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Home >> Infiniti >> 2003 >> M45 >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Automatic Transaxle >> DTC P0615: Start Signal Circuit >> Diagnostic Procedure

Diagnostic Procedure

  1. CHECK PNP RELAY (WITH CONSULT-II) 

    With CONSULT-II 

    1. Turn ignition switch to "ON" position. (Do not start engine.)
    2. Select "SELECTION FROM MENU" in "DATA MONITOR" mode for "A/T" with CONSULT-II and check monitor "STARTER RELAY" (PNP relay) ON/OFF.

    OK or NG 

    OK >> GO TO  4.

    NG >> GO TO  3.

    Fig 1: Consult II Data Monitor Display
    G02021309Courtesy of NISSAN MOTOR CO., U.S.A.
  2. CHECK PNP RELAY (WITHOUT CONSULT-II) 

    Without CONSULT-II 

    1. Turn ignition switch to "ON" position. (Do not start engine.)
    2. Check the voltage between the TCM connector and ground.
    Fig 2: Checking PNP Relay (Without Consult-II) (1 Of 2)
    G02021310Courtesy of NISSAN MOTOR CO., U.S.A.
    Fig 3: Checking PNP Relay (Without Consult-II) (2 Of 2)
    G02021311Courtesy of NISSAN MOTOR CO., U.S.A.

    OK or NG 

    OK >> GO TO  2.

    NG >> GO TO 3.

  3. DETECT MALFUNCTIONING ITEM 

    Check the following items:

    • PNP relay. Refer to "STANDARDIZED RELAY".
    • Disconnections or short-circuits in the harness between TCM and the PNP relay
    • Ground circuit for the PNP relay

    OK or NG 

    OK >> GO TO 4.

    NG >> Repair or replace damaged parts.

  4. CHECK DTC 

    Perform "DTC Confirmation Procedure". Refer to "DTC CONFIRMATION PROCEDURE ".

    OK or NG 

    OK >> INSPECTION END 

    NG >> GO TO 5.

  5. PERFORM 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 

    OK >> INSPECTION END 

    NG >> Repair or replace damaged parts.