Test A: Incorrect Fuel Gauge Indication

PINPOINT TEST A: INCORRECT FUEL GAUGE INDICATION

A1-A4:

A4-A6:

A7-A9:

A10-A11:

A12-A14:

Normal Operation
The fuel pump module assembly 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.

DTC B1202 - is a continuous and on-demand DTC that sets in the instrument cluster if the instrument cluster detects that the fuel sender is out of range on input circuit VMC11 (YE/VT) with an open or short to voltage. The instrument cluster defaults the fuel gauge to empty (E), once the instrument cluster detects a fault and sets DTC B1202.

DTC B1204 - is a continuous and on-demand DTC that sets in the instrument cluster if the instrument cluster detects that the fuel sender is out of range on input circuit VMC11 (YE/VT) with short to ground. The instrument cluster defaults the fuel gauge to empty (E), once the instrument cluster detects a fault and sets DTC B1204.

Possible Causes
- Circuit RMC32 (GN/BU) open or short to voltage
- Circuit RMC32 (GN/BU) short to circuit VMC11 (YE/VT)
- Circuit VMC11 (YE/VT) open, short to ground or voltage
- Fuel pump module assembly
- Fuel level sensor
- Fuel tank
- Instrument cluster