Engine Speed Sensor: Service and Repair

ENGINE SPEED SENSOR REPLACEMENT

Engine Speed Sensor:

NOTE: Correct mounting position of Engine Speed Sensor is needed to insure ECM receives accurate information. The mounting bracket for the Engine Speed Sensor can be moved in the slots. The position of bracket is set at the factory and must not be altered. If the bolts have been inadvertently loosened and the bracket thus moved, it should be reset to the correct position.

IF:

^ Bracket has moved.
^ Engine Speed Sensor is being replaced.
^ Engine Speed Sensor has been replaced.
^ Engine Speed Sensor signal faulty.
^ ECM trouble code indicates Engine Speed Sensor.

Bracket Position Should Be Checked Or Reset.

REPLACEMENT PROCEDURE

TDC Marks:

1. Position crankshaft at TDC by aligning TDC MARKS on crankshaft pulley and front engine cover as shown.

Ignition Reference Sensor:

2. Remove Crankshaft Position Sensor located on the left side of engine block near oil pan.

^ Notch in crankshaft for TDC can be seen or felt through CKP Sensor hole.

Crankshaft Positioning Tool #3242:

3. Insert crankshaft positioning fixture #3242 into hole of removed CKP Sensor and tighten slightly.
4. Remove Engine Speed Sensor heat shield.
5. Remove Engine Speed Sensor.
6. Loosen Engine Speed Sensor mounting bracket bolts.

Engine Speed Sensor Mounting Bracket Positioning Tool #3308:

7. Insert bracket adjusting tool #3308 in place of Engine Speed Sensor.

^ Adjusting tool must engage in ring gear.

8. Once adjusting tool is properly positioned, tighten bracket bolts.
9. Remove bracket adjusting tool #3308.
10. Install Engine Speed Sensor and heat shield.
11. Remove crankshaft positioning fixture #3242.
12. Reinstall Crankshaft Position Sensor.