Internal control unit temperature too high
â–¶ How to fix
Check that the control unit is clean so that no dirt or rubbish prevents heat from escaping from the cooling element. Contact an Allison dealer.
What you'll see
No driver-visible symptom recorded.
System reaction
No system-reaction text recorded.
Diagnostic depth
Detection
Control unit has too high internal temperature.
Possible cause
This abnormal temperature increase can be due to a hardware fault in the control unit.