Composite error for TCU software (internal)
â–¶ How to fix
Check software status; Check TCU; Check EEPROM parameters for plausibility, EEPROM can contain incorrect or implausible values;
What you'll see
No driver-visible symptom recorded.
System reaction
Activate "Central Solenoid Disconnection Unit";
Diagnostic depth
Detection
TCU / Software; Normal mode
Possible cause
Transmission shifts to neutral (gear loss); Retarder is no longer available;;