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Home >> Nissan-Datsun >> 2019 >> Altima Edition ONE >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 10 (Engine Control System (DTC/Circuit Diagnosis) (Pr25DD) (3 Of 4)) >> DTC/Circuit Diagnosis >> P0850 PNP Switch >> DTC Diagnosis Procedure >> PR25DD engine

PR25DD engine

WARNING: This page is about a different variant/trim than selected.
  1. CHECK TRANSMISSION RANGE SWITCH POWER SUPPLY 
    1. Turn ignition switch OFF.
    2. Disconnect transmission range switch harness connector.
    3. Turn ignition switch ON.
    4. Check the voltage between transmission range switch harness connector and ground.

      +

      -

      Voltage

      Transmission range switch

      Connector

      Terminal

      F85

      7

      Ground

      Battery voltage

      4

    Is the inspection result normal?

    YES

    GO TO 3.

    NO

    GO TO 2.

  2. CHECK TRANSMISSION RANGE SWITCH POWER SUPPLY CIRCUIT 
    1. Turn ignition switch OFF.
    2. Disconnect IPDM E/R harness connector.
    3. Check the continuity between transmission range switch harness connector and IPDM E/R harness connector.

      +

      -

      Continuity

      Transmission range switch

      IPDM E/R

      Connector

      Terminal

      Connector

      Terminal

      F85

      7

      F10

      70

      Existed

      4

    4. Also check harness for short to ground.

    Is the inspection result normal?

    YES

    Perform the trouble diagnosis for power supply circuit.

    NO

    Repair or replace error-detected parts.

  3. CHECK TRANSMISSION RANGE SWITCH SIGNAL CIRCUIT 
    1. Turn ignition switch OFF.
    2. Disconnect ECM harness connector.
    3. Check the continuity between transmission range switch harness connector and ECM harness connector.

      +

      -

      Continuity

      Transmission range switch

      ECM

      Connector

      Terminal

      Connector

      Terminal

      F85

      10

      F91

      15

      Existed

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

    Is the inspection result normal?

    YES

    GO TO 4.

    NO

    Repair or replace error-detected parts.

  4. CHECK TRANSMISSION RANGE SWITCH 

    Check the transmission range switch. Refer to Component Inspection .

    Is the inspection result normal?

    YES

    Check intermittent incident. Refer to Inspection .

    NO

    Replace transmission range switch. Refer to Removal & Installation .