| CAUTION | If ECM replacement is instructed in following testing, always ensure ECM connectors and ground circuit are okay. If either are suspect, repair and repeat testing to confirm ECM malfunction. |
Circuit Description
The CKP sensor is a pick-up coil mounted next to crankshaft pulley. A 34-tooth signal plate is mounted to crankshaft. DTC is set when there is a deviation in CKP sensor signal and Camshaft Position (CMP) sensor signal. Possible causes are
- Valve timing.
- Distributor installation.
- ECM.