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 MANUALSTOYOTA2004SIENNA XLE LIMITED, AWDREPAIR AND DIAGNOSISELECTRICALCOMPONENT LOCATIONSELECTRICAL COMPONENT LOCATORCONTROL UNITS
2004 Toyota Sienna XLE Limited, AWD
Control Units
2004 Toyota Sienna XLE Limited, AWDSECTION Control Units
CONTROL UNITS LOCATION
| Component | Location |
|---|---|
| Airbag Sensor Assembly | Below center of dash. See Figure. |
| Blower Motor Controller (Rear) | Behind right rear quarterpanel. See Figure. |
| Body ECU | Behind left side of dash. See Figure. |
| Clearance Sonar ECU | Behind center of dash. See Figure. |
| Cooling Fan ECU | At center front of engine compartment. See Figure. |
| Distance Control ECU | Behind right side of dash. See Figure. |
| Door Lock Control Receiver | Behind upper center of dash. See Figure. |
| Engine Control Module | Behind right side of dash. See Figure. |
| Headlight Control ECU LH | Behind left headlight. See Figure. |
| Headlight Control ECU RH | Behind right headlight. See Figure. |
| Moon Roof Control ECU | At center front of roof. See Figure. |
| Navigation ECU | Under right front seat. See Figure. |
| Power Back Door ECU | Behind left rear quarterpanel. See Figure. |
| Power Slide Door ECU LH | In left siding door. See Figure. |
| Power Slide Door ECU RH | In right sliding door. See Figure. |
| Rear Seat Entertainment ECU | Behind right rear quarterpanel. See Figure. |
| Seat Heater ECU LH | Under left front seat. See Figure. |
| Seat Heater ECU RH | Under right front seat. See Figure. |
| Shift Lock Control ECU | At base of shifter assembly. See Figure. |
| Skid Control ECU With Actuator | At left rear of engine compartment. See Figure. |
| Slide Door Attachment Control LH | At center of left sliding door. See Figure. |
| Slide Door Attachment Control RH | At center of right sliding door. See Figure. |
| Transponder Key Amplifier | Behind left side of dash. See Figure. |
| Transponder Key Computer | Behind upper center of dash. See Figure. |
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.