| CAUTION | If ECM replacement is instructed in following testing, always ensure ECM harness connector and ground circuit are okay. If either are suspect, repair and repeat testing to confirm ECM malfunction. If ECM is replaced, ECM must be programmed with proper ignition key code for engine immobilizer system. For programming procedures, see COMPUTER RELEARN PROCEDURES article in GENERAL INFORMATION. |
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 P0335 is set if no cranking signal is received by ECM from CKP sensor. DTC P0335 is also set if no signal is received by ECM from CKP sensor with engine speed of 600 RPM or more. DTC P1335 is set if no engine running signal is received by ECM from CKP sensor with engine speed of 1000 RPM or more. Possible causes are
- Open or short in CKP sensor circuit.
- Faulty CKP sensor.
- Faulty starter.
- Faulty ECM.
Diagnostic Aids
Using scan tool, read freeze frame data. Freeze frame records engine conditions when malfunction is detected.