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Home >> Nissan-Datsun >> 2003 >> Sentra Limited >> Repair and Diagnosis >> External Pages >> Different car >> Section 2391 (Engine Control System - DTCS P1550 To P2A03) >> DTC P2100, P2103 Throttle Control Motor Relay >> Diagnostic Procedure

Diagnostic Procedure

WARNING: This page is about a different car, the 2007 Nissan Pathfinder. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK THROTTLE CONTROL MOTOR RELAY POWER SUPPLY CIRCUIT-I 
    1. Turn ignition switch OFF.
    2. Check voltage between ECM terminal 104 and ground with CONSULT-II or tester.

      Voltage: Battery voltage 

      Fig 1: Checking Voltage Between ECM Terminal 104 And Ground
      G04900691Courtesy of NISSAN NORTH AMERICA, INC.

    OK or NG 

    OK: GO TO  4.

    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 E122.
    3. Check continuity between ECM terminal 104 and IPDM E/R terminal 47.

      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 3.

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

  3. CHECK FUSE 
    1. Disconnect 20A fuse.
    2. Check 20A fuse for blown.

    OK or NG 

    OK: GO TO  7.

    NG: Replace 20A fuse.

  4. CHECK THROTTLE CONTROL MOTOR RELAY INPUT SIGNAL CIRCUIT-I 
    1. Check voltage between ECM terminal 3 and ground under the following conditions with CONSULT-II or tester.
      VOLTAGE CHART

      Ignition switch Voltage
      OFF Approximately 0V
      ON Battery voltage (11 - 14V)
      Fig 2: Checking Voltage Between ECM Connector 3 And Ground
      G04900692Courtesy of NISSAN NORTH AMERICA, INC.

    OK or NG 

    OK: GO TO  7.

    NG: GO TO 5.

  5. 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 E119.
    4. Check continuity between ECM terminal 3 and IPDM E/R terminal 6.

      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  7.

    NG: GO TO 6.

  6. DETECT MALFUNCTIONING PART 

    Check the following.

    • Harness connectors E2, F32
    • 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.

  7. CHECK INTERMITTENT INCIDENT 

    Refer to "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT ".

    OK or NG 

    OK: Replace IPDM E/R. Refer to "IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM) ".

    NG: Repair or replace harness or connectors.

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