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Home › Infiniti › 2004 › G35 x › Repair and Diagnosis › Engine Performance › System › 2004 - Engine Control System - Sedan › Trouble Diagnosis › DTC P2135: TP Sensor › Diagnostic Procedure

Diagnostic Procedure

  1. CHECK GROUND CONNECTIONS 
    1. Turn ignition switch OFF.
    2. Loosen and retighten two ground screws on the body. Refer to Ground Inspection .
    Fig 1: Loosening/Tightening Ground Screws On Body
    G00733034Courtesy of NISSAN MOTOR CO., U.S.A.

    OK or NG

    1. OK: GO TO 2.
    2. NG: Repair or replace ground connections.
  2. CHECK THROTTLE POSITION SENSOR POWER SUPPLY CIRCUIT-I 
    1. Disconnect electric throttle control actuator harness connector.
    2. Turn ignition switch ON.
      Fig 2: Locating Electric Throttle Control Actuator
      G00733035Courtesy of NISSAN MOTOR CO., U.S.A.
    3. Check voltage between electric throttle control actuator terminal 1 and ground with CONSULT-II or tester.
      1. Voltage: Approximately 5V 

    OK or NG

    1. OK: GO TO  7.
    2. NG: GO TO 3.
    Fig 3: Checking Voltage Between Electric Throttle Control Actuator Terminal 1 And Ground
    G00733036Courtesy of NISSAN MOTOR CO., U.S.A.
  3. CHECK THROTTLE POSITION SENSOR POWER SUPPLY CIRCUIT-II 
    1. Turn ignition switch OFF.
    2. Disconnect ECM harness connector.
    3. Check harness continuity between electric throttle control actuator terminal 1 and ECM terminal 47.

      Refer to Wiring Diagram.

      1. Continuity should exist. 

    OK or NG

    1. OK: GO TO 4.
    2. NG: Repair or replace open circuit.
  4. CHECK THROTTLE POSITION SENSOR POWER SUPPLY CIRCUIT-III 

    Check harness for short to power and short to ground, between the following terminals.

    Fig 4: ECM Terminals & Sensor Terminals Reference Table
    G00733037Courtesy of NISSAN MOTOR CO., U.S.A.

    OK or NG

    1. OK: GO TO 5.
    2. NG: Repair short to ground or short to power in harness or connectors.
  5. CHECK APP SENSOR 

    Refer to Component Inspection .

    OK or NG

    1. OK: GO TO  11.
    2. NG: GO TO 6.
  6. REPLACE ACCELERATOR PEDAL ASSEMBLY 
    1. Replace accelerator pedal assembly.
    2. Perform Accelerator Pedal Released Position Learning .
    3. Perform Throttle Valve Closed Position Learning .
    4. Perform Idle Air Volume Learning .
      1. : INSPECTION END 
  7. CHECK THROTTLE POSITION SENSOR GROUND CIRCUIT FOR OPEN AND SHORT 
    1. Turn ignition switch OFF.
    2. Disconnect ECM harness connector.
    3. Check harness continuity between electric throttle control actuator terminal 5 and ECM terminal 66.

      Refer to Wiring Diagram.

      1. Continuity should exist. 
    4. Also check harness for short to ground and short to power.

    OK or NG

    1. OK: GO TO 8.
    2. NG: Repair open circuit or short to ground or short to power in harness or connectors.
  8. CHECK THROTTLE POSITION SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT 
    1. Check harness continuity between ECM terminal 50 and electric throttle control actuator terminal 4, ECM terminal 69 and electric throttle control actuator terminal 2.

      Refer to Wiring Diagram.

      1. Continuity should exist. 
    2. Also check harness for short to ground and short to power.

    OK or NG

    1. OK: GO TO 9.
    2. NG: Repair open circuit or short to ground or short to power in harness or connectors.
  9. CHECK THROTTLE POSITION SENSOR 

    Refer to Component Inspection .

    OK or NG

    1. OK: GO TO  11.
    2. NG: GO TO 10.
  10. 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 .
      1. : INSPECTION END 
  11. CHECK INTERMITTENT INCIDENT 

    Refer to TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT .

    1. : INSPECTION END 
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