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Diagnosis Procedure

WARNING: This page is about a different car, the 2012 Nissan Pathfinder. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK CAN COMMUNICATION LINE

    Perform the self-diagnosis. Refer to "CONSULT FUNCTION (TRANSMISSION) ".

    Is any malfunction in the CAN communication indicated in the results? 

    YES: Check CAN communication line. Refer to U1000 CAN COMM CIRCUIT .

    NO: GO TO 2.

  2. CHECK OVERDRIVE CONTROL SWITCH CIRCUIT

    With CONSULT 

    1. Turn ignition switch "ON".
    2. Select "ECU INPUT SIGNALS" in "DATA MONITOR" mode for "TRANSMISSION" with CONSULT.
    3. Read out "OD CONT SW".

      Check the signal of the overdrive control switch is indicated properly.

      Monitor item Condition Display value
      OD CONT SW Releasing overdrive control switch OFF
      Holding overdrive control switch ON

    Without CONSULT 

    1. Turn ignition switch "ON". (Do not start engine)
    2. Check voltage between A/T control device connector terminal and ground.
      Item Connector Terminal Condition Data (Approx.)
      Overdrive control switch M156 7 - Ground Releasing overdrive control switch Battery voltage
      Holding overdrive control switch 0V
      Fig 1: Checking Voltage Between A/T Control Device Connector Terminal And Ground
      G08165418Courtesy of NISSAN NORTH AMERICA, INC.

      OK or NG 

      OK: GO TO  5.

      NG: GO TO 3.

  3. CHECK OVERDRIVE CONTROL SWITCH
    1. Turn ignition switch "OFF".
    2. Disconnect A/T control device connector.
    3. Check continuity between A/T control device connector terminals.
      Item Connector Terminal Condition Continuity
      Overdrive control switch M156 7 - 8 Releasing overdrive control switch No
      Holding overdrive control switch Yes
      Fig 2: Checking Continuity Between A/T Control Device Connector Terminals
      G08165419Courtesy of NISSAN NORTH AMERICA, INC.

      OK or NG 

      OK: GO TO 4.

      NG: Repair or replace overdrive control switch.

  4. DETECT MALFUNCTIONING ITEM

    Check the following. If any items are damaged, repair or replace damaged parts.

    • Harness for short or open between combination meter connector terminal 20 and A/T control device connector terminal 7.
    • Harness for short or open between A/T control device connector terminal 8 and ground.

      OK or NG 

      OK: GO TO 5.

      NG: Repair or replace damaged parts.

  5. CHECK COMBINATION METER

    Check the combination meter. Refer to "DIAGNOSIS DESCRIPTION ".

    OK or NG 

    OK: INSPECTION END 

    NO: Repair or replace damaged parts.

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