Signal From Fuel Gauge Sender -G, Testing

Signal From Fuel Gauge Sender -G, Testing

If the fuel gauge in the instrument cluster is not working properly, check whether the signal generated by the fuel level sender is being received by the instrument cluster.

- Connect VAG 1551 scan tool. Connecting VAG 1551/VAS 5051
- Select "Read Measuring Value Block" function 08. Reading
- Select display group 002.

If the fuel level is displayed on scan tool VAG 1551, this means that the instrument cluster is malfunctioning and must be replaced.

- Removing instrument cluster.

If the fuel level is not displayed on scan tool VAG 1551, test the signal at the multi-pin connector on the instrument cluster.

- Connect test box VAG 1598 to the blue 32-pin connector using adapter VAG 1598/25.
- Use multimeter VAG 1526 to measure the resistance between contacts 5 and 7 (sensor Ground).

Specifications:

Fuel tank empty: approx. 54 ohms (front-wheel drive)
approx. 59 ohms (all-wheel drive)

Fuel tank full: approx. 290 ohms (front-wheel drive)
approx. 282 ohms (all-wheel drive)

- If the values do not match the specifications, test wiring between instrument cluster and fuel gauge sender -G (front-wheel drive / all-wheel drive) or -G169- (all-wheel drive) using wiring diagram.
- If there are no open circuits or short circuits, check fuel gauge sender -G (front-wheel drive / all-wheel drive) or -G169- (all-wheel drive).
- Check sender for fuel gauge.
- If the value obtained matches the specification, the malfunction is in the instrument cluster; replace the instrument cluster.