Description

(Foot) brake pedal permanently active

Effects on the driving operation

No retarder activation

Possible causes

The foot brake switch has never been inactive in the current operating cycle although it can be assumed that the vehicle was not permanently braked.

The following causes are possible:

*Defect at the brake switch that permanently causes a valid brake request.

* Defect in the vehicle cabling that permanently causes a valid brake request.

* Dataset error in the signal configuration to the effect that when the cabling is correct an active brake switch signal will always be generated.

Place of action

No description available.

Instruction

Check plug connections, cabling and brake switch.

Setting conditions of the event

No description available.

Test conditions of the event

No description available.

Final function check

If the defective component cannot be clearly identified, you should try to reproduce the fault:

• Reinstall the component in the vehicle.
• Test the function.

After the fault has been eliminated, the following steps have to be carried out:

• Conduct a test drive with function check.
• Read out the fault memory.
• Check the transmission for leaks.
• Perform a final visual inspection.

These steps are necessary to ensure the entire vehicle functions.

See also:

		Aftersales service index