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

Power Unit:





- Remove power unit from ignition coil bracket.
- Connect 2 new 1.5V in series (total voltage must be 3 VDC).

Checking Power Unit:





- Connect positive lead of analog ohmmeter to "G" terminal of power unit.
- Connect negative lead of analog ohmmeter to "OC" terminal of power unit.
- Connect positive side side of battery source to "IB" terminal of power unit.
- Confirm that continuity exists between "G" and "OC" terminals when the negative circuit is supplied to "G" terminal of power unit.
- Coinfirm that continuity does not exist when power is removed.
- Replace power unit if it fails test.