Suzuki GRAND VITARA Owner's Manual page 102

1A-47 Engine General Information and Diagnosis:
Step
13 Check fuel injector for operation
1) Install spark plugs and connect injector connectors.
2) Using sound scope (1), check operating sound of each
injector (2) when cranking engine.
Was injector operating sound heard from all injectors?
Action
I3RM0A110015-01
Yes
Go to "Engine Symptom
Diagnosis: ".
No
Go to "Fuel Injector
Circuit Check: ".