How To Proceed With Troubleshooting
WARNING: This page is about a different car, the 2005 Lexus LX 470. However, it is still accessible from the selected car via links, so may be relevant.
HINT:
The ECU of this system is connected to the multiplex communication system. Therefore, before starting troubleshooting, be sure to check that there is no trouble in the multiplex communication system.
Troubleshooting of the theft deterrent system is based on the premise that the door lock control system is operating normally. Accordingly, before troubleshooting the theft deterrent system, first make certain that the door lock control system is operating normally.
For troubleshooting, use a volt/ohm meter.
Be sure to use troubleshooting procedure appropriate for the diagnostic tool being used.
Perform troubleshooting in accordance with the procedure on the following page.