DLC No. 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 step 2). If scan tester does not operate on another vehicle, problem is probably with scan tester.
- Note location of DLC No. 3 and DLC No. 3 terminals. See Figure and Fig 1 . Ensure voltage and resistance is correct at specified terminals when checking between terminal on Data Link Connector (DLC) No. 3 and body ground. See DLC NO. 3 VOLTAGE & RESISTANCE SPECIFICATIONS table. If voltage and resistance is not as specified, check wiring Circuit See appropriate wiring diagram at the end of this 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) | Always One Ohm Or Less |
| 5 (Signal Ground) | Always One Ohm Or Less |
| 16 (Battery Positive) | Always 9-14 Volts |