Inspect Procedure

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.

CHECK WIRE HARNESS (WIRELESS DOOR LOCK BUZZER CONTROLLER - THEFT WARNING ECU ASSY)
1. Disconnect the K4 buzzer controller connector.
2. Disconnect the T5 ECU connector.
3. Measure the resistance of the wire harness side connectors.
  Standard:
  
  Fig 1: Checking Wire Harness (Wireless Door Lock Buzzer Controller - Theft Warning ECU Assy)
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  NG: REPAIR OR REPLACE HARNESS AND CONNECTOR
  
  OK: Go to next step
  
  Fig 2: Identifying Terminals Resistance Specification Table
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
CHECK WIRELESS DOOR LOCK BUZZER CONTROLLER
1. Reconnect the K4 buzzer controller connector.
2. Measure the resistance between terminals 1 and 2 of the buzzer controller.
  Standard:
  
  Fig 3: Checking Wireless Door Lock Buzzer Controller
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Fig 4: Identifying Terminals Resistance Specification Table
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  NG: REPLACE WIRELESS DOOR LOCK BUZZER CONTROLLER
  
  OK: Go to next step
  
  PROCEED TO NEXT CIRCUIT INSPECTION SHOWN ON PROBLEM SYMPTOMS TABLE (See PROBLEM SYMPTOMS TABLE )