The ACC control unit stores this fault if it receives a message via the CAN bus that the transmitting control unit has marked as ”defective”.
Example: The engine control unit detects that the calculated torque is incorrect due to a system error. It still sends the message, but marks it as defective.
The defective message mean that the ACC control unit switches of and interrupts accelerating.
The stored fault shows that there is no fault in the ACC control unit!
Troubleshooting must be continued at the control unit for which the fault is stored.
The following control units can be affected: