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Diagnostic Procedure

WARNING: This page is about a different car, the 2007 Nissan Pathfinder. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK TCM POWER SOURCE STEP 1 
    1. Turn ignition switch OFF.
    2. Disconnect A/T assembly harness connector.
    3. Check voltage between A/T assembly harness connector terminals and ground.
      CONNECTOR TERMINAL VOLTAGE CHART

      Item Connector Terminal Voltage
      TCM F9 1 - Ground Battery voltage
      2 - Ground
      6 - Ground 0V
      4. Fig 1: Checking A/T Assembly Harness Connector Terminals And Ground Voltage
      G04875876

    OK or NG 

    OK: GO TO 2.

    NG: GO TO  3.

  2. CHECK TCM POWER SOURCE STEP 2 
    1. Disconnect A/T assembly harness connector.
    2. Turn ignition switch ON. (Do not start engine.)
    3. Check voltage between A/T assembly harness connector terminals and ground.
      CONNECTOR TERMINAL VOLTAGE CHART

      Item Connector Terminal Voltage
      TCM F9 1 - Ground Battery voltage
      2 - Ground
      6 - Ground
      4. Fig 2: Checking Voltage Between A/T Assembly Harness Connector And Ground
      G04875877

    OK or NG 

    OK: GO TO  4.

    NG: GO TO 3.

  3. DETECT MALFUNCTIONING ITEM 

    Check the following.

    • Harness for short or open between battery and A/T assembly harness connector terminals 1, 2
    • Harness for short or open between ignition switch and A/T assembly harness connector terminal 6
    • 10A fuse (No. 22, located in the fuse and fusible link block) and 10A fuse (No. 49, located in the IPDM E/R)
    • Ignition switch. Refer to "POWER SUPPLY ROUTING CIRCUIT ".

    OK or NG 

    OK: GO TO 4.

    NG: Repair or replace damaged parts.

  4. CHECK TCM GROUND CIRCUIT 
    1. Turn ignition switch OFF.
    2. Disconnect A/T assembly harness connector.
    3. Check continuity between A/T assembly harness connector terminals and ground.
      CONNECTOR TERMINAL CONTINUITY CHART

      Item Connector Terminal Continuity
      TCM F9 5, 10 - Ground Yes
      4. Fig 3: Checking Continuity Between A/T Assembly Harness Connector F9 Terminals 5 And Ground
      G04875878

    If OK, check harness for short to ground and short to power.

    OK or NG 

    OK: GO TO 5.

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

  5. DETECT MALFUNCTIONING ITEM 

    Check the following.

    • The A/T assembly harness connector terminals for damage or loose connection with harness connector.

    OK or NG 

    OK: GO TO 6.

    NG: Repair or replace damaged parts.

  6. PERFORM SELF-DIAGNOSIS 

    Perform self-diagnosis. Refer to "SELF-DIAGNOSTIC RESULT MODE ".

    OK or NG 

    OK: INSPECTION END 

    NG-1: Self-diagnosis does not activate: GO TO 7.

    NG-2: DTC is displayed: Check the malfunctioning system. Refer to "SELF-DIAGNOSTIC RESULT MODE ".

  7. CHECK TERMINAL CORD ASSEMBLY 
    1. Remove control valve with TCM. Refer to "CONTROL VALVE WITH TCM AND A/T FLUID TEMPERATURE SENSOR 2 ".
    2. Disconnect A/T assembly harness connector and TCM connector.
    3. Check continuity between A/T assembly harness connector terminals and TCM connector terminals.
      CONNECTOR TERMINAL VOLTAGE CHART

      Item Connector Terminal Voltage
      A/T assembly harness connector F9 1 Yes
      TCM connector F502 9
      A/T assembly harness connector F9 2 Yes
      TCM connector F502 10
      A/T assembly harness connector F9 6 Yes
      TCM connector F502 4
      Fig 4: Checking Continuity Between A/T Assembly Connector Terminals And TCM Terminals
      G04875879
    4. Check continuity between A/T assembly harness connector terminals and TCM connector terminals.
      CONNECTOR TERMINAL VOLTAGE CHART

      Item Connector Terminal Voltage
      A/T assembly harness connector F9 5 Yes
      TCM connector F504 21
      A/T assembly harness connector F9 10 Yes
      TCM connector F504 22
      5. Fig 5: Checking Continuity Between A/T Assembly Connector Terminals And TCM Connector Terminals
      G04875880
    5. If OK, check harness for short to ground and short to power.

    OK or NG 

    OK: Replace the control valve with TCM. Refer to "CONTROL VALVE WITH TCM AND A/T FLUID TEMPERATURE SENSOR 2 ".

    NG: Replace open circuit or short to ground and short to power in harness or connectors.

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