Section 282 (Power Door Lock Control System - Diagnosis): Pre-Check

WARNING: This page is about a different car, the 2004 Lexus SC 430. However, it is still accessible from the selected car via links, so may be relevant.

INSPECT ECU DATA MONITOR WITH HAND-HELD TESTER
1. The ECU data monitor will indicate if the part is normal or malfunctioning.
  Standard:
  
  Transponder key ECU (switch condition)
  
  Fig 1: ECU Data Monitor With Hand-Held Tester - Transponder Key ECU Switch Condition Table
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Standard:
  
  Door ECU (for driver's seat and passenger's seat)
  
  Fig 2: ECU Data Monitor With Hand-Held Tester - Door ECU (For Driver's Seat & Passenger's Seat) Condition Table
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
INSPECT ACTIVE TEST WITH HAND-HELD TESTER
1. The active test will indicate if the part is normal or malfunctioning.
  Standard:
  
  Door ECU (for driver's seat and passenger's seat)
  
  Fig 3: Active Test With Hand-Held Tester - Door ECU (For Driver's Seat & Passenger's Seat) Condition Table
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
INSPECT CUSTOMIZING FUNCTION WITH HAND-HELD TESTER (REFERENCE)
1. Makes it possible to select the following controls on door lock switch.
  Standard:
  
  Theft warning ECU
  
  Fig 4: Inspect Customizing Function With Hand-Held Tester - Door Lock Switch
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002