Section 227 (Key Reminder Warning System - Diagnosis): Inspection

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

INSPECT UNLOCK WARNING SWITCH ASSY
1. Remove the unlock warning switch.
2. Measure the resistance of the switch.
  Standard:
  
  Fig 1: Unlock Warning Switch Assy - Specified Condition
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  If the result is not as specified, replace the switch assy.
  
  Fig 2: Identifying Terminals Of Unlock Warning Switch Assy
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
INSPECT FRONT DOOR COURTESY LAMP SWITCH (DRIVER SIDE)
1. Remove the courtesy lamp switch.
2. Measure the resistance of the switch.
  
  Fig 3: Front Door Courtesy Lamp Switch - Specified Condition
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Fig 4: Identifying Terminals Of Front Door Courtesy Lamp Switch (Driver Side)
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Standard:
  
  If the result is not as specified, replace the switch assy.