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Home >> Infiniti >> 2021 >> QX80 Premium Select, AWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (DTCS) (4 Of 5) >> Engine (ECM) >> DTC P0850: PNP Switch >> Confirmation Procedure

Confirmation Procedure

  1. INSPECTION START 

    Will CONSULT be used?

    Will CONSULT be used?

    YES

    GO TO 2.

    NO

    GO TO 5.

  2. PRECONDITIONING 
    1. Turn ignition switch OFF and wait at least 10 seconds.
    2. Turn ignition switch ON.
    3. Turn ignition switch OFF and wait at least 10 seconds.

    GO TO 3.

  3. CHECK PNP SIGNAL 

    SYMBOL WITH CONSULT

    1. Turn ignition switch ON.
    2. Select "P/N POSI SW" in "DATA MONITOR" mode with CONSULT. Then check the "P/N POSI SW" signal under the following conditions.

      Position (Selector lever)

      Known-good signal

      N or P position

      ON

      Except above position

      OFF

    Is the inspection result normal?

    YES

    GO TO 4.

    NO

    Refer to DTC Diagnosis Procedure .

  4. PERFORM DTC CONFIRMATION PROCEDURE 
    1. Select "DATA MONITOR" mode with CONSULT.
    2. Start engine and warm it up to normal operating temperature.
    3. Maintain the following conditions for at least 50 consecutive seconds.
      CAUTION: Always drive vehicle at a safe speed.
      For USA and Canada

      ENG SPEED

      1, 000 - 6, 375 rpm

      COOLAN TEMP/S

      More than 67 deg.C (152.6 deg.F)

      B/FUEL SCHDL

      2.0 - 31.8 msec

      VHCL SPEED SE

      More than 64 km/h (40 mph)

      Selector lever

      Suitable position

      Except for USA and Canada

      ENG SPEED

      1, 000 - 6, 375 rpm

      COOLAN TEMP/S

      More than 60 deg.C (140 deg.F)

      B/FUEL SCHDL

      2.0 - 31.8 msec

      VHCL SPEED SE

      More than 64 km/h (40 mph)

      Selector lever

      Suitable position

    4. Check 1st trip DTC.

    Is 1st trip DTC detected?

    YES

    Refer to DTC Diagnosis Procedure .

    NO

    INSPECTION END

  5. PERFORM COMPONENT FUNCTION CHECK 

    SYMBOL WITH GST

    Perform Component Function Check. Refer to Component Function Check .

    NOTE: Use Component Function Check to check the overall function of the park/neutral position (PNP) signal circuit. During this check, a 1st trip DTC might not be confirmed.

    Is the inspection result normal?

    YES

    INSPECTION END

    NO

    Refer to DTC Diagnosis Procedure .