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Home >> Infiniti >> 2008 >> G35 Base >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Engine Control System - Component Testing >> ICC Brake Switch >> Diagnosis Procedure
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Diagnosis Procedure

  1. INSPECTION START

    Check which type of transmission the vehicle is equipped with.

    Which type of transmission? 

    A/T >> GO TO 2.

    M/T >> GO TO  7.

  2. CHECK ICC BRAKE SWITCH POWER SUPPLY CIRCUIT
    1. Turn ignition switch OFF.
    2. Disconnect ICC brake switch harness connector.
    3. Turn ignition switch ON.
    4. Check the voltage between ICC brake switch harness connector and ground.
      TERMINALS VOLTAGE REFERENCE

      ICC brake switch Ground Voltage
      Connector Terminal
      E114 1 Ground Battery voltage

    Is the inspection result normal? 

    YES: GO TO  4.

    NO: GO TO 3.

  3. DETECT MALFUNCTIONING PART

    Check the following.

    • Fuse block (J/B) connector E103
    • 10A fuse (No. 3)
    • Harness for open or short between ICC brake switch and fuse

      Repair open circuit or short to ground in harness or connectors.

  4. CHECK ICC BRAKE SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT-II
    1. Turn ignition switch OFF.
    2. Disconnect ECM harness connector.
    3. Check the continuity between ICC brake switch harness connector and ECM harness connector.
      TERMINALS CONTINUITY REFERENCE

      ICC brake switch ECM Continuity
      Connector Terminal Connector Terminal
      E114 2 M107 126 Existed
    4. Also check harness for short to ground and short to power.

    Is the inspection result normal? 

    YES: GO TO  6.

    NO: GO TO 5.

  5. DETECT MALFUNCTIONING PART

    Check the following.

    • Harness connectors E106, M6
    • Harness for open or short between ICC brake switch and ECM

      Repair open circuit or short to ground or short to power in harness or connectors.

  6. CHECK ICC BRAKE SWITCH

    Refer to "COMPONENT INSPECTION (ICC BRAKE SWITCH) ".

    Is the inspection result normal? 

    YES: GO TO  15.

    NO: Replace ICC brake switch.

  7. CHECK ICC BRAKE SWITCH CIRCUIT
    1. Turn ignition switch OFF.
    2. Disconnect ICC clutch switch harness connector.
    3. Turn ignition switch ON.
    4. Check the voltage between ICC clutch switch harness connector and ground.
      TERMINALS VOLTAGE REFERENCE

      ICC clutch switch Ground Condition Voltage
      Connector Terminal
      E113 2 Ground Brake pedal Slightly depressed Approx. 0V
      Fully released Battery voltage

    Is the inspection result normal? 

    YES: GO TO  12.

    NO: GO TO 8.

  8. CHECK ICC BRAKE SWITCH POWER SUPPLY CIRCUIT
    1. Turn ignition switch OFF.
    2. Disconnect ICC brake switch harness connector.
    3. Turn ignition switch ON.
    4. Check the voltage between ICC brake switch harness connector and ground.
      TERMINALS VOLTAGE REFERENCE

      ICC brake switch Ground Voltage
      Connector Terminal
      E114 1 Ground Battery voltage

    Is the inspection result normal? 

    YES: GO TO  10.

    NO: GO TO 9.

  9. DETECT MALFUNCTIONING PART

    Check the following.

    • Fuse block (J/B) connector E103
    • 10A fuse (No. 3)
    • Harness for open or short between ICC brake switch and fuse

      Repair open circuit or short to ground in harness or connectors.

  10. CHECK ICC BRAKE SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
    1. Turn ignition switch OFF.
    2. Check the continuity between ICC brake switch harness connector and ICC clutch switch harness connector.
      TERMINALS CONTINUITY REFERENCE

      ICC brake switch ICC clutch switch Continuity
      Connector Terminal Connector Terminal
      E114 2 E113 2 Existed
    3. Also check harness for short to ground and short to power.

    Is the inspection result normal? 

    YES: GO TO 11.

    NO: Repair open circuit or short to ground or short to power in harness or connectors.

  11. CHECK ICC BRAKE SWITCH

    Refer to "COMPONENT INSPECTION (ICC BRAKE SWITCH) ".

    Is the inspection result normal? 

    YES: GO TO  15.

    NO: Replace ICC brake switch.

  12. CHECK ICC BRAKE SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
    1. Turn ignition switch OFF.
    2. Disconnect ECM harness connector.
    3. Check the continuity between ICC clutch switch harness connector and ECM harness connector.
      TERMINALS CONTINUITY REFERENCE

      ICC clutch switch ECM Continuity
      Connector Terminal Connector Terminal
      E113 1 M107 126 Existed
    4. Also check harness for short to ground and short to power.

    Is the inspection result normal? 

    YES: GO TO  14.

    NO: GO TO 13.

  13. DETECT MALFUNCTIONING PART

    Check the following.

    • Harness connectors E106, M6
    • Harness for open or short between ICC clutch switch and ECM

      Repair open circuit or short to ground or short to power in harness or connectors.

  14. CHECK ICC CLUTCH SWITCH

    Refer to "COMPONENT INSPECTION (ICC CLUTCH SWITCH) ".

    Is the inspection result normal? 

    YES: GO TO 15.

    NO: Replace ICC clutch switch.

  15. CHECK INTERMITTENT INCIDENT

    Refer to "INTERMITTENT INCIDENT ".

    INSPECTION END

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