BRN Wire Communication Line Test
BRN Wire Communication Line Test1. Remove the driver's multiplex control unit from the driver's under-dash fuse/relay box.
2. Carefully pry off the driver's door switch trim.
3. Disconnect door multiplex control unit connector A (20P).
4. Check for continuity between the A2 terminal of the driver's under-dash fuse/relay box socket and the No.15 terminal of door multiplex control unit connector A (20P).
Is there continuity?
YES - Replace the multiplex control unit most closely related to the failure.
NO - Repair an open in the wire between the door multiplex control unit connector and the driver's under-dash fuse/relay box. If the wire is OK, replace the driver's under-dash fuse/relay box.