LEMON Manuals: Even more car manuals for everyone
Home >> GMC >> 2003 >> Safari Van Cargo, AWD >> Repair and Diagnosis >> Electrical >> Gauges >> Instrument Panel, Gages, And Console >> Diagnostic Information and Procedures >> DTC P0463: Fuel Level Signal High >> Circuit Description

Circuit Description

The fuel level sender changes resistance in response to fuel level. The PCM monitors the signal circuit of the fuel level sender in order to determine the fuel level. When the fuel tank is full, the sender resistance is high and the PCM senses a high signal voltage. When the fuel tank is empty, the sender resistance is low and the PCM senses a low signal voltage. The PCM uses the signal circuit of the fuel level sender in order to calculate the percentage of fuel remaining in the tank. The PCM sends the fuel level percent via the class 2 serial data circuit to the instrument cluster in order to control the fuel gage. The fuel level information is also used for misfire and EVAP diagnostics.

scientia non olet · About LEMON Manuals