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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Fuel Level Sensor



Fuel Level Sensor
There are two parts to the Fuel Level Sender Monitor. The output of the Fuel Level Sender is monitored to detect if its output does not change as fuel is used. It is also monitored when the vehicle is stationary and fuel movement is expected to be at a minimum to check for a noisy signal.