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Home >> Nissan-Datsun >> 2008 >> Sentra SE-R >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Engine Control System - DTCS P0447 To P0850 (Qr25DE) >> DTC P0850 PNP Switch >> Diagnostic Procedure >> CVT Models
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CVT Models

  1. CHECK PNP SWITCH POWER SUPPLY CIRCUIT 
    1. Turn ignition switch OFF.
    2. Disconnect PNP switch harness connector.
    3. Turn ignition switch ON.
    4. Check voltage between PNP switch terminal 7 and ground with CONSULT-III or tester.

      Voltage: Battery voltage 

    OK or NG 

    OK: GO TO  3.

    NG: GO TO 2.

    Fig 1: Checking Voltage Between PNP Switch Terminal 7 And Ground
    G04925507Courtesy of NISSAN MOTOR CO., U.S.A.
  2. DETECT MALFUNCTIONING PART 

    Check the following.

    • Harness connectors E3, F2
    • 10A fuse
    • Harness for open or short between PNP switch and fuse

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

  3. CHECK PNP SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT 
    1. Turn ignition switch OFF.
    2. Disconnect ECM harness connector.
    3. Check harness continuity between PNP switch terminal 6 and ECM terminal 102.

      Refer to WIRING DIAGRAM .

      Continuity should exist. 

    4. 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 F2, E3
    • 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 "DTC P0705 PARK/NEUTRAL 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