Description

The transmission control unit does not receive any information from the CAN-pushbutton on the selected gear.

At least one of the CAN signals ´Requested Gear´ or ´Requested Range´ is not available.

Effects on the driving operation

Driving is not possible.

The transmission shifts to neutral.

The optional limp-home switch allows continuing the drive.

Possible causes

CAN communication disturbed.

Defect of the Voith CAN-pushbutton or defect of the MAN-FFR (vehicle control computer) for systems without Voith CAN-pushbutton.

Message TC1 is affected.

Place of action

No description available.

Instruction

Check cabling.

Check control units.

Setting conditions of the event

No description available.

Testing 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 function.

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

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

These steps are necessary to ensure the entire vehicle functions correctly.