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.
1995 Toyota Avalon XLSFACTORY OEM SERVICE PROCEDURE
DLC-3 Inspection
- If scan tester displays UNABLE TO CONNECT TO VEHICLE when scan tester is connected, try scan tester on another vehicle. If scan tester operates on another vehicle, proceed to next step. If scan tester does not operate on another vehicle, problem is probably with scan tester.
- Note location of DLC-3 and its terminals. See Figure and Fig 1 . Ensure voltage and resistance are correct at specified terminals when checking between terminal on DLC-3 and body ground. See DLC-3 VOLTAGE & RESISTANCE SPECIFICATIONS table. If voltage and resistance are not as specified, check wiring circuit. See WIRING DIAGRAMS article.
NOTE:
Terminal No. 2 on DLC-3 provides pulse generation during information transmission from Engine Control Module (ECM).
DLC-3 VOLTAGE & RESISTANCE SPECIFICATIONS
| Terminal No. (Application) | Specification |
|---|---|
| 4 (Chassis Ground) | Always Less Than One Ohm |
| 5 (Signal) | Always Less Than One Ohm |
| 16 (Battery Voltage) | Always 9-14 Volts |
Factory Service Tools
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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.
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