Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSTOYOTA2004MATRIX XR, FWD, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 98 (MULTIPLEX CONTROL SYSTEMS)COMPONENT LOCATIONS
2004 Toyota Matrix XR, FWD, Standard
Component Locations
2004 Toyota Matrix XR, FWD, StandardSECTION Component Locations
WARNING: This page is about a different car, the 2002 Toyota Avalon. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
For additional multiplex control system locations, see illustration. See Fig 1.
COMPONENT LOCATIONS
| Component | Location |
|---|---|
| Body Control Electronic Control Unit | Attached To Driver Side Junction Block |
| Center Airbag Sensor Assembly | Under Center Of Instrument Panel, On Floorpan Tunnel |
| Data Link Connector No. 1 (DLC1) | Right Rear Corner Of Engine Compartment, On Idle Air Control Valve Bracket |
| Data Link Connector No. 3 (DLC3) | Under Left Side Of Instrument Panel, To Right Of Driver Side Junction Block |
| Driver Door ECU | In Driver Door Armrest |
| Driver Side Junction Block | Left Side Of Instrument Panel, Behind Access Panel To Left Of Steering Column |
| Front Passenger Door ECU | In Passenger Door Armrest |
| Multi-Display Information Center | Center Of Instrument Panel, Just Above Air Vent Assembly |
| OPEN DOOR Indicator Light | On Service Reminder Indicators & Warning Buzzer Display Center |
| Service Reminder Indicators & Warning Buzzer Display Center | Part Of Multi-Display Information Center |
| Power Seat ECU (With Driving Position Memory) | Under Driver Seat |
| Theft Deterrent ECU | Behind Passenger Kick Panel |
| Wireless Door Lock Control Receiver | In Right "C" Pillar |
RENDER: 1.0x
NO RELATED
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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.