Driver's Control Unit Input Test

Remove underdash fuse/relay box. Remove driver's unit from underdash fuse/relay box. Inspect connector terminals for damage or corrosion. Repair or replace as necessary. Using a DVOM, perform driver's control unit input test. See Fig 1 or Fig 2 . If all input tests are okay, replace driver's multiplex control unit.

Fig 1: Driver's Multiplex Control Unit Input Test (Accord)

Courtesy of AMERICAN HONDA MOTOR CO., INC.

Fig 2: Driver's Multiplex Control Unit Input Test (Prelude)

Courtesy of AMERICAN HONDA MOTOR CO., INC.