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Home >> Nissan-Datsun >> 2021 >> NV2500 HD S >> Repair and Diagnosis >> External Pages >> Different car >> Section 476 (Engine Control System (DTC/Circuit Diagnosis) (3 Of 3)) >> DTC/Circuit Diagnosis >> DTC P2101: Electric Throttle Control Function >> DTC Diagnosis Procedure

DTC Diagnosis Procedure

WARNING: This page is about a different car, the 2019 Nissan NV3500 HD, 2019 Nissan NV2500 HD, and 2019 Nissan NV1500. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK THROTTLE CONTROL MOTOR RELAY INPUT SIGNAL 

    Check the voltage between ECM harness connector terminals as per the following conditions.

    ECM

    Condition

    Voltage

    (Approx.)

    +

    -

    Connector

    Terminal

    Connector

    Terminal

    F54

    2

    E16

    152

    Ignition switch: OFF

    0 V

    Ignition switch: ON

    Battery voltage

    Is the inspection result normal?

    YES

    GO TO 4.

    NO

    GO TO 2.

  2. CHECK THROTTLE CONTROL MOTOR RELAY INPUT SIGNAL CIRCUIT 
    1. Turn ignition switch OFF.
    2. Disconnect ECM harness connector.
    3. Disconnect IPDM E/R harness connector.
    4. Check the continuity between ECM harness connector and IPDM E/R harness connector.

      +

      -

      Continuity

      ECM

      IPDM E/R

      Connector

      Terminal

      Connector

      Terminal

      F54

      2

      E119

      6

      Existed
    5. Also check harness for short to ground and to power.

    Is the inspection result normal?

    YES

    GO TO 3.

    NO

    Repair or replace error-detected parts.

  3. CHECK THROTTLE CONTROL MOTOR RELAY POWER SUPPLY CIRCUIT 
    1. Check the continuity between ECM harness connector and IPDM E/R harness connector.

      +

      -

      Continuity

      ECM

      IPDM E/R

      Connector

      Terminal

      Connector

      Terminal

      F54

      8

      E122

      47

      Existed
    2. 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.

  4. CHECK THROTTLE CONTROL MOTOR OUTPUT SIGNAL CIRCUIT 
    1. Turn ignition switch OFF.
    2. Disconnect electric throttle control actuator harness connector. Refer to Exploded View .
    3. Disconnect ECM harness connector.
    4. Check the continuity between electric throttle control actuator harness connector and ECM harness connector.

      +

      -

      Continuity

      Electric throttle control actuator

      ECM

      Connector

      Terminal

      Connector

      Terminal

      F50

      5

      F54

      3

      Not existed

      1

      Existed

      6

      3

      Existed

      1

      Not existed
    5. Also check harness for short to ground and to power.

    Is the inspection result normal?

    YES

    GO TO 5.

    NO

    Repair or replace error-detected parts.

  5. CHECK ELECTRIC THROTTLE CONTROL ACTUATOR VISUALLY 
    1. Remove the intake air duct. Refer to Exploded View .
    2. Check if foreign matter is caught between the throttle valve and the housing.
    GNSJSBIA2864Z-864Courtesy of NISSAN NORTH AMERICA, INC.

    Is the inspection result normal?

    YES

    GO TO 6.

    NO

    Remove the foreign matter and clean the electric throttle control actuator inside, then perform throttle valve closed position learning. Refer to Description .

  6. CHECK THROTTLE CONTROL MOTOR 

    Check the throttle control motor. Refer to Component Inspection .

    Is the inspection result normal?

    YES

    Check intermittent incident. Refer to Intermittent Incident .

    NO

    Replace electric throttle control actuator. Refer to Removal and Installation .

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