2009 Suzuki 400 LTZ Quad Sport Service Manual, Page 113Get this manual
1A-49 Engine General Information and Diagnosis: P0110-H (Use of SDS) Step Action 1) Turn the ignition switch OFFYes Connect the ECM 2) Check the IAT sensor coupler for loose or poor contactscoupler and go to step 2If OK, then check the IAT sensor lead wire continuityNo Dg or BBr wire open I933H1110046-01
3) Disconnect the IAT sensor coupler4) Disconnect the ECM couplerRefer to "ECM Removal and Installation in Section 1C (Page 1C-2)"5) Check the continuity between the Dg wire and terminal "25"Also, check the continuity between the BBr wire and terminal "24"Special tool (A): 0990025008 (Multi-circuit tester set) (B): 0990025009 (Needle pointed probe set) Tester knob indication Continuity test) ECM coupler (Harness side)