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Home >> Nissan-Datsun >> 2021 >> NV2500 HD S >> Repair and Diagnosis >> External Pages >> Different car >> Section 623 (Engine Control System (DTC/Circuit Diagnosis) (13 Of 17)) >> DTC/Circuit Diagnosis >> DTC P2101: Electric Throttle Control Function >> Diagnosis Procedure

Diagnosis Procedure

WARNING: This page is about a different car, the 2020 Infiniti QX60. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK DTC PRIORITY 

    If DTC P2101 is displayed with DTC P2100 or P2119, first perform the confirmation procedure for DTC P2100 or P2119.

    Is DTC P2100 or P2119 detected?

    YES

    Perform diagnosis of applicable.

    NO

    GO TO 2.

  2. 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

    F79

    123

    E32

    204

    Ignition switch: OFF

    0 V

    Ignition switch: ON

    Battery voltage

    Is the inspection result normal?

    YES

    GO TO 5.

    NO

    GO TO 3.

  3. 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.

      ECM

      IPDM E/R

      Continuity

      Connector

      Terminal

      Connector

      Terminal

      F79

      123

      F24

      65

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

    Is the inspection result normal?

    YES

    GO TO 4.

    NO

    Repair or replace error-detected parts.

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

      ECM

      IPDM E/R

      Continuity

      Connector

      Terminal

      Connector

      Terminal

      F79

      96

      F19

      57

      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.

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

      Electric throttle control actuator

      ECM

      Continuity

      Connector

      Terminal

      Connector

      Terminal

      F50

      2

      F79

      150

      Existed

      149

      Not existed

      1

      150

      Not existed

      149

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

    Is the inspection result normal?

    YES

    GO TO 6.

    NO

    Repair or replace error-detected parts.

  6. CHECK ELECTRIC THROTTLE CONTROL ACTUATOR VISUALLY 
    1. Remove air duct hose and resonator assembly. Refer to AIR CLEANER AND AIR DUCT .
    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 7.

    NO

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

  7. CHECK THROTTLE CONTROL MOTOR 

    Check the throttle control motor. Refer to Component Inspection .

    Is the inspection result normal?

    YES

    INSPECTION END

    NO

    Replace electric throttle control actuator. Refer to INTAKE MANIFOLD COLLECTOR .

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