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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ECM Control Relay Monitor - P1606

ECM control relay monitor - P1606
After the vehicle ignition has been turned off, the ECM can maintain its own power source by holding on the ECM relay. The ECM turns itself off by releasing this relay. If it has done this but is still operating then there is a fault with the ECM control relay circuit and this is logged.