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Home >> Mercury >> 2010 >> Milan Base, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 378 (Anti-Lock Brake System - Vehicle Dynamic Systems) >> Diagnosis And Testing >> Anti-Lock Control - Hybrid >> Pinpoint Tests >> Pinpoint Test O: DTC C1526 - Brake Pedal Travel Sensor Fault >> Pinpoint Test O: DTC C1526 - Brake Pedal Travel Sensor Fault

Pinpoint Test O: DTC C1526 - Brake Pedal Travel Sensor Fault

WARNING: This page is about a different car, the 2006 Mercury Mariner and 2006 Ford Escape. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: Use the Flex Probe Kit for all test connections to prevent damage to the wiring terminals. Do not use standard multi-meter probes.
NOTE: The brake pedal position sensor is integral to the master cylinder. The brake pedal position sensor is not available separately and must be installed as an assembly.
NOTE: The ABS module is matched to the hydraulic control unit (HCU). The ABS module and HCU must be installed as an assembly.
  1. O1 CHECK THE PEDAL TRAVEL CIRCUITS FOR AN OPEN 
    • Key in OFF position.
    • Disconnect: ABS Module C1462
    • Disconnect: Brake Pedal Position Sensor C1347
    • Measure the resistance between:
      • ABS module C1462-18, circuit LCB26 (BU/BN), harness side and brake pedal position sensor C1347-3, circuit LCB26 (BU/BN), harness side.
      • ABS module C1462-19, circuit VCB27 (GY/YE), harness side and brake pedal position sensor C1347-2, circuit VCB27 (GY/YE), harness side.
      • ABS module C1462-20, circuit RCB26 (GN/WH), harness side and brake pedal position sensor C1347-1, circuit RCB26 (GN/WH), harness side.
      • Fig 1: Measuring Resistance
      GF0042309Courtesy of FORD MOTOR CO.
    • Measure the resistance between:
      • ABS module C1462-21, circuit RCA27 (WH), harness side and brake pedal position sensor C1347-4, circuit RCA27 (WH), harness side.
      • ABS module C1462-22, circuit LCA27 (BN/WH), harness side and brake pedal position sensor C1347-6, circuit LCA27 (BN/WH), harness side.
      • ABS module C1462-23, circuit VCA30 (YE/VT), harness side and brake pedal position sensor C1347-5, circuit VCA30 (YE/VT), harness side.
      • Fig 2: Measuring Resistance
      GF0042313Courtesy of FORD MOTOR CO.
    • Are the resistances less than 5 ohms? 
    1. YES  : Go to  O2.
    2. NO  : REPAIR the affected circuit(s). CLEAR the DTC. REPEAT the self-test.
  2. O2 CHECK THE PEDAL TRAVEL CIRCUITS FOR A SHORT TOGETHER 
    • Measure the resistance between brake pedal position sensor C1347-1, circuit RCB26 (GN/WH), harness side and:
      • brake pedal position sensor C1347-2, circuit VCB27 (GY/YE), harness side.
      • brake pedal position sensor C1347-3, circuit LCB26 (BU/BN), harness side.
      • brake pedal position sensor C1347-4, circuit RCA27 (WH), harness side.
      • brake pedal position sensor C1347-5, circuit VCA30 (YE/VT), harness side.
      • brake pedal position sensor C1347-6, circuit LCA27 (BN/WH), harness side.
    • Measure the resistance between brake pedal position sensor C1347-2, circuit VCB27 (GY/YE), harness side and:
      • brake pedal position sensor C1347-3, circuit LCB26 (BU/BN), harness side.
      • brake pedal position sensor C1347-4, circuit RCA27 (WH), harness side.
      • brake pedal position sensor C1347-5, circuit VCA30 (YE/VT), harness side.
      • brake pedal position sensor C1347-6, circuit LCA27 (BN/WH), harness side.
    • Measure the resistance between brake pedal position sensor C1347-3, circuit LCB26 (BU/BN), harness side and:
      • brake pedal position sensor C1347-4, circuit RCA27 (WH), harness side.
      • brake pedal position sensor C1347-5, circuit VCA30 (YE/VT), harness side.
      • brake pedal position sensor C1347-6, circuit LCA27 (BN/WH), harness side.
    • Measure the resistance between brake pedal position sensor C1347-4, circuit RCA27 (WH), harness side and:
      • brake pedal position sensor C1347-5, circuit VCA30 (YE/VT), harness side.
      • brake pedal position sensor C1347-6, circuit LCA27 (BN/WH), harness side.
    • Measure the resistance between brake pedal position sensor C1347-5, circuit VCA30 (YE/VT), harness side and brake pedal position sensor C1347-6, circuit LCA27 (BN/WH), harness side.
    • Are the resistances greater than 10,000 ohms? 
    1. YES  : Go to  O3.
    2. NO  : REPAIR the affected circuit(s). CLEAR the DTC. REPEAT the self-test.
  3. O3 CHECK THE PEDAL TRAVEL CIRCUITS FOR A SHORT TO GROUND 
    • Measure the resistance between ground and:
      • brake pedal position sensor C1347-1, circuit RCB26 (GN/WH), harness side.
      • brake pedal position sensor C1347-2, circuit VCB27 (GY/YE), harness side.
      • brake pedal position sensor C1347-3, circuit LCB26 (BU/BN), harness side.
      • Fig 3: Measuring Resistance
      GF0042311Courtesy of FORD MOTOR CO.
    • Measure the resistance between ground and:
      • brake pedal position sensor C1347-4, circuit RCA27 (WH), harness side.
      • brake pedal position sensor C1347-5, circuit VCA30 (YE/VT), harness side.
      • brake pedal position sensor C1347-6, circuit LCA27 (BN/WH), harness side.
      • Fig 4: Measuring Resistance
      GF0042315Courtesy of FORD MOTOR CO.
    • Are the resistances greater than 10,000 ohms? 
    1. YES  : Go to  O4.
    2. NO  : REPAIR the affected circuit(s). CLEAR the DTC. REPEAT the self-test.
  4. O4 CHECK THE PEDAL TRAVEL CIRCUITS FOR A SHORT TO VOLTAGE 
    • Key in ON position.
    • Measure the voltage between ground and:
      • brake pedal position sensor C1347-1, circuit RCB26 (GN/WH), harness side.
      • brake pedal position sensor C1347-2, circuit VCB27 (GY/YE), harness side.
      • brake pedal position sensor C1347-3, circuit LCB26 (BU/BN), harness side.
      • Fig 5: Measuring Voltage
      GF0042310Courtesy of FORD MOTOR CO.
    • Measure the voltage between ground and:
      • brake pedal position sensor C1347-4, circuit RCA27 (WH), harness side.
      • brake pedal position sensor C1347-5, circuit VCA30 (YE/VT), harness side.
      • brake pedal position sensor C1347-6, circuit LCA27 (BN/WH), harness side.
      • Fig 6: Measuring Voltage
      GF0042314Courtesy of FORD MOTOR CO.
    • Is any voltage present? 
    1. YES  : REPAIR the affected circuit(s). CLEAR the DTC. REPEAT the self-test.
    2. NO  : Go to  O5.
  5. O5 CHECK THE ABS MODULE OUTPUT TO THE PEDAL TRAVEL SENSOR 
    • Key in OFF position.
    • Connect: ABS Module C1462
    • Key in ON position.
    • Measure the voltage between ground and:
      • brake pedal position sensor C1347-3, circuit LCB26 (BU/BN), harness side.
      • brake pedal position sensor C1347-6, circuit LCA27 (BN/WH), harness side.
      • Fig 7: Measuring Voltage
      GF0042317Courtesy of FORD MOTOR CO.
    • Are voltages approximately 5 volts? 
    1. YES  : INSTALL a new master cylinder. REFER to HYDRAULIC BRAKE SYSTEM ACTUATION article. CLEAR the DTCs. REPEAT the self-test.
    2. NO  : Go to  O6.
  6. O6 CHECK FOR ABS MODULE OPERATION 
    • Key in OFF position.
    • Disconnect: ABS Module C1462
    • Check the ABS module electrical connector and the brake pedal position sensor electrical connector for:
      • corrosion.
      • pushed-out pins.
      • spread terminals.
    • Connect: ABS Module C1462
    • Connect: Brake Pedal Position Sensor C1347
    • Key in ON position.
    • Operate the system and verify the concern is still present.
    • Is the concern still present? 
    1. YES  : INSTALL a new HCU. REFER to HYDRAULIC CONTROL UNIT (HCU) . 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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