The 2.5L ignition system uses three sensors that provide information to the Powertrain Control Module (PCM). These sensors are as follows: 

l Cylinder Identification (CID) sensor. The CID sensor is mounted in the distributor and sends a CID (G) signal to the PCM. This signal is used for detection of the No.1 cylinder TDC position. 

l Crankshaft Position (CKP1) sensor 1. The CKP1 sensor is mounted in the distributor and sends a CKP1 (NE1) signal to the PCM. The CKP1 sensor creates six evenly spaced signals for each distributor revolution. These signals are used during starting, in a backup condition if the CKP2 sensor fails or when the STI (TEN) terminal of the Data Link Connector (DLC) is grounded.