Test A: Incorrect Fuel Gauge Indication

PINPOINT TEST A: INCORRECT FUEL GAUGE INDICATION

A1-A2:

A3-A4:

A5-A7:

A8-A11:

A11-A14:

A14-A15:

Normal Operation
The fuel level sending unit is hardwired to the instrument cluster between the signal circuit 398 (BK/YE) and the return circuit 29 (YE/WH). The instrument cluster monitors the resistance readings that are sent to the instrument cluster from the fuel pump module and commands the fuel gauge with a corresponding movement of the pointer. The instrument cluster sets DTCs B1202 or B1204 if the fuel pump circuits are open or shorted to ground.

Possible Causes
- Circuit 29 (YE/WH) open, short to ground or voltage
- Circuit 398 (BK/YE) open or short to voltage
- Fuel pump module jumper harness
- Fuel level sensor
- Fuel pump module
- Fuel tank
- Instrument cluster