Circuit Description

Camshaft position signal is produced by Camshaft Position (CMP). CMP sensor pulses when engine is running and Crankshaft Position (CKP) sync pulses are being received. PCM uses CMP signal pulses to initiate sequential fuel injection. PCM constantly monitors number of pulses on CMP signal circuit and compares number of CMP pulses to Crankshaft Position (CKP) sensor 58X reference pulses received. If PCM receives an incorrect number of pulses on CMP reference circuit, DTC P0341 is set. PCM will initiate injector sequence without CMP signal with a one in six chance that injector sequence is correct. Engine will continue to start and run normally, although misfire diagnostic will be affected if a misfiring condition occurs.

When DTC sets, PCM illuminates MIL on second trip after fault was detected. PCM will initiate injector sequence without CMP signal with a one in six chance that injector sequence is correct. PCM will store conditions present when DTC was set as freeze frame data in the FAILURE RECORDS data.

PCM will turn MIL off on third consecutive trip cycle during which diagnostic runs and fault is no longer recognized. A history DTC P0341 will clear after 40 consecutive trip cycles during which diagnostic runs and fault is no longer recognized. DTC can be cleared with scan tool, or by disconnecting battery voltage feed to PCM.