CAM Signal (CKT 630)

The PCM uses this signal to determine the position of the #1 piston during the piston's power stroke. This allows the PCM to calculate true Sequential Multiport Fuel Injection (SFI). A loss of this signal sets a DTC P0341. If the CAM signal is lost while the engine is running, the fuel injection system shifts to a calculated sequential fuel injection based on the last fuel injection pulse and the engine continues to run. The engine can be restarted and run in the calculated sequential mode as long as the fault is present with a 1 in 6 chance of being correct.