FixVault
Home › Lexus › 2007 › RX 400h AWD › Repair and Diagnosis › External Pages › Different car › Section 175 (Door Lock) › Wireless Door Lock Control System › No Answer-Back › Inspection Procedure

Inspection Procedure

WARNING: This page is about a different car, the 2007 Toyota RAV4. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK WIRELESS DOOR LOCK CONTROL FUNCTION 
    1. Check the wireless door lock control functions by operating the transmitter switch.

      Result: 

      RESULT REFERENCE

      Result Proceed to
      Wireless door lock functions are normal but hazard warning lights answer-back does not occur A
      Wireless door lock functions are normal but wireless door lock buzzer answer-back does not occur B
      Doors cannot be locked and unlocked with transmitter C

    B: Go to step   4 

    C: Go to FLOWCHART 

    A: Go TO NEXT STEP. 

  2. PERFORM ACTIVE TEST BY INTELLIGENT TESTER (FLSH RELAY) 
    1. Select the ACTIVE TEST, use the intelligent tester to generate a control command, and then check that the hazard warning lights flash.

      Main body ECU: 

      MAIN BODY ECU ACTIVE TEST REFERENCE

      Item Test Details Diagnostic Note
      HAZARD Turns FLSH relay ON / OFF -

      OK: Hazard warning lights are turned ON / OFF. 

    OK: REPLACE INSTRUMENT PANEL JUNCTION BLOCK (MAIN BODY ECU) 

    NG: Go TO NEXT STEP. 

  3. CHECK HAZARD WARNING LIGHT 
    1. Check that the hazard warning lights flash continuously when the hazard warning signal switch is pressed.

      OK: Hazard warning lights flash continuously. 

    NG: Go to  LIGHTING SYSTEM 

    OK: REPLACE INSTRUMENT PANEL JUNCTION BLOCK (MAIN BODY ECU) 

  4. INSPECT WIRELESS DOOR LOCK BUZZER 
    1. Measure the resistance between terminals 1 and 2 of the buzzer.

      Standard resistance: Approximately 1 kΩ 

      Fig 1: Identifying Terminals 1 And 2 Of Buzzer
      G04491062Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      NOTE:
      • The buzzer circuit is built into the body ECU, not into the buzzer itself.
      • When battery voltage is directly applied to the buzzer, the buzzer does not sound.

    NG: REPLACE WIRELESS DOOR LOCK BUZZER 

    OK: Go TO NEXT STEP. 

  5. CHECK WIRE HARNESS (WIRELESS DOOR LOCK BUZZER - MAIN BODY ECU AND BODY GROUND) 
    1. Disconnect the A10 buzzer connector.
    2. Disconnect the E17 ECU connector.
    3. Measure the resistance of the wire harness side connectors.

      Standard resistance 

      RESISTANCE SPECIFIED CONDITIONS

      Tester Connection Specified Condition
      A10-1 - E17-2 (BZR) Below 1 Ω
      A10-2 - Body ground
      A10-1 or E17-2 (BZR) - Body ground 10 kΩ or higher
      Fig 2: Identifying A10 Buzzer And E17 ECU Connector Terminals
      G04491063Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 

    OK: REPLACE INSTRUMENT PANEL JUNCTION BLOCK (MAIN BODY ECU) 

About FixVault