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Home >> Nissan-Datsun >> 2003 >> Sentra Limited >> Repair and Diagnosis >> External Pages >> Different car >> Section 2413 (Engine Control System - DTCS P0643 To P2A03 (VQ40DE)) >> 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 "DTC INSPECTION PRIORITY CHART ".

    OK or NG 

    OK: GO TO 2.

    NG: Repair or replace.

  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 "SYSTEM DIAGRAM ".

  3. CHECK PNP INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT-II
    1. Disconnect ECM harness connector.
    2. Check harness continuity between ECM terminal 102 and combination meter terminal 7.

      Refer to WIRING DIAGRAM .

      Continuity should exist  .

    3. 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 E152, M31
    • 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.

  6. REPLACE COMBINATION METER

    Refer to "REMOVAL AND INSTALLATION ".

    INSPECTION END