FMI Volvo Truck Fault Codes DTC

Fmi 0

Conditions for registering a trouble code:

Signal level above 4.7 V.

Possible reason:

Faulty wear sensor.

Defective modulator.

Damaged wires or contacts.

Control unit response:

Disabled brake lining warning function.

Obvious external signs:

The yellow warning light is on.

Pictogram of a minor brake system malfunction.

Alert: EBS system fault indicator.

Relevant check:

Check for open or shorted wires and contacts between the modulator and the wear sensor.

Perform MID 136 SID 70/71/72/73/74/75 Sensor, pad wear, inspection.

In the worst case, replace the modulator.

 

Fmi 1

Conditions for registering a trouble code:

The signal level is below 0.48 V.

Possible reason:

Faulty wear sensor.

Defective modulator.

Damaged wires or contacts.

Control unit response:

Disabled brake lining warning function.

Obvious external signs:

The yellow warning light is on.

Pictogram of a minor brake system malfunction.

Alert: EBS system fault indicator.

Relevant check:

Check for open or shorted wires and contacts between the modulator and the wear sensor.

Perform MID 136 SID 70/71/72/73/74/75 Sensor, pad wear, inspection.

In the worst case, replace the modulator.

Fmi 3

Conditions for registering a trouble code:

Short circuit of the power circuit of the wear sensor to a circuit with a voltage above 6 V.

Possible reason:

Defective modulator.

Damaged wires or contacts (short circuit to a circuit with a higher voltage).

Control unit response:

Disabled brake lining warning function.

Obvious external signs:

The yellow warning light is on.

Pictogram of a minor brake system malfunction.

Alert: EBS system fault indicator.

Relevant check:

Check for a short between the modulator power supply circuit (CSG 2) and the wear sensor power supply circuit (LWS A / B 3, LWS A / B 5, LWS C / D 3, LWS C / D 5).

In the worst case, replace the modulator.

Fmi 10

Conditions for registering a trouble code:

Signals on the right and left side differ by more than 20%.

Possible reason:

The brake caliper is mechanically damaged / defective.

The wear on the brake pads is too great.

Control unit response:

EBS functionality downgraded.

Obvious external signs:

The yellow warning light is on.

Pictogram of a minor brake system malfunction.

Alert: EBS system fault indicator.

Relevant check:

Check brake caliper and brake pads.

Fmi 12

Conditions for registering a trouble code:

Short circuit of the power circuit of the wear sensor to a circuit with a voltage below 4.5 V.

Short to ground in the power circuit of the wear sensor.

Possible reason:

Defective modulator.

Damaged wires or contacts.

Control unit response:

Disabled brake lining warning function.

Obvious external signs:

The yellow warning light is on.

Pictogram of a minor brake system malfunction.

Alert: EBS system fault indicator.

Relevant check:

Check the wires and contacts between the modulator and the wear sensor.

Perform MID 136 SID 70/71/72/73/74/75 Sensor, pad wear, inspection.

In the worst case, replace the modulator.