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Home › Infiniti › 2012 › G25 Base › Repair and Diagnosis › External Pages › Different car › Section 15 (Automatic Transmission) › Electric Shift › DTC/Circuit Diagnosis › DTC P1897: Encoder Error › Diagnosis Procedure

Diagnosis Procedure

WARNING: This page is about a different car, the 2011 Nissan Leaf. However, it is still accessible from the selected car via links, so may be relevant.
  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.
    VOLTAGE REFERENCE CHART

    Parking actuator vehicle side harness connector Ground Condition Voltage (Approx.)
    Connector Terminal
    F4 7 Ground Power switch ON 5 V

    Is the inspection result normal? 

    YES: GO TO 2.

    NO: GO TO  4.

  2. CHECK HARNESS BETWEEN ELECTRIC SHIFT CONTROL MODULE AND ENCODER
    1. Power switch OFF.
    2. Disconnect the electric shift control module connector.
    3. Check the continuity between electric shift control module vehicle side harness connector terminals and parking actuator vehicle side harness connector terminals.
      CONTINUITY REFERENCE CHART

      Electric shift control module vehicle side harness connector Parking actuator vehicle side harness connector Continuity
      Connector Terminal Connector Terminal
      M58 15 F4 6 Existed
      23 8
      24 5
    4. Check the continuity between electric shift control module vehicle side harness connector terminals and ground.
    CONTINUITY REFERENCE CHART

    Electric shift control module vehicle side harness connector Ground Continuity
    Connector Terminal
    M58 15 Ground Not existed
    23
    24

    Is the inspection result normal? 

    YES: GO TO 3.

    NO: Repair or replace damaged parts.

  3. CHECK INTERMITTENT INCIDENT

    Refer to "INTERMITTENT INCIDENT ".

    Is the inspection result normal? 

    YES: Replace the reduction gear due to malfunction in the encoder (parking actuator). Refer to "REMOVAL AND INSTALLATION ".

    NO: Repair or replace damaged parts.

  4. CHECK HARNESS BETWEEN ELECTRIC SHIFT CONTROL MODULE AND ENCODER
    1. Power switch OFF.
    2. Disconnect the electric shift control module connector.
    3. Check the continuity between electric shift control module vehicle side harness connector terminal and parking actuator vehicle side harness connector terminal.
      CONTINUITY REFERENCE CHART

      Electric shift control module vehicle side harness connector Parking actuator vehicle side harness connector Continuity
      Connector Terminal Connector Terminal
      M58 16 F4 7 Existed
    4. Check the continuity between electric shift control module vehicle side harness connector terminals and ground.
    CONTINUITY REFERENCE CHART

    Electric shift control module vehicle side harness connector Ground Continuity
    Connector Terminal
    M58 16 Ground Not existed

    Is the inspection result normal? 

    YES: Check intermittent incident. Refer to "INTERMITTENT INCIDENT ".

    NO: Repair or replace damaged parts.

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