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Diagnosis Procedure

WARNING: This page is about a different car, the 2008 Infiniti EX35. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK DTC WITH TCM 

    Check "Self diagnostic result" with CONSULT-III. Refer to DTC INDEX .

    Is the inspection result normal? 

    YES: GO TO  2.

    NO: Repair or replace the malfunctioning parts.

  2. CHECK PNP SWITCH CIRCUIT 
    1. Turn ignition switch OFF.
    2. Disconnect TCM connector and BCM connector M123.
    3. Check continuity between TCM harness connector and BCM harness connector.
      TERMINALS CONTINUITY REFERENCE

      TCM BCM Continuity
      Connector Terminal Connector Terminal
      F51 9 M123 140 Existed
    4. Check continuity between TCM harness connector and ground.
      TERMINALS CONTINUITY REFERENCE

      TCM Ground Continuity
      Connector Terminal
      F51 9 Not existed

    Is the inspection result normal? 

    YES: GO TO  3.

    NO: Repair or replace harness or connector.

  3. CHECK CONTROL DEVICE POWER SUPPLY 
    1. Disconnect control device (detention switch) connector.
    2. Check voltage between control device (detention switch) harness connector and ground.
      TERMINALS VOLTAGE REFERENCE

      (+) (-) Voltage (V) (Approx.)
      Control device (detention switch)
      Connector Terminal
      M137 10 Ground Battery voltage

    Is the inspection result normal? 

    YES: GO TO  5.

    NO: GO TO  4.

  4. CHECK CONTROL DEVICE POWER SUPPLY CIRCUIT 
    1. Disconnect BCM connector M122.
    2. Check continuity between control device (detention switch) harness connector and BCM harness connector.
      TERMINALS CONTINUITY REFERENCE

      Control device (detention switch) BCM Continuity
      Connector Terminal Connector Terminal
      M137 10 M122 96 Existed
    3. Check continuity between control device (detention switch) harness connector and ground.
      TERMINALS CONTINUITY REFERENCE

      Control device (detention switch) Ground Continuity
      Connector Terminal
      M137 10 Not existed

    Is the inspection result normal? 

    YES: Replace BCM. Refer to REMOVAL AND INSTALLATION .

    NO: Repair or replace harness or connector.

  5. CHECK CONTROL DEVICE CIRCUIT 
    1. Disconnect BCM connector M122 and IPDM E/R connector E6.
    2. Check continuity between control device (detention switch) harness connector and BCM harness connector.
      TERMINALS CONTINUITY REFERENCE

      Control device (detention switch) BCM Continuity
      Connector Terminal Connector Terminal
      M137 11 M122 99 Existed
    3. Check continuity between control device (detention switch) harness connector and ground.
      TERMINALS CONTINUITY REFERENCE

      Control device (detention switch) Ground Continuity
      Connector Terminal
      M137 11 Not existed

    Is the inspection result normal? 

    YES: GO TO  6.

    NO: Repair or replace harness or connector.

  6. CHECK CONTROL DEVICE (DETENTION SWITCH) 

    Refer to COMPONENT INSPECTION  .

    Is the inspection result normal? 

    YES: GO TO  7.

    NO: Replace control device. Refer to REMOVAL AND INSTALLATION (2WD) or REMOVAL AND INSTALLATION (AWD) .

  7. CHECK INTERMITTENT INCIDENT 

    Refer to INTERMITTENT INCIDENT .

    INSPECTION END

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