FixVault
Home › Nissan-Datsun › 2010 › Cube Base › Repair and Diagnosis › Engine Performance › System › Engine Control System - DTCS P0643 To P2A00 › P2100, P2103 Throttle Control Motor Relay › Diagnosis Procedure

Diagnosis Procedure

  1. CHECK THROTTLE CONTROL MOTOR RELAY POWER SUPPLY CIRCUIT-I
    1. Turn ignition switch OFF.
    2. Check the voltage between ECM harness connector and ground.
    TERMINAL VOLTAGE REFERENCE CHART

    ECM Ground Voltage
    Connector Terminal
    F7 15 Ground Battery voltage

    OK or NG 

    OK: GO TO  5.

    NG: GO TO 2.

  2. CHECK THROTTLE CONTROL MOTOR RELAY POWER SUPPLY CIRCUIT-II
    1. Disconnect ECM harness connector.
    2. Disconnect IPDM E/R harness connector.
    3. Check the continuity between ECM harness connector and IPDM E/R harness connector.
      TERMINAL CONTINUITY REFERENCE CHART

      ECM IPDM E/R Continuity
      Connector Terminal Connector Terminal
      F7 15 E15 57 Existed
    4. Also check harness for short to ground and short to power.

    Is the inspection result normal? 

    YES: GO TO  4.

    NO: GO TO 3.

  3. DETECT MALFUNCTIONING PART

    Check the following.

    • Harness connectors E8, F1
    • 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.

  4. CHECK FUSE
    1. Disconnect 15 A fuse (No. 64) from IPDM E/R.
    2. Check 15 A fuse for blown.

    Is the inspection result normal? 

    YES: GO TO  6.

    NO: Replace 15 A fuse.

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

    Check the voltage between ECM harness connector and ground under the following conditions.

    TERMINAL VOLTAGE REFERENCE CHART

    ECM Ground Condition Voltage
    Connector Terminal
    F7 2 Ground Ignition switch: OFF Approximately 0 V
    Ignition switch: ON Battery voltage

    OK or NG 

    OK: GO TO  8.

    NG: GO TO 6.

  6. 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.
    4. Check the continuity between ECM harness connector and IPDM E/R harness connector.
      TERMINAL CONTINUITY REFERENCE CHART

      ECM IPDM E/R Continuity
      Connector Terminal Connector Terminal
      F7 2 E15 54 Existed
    5. Also check harness for short to ground and short to power.

    Is the inspection result normal? 

    YES: GO TO  8.

    NO: GO TO 7.

  7. DETECT MALFUNCTIONING PART

    Check the following.

    • Harness connectors E8, F1
    • 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 INTERMITTENT INCIDENT

    Refer to "INTERMITTENT INCIDENT ".

    Is the inspection result normal? 

    YES: Replace IPDM E/R.

    NO: Repair or replace harness or connectors.

About FixVault