Fuel Level Sensor (G), Checking

Fuel Level Sensor (G), Checking

Special tools, testers and auxiliary items required

• Multimeter (V.A.G 1526E)

• Connector Test Set (V.A.G 1594C)

Procedure






- Move the right front seat all the way forward.

- Remove the rear bench seat.

- Fold the insulation mat near the locking flange cover to the side.

- Remove the bolts - arrows - and the locking flange cover.

- Disconnect the connector - 2 - on the locking flange.






• Ignore - 1 -.

Fuel level sensor installed:






- Connect the multimeter to measure the resistance between contacts - 2 and 4 -.

• Empty tank: 254 to 276 ohms.

• Full tank: 53 to 71 ohms.

- Connect the multimeter to measure the resistance between contacts - 2 and 6 -.

• Empty tank: 86 to 64 ohms.

• Full tank: 287 to 269 ohms.

- Connect the multimeter to measure the resistance between contacts - 4 and 6 -.

• Any sensor position: Approximately 340 ohms.

• If measured value is 0 ohms there is a short circuit. If measured value is there and open circuit is in the wiring.

• To check resistance values "tank full" or "tank empty", the fuel level sensor must be removed and the floater on the sensor must be placed in upper or lower end position.

• With fuel level sensor removed, the following values are obtained because of the greater deflection of the floater arm:

Fuel level sensor removed:






- Connect the multimeter to measure the resistance between contacts - 1 - and - 3 -.

• Sensor at lower stop: Highest 53.4 ohms.

• Sensor at upper stop: Lowest 272.7 ohms.

- Connect the multimeter to measure the resistance between contacts - 2 and 3 -.

• Sensor at lower stop: Lowest 272.7 ohms.

• Sensor at upper stop: Highest 53.4 ohms.

- Connect the multimeter to measure the resistance between contacts - 1 - and - 2 -.

• Any sensor position: approximately 340 ohms.

- Replace the fuel level sensor if there is a large deviation in the measured value from 0 ohms (short circuit) or measured value infinity ohms (open circuit) and if no faults are found in the electric wire.

- Install the fuel level sensor. Refer to => [ Fuel Level Sensor (G) ] Fuel Level Sensor (G).