Test B: Incorrect Fuel Gauge Indication

PINPOINT TEST B: INCORRECT FUEL GAUGE INDICATION

B1:

B2-B4:

B4-B7:

B7-B9:

B9-B11:

B11-B12:

Normal Operation
The fuel level sensor receives a reference voltage signal from the instrument cluster through circuit 29 (YE/WH), and returns the fuel level signal to the instrument cluster through circuit 1843 (BK/OG). The fuel level is determined using a variable resistance fuel sender unit, with an approximate resistance range between 15 ohms ± 2 ohms at empty (E) and 160 ohms ± 4 ohms at full (F). The instrument cluster interprets the voltage change as the resistance changes in the fuel sensor 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 29 (YE/WH).

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 29 (YE/WH).

Possible Causes
- Circuit 29 (YE/WH) open, short to ground or voltage
- Circuit 29 (YE/WH) short to circuit 1843 (BK/OG)
- Circuit 1843 (BK/OG) open or short to voltage
- Fuel pump module
- Fuel level sensor
- Fuel tank
- Instrument cluster