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Home › Infiniti › 2013 › M35h › Repair and Diagnosis › External Pages › Different car › Section 30 (Brake System) › DTC/Circuit Diagnosis › DTC C1A62: Control Module › Diagnosis Procedure

Diagnosis Procedure

WARNING: This page is about a different car, the 2012 Infiniti M35h. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK 12V BATTERY
    1. Turn the ignition switch OFF.
    2. Check the 12V battery terminal connections. Refer to "REMOVAL AND INSTALLATION ".
    3. Check the 12V battery. Refer to "WORK FLOW ".

      Is the inspection result normal? 

      YES: GO TO 2.

      NO: Repair or replace error-detected parts and GO TO 2.

  2. PERFORM SELF-DIAGNOSIS (1)

    ◦ With CONSULT-III.

    1. Connect 12V battery cable to negative terminal. Refer to "REMOVAL AND INSTALLATION ".
    2. Turn the ignition switch OFF to ON.
      CAUTION: Never set the vehicle to READY/Never start the engine.
    3. Repeat step  2 two times or more.
      CAUTION: Be sure to wait for 5 seconds or more after turning the ignition switch OFF.
    4. Turn the ignition switch OFF.
    5. Close all doors including the trunk lid, and wait outside of vehicle for 5 minutes or more.
    6. Turn the ignition switch ON.
      CAUTION: Never set the vehicle to READY/Never start the engine.
    7. Erase self-diagnosis result of "BRAKE".
      CAUTION: Turn the ignition switch OFF and wait 5 minutes or more after erase self-diagnosis result.
    8. Depress brake pedal by 100 mm (3.94 in) or more, and hold the position for 5 seconds or more.
    9. Release brake pedal.
    10. Repeat steps  8 to  9 three times.
    11. Perform "BRAKE" self-diagnosis.

      Is DTC "C1A62" detected? 

      YES: GO TO 3.

      NO: INSPECTION END

  3. CHECK CONNECTOR TERMINALS
    1. Close all doors including the trunk lid, and wait outside of vehicle for 5 minutes or more.
      CAUTION: Never depress brake pedal.
    2. Disconnect 12V battery cable from negative terminal. Refer to "REMOVAL AND INSTALLATION ".
    3. Disconnect the electrically-driven intelligent brake unit harness connector, then check for failures of pin terminals and connections.

      Is the inspection result normal? 

      YES: GO TO  5.

      NO: Repair or replace error-detected parts and GO TO 4.

  4. PERFORM SELF-DIAGNOSIS (2)

    ◦ With CONSULT-III.

    1. Connect the electrically-driven intelligent brake unit harness connector.
    2. Connect 12V battery cable to negative terminal. Refer to "REMOVAL AND INSTALLATION ".
    3. Turn the ignition switch OFF to ON.
      CAUTION: Never set the vehicle to READY/Never start the engine.
    4. Repeat step  3 two times or more.
      CAUTION: Be sure to wait for 5 seconds or more after turning the ignition switch OFF.
    5. Turn the ignition switch OFF.
    6. Close all doors including the trunk lid, and wait outside of vehicle for 5 minutes or more.
    7. Turn the ignition switch ON.
      CAUTION: Never set the vehicle to READY/Never start the engine.
    8. Erase self-diagnosis result of "BRAKE".
      CAUTION: Turn the ignition switch OFF and wait 5 minutes or more after erase self-diagnosis result.
    9. Depress brake pedal by 100 mm (3.94 in) or more, and hold the position for 5 seconds or more.
    10. Release brake pedal.
    11. Repeat steps  9 to  10 three times.
    12. Perform "BRAKE" self-diagnosis.

      Is DTC "C1A62" detected? 

      YES: GO TO 5.

      NO: INSPECTION END

  5. CHECK IGNITION POWER SUPPLY
    1. Connect the electrically-driven intelligent brake unit harness connector.
    2. Connect 12V battery cable to negative terminal. Refer to "REMOVAL AND INSTALLATION ".
    3. Turn the ignition switch OFF.
    4. Close all doors including the trunk lid, and wait outside of vehicle for 5 minutes or more.
      CAUTION: Never depress brake pedal.
    5. Disconnect 12V battery cable to negative terminal. Refer to "REMOVAL AND INSTALLATION ".
    6. Disconnect the electrically-driven intelligent brake unit harness connector.
    7. Connect 12V battery cable to negative terminal. Refer to "REMOVAL AND INSTALLATION ".
    8. Check voltage between the electrically-driven intelligent brake unit harness connector and ground.
      Electrically-driven intelligent brake unit - Voltage
      Connector Terminal
      E87 26 Ground Approx. 0 V
    9. Turn the ignition switch ON.
      CAUTION: Never set the vehicle to READY/Never start the engine.
    10. Check voltage between the electrically-driven intelligent brake unit harness connector and ground.
      Electrically-driven intelligent brake unit - Voltage
      Connector Terminal
      E87 26 Ground 10 - 16 V

      Is the inspection result normal? 

      YES: GO TO  8.

      NO: GO TO 6.

  6. CHECK IGNITION POWER SUPPLY CIRCUIT
    1. Turn the ignition switch OFF.
    2. Disconnect 12V battery cable to negative terminal. Refer to "REMOVAL AND INSTALLATION ".
    3. Check 10A fuse (#46).
    4. Disconnect IPDM E/R harness connector.
    5. Check continuity between electrically-driven intelligent brake unit and IPDM E/R.
      Electrically-driven intelligent brake unit IPDM E/R Continuity
      Connector Terminal Connector Terminal
      E87 26 E5 12 Existed
    6. Check continuity between electrically-driven intelligent brake unit harness connector and ground.
      Electrically-driven intelligent brake unit - Continuity
      Connector Terminal
      E87 26 Ground Not existed

      Is the inspection result normal? 

      YES: Perform trouble diagnosis for ignition power supply. Refer to "WIRING DIAGRAM - IGNITION POWER SUPPLY - ".

      NO: Repair or replace error-detected parts and GO TO 7.

  7. PERFORM SELF-DIAGNOSIS (3)

    ◦ With CONSULT-III.

    1. Connect the electrically-driven intelligent brake unit harness connector.
    2. Connect IPDM E/R harness connector.
    3. Connect 12V battery cable to negative terminal. Refer to "REMOVAL AND INSTALLATION ".
    4. Turn the ignition switch OFF to ON.
      CAUTION: Never set the vehicle to READY/Never start the engine.
    5. Repeat step  4 two times or more.
      CAUTION: Be sure to wait for 5 seconds or more after turning the ignition switch OFF.
    6. Turn the ignition switch OFF.
    7. Close all doors including the trunk lid, and wait outside of vehicle for 5 minutes or more.
    8. Turn the ignition switch ON.
      CAUTION: Never set the vehicle to READY/Never start the engine.
    9. Erase self-diagnosis result of "BRAKE".
      CAUTION: Turn the ignition switch OFF and wait 5 minutes or more after erase self-diagnosis result.
    10. Depress brake pedal by 100 mm (3.94 in) or more, and hold the position for 5 seconds or more.
    11. Release brake pedal.
    12. Repeat steps  10 to  11 three times.
    13. Perform "BRAKE" self-diagnosis.

      Is DTC "C1A62" detected? 

      YES: GO TO 8.

      NO: INSPECTION END

  8. CHECK 12V BATTERY POWER SUPPLY
    1. Turn the ignition switch OFF.
    2. Disconnect 12V battery cable to negative terminal. Refer to "REMOVAL AND INSTALLATION ".
    3. Disconnect the electrically-driven intelligent brake unit harness connector.
    4. Connect 12V battery cable to negative terminal. Refer to "REMOVAL AND INSTALLATION ".
    5. Check voltage between the electrically-driven intelligent brake unit harness connector terminals.
      Electrically-driven intelligent brake unit Voltage
      Connector Terminal
      E87 1 - 31 10 - 16 V
      2 - 31
      11 - 31
    6. Turn the ignition switch ON.
      CAUTION: Never set the vehicle to READY/Never start the engine.
    7. Check voltage between the electrically-driven intelligent brake unit harness connector terminals.
      Electrically-driven intelligent brake unit Voltage
      Connector Terminal
      E87 1 - 31 10 - 16 V
      2 - 31
      11 - 31

      Is the inspection result normal? 

      YES: GO TO  11.

      NO: GO TO 9.

  9. CHECK 12V BATTERY POWER SUPPLY CIRCUIT
    1. Turn the ignition switch OFF.
    2. Disconnect 12V battery cable to negative terminal. Refer to "REMOVAL AND INSTALLATION ".
    3. Check 50A fusible link (#D).
    4. Check continuity and for short circuit between electrically-driven intelligent brake unit harness connector terminal (1) and 50A fusible link (#D).
    5. Check continuity and for short circuit between electrically-driven intelligent brake unit harness connector terminal (2) and 50A fusible link (#D).
    6. Check 10A fuse (#65).
    7. Check continuity and for short circuit between electrically-driven intelligent brake unit harness connector terminal (11) and 10A fuse (#65).

      Is the inspection result normal? 

      YES: Perform diagnosis for 12V battery power supply. Refer to "WIRING DIAGRAM - BATTERY POWER SUPPLY - ".

      NO: Repair or replace error-detected parts and GO TO 10.

  10. PERFORM SELF-DIAGNOSIS (4)

    ◦ With CONSULT-III.

    1. Connect the electrically-driven intelligent brake unit harness connector.
    2. Connect 12V battery cable to negative terminal. Refer to "REMOVAL AND INSTALLATION ".
    3. Turn the ignition switch OFF to ON.
      CAUTION: Never set the vehicle to READY/Never start the engine.
    4. Repeat step  3 two times or more.
      CAUTION: Be sure to wait for 5 seconds or more after turning the ignition switch OFF.
    5. Turn the ignition switch OFF.
    6. Close all doors including the trunk lid, and wait outside of vehicle for 5 minutes or more.
    7. Turn the ignition switch ON.
      CAUTION: Never set the vehicle to READY/Never start the engine.
    8. Erase self-diagnosis result of "BRAKE".
      CAUTION: Turn the ignition switch OFF and wait 5 minutes or more after erase self-diagnosis result.
    9. Depress brake pedal by 100 mm (3.94 in) or more, and hold the position for 5 seconds or more.
    10. Release brake pedal.
    11. Repeat steps  9 to  10 three times.
    12. Perform "BRAKE" self-diagnosis.

      Is DTC "C1A62" detected? 

      YES: GO TO 11.

      NO: INSPECTION END

  11. CHECK GROUND CIRCUIT
    1. Disconnect 12V battery cable to negative terminal. Refer to "REMOVAL AND INSTALLATION ".
    2. Disconnect the electrically-driven intelligent brake unit harness connector.
    3. Check continuity between electrically-driven intelligent brake unit and ground.
      Electrically-driven intelligent brake unit - Continuity
      Connector Terminal
      E87 31 Ground Existed

      Is the inspection result normal? 

      YES: GO TO  13.

      NO: Repair or replace error-detected parts and GO TO 12.

  12. PERFORM SELF-DIAGNOSIS (5)

    ◦ With CONSULT-III.

    1. Connect the electrically-driven intelligent brake unit harness connector.
    2. Connect 12V battery cable to negative terminal. Refer to "REMOVAL AND INSTALLATION ".
    3. Turn the ignition switch OFF to ON.
      CAUTION: Never set the vehicle to READY/Never start the engine.
    4. Repeat step  3 two times or more.
      CAUTION: Be sure to wait for 5 seconds or more after turning the ignition switch OFF.
    5. Turn the ignition switch OFF.
    6. Close all doors including the trunk lid, and wait outside of vehicle for 5 minutes or more.
    7. Turn the ignition switch ON.
      CAUTION: Never set the vehicle to READY/Never start the engine.
    8. Erase self-diagnosis result of "BRAKE".
      CAUTION: Turn the ignition switch OFF and wait 5 minutes or more after erase self-diagnosis result.
    9. Depress brake pedal by 100 mm (3.94 in) or more, and hold the position for 5 seconds or more.
    10. Release brake pedal.
    11. Repeat steps  9 to  10 three times.
    12. Perform "BRAKE" self-diagnosis.

      Is DTC "C1A62" detected? 

      YES: GO TO 13.

      NO: INSPECTION END

  13. CHECK DATA MONITOR

    ◦ With CONSULT-III.

    1. Connect the electrically-driven intelligent brake unit harness connector.
    2. Connect 12V battery cable to negative terminal. Refer to "REMOVAL AND INSTALLATION ".
    3. Turn the ignition switch OFF to ON.
      CAUTION: Never set the vehicle to READY/Never start the engine.
    4. Repeat step  3 two times or more.
      CAUTION: Be sure to wait for 5 seconds or more after turning the ignition switch OFF.
    5. Select "BRAKE" and "DATA MONITOR" according this order.
    6. Check "MOTOR POWER SUPPLY" and "CONTROL MODULE POWER". Refer to "REFERENCE VALUE ".

      Is the inspection result normal? 

      YES: GO TO 14.

      NO: Replace the electrically-driven intelligent brake unit. Refer to "REMOVAL AND INSTALLATION ".

  14. PERFORM SELF-DIAGNOSIS (6)

    ◦ With CONSULT-III.

    1. Turn the ignition switch OFF to ON.
      CAUTION: Never set the vehicle to READY/Never start the engine.
    2. Repeat step  1 two times or more.
      CAUTION: Be sure to wait for 5 seconds or more after turning the ignition switch OFF.
    3. Turn the ignition switch OFF.
    4. Close all doors including the trunk lid, and wait outside of vehicle for 5 minutes or more.
    5. Turn the ignition switch ON.
      CAUTION: Never set the vehicle to READY/Never start the engine.
    6. Erase self-diagnosis result of "BRAKE".
      CAUTION: Turn the ignition switch OFF and wait 5 minutes or more after erase self-diagnosis result.
    7. Depress brake pedal by 100 mm (3.94 in) or more, and hold the position for 5 seconds or more.
    8. Release brake pedal.
    9. Repeat steps  7 to  8 three times.
    10. Perform "BRAKE" self-diagnosis.

      Is DTC "C1A62" detected? 

      YES: GO TO 15.

      NO: INSPECTION END

  15. CHECK BCM SYSTEM

    ◦ With CONSULT-III.

    Perform self-diagnosis for "BCM". Refer to "BCM: CONSULT FUNCTION (BCM - BCM) ".

    Is any DTC detected? 

    YES: Check the DTC. Refer to "DTC INDEX ".

    NO: GO TO 16.

  16. PERFORM SELF-DIAGNOSIS (7)

    ◦ With CONSULT-III.

    1. Turn the ignition switch OFF to ON.
      CAUTION: Never set the vehicle to READY/Never start the engine.
    2. Repeat step  1 two times or more.
      CAUTION: Be sure to wait for 5 seconds or more after turning the ignition switch OFF.
    3. Turn the ignition switch OFF.
    4. Close all doors including the trunk lid, and wait outside of vehicle for 5 minutes or more.
    5. Turn the ignition switch ON.
      CAUTION: Never set the vehicle to READY/Never start the engine.
    6. Erase self-diagnosis result of "BRAKE".
      CAUTION: Turn the ignition switch OFF and wait 5 minutes or more after erase self-diagnosis result.
    7. Depress brake pedal by 100 mm (3.94 in) or more, and hold the position for 5 seconds or more.
    8. Release brake pedal.
    9. Repeat steps  7 to  8 three times.
    10. Perform "BRAKE" self-diagnosis.

      Is DTC "C1A62" detected? 

      YES: Replace the electrically-driven intelligent brake unit. Refer to "REMOVAL AND INSTALLATION ".

      NO: INSPECTION END

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