Test B: Incorrect Fuel Gauge Indication

PINPOINT TEST B: INCORRECT FUEL GAUGE INDICATION

B1-B3:

B3-B6:

B6-B8:

Normal Operation
The fuel pump gauge sender receives a reference voltage signal from the instrument cluster through circuit VMC11 (YE/VT), and returns the fuel level signal to the instrument cluster through circuit RMC32 (GN/BU). As the fuel level changes, a float actuates a variable resistor that alters the fuel level signal voltage. The instrument cluster interprets this signal and commands the fuel gauge to sweep to the correct level.

Possible Causes
- circuit RMC32 (GN/BU) open
- circuit VMC11 (YE/VT) open, short to ground, or short to voltage
- fuel pump gauge sender
- fuel tank
- instrument cluster