No Communication With All Systems
- Check voltage between ground and OBD-II Data Link Connector (OBD-II DLC) terminal No. 16. If battery voltage does not exist, check junction connectors and wiring harness between OBD-II DLC terminal No. 16 and power supply. If battery voltage exists, go to next step.
- Check continuity between ground and OBD-II DLC terminals No. 4 and 5. If continuity exists on both circuits, replace scan tool. If continuity does not exists on either circuit, check wiring harness between ground and appropriate OBD-II DLC terminal.