DLC No. 3 Inspection
- 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 appropriate wiring diagram in SYSTEM WIRING DIAGRAMS article. 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 appropriate wiring diagram in SYSTEM WIRING DIAGRAMS article.
NOTE:
Terminal No. 2 on DLC No. 3 provides the pulse generation during the information transmission from the Engine Control Module (ECM).
DLC NO. 3 VOLTAGE & RESISTANCE SPECIFICATIONS
| Terminal No. (Application) | Specification |
|---|---|
| 4 (Chassis Ground) | One Ohm or Less |
| 5 (Signal) | One Ohm or Less |
| 16 (Battery Voltage) | 9-14 Volts |