United States 92V135000
Toyota Motor Corporation
The problem
THE ELECTRONIC CONTROL UNIT (ECU) FOR THE POWER DOOR LOCK SYSTEM CAN FAIL, CAUSING THE CONTACTS TO "WELD", AND RESULTING IN DOOR LOCK SOLENOID DAMAGE, WITH FAILURE OF THE DOOR TO LOCK OR UNLOCK, EVEN UNDER MANUAL OPERATION.
Risk
IF THE DOOR FAILS TO OPEN AFTER ECU FAILURE, VEHICLEOCCUPANTS WOULD HAVE INCREASED DIFFICULTY EXITING THE VEHICLE IN AN EMERGENCY.
What owners should do
INSTALL AN ADDITIONAL SUBCIRCUIT RELAY CONTROL TO PREVENT MALFUNCTION OF ORIGINAL RELAYS IN THE ECU.
Units 554910