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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 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 

  2. 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 

  3. READ VALUE OF TECHSTREAM (P BUCKLE SW) 
    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 / Data List.

      Airbag ECU 

      AIRBAG ECU DATA LIST

      Item Measurement item / Display (Range) Normal Condition Diagnostic Note
      P-BELT BUCKL SW Front passenger seat belt buckle switch /
      UNSET: Front passenger seat belt is not fastened
      SET: Front passenger seat belt is fastened
      NG: Data is not determined      		 UNSET/SET -

      OK: 

      Front passenger seat belt warning light operates normally. 

    OK:  Go to step  7

    NG: Go to Next Step 

  4. CHECK FRONT SEAT INNER BELT ASSEMBLY RH (PASSENGER SIDE) 
    1. Disconnect the J11 front seat inner belt assembly RH (passenger side) connector.
      2. Fig 1: Identifying RH Front Seat Inner Belt Assembly Connector Terminals (Passenger Side)
      G04833415Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance.

      Standard resistance 

      TESTER CONNECTION SPECIFIED CONDITION

      Tester Connection Condition Specified Condition
      J11-1 (RBE-) - J11-2 (RBE+) Tongue plate fastened 10 kΩ or higher
      J11-1 (RBE-) - J11-2 (RBE+) Tongue plate released Below 1 Ω
    3. Reconnect the front seat belt inner assembly RH (passenger side) connector.

    NG: REPLACE FRONT SEAT INNER BELT ASSEMBLY RH (PASSENGER SIDE) 

    OK: Go to Next Step 

  5. CHECK HARNESS AND CONNECTOR (ECU - FRONT SEAT INNER BELT ASSEMBLY RH (PASSENGER SIDE)) 
    1. Disconnect the J24 occupant classification ECU connector.
      2. Fig 2: Identifying RH Front Seat Inner Belt Assembly (Passenger Side) And ECU Connector Terminals
      G04833416Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Disconnect the J11 front seat inner belt connector (passenger side).
    3. Measure the resistance.

      Standard resistance 

      TESTER CONNECTION SPECIFIED CONDITION

      Tester Connection Specified Condition
      J24-9 (BSW) - J11-2 (RBE+) Below 1 Ω
      J24-10 (BGND) - J11-1 (RBE-) Below 1 Ω
    4. Reconnect the occupant classification ECU connector.
    5. Reconnect the front seat inner belt connector (passenger side).

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to Next Step 

  6. CHECK HARNESS AND CONNECTOR (CENTER AIRBAG SENSOR ASSEMBLY - OCCUPANT CLASSIFICATION ECU) 
    1. Disconnect the J9 center airbag sensor assembly connector.
      2. Fig 3: Identifying Center Airbag Sensor Assembly And Occupant Classification ECU Connector Terminals
      G05591995Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Disconnect the J24 occupant classification ECU connector.
    3. Measure the resistance.

      Standard resistance 

      TESTER CONNECTION SPECIFIED CONDITION

      Tester Connection Specified Condition
      J9-13 (FSP-) - J24-4 (FSR-) Below 1 Ω
      J9-12 (FSP+) - J24-8 (FSR+) Below 1 Ω
    4. Reconnect the center airbag sensor assembly connector.
    5. Reconnect the occupant classification ECU connector.

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: REPLACE OCCUPANT CLASSIFICATION ECU 

  7. PERFORM ACTIVE TEST BY TECHSTREAM (P-BELT REMIND) 
    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 / Combination Meter / Active Test.

      METER 

      METER ACTIVE TEST CHART

      Item Test Details Diagnostic Note
      P-BELT REMIND Front passenger seat belt warning light / OFF or ON Ensure that vehicle is stopped and engine is idling

    OK: REPLACE COMBINATION METER ASSEMBLY 

    NG: Go to Next Step 

  8. INSPECT FUSE 
    1. Remove the GAUGE fuse from the main body ECU.
    2. Measure the resistance.

      Standard resistance: 

      Below 1 Ω 

    3. Reinstall the GAUGE fuse.

    NG: REPLACE FUSE 

    OK: Go to Next Step 

  9. INSPECT SEAT BELT WARNING LIGHT (PASSENGER SIDE) 
    1. Remove the front passenger seat belt warning light.
      2. Fig 4: Identifying Seat Belt Warning Light Connector Terminals (Passenger Side)
      G04833418Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Disconnect the D27 front passenger seat belt warning light connector.
    3. Measure the resistance.

      Standard resistance 

      TESTER CONNECTION SPECIFIED CONDITION

      Tester Connection Specified Condition
      D27-3 (PBEW) - D27-6 (IG+) Below 1 Ω
    4. Reconnect the front passenger seat belt warning light connector.
    5. Reinstall the front passenger seat belt warning light.

    NG: REPLACE SEAT BELT WARNING LIGHT (PASSENGER SIDE) 

    OK: Go to Next Step 

  10. CHECK HARNESS AND CONNECTOR (FUSE - SEAT BELT WARNING LIGHT) 
    1. Disconnect the D27 front passenger seat belt warning light connector.
      2. Fig 5: Identifying Front Passenger Seat Belt Warning Light And Main Body ECU (Front Side) Connector Terminals
      G05591997Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Disconnect the 4S main body ECU front side connector.
    3. Measure the resistance.

      Standard resistance 

      TESTER CONNECTION SPECIFIED CONDITION

      Tester Connection Specified Condition
      4S-15 - D27-6 (IG+) Below 1 Ω
    4. Reconnect the front passenger seat belt warning light connector.
    5. Reconnect the main body ECU front side connector.

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to Next Step 

  11. CHECK HARNESS AND CONNECTOR (SEAT BELT WARNING LIGHT - COMBINATION METER ASSEMBLY) 
    1. Disconnect the D2 combination meter assembly connector.
      2. Fig 6: Identifying Seat Belt Warning Light And Combination Meter Assembly Connector Terminals
      G05591998Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Disconnect the D27 front passenger seat belt warning light connector.
    3. Measure the resistance.

      Standard resistance 

      TESTER CONNECTION SPECIFIED CONDITION

      Tester Connection Specified Condition
      D2-9 (PBLT) - D27-3 (PBEW) Below 1 Ω
    4. Reconnect the combination meter assembly connector.
    5. Reconnect the front passenger seat belt warning light connector.

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: REPLACE MAIN BODY ECU 

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