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 MANUALSTOYOTA20054RUNNER LIMITED, 4.0 U, 4WDREPAIR AND DIAGNOSISACCESSORIES & EQUIPMENTCOMMUNICATION DEVICESCAN COMMUNICATION SYSTEM - DIAGNOSTICS
2005 Toyota 4Runner Limited, 4.0 U, 4WD
Can Communication System - Diagnostics
2005 Toyota 4Runner Limited, 4.0 U, 4WDSECTION Can Communication System - Diagnostics
- Precaution
- Location
- System Diagram
- System Description
- How To Proceed With Troubleshooting
- Customer Problem Analysis Check
- Problem Symptoms Table
- Terminals Of Ecu
- Diagnosis System
- Fail-Safe Chart
- Diagnostic Trouble Code Chart
- Check Can Bus Line
- Skid Control Ecu Communication Stop Mode
- Check Can Main Bus Line For Disconnection
- Check Can Bus Lines For Short Circuit
- Check Can Bus Line For Short To +B
- Check Can Bus Line For Short To GND
- Check For An Open In One Side Of Can Sub Bus Line
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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.