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

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

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Engine Control Module: Testing and Inspection

Test:






REMOVAL / INSPECTION / INSTALLATION
1. Remove the bolts and nuts. (Located under center of dashboard)
2. With a voltmeter, measure terminal voltages through the rear of the ECM connectors.

3. Install ECM in the reverse order of removal.