Test B: Incorrect Fuel Gauge Indication - Dual Fuel Tanks

PINPOINT TEST B: INCORRECT FUEL GAUGE INDICATION - DUAL FUEL TANKS

B1-B4:

B4-B6:

B6-B8:

B8-B12:

B12-B14:

B14-B16:

Normal Operation
The primary fuel level sender is hardwired to the instrument cluster through the signal circuit 29 (YE/WH) and the return circuit 396 (BK/OG). The secondary fuel level sender is hardwired to the instrument cluster through the signal circuit 675 (YE/LB) and the return circuit 396 (BK/OG). The instrument cluster monitors the resistance readings sent to the instrument cluster from the fuel senders and commands the fuel gauge with a corresponding movement of the pointer.

DTC B1201 - is a continuous and on-demand DTC that sets if the instrument cluster detects an out of range input caused by an open or short to voltage on circuit 29 (YE/WH) or circuit 675 (YE/LB).

DTC B1204 - is a continuous and on-demand DTC that sets if the instrument cluster detects an out of range input caused by a short to ground on circuit 29 (YE/WH).

Possible Causes
- Circuit 29 (YE/WH) open, short to ground or voltage
- Circuit 396 (BK/OG) open or short to voltage
- Circuit 675 (YE/LB) open, short to ground or voltage
- Circuit 789 (BN/WH) open
- Fuel tank
- Fuel level sender
- Instrument cluster