Driver's Multiplex Control Unit
Remove underdash fuse/relay block. See INSTRUMENT PANEL FUSE/RELAY BLOCK under REMOVAL & INSTALLATION. Remove driver's multiplex control unit from fuse/relay block. Inspect connector terminals for damage or corrosion. Repair or replace as necessary. Using a DVOM, perform driver's multiplex control unit input test. See Fig 1 . If all input tests are okay, replace driver's multiplex control unit.