B1720

Read the instructions below then start the fault diagnostic procedure.

Symptom: The fuel gauge shows empty. Fuel level indicator is on. Some of the trip computer's functions are affected.

B1720

Fault symptoms

The fuel gauge shows empty.

Fuel level indicator is on.

Some of the trip computer's functions are affected.

Fault criteria

The circuit resistance is > 460 ohm or < 15 ohm.

Diagnostic help

The current tank information can be read with the diagnostic tool.

The fuel gauge can also be activated with the diagnostic tool.

The value is not sent to the bus when activated.

Checking the wiring harness

Jiggle the wiring harness at several points and in different directions to detect intermittent breaks and short-circuits in the leads. Observe the multimeter, test lamp or diagnostic tool during the test.