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Home >> Nissan-Datsun >> 2009 >> Versa Base, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - DTCS P0500 To P2A00 >> DTC P2101 Electric Throttle Control Function >> Diagnosis Procedure
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Diagnosis Procedure

  1. CHECK GROUND CONNECTIONS
    1. Turn ignition switch OFF.
    2. Loosen and retighten ground screw on the body.

      Refer to "GROUND INSPECTION ".

      Fig 1: Identifying Ground Connections Components
      G05932923Courtesy of NISSAN MOTOR CO., U.S.A.

      OK or NG 

      OK : GO TO 2.

      NG : Repair or replace ground connections.

  2. CHECK THROTTLE CONTROL MOTOR RELAY INPUT SIGNAL CIRCUIT-I

    Check voltage between ECM terminal 2 and ground under the following conditions with CONSULT-III or tester.

    VOLTAGE REFERENCE CHART

    Ignition switch Voltage
    OFF Approximately 0V
    ON Battery voltage (11 - 14V)
    Fig 2: Checking Voltage Between ECM Terminal 2 And Ground
    G04925554Courtesy of NISSAN MOTOR CO., U.S.A.

    OK or NG 

    OK : GO TO  10.

    NG : GO TO 3.

  3. CHECK THROTTLE CONTROL MOTOR RELAY INPUT SIGNAL CIRCUIT-II
    1. Turn ignition switch OFF.
    2. Disconnect ECM harness connector.
    3. Disconnect IPDM E/R harness connector E43.
    4. Check continuity between ECM terminal 2 and IPDM E/R terminal 8.

      Refer to Wiring Diagram.

      Continuity should exist  .

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

      OK or NG 

      OK : GO TO  5.

      NG : GO TO 4.

  4. DETECT MALFUNCTIONING PART

    Check the following.

    • Harness connectors E8, F8
    • Harness for open or short between ECM and IPDM E/R

      Repair open circuit or short to ground or short to power in harness or connectors.

  5. CHECK THROTTLE CONTROL MOTOR RELAY POWER SUPPLY CIRCUIT-I
    1. Reconnect all harness connectors disconnected.
    2. Check voltage between ECM terminal 15 and ground with CONSULT- III or tester.

      Voltage: Battery voltage 

      OK or NG 

      OK : GO TO  9.

      NG : GO TO 6.

      Fig 3: Checking Voltage Between ECM Terminal 15 And Ground
      G04925553Courtesy of NISSAN MOTOR CO., U.S.A.
  6. CHECK THROTTLE CONTROL MOTOR RELAY POWER SUPPLY CIRCUIT-II
    1. Disconnect ECM harness connector.
    2. Disconnect IPDM E/R harness connector E46.
    3. Check harness continuity between ECM terminal 15 and IPDM E/R terminal 46.

      Refer to Wiring Diagram.

      Continuity should exist  .

    4. Also check harness for short to ground and short to power.

      OK or NG 

      OK : GO TO  8.

      NG : GO TO 7.

  7. DETECT MALFUNCTIONING PART

    Check the following.

    • Harness connectors E8, F8
    • Harness for open or short between ECM and IPDM E/R

      Repair open circuit or short to ground or short to power in harness or connectors.

  8. CHECK FUSE
    1. Disconnect 15A fuse.
    2. Check 15A fuse for blown.

      OK or NG 

      OK : GO TO 9.

      NG : Replace 15A fuse.

  9. CHECK INTERMITTENT INCIDENT

    Refer to TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT .

    OK or NG 

    OK : Replace IPDM E/R. Refer to REMOVAL AND INSTALLATION OF IPDM E/R .

    NG : Repair or replace harness or connectors.

  10. CHECK THROTTLE CONTROL MOTOR OUTPUT SIGNAL CIRCUIT FOR OPEN OR SHORT
    1. Turn ignition switch OFF.
    2. Disconnect electric throttle control actuator (1) harness connector.
      • <== : Vehicle front
    3. Disconnect ECM harness connector.
    4. Check harness continuity between the following terminals.

      Refer to Wiring Diagram.

      CONTINUITY REFERENCE CHART

      Electric throttle control actuator terminal ECM terminal Continuity
      5 1 Should not exist.
      4 Should exist.
      6 1 Should exist.
      4 Should not exist.
      Fig 4: Identifying Electric Throttle Control Actuator Harness Connector
      G05932617Courtesy of NISSAN MOTOR CO., U.S.A.
    5. Also check harness for short to ground and short to power.

      OK or NG 

      OK : GO TO 11.

      NG : Repair or replace.

  11. CHECK ELECTRIC THROTTLE CONTROL ACTUATOR VISUALLY
    1. Remove the intake air duct.
    2. Check if foreign matter is caught between the throttle valve (1) and the housing.
      • <== : Vehicle front

        OK or NG 

        OK : GO TO 12.

        NG : Remove the foreign matter and clean the electric throttle control actuator inside.

        Fig 5: Identifying Throttle Valve And Housing
        G05932890Courtesy of NISSAN MOTOR CO., U.S.A.
  12. CHECK THROTTLE CONTROL MOTOR

    Refer to "COMPONENT INSPECTION ".

    OK or NG 

    OK : GO TO 13.

    NG : GO TO  14.

  13. CHECK INTERMITTENT INCIDENT

    Refer to TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT .

    OK or NG 

    OK : GO TO 14.

    NG : Repair or replace harness or connectors.

  14. REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR
    1. Replace the electric throttle control actuator.
    2. Perform "THROTTLE VALVE CLOSED POSITION LEARNING ".
    3. Perform "IDLE AIR VOLUME LEARNING ".

      INSPECTION END 

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