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Home >> Lexus >> 2006 >> LS 430 >> Repair and Diagnosis >> Body & Frame >> Door Locks >> Wireless Door Lock Control System - Diagnostics >> Wireless Door Lock Control System (W/Smart Key System) >> Wireless Buzzer Volume And On/Off Switch Circuit >> Inspect Procedure
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Inspect Procedure

  1. CHECK WIRE HARNESS (WIRELESS DOOR LOCK BUZZER CONTROLLER THEFT WARNING ECU ASSY) 
    1. Disconnect the K4 controller connector.
    2. Disconnect the T5 ECU connector.
    3. Measure the resistance of the wire harness side connectors.

    Standard: 

    TESTER CONNECTION SPECIFIED CONDITION

    Tester Connection Specified Condition
    K4-1 - T5-11 (BZR3) Below 1 Ω
    K4-2 - T5-23 (BZRG) Below 1 Ω

    NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 

    Fig 1: Identifying K4 Controller Connector Terminals
    G03001368Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK: GO TO NEXT STEP 

  2. CHECK WIRELESS DOOR LOCK BUZZER CONTROLLER 
    1. Reconnect the K4 controller connector.
    2. Measure the resistance of the controller.

    Standard: 

    TESTER CONNECTION SPECIFIED CONDITION

    Tester Connection Switch Condition Specified Condition
    1 - 2 OFF (knob turned fully counterclockwise) 10 kΩ or higher
    1 - 2 OFF --> ON (knob turned clockwise) 10 kΩ or higher --> Below 1 Ω

    NG: REPLACE WIRELESS DOOR LOCK BUZZER CONTROLLER 

    Fig 2: Identifying K4 Controller Connector Terminals
    G03001369Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN ON  PROBLEM SYMPTOMS TABLE