2009 Suzuki 400 LTZ Quad Sport Service Manual, Page 100Get this manual
Engine General Information and Diagnosis: P0115-H (Use of SDS) Step Action 1) Turn the ignition switch OFF2) Check the ECT sensor coupler for loose or poor contactsIf OK, then check the ECT sensor lead wire continuityYes Go to Step 2 1A-36
No BBl or BBr wire open
I933H1110039-01
3) Disconnect the ECT sensor coupler4) Disconnect the ECM couplerRefer to "ECM Removal and Installation in Section 1C (Page 1C-2)"5) Check the continuity between BBl wire and terminal "22"Also, check the continuity between 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)