2009 Suzuki 400 LTZ Quad Sport Service Manual, Page 126Get this manual
Engine General Information and Diagnosis: Step Action 5) If OK, then check the continuity between each terminal and groundTester knob indication Resistance) Injector continuity (Infinity) Yes Go to Step 2 1A-62
No Replace the injector with new oneRefer to "Fuel InjectorFuel Delivery PipeL-joint Removal and Installation in Section 1G (Page 1G-11)"
I933H1110066-02
GrW wire open or Open circuit in the OW shorted to ground, or wirepoor "16" connection2) Connect the ignition switch coupler and turn the ignition switch ON If wire and connection are OK, 3) Measure the injector voltage between OW wire and intermittent trouble or groundfaulty ECMSpecial tool Recheck each (A): 0990025008 (Multi-circuit tester set) terminal and poor (B): 0990025009 (Needle pointed probe set) connectionTester knob indication Replace the ECM Voltage) with known good Injector voltage one, and inspect it Battery voltage again((+) terminal: OW () terminal: Ground)