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

Input Devices




1. Engine control module (ECM)
(With built-in barometric pressure sensor)
2. Central processing unit
3. Volume air flow sensor
4. Engine coolant temperature sensor
5. Intake air temperature sensor
6. Throttle position sensor
7. Heated oxygen sensor
8. Main relay
9. Transmission range switch
10. Power steering pressure switch