General Information

The Electronic Ignition (EI) system consists of the following components and wiring circuits:
^ The Ignition Control (IC) module
^ The ignition coils
^ The Powertrain Control (PCM) Module
^ The 24X Crankshaft Position (CKP) Sensor
^ The 7X CKP sensor
^ The Camshaft Position (CMP) Sensor

The EI wiring circuits listed here use service common names, they are as follows: Between the IC module and the PCM:
^ Low resolution engine speed signal
^ IC timing control
^ IC timing signal
^ Low reference

Between the 7X CKP sensor and the IC module:
^ CKP sensor (1) signal
^ Low reference

Between the 24X CKP sensor and the PCM:
^ Medium resolution engine speed signal
^ 12-volt reference
^ Low reference

Between the CMP and the PCM:
^ CMP sensor signal
^ Low reference
^ 12 volt reference

The IC module also receives power and chassis ground through the following circuits:
^ Ignition (1) voltage
^ Ground