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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Powertrain Control Module (PCM)

The PCM reads the fuel enable circuit to determine if the fuel injection should be allowed. If the fuel enable PWM signal is not present, the PCM does not allow fuel injection. If the correct PWM signal is present, the PCM allows fuel injection and normal engine operation.

The PCM has some diagnostic features associated with the PASS-Key II fuel input, including diagnostic trouble codes.