Crankshaft Position Sensor: Service and Repair

1990 Mitsubishi Eclipse AWD L4-1997cc 2.0L DOHC TurboSECTION Service and Repair


NOTE: Crank Angle/TDC sensor are replaced as a complete unit.

1. Disconnect battery ground cable.
2. Place an alignment mark on sensor body and engine block, indicating position of sensor body in block or cylinder head. Place No. 1 cylinder to TDC of compression stroke. Do not use a sharp tool to place alignment marks on sensor body and engine block or cylinder head.
3. Disconnect wiring harness from sensor.
4. Remove sensor mounting nut, then the sensor assembly from engine.

Alignment Marks:





5. Reverse procedure to install. Align notch on drive blade with punch mark on housing, and install sensor in head.
6. Ensure alignment marks made are properly aligned. Ensure No. 1 cylinder is at TDC of compression stroke.
7. Check ignition timing, refer to ADJUSTMENT PROCEDURES section.
RENDER: 1.0x

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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.