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 110 (ENGINE CONTROLS - SELF-DIAGNOSTICS)SCAN TOOL PROBLEMSDLC NO. 3 INSPECTION
2004 Toyota Matrix XR, FWD, Standard
DLC No. 3 Inspection
2004 Toyota Matrix XR, FWD, StandardSECTION DLC No. 3 Inspection
WARNING: This page is about a different car, the 2003 Lexus LX 470. However, it is still accessible from the selected car via links, so may be relevant.
- If scan tool displays UNABLE TO CONNECT TO VEHICLE when scan tool is connected, try scan tool on another vehicle. If scan tool operates on another vehicle, go to next step. If scan tool does not operate on another vehicle, problem is probably with scan tool.
- Check DLC No. 3 for loose or damaged terminals. Ensure DLC No. 3 terminals are in correct position in connector. See ENGINE PERFORMANCE in SYSTEM WIRING DIAGRAMS article in ELECTRICAL. Repair as necessary. If connector and terminals are okay, go to next step.
- Check voltage and resistance between ground and specified terminal on DLC No. 3. See DLC NO. 3 VOLTAGE & RESISTANCE SPECIFICATIONS table. See Fig 1. If voltage and resistance readings are not as specified, check wiring circuit. See ENGINE PERFORMANCE in SYSTEM WIRING DIAGRAMS article in ELECTRICAL.
DLC NO. 3 VOLTAGE & RESISTANCE SPECIFICATIONS
| Terminal No. (Application) | Specification | ||
|---|---|---|---|
| 4 (Chassis Ground) | One Ohm Or Less | ||
| 5 (Signal) | One Ohm Or Less | ||
| 7 (BUS+ Line) | (1) | ||
| 16 (Battery Voltage) | 9-14 Volts | ||
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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.