Inspection Procedure

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.

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 performed, it means that the wireless instruction from the transmitter is properly input to the theft warning ECU.
1. NG: GO TO FLOW CHART OR PROBLEM SYMPTOMS TABLE (See ONLY WIRELESS CONTROL FUNCTION IS INOPERATIVE )
2. OK: GO TO NEXT STEP.
CHECK OUTPUTS OF HAZARD WARNING LIGHTS
1. Check that the turn signal lights are blinking when the hazard warning signal switch is pressed.
1. NG: GO TO LIGHTING SYSTEM (See PROBLEM SYMPTOMS TABLE )
2. OK: GO TO NEXT STEP.
USE HAND-HELD TESTER
1. NO: Go to step 5 (NOT USING TESTER)
2. YES: GO TO NEXT STEP.
PERFORM ACTIVE TEST BY HAND-HELD TESTER
1. Connect the hand-held tester to the DLC3.
2. Enter into the active test using the hand-held tester.
1. Check that the wireless buzzer sounds by the active test.
  Standard:
  
  Fig 1: Wireless Buzzer Active Test Table
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. OK: REPLACE THEFT WARNING ECU ASSY
2. NG: Go to step 6
INSPECT WIRELESS DOOR LOCK BUZZER
1. Check the continuity between each terminal of the buzzer.
  
  Fig 2: Checking Continuity Between Wireless Door Lock Buzzer
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Standard:
  
  Fig 3: Wireless Door Lock Buzzer Reference Table
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
NOTE: Since the circuit to sound the buzzer is built in the theft warning computer, applying battery voltage directly to the buzzer does not sound the buzzer.
1. NG: REPLACE WIRELESS DOOR LOCK BUZZER
2. OK: GO TO NEXT STEP.
CHECK WIRE HARNESS (THEFT WARNING ECU <=> WIRELESS DOOR LOCK BUZZER)
1. Disconnect the connectors of the wire harness door lock buzzer and the theft warning ECU.
  
  Fig 4: Disconnecting Door Lock Buzzer & theft Warning ECU
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Check the continuity between the wireless door lock buzzer connector (W3) and the theft warning connector (T7).
  Standard:
  
  Fig 5: Checking Continuity Between Door Lock Buzzer & Theft Warning Connector Reference Table
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. NG: REPAIR OR REPLACE WIRE HARNESS
2. OK: CHECK AND REPLACE THEFT WARNING ECU ASSY