Control Unit Input Test
- Before testing, troubleshoot the multiplex control system (see TROUBLESHOOTING ).
- Remove the dashboard lower cover.
- Disconnect the under-dash fuse/relay box connectors B, G, J, X and Y.NOTE: All connectors are wire side of female terminals.
- Inspect the connector and socket terminals to be sure they are all making good contact.
- If the terminals are bent, loose or corroded, repair them as necessary, and recheck the system.
- If the terminals are OK, go to step 5.
- Reconnect the connectors, and make these input tests at the connector.
- If any test indicates a problem, find and correct the cause, then recheck the system.
- If all the input tests prove OK, the multiplex control unit must be faulty; replace the under-dash fuse/relay box assembly.