Test B: Incorrect Fuel Gauge Indication - Without Flex-Fuel

PINPOINT TEST B: INCORRECT FUEL GAUGE INDICATION - WITHOUT FLEX-FUEL

B1:

B2-B5:

B5-B6:

Normal Operation
The fuel level is determined using a variable resistance fuel level sending unit, with an approximate resistance range between 15 ohms at empty (E) and 160 ohms at full (F). 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 and B1204 if the fuel pump circuits are open or shorted to ground.

Possible Causes
- circuit 29 (YE/WH) open or short to ground
- circuit 398 (BK/YE) open
- fuel level sensor
- fuel tank
- instrument cluster