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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Key-On/Engine Off

Fig. 29 Self-test code output format. Key-ON, Engine-OFF:





At this time, a test of the EEC-IV system is conducted with the power applied and engine OFF. For self-test to detect errors in this test, the fault must be present at the time of testing, Fig. 29. For intermittent errors, refer to Continuous Test.