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Home >> Nissan-Datsun >> 2006 >> Quest Base >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - DTCS P0447 To P1211 >> DTC P0850 PNP Switch >> Diagnostic Procedure >> Procedure A
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Procedure A

  1. CHECK STARTING SYSTEM 

    Turn ignition switch OFF, then turn it to START.

    Does starter motor operate? 

    Yes or No 

    Yes : GO TO 2.

    No : Refer to , "STARTING SYSTEM ".

  2. CHECK PNP SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT-I 
    1. Turn ignition switch OFF.
    2. Disconnect combination meter harness connector M23.
    3. Turn ignition switch ON.
    4. Check voltage between combination meter terminals 35, 36 and ground with CONSULT-II or tester under the following conditions.
      PNP SWITCH VOLTAGE

      Condition (Shift position) Voltage
      Terminal 35 Terminal 36
      P position BATTERY VOLTAGE (11 - 14V) Approximately 0 V
      N position Approximately 0 V BATTERY VOLTAGE (11 - 14V)
      Except the above position Approximately 0 V Approximately 0 V
      Fig 1: Checking Voltage Between Combination Meter Terminals 35, 36 And Ground
      G04196982Courtesy of NISSAN MOTOR CO., U.S.A.

    OK or NG 

    OK : GO TO  9.

    NG : GO TO 3.

  3. CHECK PNP SWITCH POWER SUPPLY CIRCUIT 
    1. Turn ignition switch OFF.
    2. Disconnect PNP switch harness connector.
      Fig 2: Checking PNP Switch Power Supply Circuit
      G04196983Courtesy of NISSAN MOTOR CO., U.S.A.
    3. Turn ignition switch ON.
    4. Check voltage between PNP switch terminal 3 and ground with CONSULT-II or tester.

      Voltage: Battery voltage 

    OK or NG 

    OK : GO TO  5.

    NG : GO TO 4.

    Fig 3: Checking Voltage Between PNP Switch Terminal 3 And Ground
    G04196984Courtesy of NISSAN MOTOR CO., U.S.A.
  4. DETECT MALFUNCTIONING PART 

    Check the following.

    • Harness connectors E8, F17
    • Harness connectors E25, M90
    • 10A fuse
    • Fuse block (J/B) connector M4
    • 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.

  5. CHECK PNP SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT-I 
    1. Check harness continuity between PNP switch terminal 7 and combination meter terminal 35, PNP switch terminal 9 and combination meter terminal 36.

      Refer to WIRING DIAGRAM .

      Continuity should exist. 

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

    OK or NG 

    OK : GO TO  7.

    NG : GO TO 6.

  6. DETECT MALFUNCTIONING PART 

    Check the following.

    • Harness connectors E2, F32
    • Harness connectors E25, M90
    • Harness for open or short between PNP switch and combination meter

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

  7. CHECK PNP SWITCH 

    Refer to , "DTC P0705 PARK/NEUTRAL POSITION SWITCH ".

    OK or NG 

    OK : GO TO 8.

    NG : Replace PNP switch.

  8. CHECK INTERMITTENT INCIDENT 

    Refer to , "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT ".

    : INSPECTION END 

  9. CHECK PNP SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT-II 
    1. Turn ignition switch OFF.
    2. Disconnect ECM harness connector.
    3. Check harness continuity between ECM terminal 102 and combination meter terminal 12.

      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  11.

    NG : GO TO 10.

  10. DETECT MALFUNCTIONING PART 

    Check the following.

    • Harness connectors E134, M83
    • 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.

  11. CHECK COMBINATION METER 

    Refer to , "COMBINATION METERS ".

    OK or NG 

    OK : GO TO 12.

    NG : Replace combination meter

  12. CHECK INTERMITTENT INCIDENT 

    Refer to , "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT ".

    : INSPECTION END