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HOMESERVICE MANUALSINFINITI2019Q70 3.7 LUXE, AWDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT VARIANT/TRIMSECTION 11 (ENGINE CONTROL SYSTEM (5.6L) (DTC/CIRCUIT DIAGNOSIS) (5 OF 9))DTC/CIRCUIT DIAGNOSISDTC P0850: PNP SWITCHDTC LOGICDTC CONFIRMATION PROCEDURE
2019 Infiniti Q70 3.7 Luxe, AWD

DTC Confirmation Procedure

2019 Infiniti Q70 3.7 Luxe, AWDSECTION DTC Confirmation Procedure
WARNING: This page is about a different variant/trim than selected.
  1. INSPECTION START 

    Will CONSULT be used?

    Will CONSULT be used?

    YES

    GO TO 2 .

    NO

    GO TO 5 .

  2. PRECONDITIONING 

    If DTC Confirmation Procedure has been previously conducted, always perform the following procedure before conducting the next test.

    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

    Proceed 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.

      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

    Proceed to 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

    Proceed to Diagnosis Procedure .

RENDER: 1.0x

NO RELATED

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.