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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Component Tests and General Diagnostics





NOTE: The sequence of this diagnosis MUST be followed.

WORK SEQUENCE
- Switch ignition OFF to erase input signals from memory.

NOTE: If fuel pump relay or another component fails to operate during diagnosis, entire output diagnosis must be repeated after necessary repairs are made. Do NOT crank or start the engine during the output diagnosis. This would automatically switch the system to the INPUT tests when the diagnosis procedure is activated.