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Home >> Infiniti >> 2017 >> QX80 Base, AWD >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Control System (DTCS) (3 Of 4) >> DTC/Circuit Diagnosis >> DTC P0850: PNP Switch >> DTC Logic >> DTC Confirmation Procedure
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DTC Confirmation Procedure

  1. INSPECTION START

    Will CONSULT be used?

    Will CONSULT be used?

    YES 

    GO TO STEP 2  .

    NO 

    GO TO STEP  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 STEP 3  .

  3. CHECK PNP SIGNAL

    G-20 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 STEP 4  .

    NO 

    Go to 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°C (152.6°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°C (140°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 

    Go to DIAGNOSIS PROCEDURE .

    NO 

    INSPECTION END

  5. PERFORM COMPONENT FUNCTION CHECK

    NSM020 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 

    Go to DIAGNOSIS PROCEDURE .