Toyota Highlander Hybrid 2012 - Hybrid System Overheating? changed Hybrid control ECU- no changes

Question

This happened on the highway run approx 40 min at full speed
Toyota recommended replacement of ECU / change completed- no results/ same defect

Answer 1

Hybrid overheating

Any coolant leak check for? The is a Exhaust Gas Control Actuator , that are being inspected for leakage which has been causing overheating situation. This is something that was produced under a Recall from Toyota.