Fuel Injector Inspection
Fuel Injector InspectionReference: Fuel Injector Removal and Installation
WARNING:
^ Before starting the following procedure, be sure to observe Precautions on Fuel System Service in order to reduce the risk of fire and personal injury.
^ Put injector and battery as far away as possible in order to reduce risk of fire and personal injury when connecting/disconnecting test lead to/from battery.
1. Install injector to special tool (injector checking tool).
Special Tool
(A) : 09912-58421
(B) : 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
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:
a. When using scan tool:
i. Connect scan tool to DLC with ignition switch OFF.
ii. Turn ignition switch ON, clear DTC and select Active Test mode on scan tool.
iii. Turn fuel pump ON by using scan tool.
Special Tool
(A) : SUZUKI scan tool (SUZUKI-SDT)
b. When not using scan tool:
i. Remove fuel pump relay from connector.
ii. 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.
iii. Turn ignition switch ON.
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.