Engine Speed Sensor: Service and Repair

REMOVAL
Before removing the sensor, note the position and routing of the sensor wiring harness. This routing must be maintained to prevent wiring from contacting belt or pulleys.

1. Disconnect the speed sensor pigtail harness from the main engine wiring harness near the front/top of engine.
2. Remove the clip bolts from the sensor pigtail wiring harness.

Engine Speed Sensor:

3. Remove the two speed sensor mounting nuts.
4. Remove the speed sensor and its mounting spacers from the vehicle.

INSTALLATION/ADJUSTMENT

Engine Speed Sensor:

1. The engine speed sensor uses a slotted hole on one side to adjust its depth. A brass (non-magnetic) feeler gauge must be used to adjust the sensor.

Sensor-to-vibration damper air gap is 1.25 mm (.049 in.) minimum to 1.30 mm (.051 in.) maximum.
2. Position speed sensor, its mounting spacers and two mounting nuts to the engine. Install mounting nuts finger tight.
3. Route sensor wiring harness behind engine pulleys. Install and tighten wiring harness clip bolts.
4. Place the feeler gauge between the sensor and the vibration dampener.

Engine Speed Sensor:

5. Gently seat (push down) the sensor until it contacts the feeler gauge. Be sure the sensor is not near either of the notches on the vibration damper. If sensor is adjusted at or near these notches, it will be damaged when engine is started.
6. Tighten sensor mounting nuts to 24 Nm (18 ft lb) torque.
7. Remove feeler gauge.
8. Connect the sensor electrical connector to the main engine wiring harness.