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 184 (ENGINE IMMOBILIZER SYSTEMS)SELF-DIAGNOSTIC SYSTEMCLEARING DIAGNOSTIC TROUBLE CODES
2004 Toyota Matrix XR, FWD, Standard
Clearing Diagnostic Trouble Codes
2004 Toyota Matrix XR, FWD, StandardSECTION Clearing Diagnostic Trouble Codes
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:
If using Toyota hand-held tester, DTCs may be cleared from ECM by switching from CHECK mode to NORMAL mode, or from NORMAL mode to CHECK mode, or if ignition switch is turned from ON to ACC or OFF position during CHECK mode.
- After repairs for Diagnostic Trouble Codes (DTC) have been completed, DTCs should be cleared from Engine Control Module (ECM) memory. Using scan tool or Toyota hand-held tester, follow the manufacturer's instructions and clear DTCs from ECM.
- DTCs may also be cleared by removing EFI No. 1 fuse (15-amp). EFI No. 1 fuse is located in engine compartment junction block at left side of engine compartment, in front of shock tower. DTCs may also be cleared by disconnecting negative battery cable. However, other various memory functions such as the clock, radio, etc. may be cleared and must be reset.
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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.