Fuel Injector Inspection

Reference: FUEL INJECTOR REMOVAL AND INSTALLATION 

1. Install injector to special tool (injector checking tool).

   Special Tool 

   1. 09912-58421 
   2. 09912-57610 
2. Connect special tools (hose and attachment) to fuel feed pipe (1) of vehicle.
3. Connect special tool (test lead) to injector.

   Special Tool 

   (C): 09930-88530 

   Fig 1: Identifying Special Tools

   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.
6. Operate fuel pump and apply fuel pressure to injector as follows:
   1. When using scan tool:
      1. Connect scan tool to DLC with ignition switch OFF.
      2. Turn ignition switch ON, clear DTC and select "Active Test" mode on scan tool.
      3. Turn fuel pump ON by using scan tool.

         Special Tool 

         (A): SUZUKI scan tool (SUZUKI-SDT) 

         Fig 2: Identifying Scan Tool Service Wire

         Courtesy of SUZUKI OF AMERICA CORP.
   2. When not using scan tool:
      1. Remove fuel pump relay from connector.
      2. Connect two terminals of relay connector using service wire (1) as shown in figure.
         CAUTION: Check to make sure that connection is made between correct terminals. Wrong connection can cause damage to ECM, wire harness, etc.
      3. Turn ignition switch ON.
         Fig 3: Identifying Injector Relay Terminals

         Courtesy of SUZUKI OF AMERICA CORP.
7. Apply battery voltage to injector (1) for 15 seconds and measure injected fuel volume with graduated cylinder. Test each injector two or three times. If injected volume is out of reference value greatly, replace injector.

   Reference injected fuel volume 

   Approx. 65 cc/15 sec. (2.20/2.29 US/lmp oz/15 sec.) 

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

   Fuel leakage 

   Less than 1 drop/min  .

   Fig 4: Checking Fuel Leakage From Injector Nozzle

   Courtesy of SUZUKI OF AMERICA CORP.