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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.
  1. CHECK BUZZER (SEAT BELT, KEY REMINDER, TAILLIGHT REMINDER) 
    1. Check that the seat belt, key reminder and taillight reminder warning buzzers sound.

      Result 

      RESULT CHART

      Result Proceed to
      Seat belt warning buzzer does not sound A
      Key reminder warning buzzer does not sound B
      Taillight reminder warning buzzer does not sound (Meter illuminations normal) C
      No warning buzzers sound D

      HINT:

      • Seat belt warning buzzer on: Ignition switch is ON, driver or front passenger seat belt is unfastened, and vehicle speed is 12.4 mph (20 km/h) or more.
      • Key reminder warning buzzer on: Ignition switch is OFF, key is in ignition key cylinder, and driver side door is open.
      • Taillight reminder warning buzzer on: Ignition switch is OFF, taillight relay switch is ON, and driver side door is open.

    B:  Go to step  5

    C:  Go to step  11

    D: REPLACE COMBINATION ASSEMBLY METER 

    A: Go to Next Step 

  2. CHECK SUPPLEMENTAL RESTRAINT SYSTEM 
    1. Connect the Techstream to the DLC3.
    2. Turn the ignition switch ON and turn the tester ON.
    3. Enter the following menus: Body Electrical / SRS Airbag / Trouble Codes.

      Result 

      RESULT CHART

      Result Proceed to
      No SRS DTCs are output A
      SRS DTCs are output B

    B:  GO TO SUPPLEMENTAL RESTRAINT SYSTEM

    A: Go to Next Step 

  3. CHECK OCCUPANT CLASSIFICATION SYSTEM 
    1. Connect the Techstream to the DLC3.
    2. Turn the ignition switch ON and turn the tester ON.
    3. Enter the following menus: Body Electrical / Occupant Detection / Trouble Codes.

      Result 

      RESULT CHART

      Result Proceed to
      No occupant classification system DTCs are output A
      Occupant classification system DTCs are output B

    B:  GO TO OCCUPANT CLASSIFICATION SYSTEM

    A: Go to Next Step 

  4. CHECK KEY REMINDER FUNCTION 
    1. Ignition switch is OFF.
    2. Key is in ignition key cylinder.
    3. Driver side door is open.

      OK: 

      Key reminder warning buzzer ON. 

    OK: REPLACE MAIN BODY ECU 

    NG: REPLACE COMBINATION METER ASSEMBLY 

  5. READ VALUE OF TECHSTREAM (FRONT DOOR COURTESY SWITCH (DRIVER SIDE)) 
    1. Connect the Techstream to the DLC3.
    2. Turn the ignition switch ON and turn the tester ON.
    3. Select the item below from the Data List, and read the value displayed on the Techstream.

      Body Electrical / Main Body / Data List: 

      BODY ELECTRICAL / MAIN BODY / DATA LIST

      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      D Door Courtesy SW Driver side door courtesy switch signal / ON or OFF ON: Driver door is open
      OFF: Driver door is closed      		 -

    NG:  Go to step  9

    OK: Go to Next Step 

  6. READ VALUE OF TECHSTREAM (UNLOCK WARNING SWITCH) 
    1. Connect the Techstream to the DLC3.
    2. Turn the ignition switch ON and turn the tester ON.
    3. Select the item below from the Data List, and read the value displayed on the Techstream.

      Body Electrical / Main Body / Data List: 

      BODY ELECTRICAL / MAIN BODY / DATA LIST

      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      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: REPLACE COMBINATION METER ASSEMBLY 

    NG: Go to Next Step 

  7. INSPECT UNLOCK WARNING SWITCH ASSEMBLY 
    1. Disconnect the D19 unlock warning switch assembly connector.
      2. Fig 1: Identifying Unlock Warning Switch Assembly Operation
      G04833358Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Remove the unlock warning switch assembly.
    3. 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
    4. Reconnect the unlock warning switch assembly.

    NG: REPLACE UNLOCK WARNING SWITCH ASSEMBLY 

    OK: Go to Next Step 

  8. CHECK HARNESS AND CONNECTOR (UNLOCK WARNING SWITCH ASSEMBLY - MAIN BODY ECU) 
    1. Disconnect the D19 unlock warning switch connector.
      2. Fig 2: Identifying Unlock Warning Switch Assembly And Main Body ECU Connector Terminals
      G04833359Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Disconnect the 4D main body ECU connector.
    3. Measure the resistance.

      Standard resistance 

      TESTER CONNECTION SPECIFIED CONDITION

      Tester Connection Specified Condition
      D19-1 - 4D-7 (KSW) Below 1 Ω
      D19-2 - Body ground Below 1 Ω
    4. Reconnect the unlock warning switch connector.
    5. Reconnect the main body ECU connector.

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: REPLACE MAIN BODY ECU 

  9. INSPECT FRONT DOOR COURTESY SWITCH (DRIVER SIDE) 
    1. Disconnect the J2 front door courtesy switch connector.
      2. Fig 3: Identifying Front Door Courtesy Switch Operation (Driver Side)
      G04833360Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance.

      Standard resistance 

      TESTER CONNECTION SPECIFIED CONDITION

      Tester Connection Condition Specified Condition
      J2-1 - Body ground Not pushed (ON) Below 1 Ω
      J2-1 - Body ground Pushed (OFF) 10 kΩ or higher
    3. Reconnect the front door courtesy switch connector.

    NG: REPLACE FRONT DOOR COURTESY SWITCH (DRIVER SIDE) 

    OK: Go to Next Step 

  10. CHECK HARNESS AND CONNECTOR (FRONT DOOR COURTESY SWITCH - MAIN BODY ECU) 
    1. Disconnect the J2 front door courtesy switch connector.
      2. Fig 4: Identifying Front Door Courtesy Switch And Main Body ECU Connector Terminals
      G04833410Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Disconnect the 4A main body ECU connector.
    3. Measure the resistance.

      Standard resistance 

      TESTER CONNECTION SPECIFIED CONDITION

      Tester Connection Specified Condition
      J2-1 - 4A-21 (DCTY) Below 1 Ω
    4. Reconnect the front door courtesy switch connector.
    5. Reconnect the main body ECU connector.

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: REPLACE MAIN BODY ECU 

  11. READ VALUE OF TECHSTREAM (FRONT DOOR COURTESY SWITCH) 
    1. Connect the Techstream to the DLC3.
    2. Turn the ignition switch ON and turn the tester ON.
    3. Select the item below from the Data List, and read the value displayed on the Techstream.

      Body Electrical / Main Body / Data List: 

      BODY ELECTRICAL / MAIN BODY / DATA LIST

      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      D Door Courtesy SW Driver door courtesy switch signal / ON or OFF ON: Driver door is open
      OFF: Driver door is closed      		 -

    NG: Go to step 12 

    OK: REPLACE COMBINATION METER ASSEMBLY 

  12. INSPECT FRONT DOOR COURTESY SWITCH (DRIVER SIDE) 
    1. Disconnect the J2 front door courtesy switch assembly connector.
      2. Fig 5: Checking Front Door Courtesy Switch Operation (Driver Side)
      G04833360Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance.

      Standard resistance 

      TESTER CONNECTION SPECIFIED CONDITION

      Tester Connection Condition Specified Condition
      J2-1 - Body ground Not pushed (ON) Below 1 Ω
      J2-1 -Body ground Pushed (OFF) 10 kΩ or higher
    3. Reconnect the front door courtesy switch connector.

    NG: REPLACE FRONT DOOR COURTESY SWITCH (DRIVER SIDE) 

    OK: Go to Next Step 

  13. CHECK HARNESS AND CONNECTOR (FRONT DOOR COURTESY SWITCH - MAIN BODY ECU) 
    1. Disconnect the J2 front door courtesy switch connector.
      2. Fig 6: Identifying Front Door Courtesy Switch And Main Body ECU Connector Terminals
      G04833363Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Disconnect the 4A main body ECU connector.
    3. Measure the resistance.

      Standard resistance 

      TESTER CONNECTION SPECIFIED CONDITION

      Tester Connection Specified Condition
      J2-1-4A-21 (DCTY) Below 1 Ω
    4. Reconnect the front door courtesy switch connector.
    5. Reconnect the main body ECU connector.

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: REPLACE MAIN BODY ECU 

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