Control Unit Input Test

NOTE:
^ Before testing, go to the Troubleshooting Guide.
^ All connector views are from the wire side of female terminals unless otherwise noted.

Control Unit Input Test:

Multiplex Control Unit (Driver's):
1. Remove the under-dash fuse/relay box.
2. Remove the driver's unit from the under-dash fuse/relay box.
3. 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 look OK, make the following input tests at the fuse/relay box socket.
- If any test indicates a problem, find and correct the cause, then recheck the system.
- If all the input tests prove OK, the control unit must be faulty; replace it,

Control Unit Input Test:

Disconnect the connectors from the unit.