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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Service Hints

I19 (A), I20 (B), I21 (C) INSTRUMENT ECU
(A)21-GROUND : Approx. 12 Volts with ignition SW ACC or ONposition
(B) 2-GROUND : Approx. 12 Volts with stop light SW at ON
(C) 1-GROUND : Always approx. 12 Volts
(C) 2-GROUND : Approx. 12 Volts with ignition SW at ON or STposition

S5 STOP LIGHT SW
2-1 : Closed with brake pedal depressed