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, repair connectors and/or wiring between OBD-II DLC 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, repair or replace scan tool as necessary. If continuity does not exist, repair wiring between ground and OBD-II DLC.