2009 Suzuki 400 LTZ Quad Sport Service Manual, Page 119Get this manual
1A-55 Engine General Information and Diagnosis: Step Action Yes Go to Step 21 7) Check the continuity between BrW wire and terminal "2"Also, check the continuity between BBr wire "C" and terminal "24"Special tool (B): 0990025009 (Needle pointed probe set) Tester knob indication Continuity test) ECM coupler (Harness side) (A)
No BrW wire shorted to VCC, or BBr wire open