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: Description and Operation
The
fuel level sensor is attached to the modular fuel sender assembly. The resistance of the fuel sensor changes with fuel level by means of a rheostat. Its range is from 90 ohms with a full tank to 0 ohms with an empty tank. This resistance value is sent to the Instrument Panel Cluster
(IPC) and displayed on the fuel gauge. It is also sent to the PCM over UART serial data, and used for evaporative emissions system diagnosis.