ECM Power & Ground Circuits
WARNING: This page is about a different car, the 2003 Suzuki XL-7, 2003 Suzuki Vitara, 2003 Suzuki Grand Vitara, and 2003 Suzuki Aerio. However, it is still accessible from the selected car via links, so may be relevant.
For ECM power and ground circuit testing, see A3: ENGINE CONTROL MODULE POWER & GROUND CIRCUIT CHECK/ENGINE DOES NOT START under SYSTEM TEST in appropriate SELF DIAGNOSTICS article.