Coolant heater contactor supply short circuit to 24V
â–¶ How to fix
• Measure on the component between H32-A1 and U30. If there is contact, change the heater H32. • Measure on the cable between E81-C10 and U30. If there is contact, change the cable. • Change BMU(E81)
What you'll see
No driver-visible symptom recorded.
System reaction
Forced hybrid battery cooling bypass, battery temperature rising, Risk for battery and heater over temperature
Diagnostic depth
Detection
Electrical diagnosis in the BMU
Possible cause
Component or cable harness damage