Description

The TIM responds with a "Negative Acknowledge" (NACK).

Effects on the driving operation

No communication with the TIM possible. Unable to read the transmission-specific data. The vehicle might drive with the wrong transmission configuration.

Possible causes

The software version of the transmission control unit does not match the software version of the TIM.

Internal fault in the transmission control unit.

Internal fault in the TIM.

Place of action

ECU software, TIM.

Instruction

Reload software in the transmission control unit.

Clear the fault memory .

If the fault reoccurs, contact the Voith customer service.

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