01

Diagnostic Chart:

Trouble Code Number
- Scan tool 01
- MIL 54

Fault Message
- No Cam Sync Signal at PCM

Background
- The PCM uses information from both the camshaft position sensor and crankshaft position sensor to determine ignition timing.
- When the camshaft position sensor signal is lost, the PCM relies on the crankshaft position sensor signal to allow engine operation.
- This could result in fuel injection being 180° out of phase, would result in deterioration of engine performance and emissions.

Range of Check
- Ignition switch: ON
- Crankshaft position sensor signal (High or low) is input (Engine: Cranking).

Set Condition
- Camshaft position sensor signal (High or low) isn't input for 2 seconds.

Probable Cause
- Open Power supply circuit
- Open sensor ground
- Open or shorted signal circuit
- Damaged camshaft tangent magnet
- Sensor failed
- PCM failed