C150-2, circuit 522 (TN/PK), harness side.
    • For DTC C1175  : measure the resistance between:
      • ABS module C135-42, circuit 523 (RD/PK), harness side and rear wheel speed sensor C455-2, circuit 523 (RD/PK), harness side.
      • ABS module C135-41, circuit 519 (LG/BK), harness side and rear wheel speed sensor C455-1, 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 
    • Measure the resistance between suspect front wheel speed sensor pins, harness side with the meter in the 10 megaohm range.
      Fig 1: Checking Shorted Wheel Speed Sensor Circuits (1 Of 2)
      GF0006727Courtesy of FORD MOTOR CO.
    • Measure the resistance between rear wheel speed sensor pins, harness side with the meter in the 10 megaohm range.
      Fig 2: Checking Shorted Wheel Speed Sensor Circuits (2 Of 2)
      GF0006728Courtesy of FORD MOTOR CO.
    • Is there any continuity? 
    1. YES  : REPAIR the affected circuit(s). CLEAR the DTCs. REPEAT the self-test.
    2. NO  : Go to  C8.
  8. C8 CHECK THE ABS MODULE OUTPUT 
    • Connect: ABS Module C135
    • Key in ON position.
    • Measure the voltage between the suspect front wheel speed sensor pins, harness side.
    • Measure the voltage between the rear wheel speed sensor pins, harness side.
      Fig 3: Checking ABS Module Output
      GF0003404Courtesy of FORD MOTOR CO.
    • Are the voltages greater than 10 volts? 
    1. YES  : INSTALL a new wheel speed sensor. For the front wheel speed sensor, REFER to Wheel Speed Sensor - Front, Rear Wheel Drive (RWD)  or Wheel Speed Sensor - Front, Four Wheel Drive (4WD)  in this article. CLEAR the DTCs. REPEAT the self-test. For the rear wheel speed sensor, REFER to Wheel Speed Sensor - Rear  in this article. CLEAR the DTCs. TEST the system for normal operation.
    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 that 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  in this article. CLEAR the DTCs. REPEAT the self-test.
    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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