Camshaft Position Sensor: Testing and Inspection

Camshaft position sensor
1. Start engine and warm it up to the normal operating temperature.
2. Check voltage between ECM terminals (59) (POS) or (55), (58) (REF) (ECM terminal) and ground with DC range.

CAUTION: Do not use ECM ground terminals when measuring voltage
Doing so may result in damage to the ECM's transistor. Use a ground other than ECM terminals such as the body ground.

If NG, replace camshaft position sensor.