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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Feedback Control Module: Diagrams


Pin 2 Oxygen sensor signal (Green Wire)
Pin 4 Oxygen sensor (Screed Braid)
Pin 5 Ground (Brown Wire)
Pin 7 When grounded, fixes pulse ratio to 85% (Red/White Wire)
Pin 8 Voltage supply from fuel pump relay (Yellow/Red Wire)
Pin 11 When grounded, fixes pulse ratio to 92% min. (Red Wire)
Pin 12 When grounded, fixes pulse ratio to 60% (Yellow/Red Wire)
Pin 15 Ground signal to modulating valve (Violet Wire)
Pin 16 Ground (Black Wire)
Pin 17 Voltage supply from fuse 8 (Brown/White Wire)
Pin 26 Internal Shunt (Yellow)