Description

Vehicle speed over CAN faulty.

Effects on the driving operation

Hard shifts

Possible causes

An incorrect value for the vehicle speed was received on the CAN bus.

Place of action

No description available.

Instruction

Check cables and plug connections

check external control unit

Using the SAE-J1939-CAN protocol:

Check CAN-message 'Cruise Control/Vehicle Speed (CCVS)'

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.