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Home >> Infiniti >> 2010 >> G37 Base, 2D Convertible >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - Introduction (2 Of 2) >> 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.
      TERMINAL VOLTAGE REFERENCE CHART

      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
    1. Turn ignition switch OFF.
    2. Disconnect ECM harness connector.
    3. Check the continuity between ICC brake switch harness connector and ECM harness connector.
      TERMINAL CONTINUITY REFERENCE CHART

      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, 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 CLUTCH SWITCH 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.
      TERMINAL VOLTAGE REFERENCE CHART

      ICC brake switch Ground Condition Voltage (V)
      Connector Terminal
      E114 1 Ground Clutch pedal Slightly depressed Approx. 0
      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 clutch switch harness connector.
    3. Turn ignition switch ON.
    4. Check the voltage between ICC clutch switch harness connector and ground.
      TERMINAL VOLTAGE REFERENCE CHART

      ICC clutch switch Ground Voltage
      Connector Terminal
      E113 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
    • 10 A fuse (No. 3)
    • Harness for open or short between ICC clutch 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-I
    1. Turn ignition switch OFF.
    2. Check the continuity between ICC clutch switch harness connector and ICC brake switch harness connector.
      TERMINAL CONTINUITY REFERENCE CHART

      ICC clutch switch ICC brake switch Continuity
      Connector Terminal Connector Terminal
      E113 2 E114 1 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, short to ground or short to power in harness or connectors.

  11. 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.

  12. 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.
      TERMINAL CONTINUITY REFERENCE CHART

      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  14.

      NO: GO TO 13.

  13. DETECT MALFUNCTIONING PART

    Check the following.

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

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

  14. 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.

  15. CHECK INTERMITTENT INCIDENT

    Refer to "INTERMITTENT INCIDENT ".

    INSPECTION END

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