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Home >> Nissan-Datsun >> 2006 >> Maxima SL >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - DTCS P0447 To P1168 >> DTC P0850 PNP Switch >> Diagnostic Procedure >> Procedure A

Procedure A

  1. CHECK PNP SWITCH GROUND CIRCUIT FOR OPEN AND SHORT 
    1. Turn ignition switch OFF.
    2. Disconnect PNP switch harness connector.
    3. Fig 1: Disconnecting PNP Switch Harness Connector
      G04160684Courtesy of NISSAN MOTOR CO., U.S.A.
    4. Check harness continuity between PNP switch terminal 2 and ground.

      Refer to WIRING DIAGRAM .

      Continuity should exist  .

    5. Also check harness for short to power.

    OK or NG 

    OK: GO TO  3.

    NG: GO TO  2.

  2. DETECT MALFUNCTIONING PART 

    Check the following.

    • Harness connectors F58, M70
    • Harness for open or short between PNP switch and ground

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

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

      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 F59, M71
    • Harness for open or short between PNP switch and ECM

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

  5. CHECK PNP SWITCH 

    Refer to "POSITION SWITCH ".

    OK or NG 

    OK: GO TO  6.

    NG: Replace PNP switch.

  6. CHECK INTERMITTENT INCIDENT 

    Refer to "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT ".

    : INSPECTION END