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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Shock Sensor Diagnostics

If Shock Sensor Diagnostics is enabled (cycle #6 in the list above), MALL subsystem type 4 will activate the HORN output for a period of 25ms upon detection of an inactive to active transition on the TAMPER input. MALL subsystem type 4 will activate the HORN output for a period of 100ms upon detection of an inactive to active transition on the TAMPER input. The technician will be able to test the Tamper input anywhere on the vehicle while in this cycle.