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Home >> Ford >> 2004 >> Mustang Mach 1, Standard >> Repair and Diagnosis (Single Page) >> Brakes >> Anti-Lock Brakes >> Anti-Lock Brake System >> Diagnosis And Testing >> Anti-Lock Control - Traction Control >> Pinpoint Tests >> Pinpoint Test F: DTC C1145 (RF), DTC C1155 (LF), DTC C1165 (RR), DTC C1175 (LR), DTC C1233 (LF), DTC C1234 (RF), DTC C1235 (RR), DTC C1236 (LR), - Anti-Lock Brake Sensor Input Circuit Failure/Signal Missing

Pinpoint Test F: DTC C1145 (RF), DTC C1155 (LF), DTC C1165 (RR), DTC C1175 (LR), DTC C1233 (LF), DTC C1234 (RF), DTC C1235 (RR), DTC C1236 (LR), - Anti-Lock Brake Sensor Input Circuit Failure/Signal Missing

Test Step 

  1. F1 CHECK THE SUSPECT WHEEL SPEED SENSOR FOR AN OPEN 
    • Disconnect: Suspect wheel speed sensor.
    • Measure the resistance between the suspect wheel speed sensor pins, component side.
      Fig 1: Checking Suspect Wheel Speed Sensor For An Open
      G03237920Courtesy of FORD MOTOR CO.
    • Is the resistance between 1,200 and 1,800 ohms for the front wheel speed sensors, and between 1,300 and 1,900 ohms for the rear wheel speed sensors? 

    Result / Action to Take 

    1. Yes:  GO to F2.
    2. No:  INSTALL a new wheel speed sensor. REFER to SENSOR - Rear  or SENSOR - Front . Clear the DTCs. REPEAT the selftest.
  2. F2 CHECK THE WHEEL SPEED CIRCUITS FOR A SHORT TO POWER 
    NOTE: Both circuits must be checked for each DTC.
    • Key in OFF position.
    • Disconnect: Anti-lock Brake System (ABS) module C135.
    • Key in ON position.
    • Measure the voltage between the ABS module connector, harness side and ground as follows:
      DTC - ABS MODULE C135-PIN

      DTC ABS Module C135-Pin Circuit
      C1145 4 514 (YE/RD)
      C1145 5 516 (YE/BK)
      C1155 20 521 (TN/OG)
      C1155 21 522 (TN/BK)
      C1165 1 494 (TN/LG)
      C1165 3 492 (BN)
      C1175 22 496 (OG)
      C1175 23 499 (GY/BK)
      Fig 2: Checking Wheel Speed Circuits For A Short To Power
      G03237921Courtesy of FORD MOTOR CO.
    • Is any voltage present? 
    1. Yes:  REPAIR the circuit(s) in question. CLEAR the DTCs. REPEAT the self-test.
    2. No:  GO to F3.
  3. F3 CHECK THE WHEEL SPEED CIRCUITS FOR A SHORT TO GROUND 
    NOTE: Both circuits must be checked for each DTC.
    • Key in OFF position.
    • Measure the resistance between the ABS module connector, harness side and ground as follows:
      DTC - ABS MODULE C135-PIN

      DTC ABS Module C135-Pin Circuit
      C1145 4 514 (YE/RD)
      C1145 5 516 (YE/BK)
      C1155 20 521 (TN/OG)
      C1155 21 522 (TN/BK)
      C1165 1 494 (TN/LG)
      C1165 3 492 (BN)
      C1175 22 496 (OG)
      C1175 23 499 (GY/BK)
      Fig 3: Checking Wheel Speed Sensor Circuits For A Short To Ground
      G03237922Courtesy of FORD MOTOR CO.
    • Are the resistances greater than 10,000 ohms? 
    1. Yes:  GO to F4.
    2. No:  REPAIR the circuit(s) in question. CLEAR the DTCs. REPEAT the self-test.
  4. F4 CHECK THE WHEEL SPEED CIRCUITS FOR AN OPEN 
    NOTE: Both circuits must be checked for each DTC.
    • Measure the resistance between the ABS module connector, harness side and the suspect wheel speed sensor connector, harness side as follows:
      DTC - ABS MODULE C135-PIN

      DTC ABS Module C135-Pin Suspect wheel speed sensor-Pin Circuit
      C1145 4 1 514 (YE/RD)
      C1145 5 2 516 (YE/BK)
      C1155 20 1 521 (TN/OG)
      C1155 21 2 522 (TN/BK)
      C1165 1 2 494 (TN/LG)
      C1165 3 1 492 (BN)
      C1175 22 2 496(OG)
      C1175 23 1 499 (GY/BK)
      Fig 4: Checking Wheel Speed Sensor Circuits For An Open
      G03237923Courtesy of FORD MOTOR CO.
    • Are the resistances less than 5 ohms? 
    1. Yes:  If DTC C1233, C1234, C1235, or C1236 is present GO to F5. If DTC C1145, C1155, C1165, or C1175 is present GO to F10
    2. No:  REPAIR the circuit(s) in question. CLEAR the DTCs. REPEAT the self-test.
  5. F5 INSPECT THE WHEEL SPEED SENSOR MOUNTING 
    • Key in OFF position.
    • Inspect the wheel speed sensor for looseness, excessive dirt build -up, metal obstructions, improper harness routing, and chaffing.
    • Is the wheel speed sensor OK? 
    1. Yes:  GO to F6.
    2. No:  REPAIR or INSTALL a new wheel speed sensor. REFER to SENSOR - Rear  or SENSOR - Front . Clear the DTCs. REPEAT the self-test.
  6. F6 CHECK FOR WHEEL SPEED SENSOR RING DAMAGE 
    • Inspect the wheel speed sensor indicator for corrosion, damaged or missing teeth. Rotate the wheel to verify that no teeth are missing, correct mounting and alignment of indicator.
    • Is the wheel speed sensor Indicator OK? 
    1. Yes:  GO to F7.
    2. No:  INSTALL a new wheel speed sensor ring. REFER to SENSOR - Rear  or SENSOR - Front . Clear the DTCs. REPEAT the self-test. CLEAR the DTCs. REPEAT the self-test.
  7. F7 CHECK THE WHEEL SPEED CIRCUITS FOR A SHORT TOGETHER 
    • Key in OFF position.
    • Measure the resistance between the ABS module connector, harness side and ground as follows:
      DTC - ABS MODULE C135-PIN

      DTC ABS Module C135-Pin Circuit
      C1233 4 514 (YE/RD)
      C1233 5 516 (YE/BK)
      C1234 20 521 (TN/OG)
      C1234 21 522 (TN/BK)
      C1235 1 494 (TN/LG)
      C1235 3 492 (BN)
      C1236 22 496 (OG)
      C1236 23 499 (GY/BK)
      Fig 5: Checking Wheel Speed Circuits For A Short Together
      G03237924Courtesy of FORD MOTOR CO.
    • Are the resistances greater than 10,000 ohms? 
    1. Yes:  GO to F8.
    2. No:  REPAIR the circuit(s) in question. CLEAR the DTCs. REPEAT the self-test.
  8. F8 CHECK THE WHEEL SPEED SENSOR OUTPUTS 
    • Key in OFF position.
    • Connect: Suspect wheel speed sensor.
    • While spinning the suspect wheel at one revolution per second measure the AC voltage between the ABS module C135 pins, harness side and as follows:
      DTC - ABS MODULE C135-PIN

      DTC ABS Module C135-Pin Circuit
      C1233 4 514 (YE/RD)
      C1233 5 516 (YE/BK)
      C1234 20 521 (TN/OG)
      C1234 21 522 (TN/BK)
      C1235 1 494 (TN/LG)
      C1235 3 492 (BN)
      C1236 22 496 (OG)
      C1236 23 499 (GY/BK)
      Fig 6: Checking Wheel Speed Sensor Outputs
      G03237925Courtesy of FORD MOTOR CO.
    • Are the resistances greater than 10,000 ohms? 
    1. Yes:  GO to F9.
    2. No:  REPAIR the circuit(s) in question. CLEAR the DTCs. REPEAT the self-test.
  9. F9 CHECK THE SUSPECT WHEEL SPEED SENSOR FOR A SHORT TO GROUND 
    • Disconnect: Suspect wheel speed sensor.
    • Measure the resistance between the suspect wheel speed sensor pin, harness side and ground.
      Fig 7: Checking Suspect Wheel Speed Sensor For A Short To Ground
      G03237926Courtesy of FORD MOTOR CO.
    • Is the resistance greater 10,000 ohms? 
    1. Yes:  GO to F10.
    2. No:  REPAIR the circuit in question.

      CLEAR the DTCs. REPEAT the self-test.

  10. F10 CHECK FOR CORRECT ABS MODULE OPERATION 
    • Disconnect the ABS connector.
    • Check for:
      • corrosion
      • pushed-out pins
    • Connect the ABS connector and make sure it seats 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 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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