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Home >> Nissan-Datsun >> 2004 >> Altima S, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 1177 (Engine Control System - DTCS P0603 To P2A03 (VK56DE)) >> DTC P0850: PNP Switch >> Diagnosis Procedure

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 DTC WITH TCM

    Refer to "OBD-II DIAGNOSTIC TROUBLE CODE (DTC) ".

    OK or NG 

    OK: GO TO 2.

    NG: Repair or replace malfunctioning part.

  2. CHECK STARTING SYSTEM

    Turn ignition switch OFF, then turn it to START.

    Does starter motor operate? 

    Yes or No 

    Yes: GO TO 3.

    No: Refer to "WORK FLOW ".

  3. CHECK PNP SIGNAL CIRCUIT FOR OPEN AND SHORT
    1. Turn ignition switch OFF.
    2. Disconnect ECM harness connector.
    3. Disconnect combination meter harness connector.
    4. Check harness continuity between ECM terminal 102 and combination meter terminal 7.

      Refer to WIRING DIAGRAM .

      Continuity should exist  .

    5. Also check harness for short to ground and short to power.

    OK or NG 

    OK: GO TO  5.

    NG: GO TO 4.

  4. DETECT MALFUNCTIONING PART

    Check the following.

    • Harness connectors M31, E152
    • Harness for open or short between ECM and combination meter

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

  5. CHECK INTERMITTENT INCIDENT

    Refer to "INTERMITTENT INCIDENT ".

    OK or NG 

    OK: GO TO 6.

    NG: Repair or replace malfunctioning part.

  6. REPLACE COMBINATION METER FUNCTION

    Refer to "REMOVAL AND INSTALLATION ".

    >> INSPECTION END