Description

Line interruption in supply line or short circuit of supply line to ground

Effects on the driving operation

No retarder activation.

No brake pedal position available, thus possible consequences are:

* No ANS.

* No gear release (no drive mode).

Possible causes

The connection between control unit and brake switch is interrupted or there is a short-circuit to ground in the cabling.

Place of action

No description available.

Instruction

Check plug-in contacts, 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:

		Troubleshooting for cable break
		Troubleshooting a short-circuit to ground
		Aftersales service index