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 Testing

Fuel Injector Diagnosis:

For fuel injector diagnosis, refer to the Fuel Injector Diagnosis chart.

NOTE: For poor fuel economy diagnosis or engine miss, also consider Transmission Control System problems.

Helpful Information
- Circuit A142 splices to supply voltage to the fuel injectors, ignition coil, ASD relay, and the generator. The PCM controls the ground circuit for each of the components powered by circuit A142.