2003 Infiniti I35FACTORY OEM SERVICE PROCEDURE

Throttle Position Sensor

WARNING: This page is about a different car, the 2004 Infiniti I35. However, it is still accessible from the selected car via links, so may be relevant.
  1. Reconnect all harness connectors disconnected.
  2. Perform THROTTLE VALVE CLOSED POSITION LEARNING  .
  3. Turn ignition switch ON.
    Fig 1: Displaying Throttle Positions Sensor Specifications
    G00787442Courtesy of NISSAN MOTOR CO., U.S.A.
  4. Set selector lever to D position.
  5. Check voltage between ECM terminals 83 (TP sensor 1), 84 (TP sensor 2) and engine ground under the following conditions.
    Fig 2: Identifying Terminal Voltage Conditions
    G00787443Courtesy of NISSAN MOTOR CO., U.S.A.
  6. If NG, replace electric throttle control actuator and go to the next step.
  7. Perform THROTTLE VALVE CLOSED POSITION LEARNING  .
  8. Perform IDLE AIR VOLUME LEARNING  .
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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.