Operation CHARM: Car repair manuals for everyone.
Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

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Ignition Control Module: Testing and Inspection

IGNITION CONTROL MODULE (IGNITER) INSPECTION
1. Check for poor connection of the ignition coil, high-tension leads and the PCM.
2. Check the ignition coil and the high-tension leads.
3. Measure the voltage at the following PCM terminals.
- 4N ignition control module (No.1, 4)
- 4R ignition control module (No.2, 3)
- 4F, 4G camshaft position sensor (SGT, SGC signals)
- 3B mass air flow sensor

4. If all are normal, but misfire still occurs, replace the ignition coil.