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Home >> Toyota >> 2008 >> FJ Cruiser RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 186 (Door Lock) >> Key Reminder Warning System >> Key Reminder Buzzer does not Sound >> Inspection Procedure

Inspection Procedure

WARNING: This page is about a different car, the 2008 Toyota Yaris. However, it is still accessible from the selected car via links, so may be relevant.

HINT:

Since the key reminder warning system has functions that use CAN communication, firstly confirm that there is no malfunction in the communication system by inspecting the CAN communication functions in accordance with How to Proceed with Troubleshooting. Then, conduct the following troubleshooting procedure.

  1. READ VALUE USING TECHSTREAM 
    1. Connect the Techstream to the DLC3.
    2. Turn the ignition switch ON.
    3. Turn the tester on.
    4. Enter the following menus: Body electrical / Main Body / Data List
    5. According to the display on the tester, read the "Data List".

    Main Body: 

    DATA LIST CHART

    Item Measurement Item/Range Normal Condition
    Key Unlock Warning SW Unlock warning switch signal / ON or OFF ON: Key Is In Ignition key cylinder
    OFF: No key Is In Ignition key cylinder

    OK: The display is as specified in the normal condition column. 

    NG: Go to step  4

    OK: GO TO NEXT STEP 

  2. READ VALUE USING TECHSTREAM 
    1. Connect the Techstream to the DLC3.
    2. Turn the ignition switch ON.
    3. Turn the tester on.
    4. Enter the following menus: Body electrical / Main Body / Data List
    5. According to the display on the tester, read the "Data List".

    Main Body 

    DATA LIST CHART

    Item Measurement Item/Range Normal Condition
    D Door Courtesy SW Driver side door courtesy switch signal / ON or OFF ON: Driver side door Is open
    OFF: Driver side door Is closed

    OK: The display is as specified in the normal condition column. 

    NG: Go to step  6

    OK: GO TO NEXT STEP 

  3. CHECK COMBINATION METER ASSEMBLY (WARNING BUZZER) 
    1. Temporarily replace the combination meter assembly with a new or normally functioning one.
    2. Check the key reminder warning system function. (See OPERATION CHECK  )

      OK: The key reminder warning system functions properly. 

    NG: REPLACE MAIN BODY ECU 

    OK: END (COMBINATION METER ASSEMBLY IS FAULTY) 

  4. INSPECT UNLOCK WARNING SWITCH ASSEMBLY 
    1. Remove the unlock warning switch assembly.
    2. Measure the resistance.

      Standard resistance 

      TESTER CONNECTION SPECIFIED CONDITION

      Tester Connection Condition Specified Condition
      1-2 Not pushed 10 kΩ or higher
      1-2 Pushed Below 1 Ω
    3. Reinstall the unlock warning switch assembly.
      4. Fig 1: Inspecting Unlock Warning Switch Assembly
      G04833179Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPLACE UNLOCK WARNING SWITCH ASSEMBLY 

    OK: GO TO NEXT STEP 

  5. CHECK WIRE HARNESS AND CONNECTOR (UNLOCK WARNING SWITCH ASSEMBLY MAIN BODY ECU) 
    1. Disconnect the D19 unlock warning switch connector.
    2. Disconnect the 4D main body ECU connector.
    3. Measure the resistance between the wire harness side connectors.

      Standard resistance 

      TESTER CONNECTION SPECIFIED CONDITION

      Tester Connection Specified Condition
      D19-1 - 4D-7 (KSW) Below 1 Ω
      D19-1 or 4D-7 (KSW) - Body ground 10 kΩ 2 or higher
      D19-2 - Body ground Below 1 Ω
    4. Reconnect the unlock warning switch and the main body ECU connectors.
      5. Fig 2: Identifying D19 Unlock Warning Switch Connector And 4D Main Body ECU Connector
      G04833180Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: REPLACE MAIN BODY ECU 

  6. INSPECT FRONT DOOR COURTESY SWITCH (DRIVER SIDE) 
    1. Remove the front door courtesy switch (driver side).
    2. Measure the resistance of the switch.

      Standard resistance 

      TESTER CONNECTION SPECIFIED CONDITION

      Tester Connection Condition Specified Condition
      1 - Body ground Not pushed (ON) Below 1 Ω
      1 - Body ground Pushed (OFF) 10 kΩ or higher
    3. Reinstall the front door courtesy switch.
      4. Fig 3: Inspecting Front Door Courtesy Switch (Driver Side)
      G04833360Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPLACE FRONT DOOR COURTESY SWITCH (DRIVER SIDE) 

    OK: GO TO NEXT STEP 

  7. CHECK HARNESS AND CONNECTOR (FRONT DOOR COURTESY SWITCH - MAIN BODY ECU) 
    1. Disconnect the J2 front door courtesy switch connector.
    2. Disconnect the 4A main body ECU connector.
    3. Measure the resistance of the wire harness side connectors.

      Standard resistance 

      TESTER CONNECTION SPECIFIED CONDITION

      Tester Connection Specified Condition
      J2-1-4A-21(DCTY) Below 1 Ω
      J2-1 or 4A-21 (DCTY) - Body ground 10 kΩ or higher
    4. Reconnect the front door courtesy switch and main body ECU connectors.
      5. Fig 4: Identifying J2 Front Door Courtesy Switch Connector And 4A Main Body ECU Connector
      G04833361Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: REPLACE MAIN BODY ECU 

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