2009 Suzuki 400 LTZ Quad Sport Service Manual, Page 93Get this manual
1A-29 Engine General Information and Diagnosis: Step Action 6) Disconnect the ECM couplerRefer to "ECM Removal and Installation in Section 1C (Page 1C-2)"7) Check the continuity between wire and terminal "5"Also, check the continuity between BBr wire and terminal "24"Tester knob indication Continuity) ECM coupler (Harness side) (A)
Yes Go to Step 2
No wire shorted to VCC or BBr wire open