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 635 (CAN COMMUNICATION SYSTEM - DIAGNOSTICS)HOW TO PROCEED WITH TROUBLESHOOTING
2004 Toyota Matrix XR, FWD, Standard
How To Proceed With Troubleshooting
2004 Toyota Matrix XR, FWD, StandardSECTION How To Proceed With Troubleshooting
WARNING: This page is about a different car, the 2004 Toyota Camry. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
When DTCs other than U0121/94, U0123/62, U0124/95, U0126/63 are output, inspect and repair the trouble areas indicated by the DTCs.
- CHECK CAN BUS LINE (SEE CHECK CAN BUS LINE )
- CHECK AND CLEAR DTCs
HINT:
When checking the DTCs for the skid control ECU, PROCEED TO PAGE PRE-CHECK .
- CHECK DTC COMBINATION (SEE DIAGNOSTIC TROUBLE CODE CHART )
- CIRCUIT INSPECTION
- IDENTIFICATION OF PROBLEM
- REPAIR OR REPLACE
- CONFIRMATION TEST
- END
RENDER: 1.0x
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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.