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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Catalytic Converter Over Temperature Alarm

The Catalytic Converter Alarm Module receives the output signal of the Catalytic Converter Over Temperature Sensor. When the module detects that the catalytic converter temperature has reached 810° C (1490° F) it sounds an alarm by sending a signal to the IPC, which requests a chime from the radio via Class 2 serial data.