Circuit/System Testing
- With the ignition ON, install a scan tool.
- Activate and release the DIC switches.
- With the scan tool observe the DIC information switch parameter in the IPC scan tool Data List.
- If the scan tool displays Active and Inactive simultaneously, check for a poor connection at the harness connector of the DIC switch.
- With the ignition OFF, disconnect the DIC/Dimmer Switch.
- Connect a test lamp between the DIC switch signal and a good ground.
- If the test lamp illuminates, check the DIC switch signal circuits for a short to battery.
- If the circuit tests normal, replace the IPC.
- If the DIC switch signal circuits tests normal, replace the DIC switch.
- If the test lamp does not illuminate, replace the IPC.