Testing Procedure
WARNING: This page is about a different car, the 2002 Hyundai XG350. However, it is still accessible from the selected car via links, so may be relevant.
Check for open, short, high resistance or poor terminal connection in power supply to suspect control modules. See POWER DISTRIBUTION in XG350 article in 2002 SYSTEM WIRING DIAGRAMS HYUNDAI. If problem is found, repair as necessary. After repair, retest system.