Toronto, Ontario – Toyota has announced a recall on some of its hybrid SUV models for a transistor that could fail in certain circumstances.
The recall affects approximately 1,505 Highlander Hybrids and 1,476 Lexus RX400h vehicles in Canada. No other Toyota or Lexus models are involved.
The intelligent power module (IPM) inside the hybrid system inverter contains a control board with transistors. Certain transistors on the board in some of the subject vehicles were inadequately soldered and could be damaged from heat caused by a large current flow during high-load driving.
If this occurs, various warning lamps will illuminate on the instrument panel. In most cases, the vehicle will enter a fail-safe driving mode, resulting in reduced power in which the vehicle can still be driven for short distances. In limited circumstances, the power supply circuit fuse could blow when the transistor is damaged. If the fuse blows, the hybrid system will stop and the vehicle will coast to a stop.
Dealers will inspect the IPM and, if necessary, replace it at no charge once sufficient replacement parts have been produced. Toyota will notify owners of the involved vehicles by mail in July 2011.