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Home >> Nissan-Datsun >> 2020 >> Leaf S Plus >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Automatic Transmission (DTCS) >> DTC Diagnosis >> Shift (Electric Shift Module) >> DTC P1897: Encoder Error >> DTC Diagnosis Procedure

DTC Diagnosis Procedure

  1. CHECK ENCODER POWER SUPPLY CIRCUIT 
    1. Power switch OFF.
    2. Disconnect the parking actuator connector.
    3. Check the voltage between parking actuator vehicle side harness connector terminal and ground.

      Parking actuator

      Ground

      Condition

      Voltage

      (Approx.)

      Connector

      Terminal

      F4

      9

      Ground

      Power switch ON

      5 V

    Is the inspection result normal?

    YES

    GO TO 2.

    NO

    GO TO 4.

  2. CHECK HARNESS BETWEEN VCM AND ENCODER 
    1. Power switch OFF.
    2. Disconnect the VCM connector.
    3. Check the continuity between VCM vehicle side harness connector terminals and parking actuator vehicle side harness connector terminals.

      VCM

      Parking actuator

      Continuity

      Connector

      Terminal

      Connector

      Terminal

      E62

      114

      F4

      3

      Yes

      113

      5

      138

      8

    4. Check the continuity between VCM vehicle side harness connector terminals and ground.

      VCM

      Ground

      Continuity

      Connector

      Terminal

      E62

      114

      Ground

      No

      113

      138

    Is the inspection result normal?

    YES

    GO TO 3.

    NO

    Repair or replace damaged parts.

  3. CHECK INTERMITTENT INCIDENT 

    Refer to Inspection .

    Is the inspection result normal?

    YES

    Replace the reduction gear due to malfunction in the encoder (parking actuator). Refer to REDUCTION GEAR : Removal & Installation .

    NO

    Repair or replace damaged parts.

  4. CHECK HARNESS BETWEEN VCM AND ENCODER 
    1. Power switch OFF.
    2. Disconnect the VCM connector.
    3. Check the continuity between VCM vehicle side harness connector terminal and parking actuator vehicle side harness connector terminal.

      VCM

      Parking actuator

      Continuity

      Connector

      Terminal

      Connector

      Terminal

      E62

      88

      F4

      9

      Yes

    4. Check the continuity between VCM vehicle side harness connector terminals and ground.

      VCM

      Ground

      Continuity

      Connector

      Terminal

      E62

      88

      Ground

      No

    Is the inspection result normal?

    YES

    Replace the VCM due to malfunction in the electric shift control module built in VCM. Refer to VCM : Removal & Installation .

    NO

    Repair or replace damaged parts.