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Diagnostic Procedure

WARNING: This page is about a different car, the 2006 Nissan Titan. 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.
      Fig 1: Checking Voltage Between A/T Assembly Harness Connector Terminals And Ground
      G04185875Courtesy of NISSAN MOTOR CO., U.S.A.
      TERMINAL VOLTAGE SPECIFICATION

      Item Connector Terminal Voltage
      TCM F9 1 - Ground Battery voltage
      2 - Ground
      6 ((1) or (2)) - Ground 0V
      (1) Column shift
      (2) Floor shift

    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.
      Fig 2: Checking Voltage Between A/T Assembly Harness Connector Terminals And Ground
      G04185876Courtesy of NISSAN MOTOR CO., U.S.A.
      TERMINAL VOLTAGE SPECIFICATION

      Item Connector Terminal Voltage
      TCM F44 1 - Ground Battery voltage
      2 - Ground
      6 ((1) or (2)) - Ground
      (1) Column shift
      (2) Floor shift

    OK or NG 

    OK: GO TO  4.

    NG: GO TO 3.

  3. DETECT MALFUNCTIONING ITEM 

    Check the following items:

    • 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. 3, 4, located in the fuse block (J/B)] 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 F9 terminals 5, 10 and ground.

      Continuity should exist. 

      Fig 3: Checking Continuity Between A/T Assembly Harness Connector F9 Terminals 5, 10 And Ground
      G04185877Courtesy of NISSAN MOTOR CO., U.S.A.

      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 items:

    • 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.
      Fig 4: Checking Continuity Between A/T Assembly Harness Connector Terminals And TCM Connector Terminals
      G04185878Courtesy of NISSAN MOTOR CO., U.S.A.
      TERMINAL CONTINUITY SPECIFICATION

      Item Connector Terminal Continuity
      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
    4. Check continuity between A/T assembly harness connector terminals and TCM connector terminals.
      Fig 5: Checking Continuity Between A/T Assembly Harness Connector Terminals And TCM Connector Terminals
      G04185879Courtesy of NISSAN MOTOR CO., U.S.A.
      TERMINAL CONTINUITY SPECIFICATION

      Item Connector Terminal Continuity
      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. 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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