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 |