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1. A/T Check (Position) Indicator Lamp Does Not Come On

WARNING: This page is about a different car, the 2003 Nissan Altima. However, it is still accessible from the selected car via links, so may be relevant.

SYMPTOM: 

A/T check (position) indicator lamp does not come on for about 2 seconds when turning ignition switch to ON. 

  1. CHECK TCM POWER SOURCE 
    1. Turn ignition switch to ON position. (Do not start engine.)
    2. Check voltage between TCM terminals 10 (R/Y), 19 (R/Y), and 28 (Y/R) and ground.

      Voltage :Battery voltage 

    OK or NG 

    1. OK: GO TO 2.
    2. NG: GO TO  3.
    Fig 1: Checking Voltage Between TCM Terminals 10 (R/Y), 19 (R/Y), And 28 (Y/R) And Ground
    G02160937Courtesy of NISSAN MOTOR CO., U.S.A.
  2. CHECK POWER SOURCE STEP 2 
    1. Turn ignition switch to OFF position.
    2. Check voltage between TCM terminal 28 (Y/R) and ground.

      Voltage :Battery voltage 

    OK or NG 

    1. OK: GO TO  4.
    2. NG: GO TO 3.
    Fig 2: Checking Voltage Between TCM Terminal 28 (Y/R) And Ground
    G02160938Courtesy of NISSAN MOTOR CO., U.S.A.
  3. DETECT MALFUNCTIONING ITEM 

    Check the following items:

    OK or NG 

    1. OK: GO TO 4.
    2. NG: Repair or replace damaged parts.
  4. CHECK TCM GROUND CIRCUIT 
    1. Turn ignition switch to OFF position.
    2. Disconnect TCM harness connector.
    3. Check continuity between TCM harness connector terminals 25, 48 and ground.

      Continuity should exist. 

    OK or NG 

    1. OK: GO TO 5.
    2. NG: Repair open circuit or short to ground or short to power in harness or connectors. Refer to "WIRING DIAGRAM - AT - MAIN ".
    Fig 3: Checking Continuity Between TCM Harness Connector Terminals 25, 48 And Ground
    G02160939Courtesy of NISSAN MOTOR CO., U.S.A.
  5. DETECT MALFUNCTIONING ITEM 

    Check the following items:

    • Harness and fuse for short or open between ignition switch and A/T check (position) indicator lamp (Main harness)

      Refer to "POWER SUPPLY ROUTING CIRCUIT ".

    • Harness for short or open between A/T check (position) indicator lamp and TCM

    OK or NG 

    1. OK: GO TO 6.
    2. NG: Repair or replace damaged parts.
  6. CHECK SYMPTOM 

    Check again.

    OK or NG 

    1. OK: INSPECTION END 
    2. NG: GO TO 8.
  7. CHECK TCM INSPECTION 
    1. Perform TCM input/output signal inspection.
    2. If NG, recheck TCM pin terminals for damage or loose connection with harness connector.

    OK or NG 

    1. OK: INSPECTION END 
    2. NG: Repair or replace damaged parts.
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