2003 Toyota Matrix Base, FWD, AutomaticFACTORY OEM SERVICE PROCEDURE

Seat Belt: Inspection

  1. INSPECT FRONT SEAT INNER BELT ASSY LH 
    1. Inspect the buckle switch.
      1. Fasten the seat belt (buckle switch ON).
        2. Fig 1: Identifying Buckle Switch Terminals (Buckle Switch ON)
        G02866677Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      2. Inspect the continuity and resistance between the terminals, as shown in the illustration and table.

        Standard: 

        3. Fig 2: Buckle Switch Terminals Continuity Chart (Buckle Switch ON)
        G02866676Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      3. Release the seat belt (buckle switch OFF).
        4. Fig 3: Identifying Buckle Switch Terminals (Buckle Switch OFF)
        G02866679Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      4. Inspect the continuity and resistance between the terminals, as shown in the illustration and table.

      Standard: 

      Fig 4: Buckle Switch Terminals Continuity Chart (Buckle Switch OFF)
      G02866678Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      If the result is not as specified, replace the inner belt.

    2. Inspect the circuit for the airbag seat position sensor.
      1. Inspect the continuity between the B7 connector and connector for the airbag seat position sensor, as shown in the illustration and table.
        2. Fig 5: Inspecting Continuity Between B7 Connector & Connector For Airbag Seat Position Sensor
        G02866681Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard: 

      Fig 6: Airbag Seat Position Sensor Terminals Continuity Chart
      G02866680Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    If the result is not as specified, replace the inner belt.

  2. INSPECT FRONT SEAT INNER BELT ASSY RH 
    1. Inspect the buckle switch.
      1. Fasten the seat belt (buckle switch ON).
      2. Inspect the continuity between terminals B8-1 and B8-2, as shown in the illustration.

        Standard: No continuity 

        3. Fig 7: Inspecting Continuity Between Buckle Switch Terminals B8-1 & B8-2 (Buckle Switch ON)
        G02866682Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      3. Release the seat belt (buckle switch OFF).
      4. Inspect the continuity between terminals B8-1 and B8-2, as shown in the illustration.

        Standard: Continuity 

        5. Fig 8: Inspecting Continuity Between Buckle Switch Terminals B8-1 & B8-2 (Buckle Switch OFF)
        G02866683Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      If the result is not as specified, replace the inner belt.

    2. Inspect the circuit for the occupant detection sensor.
      1. Connect the connector terminals 1 and 2 for the occupant detection sensor.
      2. Inspect the continuity between terminals B8-3 and B8-4, as shown in the illustration.

        Standard: Continuity 

        3. Fig 9: Inspecting Continuity Between Occupant Detection Sensor Terminals B8-3 & B8-4
        G02866684Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    If the result is not as specified, replace the inner belt.

Factory Service Tools

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.

Shop Manual-Ready ToolsCompare Repair QuoteQuote Shield Pro

When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.

Rather have a pro handle this?

A certified mobile mechanic comes to your home or office. They bring the tools, you stay comfortable. No tow truck, no waiting room, no surprises.

Comes to youSame-day available12-month warranty
Get a Free Quote

No obligation. See pricing before you book.