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 Transistor Test:




Power Transistor Test Results Table:




1. Disconnect camshaft position sensor & power transistor harness connector and ignition coil harness connector.
2. Check power transistor continuity between terminals with a digital tester as shown in the figure.
^ The digital tester must have a diode check position and be able to measure up to 20M Ohms to perform this inspection.
3. If NG, replace distributor assembly.