Inspection Procedure

WARNING: This page is about a different car, the 2004 Lexus ES 330. However, it is still accessible from the selected car via links, so may be relevant.

CHECK WIRELESS DOOR LOCK FUNCTIONS
1. Check that the wireless door lock functions by the operation of the transmitter switch.
  HINT: If the wireless door LOCK/UNLOCK operation can be done, it means that the wireless instruction from the transmitter is properly input to the theft warning ECU.
  
  NG: FLOW CHART (See ONLY WIRELESS CONTROL FUNCTION IS INOPERATIVE (PREPARE NEW OR NORMAL TRANSMITTER OF THE SAME TYPE VEHICLE) )
  
  OK: Go to next step.
CHECK HAZARD WARNING LIGHTS
1. Check that the turn signal light is blinking when the hazard warning signal switch is pressed.
  NG: Go to LIGHTING SYSTEM (See LIGHTING SYSTEM - DIAGNOSIS )
  
  OK: Go to next step.
PERFORM ACTIVE TEST BY HAND-HELD TESTER
1. Active test
  1. Check that the wireless buzzer sounds by the active test.
    Standard:
    
    Fig 1: Active Test Item Chart
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    
    OK: Go to step 6
    
    NG: Go to next step.
INSPECT WIRELESS DOOR LOCK BUZZER
1. Check the continuity.
  NOTE:
  - The buzzer circuit is built in the body ECU but not in the buzzer itself.
  - If applying the battery voltage directly to the buzzer, the buzzer does not sound.
  Fig 2: Identifying Wireless Door Lock Buzzer Terminals
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  1. Check the resistance between terminals 1 and 2 of the buzzer.
    Standard: Approximately 1 kΩ
    
    NG: REPLACE WIRELESS DOOR LOCK BUZZER
    
    OK: Go to next step.
CHECK WIRE HARNESS
1. Disconnect the K4 wireless door lock buzzer controller connector and K1 wireless door lock buzzer connector, and check the continuity between the disconnected connectors.
  
  Fig 3: Identifying K4 And K1 Wireless Door Lock Buzzer Controller Connectors
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Standard:
  
  Fig 4: Wireless Door Lock Buzzer Controller Continuity Chart
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  NG: REPAIR OR REPLACE HARNESS AND CONNECTOR
  
  OK: Go to next step.
INSPECT WIRELESS DOOR LOCK BUZZER CONTROLLER (See INSPECTION )
NG: REPLACE WIRELESS DOOR LOCK BUZZER CONTROLLER

OK: Go to next step.
CHECK WIRE HARNESS
1. Disconnect the B5 body ECU connector and K4 wireless door lock buzzer controller connector, and check the continuity between the disconnected connectors.
  
  Fig 5: Identifying B5 Body ECU Connector And K4 Wireless Door Lock Buzzer Controller Connectors
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Standard:
  
  Fig 6: K4 Wireless Door Lock Buzzer Controller Connector Specification Chart
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  NG: REPAIR OR REPLACE HARNESS AND CONNECTOR
  
  OK: REPLACE DRIVER SIDE JUNCTION BLOCK ASSY