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)

Or, hide this message: temporarily or permanently

With NGS

Engine Condition:
IGN-ON O2S1 Below 1.0 Volts
IGN-ON O2S2 Below 1.0 Volts

Deceleration O2S1 0-0.5 Volts
Deceleration O2S2 0-1.0 Volts

Acceleration O2S1 0.5-1.0 Volts
Acceleration O2S2 0-1.0 Volts