Test B: Incorrect Fuel Gauge Indication

PINPOINT TEST B: INCORRECT FUEL GAUGE INDICATION

Normal Operation
The fuel level sensor card receives a reference voltage signal from the instrument cluster (IC) through circuit 29 (YE/WH), and returns the fuel level signal to the instrument cluster (IC) 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 (IC) interprets the voltage change as the resistance changes in the fuel sensor card and commands the fuel gauge to sweep to the correct level.

Instrument Cluster (IC) DTCs
- DTC B1202 (Fuel Sender Circuit Open) - is a continuous and on-demand DTC that sets if the instrument cluster (IC) detects an open or short to voltage on the fuel level signal circuit 29 (YE/WH).
- DTC B1204 (Fuel Sender Circuit Short to Ground) - is a continuous and on-demand DTC that sets if the instrument cluster (IC) detects a short to ground on the fuel level signal circuit 29 (YE/WH).

PCM DTCs
- DTC P0460 (Fuel Level Sensor A Circuit) - sets when the PCM determines the value of the fuel level input signal is stuck, that the fuel level input signal does not change or does not correspond with the calculated fuel usage.
- DTC P0461 (Fuel Level Sensor A Circuit Range/Performance) - sets when the PCM determines the fuel level input signal repeatedly moves in and out of range, exceeding the minimum or maximum allowable calibrated parameters for a specified fuel fill percentage in the fuel tank.
- DTC P0462 (Fuel Level Sensor A Circuit Low) - sets in the PCM when the PCM detects a short to ground on the fuel pump module signal circuit based on the messaged input received from the instrument cluster (IC).
- DTC P0463 (Fuel Level Sensor A Circuit High) - sets in the PCM when the PCM detects an open or a short to voltage on the fuel pump module signal circuit based on the messaged input received from the instrument cluster (IC).

This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- Fuel pump module
- Fuel level sensor card
- Fuel tank
- Instrument cluster (IC)

B1-B3:

B3-B6:

B6-B8:

B9-B10:

B11-B14: