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Test Procedure

WARNING: This page is about a different car, the 2004 Lincoln LS. 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. K1 - CHECK THE BRAKE PRESSURE TRANSDUCER CIRCUITRY FOR A SHORT TO POWER

    • Key in OFF position.
    • Disconnect: ABS Module C135.
    • Disconnect: Brake Pressure Transducer C147.
    • Key in ON position.
    • Measure the voltage between ABS module C135 pins, harness side, and ground as follows:
      ABS MODULE C135 PINS CHART

      ABS Module C135 Pin Circuit
      18 7-CF64 (YE/BK)
      19 9-CF64 (BN/YE)
      20 8-CF64 (WH/BK)
      Fig 1: Measuring Voltage Between ABS Module C135 Pins Harness Side And Ground
      G03200204Courtesy of FORD MOTOR CO.
    • Is voltage present? 
      1. Yes  : REPAIR the circuit in question. CLEAR the DTC. REPEAT the self-test.
      2. No  : GO to K2.

  2. K2 - CHECK THE BRAKE PRESSURE TRANSDUCER CIRCUITRY FOR A SHORT TO GROUND

    • Key in OFF position.
    • Measure the resistance between ABS module C135 pins, harness side, and ground, as follows:
      ABS MODULE C135 PINS CHART

      ABS Module C135 Pin Circuit
      18 7-CF64 (YE/BK)
      19 9-CF64 (BN/YE)
      20 8-CF64 (WH/BK)
      Fig 2: Measuring Resistance Between ABS Module C135 Pins Harness Side And Ground
      G03200205Courtesy of FORD MOTOR CO.
    • Are the resistances greater than 10,000 ohms? 
      1. Yes  : GO to K3.
      2. No  : REPAIR the circuit in question. CLEAR the DTC. REPEAT the self-test.

  3. K3 - CHECK THE BRAKE PRESSURE TRANSDUCER CIRCUITRY FOR AN OPEN

    • Measure the resistance between ABS module C135 pins, harness side, and brake pressure transducer C147 pins, harness side, as follows:
      ABS MODULE C135 AND BRAKE PRESSURE TRANSDUCER C147 PINS CHART

      ABS Module C135 Pin Brake Pressure Transducer C147 Pin Circuit
      19 1 9-CF64 (BN/YE)
      20 2 8-CF64 (WH/BK)
      18 3 7-CF64 (YE/BK)
      Fig 3: Measuring Resistance Between ABS Module C135 Pins And Brake Pressure Transducer C147 Pins Harness Side
      G03200206Courtesy of FORD MOTOR CO.
    • Are the resistances less than 5 ohms? 
      1. Yes  : GO to K4.
      2. No  : REPAIR the circuit in question. CLEAR the DTC. REPEAT the self-test.

  4. K4 - CHECK THE ABS MODULE OUTPUT

    • Connect: ABS Module C135.
    • Key in ON position.
    • Measure the voltage between brake pressure transducer C147-3, circuit 7-CF64 (YE/BK), harness side, and brake pressure transducer C147-1, circuit 9-CF64 (BN/YE), harness side.
      Fig 4: Measuring Voltage Between Brake Pressure Transducer And Brake Pressure Transducer Harness Side
      G03200207Courtesy of FORD MOTOR CO.
    • Is the voltage approximately 5 volts? 
      1. Yes  : GO to K5.
      2. No  : INSTALL a new ABS module. REFER to ANTI-LOCK BRAKE SYSTEM (ABS) MODULE  in this section. REPEAT the self-test.

  5. K5 - CHECK THE BRAKE PRESSURE TRANSDUCER OUTPUT

    • Connect: Brake Pressure Transducer C147.
    • Disconnect: ABS Module C135.
    • Remove the ABS module C135-20, circuit 8-CF64 (WH/BK) from the harness connector.
    • Connect: ABS Module C135.
    • Key in ON position.
    • Measure the voltage between ABS module with C135-20, with circuit 8-CF64 (WH/BK) removed from the harness connector and ground, while applying and releasing the brake pedal.
    • Is the voltage between 0.125 and 0.375 volt with the brake pedal released and between 0.125 and 5 volts with the brake pedal applied? 
      1. Yes  : INSTALL a new ABS module. REFER to ANTI-LOCK BRAKE SYSTEM (ABS) MODULE  in this section. REPEAT the self-test.
      2. No  : INSTALL a new brake booster. REFER to BRAKE SYSTEM article. CLEAR the DTC. RECALIBRATE the ABS module. REPEAT the self-test.
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