LEMON Manuals: Even more car manuals for everyone
Home >> Nissan-Datsun >> 2004 >> Altima S, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 1184 (Engine Control System - DTCS P0643 To P2A03 (VQ40DE)) >> DTC P2100, P2103: Throttle Control Motor Relay >> Diagnosis Procedure

Diagnosis Procedure

WARNING: This page is about a different car, the 2012 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 or tester.

    Voltage: Battery voltage 

    OK or NG 

    OK: GO TO  4.

    NG: GO TO 2.

    Fig 1: Checking Voltage Between ECM Terminal 104 And Ground Using Tester
    G08170733Courtesy of NISSAN NORTH AMERICA, INC.
  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 20 A fuse (No. 52). For the fuse arrangement, refer to "IPDM E/R TERMINAL ARRANGEMENT ".
    2. Check if 20A fuse is 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 or tester.
    Ignition switch Voltage
    OFF Approximately 0V
    ON Battery voltage (11 - 14V)

    OK or NG 

    OK: GO TO  7.

    NG: GO TO 5.

    Fig 2: Checking Voltage Between ECM Terminal 3 And Ground Using Tester
    G08170734Courtesy of NISSAN NORTH AMERICA, INC.
  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 "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.

scientia non olet · About LEMON Manuals