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Home >> Nissan-Datsun >> 2021 >> NV2500 HD S >> Repair and Diagnosis >> External Pages >> Different car >> Section 219 (Engine Control System (DTCS) (5.6L) (7 Of 8)) >> DTC/Circuit Diagnosis >> P2101 Electric Throttle Control Function >> Diagnosis Procedure

Diagnosis Procedure

WARNING: This page is about a different car, the 2018 Nissan Titan XD and 2018 Nissan Titan. 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, first perform the trouble diagnosis for DTC P2100.
    • If DTC P2101 is displayed with DTC P2119, first perform the trouble diagnosis for DTC P2119.

    Is applicable DTC detected?

    YES

    Perform diagnosis of applicable. Refer to DTC Index .

    NO

    GO TO 2 .

  2. CHECK THROTTLE CONTROL MOTOR RELAY INPUT SIGNAL CIRCUIT-I 
    1. Check the voltage between ECM harness connector and ground under the following conditions.

      ECM

      Ground

      Condition

      Voltage

      Connector

      Terminal

      F79

      111

      Ground

      Ignition switch: OFF

      Approx. 0 V

      Ignition switch: ON

      Battery voltage

    Is the inspection result normal?

    YES

    GO TO 4 .

    NO

    GO TO 3 .

  3. CHECK THROTTLE CONTROL MOTOR RELAY POWER SUPPLY 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.

      IPDM E/R

      ECM

      Continuity

      Connector

      Terminal

      Connector

      Terminal

      E119

      16

      F79

      99

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

    Is the inspection result normal?

    YES

    GO TO 4 .

    NO

    Repair or replace error-detected parts.

  4. CHECK THROTTLE CONTROL MOTOR RELAY INPUT SIGNAL CIRCUIT-II 
    1. Check the continuity between ECM harness connector and IPDM E/R harness connector.

      IPDM E/R

      ECM

      Continuity

      Connector

      Terminal

      Connector

      Terminal

      E119

      11

      F79

      111

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

    Is the inspection result normal?

    YES

    GO TO 5 .

    NO

    Perform the trouble diagnosis for IPDM E/R power supply circuit.

  5. CHECK THROTTLE CONTROL MOTOR OUTPUT SIGNAL CIRCUIT FOR OPEN OR SHORT 
    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

      5

      F79

      107

      Not existed

      108

      Existed

      6

      107

      Existed

      108

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

    Is the inspection result normal?

    YES

    GO TO 6 .

    NO

    Repair or replace.

  6. CHECK ELECTRIC THROTTLE CONTROL ACTUATOR VISUALLY 
    1. Remove the intake air duct.
    2. Check if foreign matter is caught between the throttle valve and the housing.

    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 

    Refer to Component Inspection .

    Is the inspection result normal?

    YES

    GO TO 8 .

    NO

    INSPECTION END

  8. REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR 
    1. Replace malfunction electric throttle control actuator. Refer to Removal and Installation .
    2. Perform Special Repair Requirement .

    INSPECTION END

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