Description

Implausible brake source signal

Effects on the driving operation

No retarder activation

Possible causes

Implausible signal to the respective brake pedal stage. The signal is constituted by the 3 brake switch input signals.

Place of action

No description available.

Instruction

Set brake switch to valid position and check the faulty signal including the 3 inputs.

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