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Home >> Nissan-Datsun >> 2004 >> Altima S, Standard >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 6 (Engine Control System - 3.5L) >> DTC P1124, P1126: Throttle Control Motor Relay >> Diagnostic Procedure

Diagnostic Procedure

WARNING: This page is about a different variant/trim than selected.
  1. CHECK THROTTLE CONTROL MOTOR RELAY POWER SUPPLY CIRCUIT-I 
    1. Turn ignition switch OFF.
    2. Check voltage between ECM terminal 26 and ground with CONSULT-11 or tester.

      Voltage: Battery voltage 

    OK or NG

    1. OK : GO TO  5.
    2. NG : GO TO 2.
      Fig 1: Checking Voltage Between Terminal 26 And Ground
      G02885720Courtesy of NISSAN MOTOR CO., U.S.A.
  2. CHECK THROTTLE CONTROL MOTOR RELAY POWER SUPPLY CIRCUIT-II 
    1. Disconnect ECM harness connector.
    2. Disconnect IPDM E/R harness connector E121.
    3. Check continuity between ECM terminal 26 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

    1. OK : GO TO  4.
    2. NG : GO TO 3.
  3. DETECT MALFUNCTIONING PART 

    Check the following.

    • Harness connectors E19, F33
    • Harness for open or short between ECM and IPDM E/R
    1. :Repair open circuit or short to ground or short to power in harness or connectors.
  4. CHECK FUSE 
    1. Disconnect 10A fuse.
    2. Check 10A fuse for blown.

    OK or NG

    1. OK : GO TO  8.
    2. NG : Replace 10A fuse.
  5. CHECK THROTTLE CONTROL MOTOR RELAY INPUT SIGNAL CIRCUIT-I 

    Check voltage between ECM terminal 102 and ground under the following conditions with CONSULT-II or tester.

    IGNITION SWITCH AND ECM TERMINALS VOLTAGE

    Ignition switch Voltage
    OFF Approximately 0V
    ON Battery voltage (11 - 14V)

    OK or NG

    1. OK : GO TO  8.
    2. NG : GO TO 6.
      Fig 2: Checking Voltage Between Terminal 102 And Ground
      G02885721Courtesy of NISSAN MOTOR CO., U.S.A.
  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 E124.
    4. Check continuity between ECM terminal 102 and IPDM E/R terminal 42.

      Refer to Wiring Diagram .

      Continuity should exist. 

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

    OK or NG

    1. OK : GO TO  8.
    2. NG : GO TO 7.
  7. DETECT MALFUNCTIONING PART 

    Check the following.

    • Harness connectors E20, F32
    • Harness for open or short between ECM and IPDM E/R
    1. :Repair open circuit or short to ground or short to power in harness or connectors.
  8. CHECK INTERMITTENT INCIDENT 

    Refer to "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT ".

    OK or NG

    1. OK : Replace IPDM E/R. Refer to "IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM) ".
    2. NG : Repair or replace harness or connectors.
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