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DTC › MGU2 MGU2 / 0400

Warm EM

â–¶ How to fix

Investigate why Electric machine is warm. Look for bad connections in the cables/connectors for the temperature sensor

What you'll see

Linear reduction of propulsion torque from MGS starts at 160degC and ends at 180degC

System reaction

Max allowed AC current is reduced linearly. Yellow OBD

Diagnostic depth

Detection

Evaluation Condition When sensor is connected and not short circuit. Set Condition Set if motor temperature is above predefined level. Limits: Event is set at MotorHighWarningLevel deg celcius where reduction of AC current starts. At MotorReductionEndHighLevel °C AC current is reduced to 0. If MotorReductionEndHighLevel is 0 reduction is in-active. Clear Condition Cleared if motor temperature is below MotorHighWarningLevel-1 °C.

Possible cause

Too low coolant flow (externally or internally caused) Too high coolant temperature Heated by surrounding Motor temperature sensor failure Internal hardware failure Wrong look-up table for sensor is used

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