Service manual

90-898303

4-18

Flywheel

Flywheel has 54 teeth under the flywheel ring gear which the crank position

sensor uses to provide engine rpm and crankshaft position information to the

ECM.

Crank Position Sensor

Monitors 54 teeth on flywheel thus determining crankshaft position and sends

crankshaft position angle and engine speed signals to ECM. If crank position

sensor should fail, engine will stop running.

a) Crank Position Sensor

b) Crank Position Sensor Connector

RESISTANCE TEST

1. Visually inspect the sensor. The tip should be flush across the end. If not,

replace the sensor.

NOTE: There is a magnet mounted in the end of the sensor. If the magnet is

missing the sensor will not operate properly.

2. Visually inspect the pins at the sensor and the wires coming from the

connector. Look for broken, bent, or corroded pins at the sensor and loose,

broken, or corroded wires at the connector. Replace components as

necessary.

3. Perform a resistance test. If the sensor fails this test, replace the sensor.

NOTE: Refer to appropriate service manual for test procedure and

specifications.

Notes

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