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.
SYS.OK|MANUAL.DBβ LIVE
HOMESERVICE MANUALSTOYOTA2004MATRIX XR, FWD, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 127 (ENGINE CONTROL SYSTEM SELF DIAGNOSTICS - 4-CYLINDER)SCAN TOOL PROBLEMSDATA LINK CONNECTOR NO. 3 INSPECTION
2004 Toyota Matrix XR, FWD, Standard
Data Link Connector No. 3 Inspection
2004 Toyota Matrix XR, FWD, StandardSECTION Data Link Connector No. 3 Inspection
WARNING: This page is about a different car, the 2003 Toyota Camry Solara. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
The vehicle's ECM uses ISO 9141-2 for communication. The terminal arrangement of the DLC3 complies with SAE J1962 and matches the ISO 9141-2 format.
- 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 DLC3 for loose or damaged terminals. See Fig 1. Ensure DLC3 terminals are in correct position in connector. Repair as necessary. If connector and terminals are okay, go to next step.
- Check voltage and resistance between ground and specified terminal on DLC3. See IDENTIFYING DLC3 VOLTAGE & RESISTANCEΒ table. If voltage and resistance readings are not as specified, check wiring circuit. See appropriate WIRING DIAGRAM under ENGINE PERFORMANCE in SYSTEM WIRING DIAGRAMS article.
IDENTIFYING DLC3 VOLTAGE & RESISTANCE
| Terminal No. (Circuit) | Specification | Condition |
|---|---|---|
| 4 (Chassis Ground) - Body Ground | Less Than 1 Ξ© | Always |
| 5 (Signal Ground) - Body Ground | Less Than 1 Ξ© | Always |
| 7 (BUS Communication) | Pulse Generation | During Transmission |
| 16 (Battery Voltage) - Body Ground | 9-14 V | Always |
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- β’ You smell fuel, burning insulation, or see smoke.
- β’ Brakes feel soft, pull hard to one side, or make grinding noises.
- β’ The engine overheats, stalls repeatedly, or misfires under load.
- β’ You are missing required tools, torque specs, or safe lifting equipment.
- β’ You are not confident in the next step or safety outcome.