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Home >> Infiniti >> 2011 >> G37 IPL, Standard >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 61 (Automatic Transmission -- G37 Coupe) >> DTC/Circuit Diagnosis >> Main Power Supply And Ground Circuit >> Diagnosis Procedure

Diagnosis Procedure

WARNING: This page is about a different variant/trim than selected.
  1. CHECK TCM POWER SOURCE (PART 1)
    1. Turn ignition switch OFF.
    2. Disconnect A/T assembly connector.
    3. Check voltage between A/T assembly vehicle side harness connector terminal and ground.
      VOLTAGE REFERENCE CHART

      A/T assembly vehicle side harness connector Ground Condition Voltage (Approx.)
      Connector Terminal
      F51 2 Always Battery voltage

      Is the inspection result normal? 

      YES: Go to 2.

      NO: Go to  6.

  2. CHECK TCM POWER SOURCE (PART 2)

    Check voltage between A/T assembly vehicle side harness connector terminals and ground.

    VOLTAGE REFERENCE CHART

    A/T assembly vehicle side harness connector Ground Condition Voltage (Approx.)
    Connector Terminal
    F51 1 Turn ignition switch ON Battery voltage
    Turn ignition switch OFF 0 V
    6 Turn ignition switch ON Battery voltage
    Turn ignition switch OFF 0 V

    Is the inspection result normal? 

    YES: Go to 3.

    NO: Go to  7.

  3. CHECK TCM GROUND CIRCUIT

    Check continuity between A/T assembly vehicle side harness connector terminals and ground.

    CONTINUITY REFERENCE CHART

    A/T assembly vehicle side harness connector Ground Continuity
    Connector Terminal
    F51 5 Existed
    10

    Is the inspection result normal? 

    YES: Go to 4.

    NO: Repair or replace damaged parts.

  4. CHECK JOINT CONNECTOR
    1. Remove joint connector. Refer to "EXPLODED VIEW ".
    2. Check the continuity between joint connector terminals.
      CONTINUITY REFERENCE CHART

      A/T assembly harness connector side TCM harness connector side Continuity
      Terminal Terminal
      1 1 Existed
      2 2
      5 5
      6 6
      10 10

      Is the inspection result normal? 

      YES: Go to 5.

      NO: Repair or replace damaged parts.

  5. CHECK INTERMITTENT INCIDENT

    Refer to "INTERMITTENT INCIDENT ".

    Is the inspection result normal? 

    YES: Replace the control valve & TCM. Refer to "EXPLODED VIEW ".

    NO: Repair or replace damaged parts.

  6. DETECT MALFUNCTIONING ITEM

    Check the following.

    • Harness for short or open between battery positive terminal and A/T assembly vehicle side harness connector terminal 2. Refer to "WIRING DIAGRAM - BATTERY POWER SUPPLY - ".
    • Battery
    • 10A fuse (No. 36, located in the fuse, fusible link and relay box). Refer to "FUSE AND FUSIBLE LINK ARRANGEMENT ".

      Is the inspection result normal? 

      YES: Replace the control valve & TCM. Refer to "EXPLODED VIEW ".

      NO: Repair or replace damaged parts.

  7. CHECK HARNESS BETWEEN IPDM E/R AND A/T ASSEMBLY (PART 1)
    1. Turn ignition switch OFF.
    2. Disconnect IPDM E/R connector.
    3. Check continuity between IPDM E/R vehicle side harness connector terminal and A/T assembly vehicle side harness connector terminals.
      CONTINUITY REFERENCE CHART

      IPDM E/R vehicle side harness connector A/T assembly vehicle side harness connector Continuity
      Connector Terminal Connector Terminal
      E7 58 F51 1 Existed
      6

      Is the inspection result normal? 

      YES: Go to 8.

      NO: Repair or replace damaged parts.

  8. CHECK HARNESS BETWEEN IPDM E/R AND A/T ASSEMBLY (PART 2)

    Check continuity between A/T assembly vehicle side harness connector terminal and ground.

    CONTINUITY REFERENCE CHART

    A/T assembly vehicle side harness connector Ground Continuity
    Connector Terminal
    F51 1 Not existed
    6

    Is the inspection result normal? 

    YES: Go to 9.

    NO: Repair or replace damaged parts.

  9. DETECT MALFUNCTIONING ITEM

    Check the following.

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