Warm MGU
Investigate why MGU is warm.
What you'll see
Linear reduction of propulsion torque from MGS starts at 70degC and ends at 90degC
System reaction
Max allowed AC current is reduced linearly. Yellow OBD
Diagnostic depth
Evaluation Condition When sensor is connected and not short circuit Set Condition Set if internal Power Stage temperature is above predefined level. Limits: Event is set at HeatSinkHighWarningLevel deg celcius where reduction of output current starts. At HeatSinkReductionEndHighLevel °C output current is reduced to 0. If HeatSinkReductionEndHighLevel is 0 reduction is in-active. Clear Condition Cleared if internal Power Stage temperature is below HeatSinkHighWarningLevel - 1 °C.
Too low coolant flow (externally or internally caused) Too high coolant temperature Current rating exceeded Heated by surrounding Internal sensor failure