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 131 (ENGINE CONTROL SYSTEM SELF DIAGNOSTICS)SELF-DIAGNOSTIC SYSTEMRETRIEVING DIAGNOSTIC TROUBLE CODESCHECK MODE DIAGNOSTIC TROUBLE CODE RETRIEVAL
2004 Toyota Matrix XR, FWD, Standard
CHECK Mode Diagnostic Trouble Code Retrieval
2004 Toyota Matrix XR, FWD, StandardSECTION CHECK Mode Diagnostic Trouble Code Retrieval
WARNING: This page is about a different car, the 2003 Toyota Prius. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
If using Toyota hand-held tester, if ignition switch is turned from ON to ACC or OFF position during CHECK mode, all DTCs and freeze frame data will be erased from ECM. DO NOT switch from CHECK mode to NORMAL mode until all DTCs and freeze frame data are recorded.
- Ensure vehicle battery is fully charged. Apply parking brake. Place transaxle in Park or Neutral. Ensure A/C and ignition are off. Check that throttle valve is fully closed. Connect hand-held tester to Data Link Connector (DLC3) at driver's side of instrument panel. See Figure. Turn ignition on and then turn hand-held tester on.
- Switch hand-held tester from NORMAL mode to CHECK mode. Ensure Malfunction Indicator Light (MIL) on instrument cluster flashes to indicate CHECK mode operation. Start engine. If no DTCs exist, MIL will turn off. Try to simulate conditions of driveability complaint described by customer.
- Record any DTCs and freeze frame data displayed for system diagnosis. If driveability problem exists and no DTCs are present, go to TROUBLESHOOTING - NO CODES article for diagnosis by symptom. If no DTCs are present and no driveability problem exists but MIL is illuminated, a problem may exist in the Hybrid Vehicle (HV) control system. Consult authorized dealer for diagnosis of HV control system.
- If any DTCs are present, perform appropriate DTC test listed under DIAGNOSTIC TESTS. For DTC description, see DIAGNOSTIC TROUBLE CODE DEFINITIONS under DIAGNOSTIC TROUBLE CODE DEFINITIONS. For information on freeze frame data, see FREEZE FRAME DATA . For information on two-trip detection logic codes, see TWO-TRIP DETECTION LOGIC .
- After repairs for DTC have been completed, DTC must be cleared from ECM. See CLEARING DIAGNOSTIC TROUBLE CODES . Road test vehicle to ensure all symptoms and/or complaints have been repaired.
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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.