The Crankshaft Position (CKP) Sensor provides a signal through the ignition module which the ECM uses as a reference to calculate rpm and crankshaft position.
- Disconnect the CKP sensor harness. Connect an LED test light between battery ground and CKP harness terminal A.
- With the ignition ON and the engine off, verify that the test light illuminates.
- If not as specified, repair or replace the fuse and/or wiring.
- Carefully connect the test light between CKP harness terminal A and B. Verify that the test light illuminates.
- If not as specified, repair the CKP harness ground circuit (terminal B).
- Turn the ignition OFF and disconnect the test light.
- Next, connect suitable jumper wires between the CKP sensor and CKP sensor harness. Connect a duty cycle meter to the jumper wire corresponding to CKP terminal C and battery ground.
- Crank the engine and verify that the duty cycle signal is between 40-60%.
- If it is not as specified, the CKP sensor may be faulty.
- Next, connect a AC volt meter to the jumper wire corresponding to CKP terminal C and battery ground.
- Crank the engine and verify that the AC voltage signal is at least 10.0 volts.
- If not as specified the CKP sensor may be faulty.
REMOVAL & INSTALLATION
See Figure 1
- Disconnect the negative battery cable.
- Detach the sensor harness connector at the sensor.
- Unfasten the retaining bolt, then remove the sensor from the front cover. Inspect the sensor O-ring for wear, cracks or leakage and replace if necessary.
- Lubricate the O-ring with clean engine oil, then place on the sensor. Install the sensor into the front cover.
- Tighten the retaining bolt.
- Attach the sensor harness connector.
- Connect the negative battery cable.