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 226 (ANTI-LOCK BRAKE SYSTEM)SYSTEM TESTSTEST B: ABS WARNING LIGHT CIRCUITDIAGNOSTIC PROCEDURE
2004 Toyota Matrix XR, FWD, Standard
Diagnostic Procedure
2004 Toyota Matrix XR, FWD, StandardSECTION Diagnostic Procedure
WARNING: This page is about a different car, the 2003 Toyota Tundra, 2002 Toyota Tundra, and 2001 Toyota Tundra. However, it is still accessible from the selected car via links, so may be relevant.
- If ABS warning light does not light up, check and replace ABS ECU. See ABS ECU/ACTUATOR under REMOVAL & INSTALLATION. If ABS warning light remains ON, check warning light and combination meter/ABS warning light. If either are found to be faulty, replace bulb and/or combination meter. If both are in working order, check for open wiring harness/connector between GAUGE fuse and ABS ECU.
- Check for DTCs. See RETRIEVING DIAGNOSTIC TROUBLE CODES under SELF-DIAGNOSTIC SYSTEM. If DTC is output, repair indicated circuit. If no DTC is output, check for short circuit in wiring harness/connector between GAUGE fuse and ABS ECU. IF short is found, repair and/or replace wiring harness or connector. If wiring harness proves to be OK, replace ABS ECU. See ABS ECU/ACTUATOR under REMOVAL & INSTALLATION.
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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.