Information Bus: Testing and Inspection

ECM Data Line

1. If all components are not accessible with a scan tool, check for an open in the ORN (461) wire between ALDL connector, terminal M and S144.
2. If a single component is not accessible with a scan tool, check for an open in the ORN (461) wire between S144 and the component. If the wire is OK, refer to Electronic Control Module diagnosis and/or ABS diagnosis.