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
If it fails: lemon-manuals.org.ua

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Fuel Level Sensing

The BCM calculates the fuel level then sends a serial data message to the instrument cluster and the Powertrain Control Module (PCM). The BCM sends the fuel level information to the instrument cluster each time there is a change of at least 0.5 liters (0.13 gallons). The BCM sends the fuel level information to the PCM each time a change of 1.0 liter (0.26 gallons).