B1720

Read the instructions below then start the fault diagnostic procedure.

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

B1720

Fault symptoms

The fuel gauge shows empty.

Fuel level indicator lamp is on.

Some of the trip computer's functions are affected.

Conditions

Open circuit/Short circuit Ground/Shorting to B+ on one of the pins connected to the tank sensor.

Diagnostic help

A readout of current tank information can be obtained using the diagnostic tool.

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

The value is not sent to the bus when activated.

Check wiring harness.

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