old postjust like all cars.with a compression gauge.but not all gauges, work , only the long hose screw in type worknever the V8 style. short, rubber tips, (fail)if how means, what is the procedure, well that is the same for all EFI cars. (and safty steps)you didnt state the engine type, size?but most suzuki run 170psi min.cold or 185 hot.the 12 steps (1.6L)
http://www.fixkick.com/compressiontest.htmlif you want, the FSM covers this.or atalldata dot comsafety:keep in mind if you let the injector squirt fuel and spark is enabled too , you invite danger to you .A pro defeats the fuel buy killing the fuel pump.I defeat both, spark an fuel then do the compression tests.the spark can hit 100,000 volts open circuit and if it reaches outto you, that can cause Pain or worse.most GV have , COPS, Coil over plugsfues 39 IG-COIL fuse kills the COPS.and it think sill allows cranking. via engine bay fuse 2.so pull IG-coil in the cab, next to left toes, for max safety.