Inspection Of Cruise Control System Circuit
WARNING: This page is about a different car, the 2006 Suzuki Grand Vitara. However, it is still accessible from the selected car via links, so may be relevant.
Cruise control system is controlled by ECM. Each switch and circuit can be checked by taking measurement of terminal voltage and terminal to terminal resistance of ECM. When measuring these values, be sure to read precautions for measurement described under PRECAUTIONS OF ECM CIRCUIT INSPECTION .