Fuel Injector Inspection

1. Install injector (2) and fuel pressure regulator (3) to special tool (injector checking tool).
   NOTE: Remove grommet from injector, then install injector to special tool and tighten bolts by hand.

   Special tool 

   (A): 09912-58421

2. Connect special tools (hoses and attachment) to pipes of vehicle.

   Special tool 

   (B): 09912-58432

3. Connect special tool (test lead) to injector.

   Special tool 

   (C): 09930-88530

   Fig 1: Inspecting Fuel Injector

   Courtesy of SUZUKI OF AMERICA CORP.
4. Install suitable vinyl tube onto injector nozzle to prevent fuel from splashing out when injecting.
5. Put graduated cylinder under injector as shown.
6. Operate fuel pump and apply fuel pressure to injector as follows:
   1. When using SUZUKI scan tool:
      1. Connect SUZUKI scan tool to DLC (1) with ignition switch OFF.
      2. Turn ignition switch ON, write down DTC then clear DTC and select "MISC. TEST" mode on SUZUKI scan tool.
      3. Turn fuel pump ON by using SUZUKI scan tool.
   2. When not using SUZUKI scan tool:
      CAUTION: Check to make sure that connection is made between correct terminals. Wrong connection can cause damage to ECM, wire harness, etc.
      1. Remove fuel pump relay from connector.
      2. Connect two terminals of relay connector using service wire (2) as shown in figure.
      3. Turn ignition switch ON.
         Fig 2: Connecting SUZUKI Scan Tool To DLC

         Courtesy of SUZUKI OF AMERICA CORP.
7. Apply battery (2) voltage to injector (1) for 15 seconds and measure injected fuel volume with graduated cylinder. Test each injector two or three times. If not within specification, replace injector.

   Injected fuel volume 

   About 71.8 - 76.2 cc/15 sec. (2.43 - 2.57/2.53 - 2.68 US/Imp. oz./15 sec.) at 20 °C, 68 °F

   Fig 3: Measuring Injected Fuel Volume With Graduated Cylinder

   Courtesy of SUZUKI OF AMERICA CORP.
8. Check fuel leakage from injector (1) nozzle. Do not operate injector for this check (but fuel pump should be at work). If fuel leaks more than the following specifications, replace.

Fuel leakage 

Less than 1 drop/min.

Fig 4: Measuring Injected Fuel Volume

Courtesy of SUZUKI OF AMERICA CORP.