Inspection Procedure

WARNING: This page is about a different car, the 2003 Lexus ES 300 and 2002 Lexus ES 300. However, it is still accessible from the selected car via links, so may be relevant.

For inspection procedure, see Fig 1 and Fig 2 . If inspection results in replacement of the body ECU, see MULTIPLEX COMMUNICATION SYSTEM article under COMMUNICATION DEVICES in ACCESSORIES & EQUIPMENT.

Fig 1: Inspecting Door Courtesy Switch Circuit (Front Door - Key Unlock Warning System - 1 Of 2)

Fig 2: Inspecting Door Courtesy Switch Circuit (Front Door - Key Unlock Warning System - 2 Of 2)