Lanos S Sedan L4-1.6L DOHC D-TEC MFI (2001)
Camshaft Position Sensor: Description and Operation
The Camshaft Position (CMP) sensor sends a CMP sensor signal to the powertrain control module (PCM)/engine control module (ECM). The
PCM/ECM uses this signal as a "sync pulse" to trigger the injectors in the proper sequence. The PCM/ECM uses the CMP sensor signal to indicate the
position of the #1 piston during its power stroke. This allows the PCM/ECM to calculate true sequential fuel injection mode of operation. If the
PCM/ECM detects an incorrect CMP sensor signal while the engine is running, DTC P0341 will set. If the CMP sensor signal is lost while the engine is
running, the fuel injection system will shift to a calculated sequential fuel injection mode based on the last fuel injection pulse, and the engine will
continue to run. As long as the fault is present, the engine can be restarted. It will run in the calculated sequential mode with a 1-in-6 chance of the
injector sequence being correct.
