TCO, tachograph – Incorrect or unreliable data
â–¶ How to fix
Check for fault codes in the TCO control unit. If fault code 65415 is also present, then check fault codes in the AWD control unit.
What you'll see
No driver-visible symptom recorded.
System reaction
This rotational speed is compared with the rotational speed from the gearbox control unit and BMS. If these rotational speed signals are correct, the system is not affected.
Diagnostic depth
Detection
The fault code is generated if the sensor value deviates too much from the rotational speed signals from the engine, main shaft, layshaft and ABS.
Possible cause
The control unit obtains no speed signals or incorrect speed signals from TCO. If fault code 65415 is also present the fault is probably in the AWD control unit.