Cylinder Identification Sensor: Description and Operation

PURPOSE
The Cylinder Identification (CID) circuit output provides information to the Injector Driver Module (IDM) on the position of each cylinder's TDC position. so that current can be applied to the correct injector at the proper time.

OPERATION
The CID is one of two digital control signals used by the IDM. The CID is produced in the Powertrain Control Module (PCM) and sent to the IDM via the CID circuit. The CID provides synchronization information to the engine's first and fifth injector in the firing order. The IDM then uses this information to properly control injector operation.