Test B: Incorrect Fuel Gauge Indication

PINPOINT TEST B: INCORRECT FUEL GAUGE INDICATION

B1-B3:

B3-B6:

B6-B9:

B9-B11:

Normal Operation
The instrument cluster provides a reference voltage to the fuel pump module through circuit 8-GA7 (WH/RD), and a return signal through circuit 9-GA7 (BN/RD). 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 if the instrument cluster detects an open or a short to voltage on the fuel level signal circuit 8-GA7 (WH/RD).

DTC B1204 - is a continuous and on demand DTC that sets if the instrument cluster detects a short to ground on the fuel level signal circuit 8-GA7 (WH/RD).

Possible Causes
- Circuit 8-GA7 (WH/RD) open, short to ground or voltage
- Circuit 8-GA7 (WH/RD) short to circuit 9-GA7 (BN/RD)
- Circuit 9-GA7 (BN/RD) open or short to voltage
- Fuel tank
- Fuel pump module
- Instrument cluster.