Ignition Control Module: Testing and Inspection

NOTE:
- See Fuel and Emissions when the malfunction indicator lamp (MIL) blinks.
- Perform an input test on the ignition control module (ICM) after finishing the fundamental tests for the ignition system and fuel emission system.

Disconnect the 4P connector from the ICM. Make the following input tests at the connector terminals. If all tests prove OK, yet the system still fails to work, replace the ICM.




1. Check for continuity between the No. 4 terminal and body ground.
- If there is continuity, go to step 2.
- If there is no continuity, check for:
- An open in the BLK wire.
- Disconnected terminals.
- Poor ground (G101).

2. With the ignition switch ON (11), there should be battery voltage between the No. 3 (+) and No. 4 (-) terminals.
- If there is battery voltage, go to step 3.
- If there is no voltage, check for:
- An open in the BLK/YEL wire. Disconnected terminals.
- Faulty ignition coil.

3. With the ignition switch ON (11), there should be battery voltage between the No. 2 (+) and No. 4 (-) terminals.
- If there is no voltage, check for:
- An open in the GRN wire between the ignition coil and ICM.
- Faulty ignition coil.