Ignition System: Testing and Inspection

ELECTRONIC IGNITION (EI) SYSTEM DIAGNOSIS

CIRCUIT DESCRIPTION
The ignition control module (ICM) has independent power and ground circuits. The circuits between the ICM and the powertrain control module (PCM) consist of the following circuits:
- The ignition control (IC) timing signal
- The IC timing control
- The low-resolution engine speed signal
- A low reference

For a complete system description, refer to Electronic Ignition (EI) System Description.

TEST

Steps 1 - 12:

Steps 13 - 24:

Step 24: