2009 Suzuki 400 LTZ Quad Sport Service Manual, Page 88Get this manual
Engine General Information and Diagnosis: Step Action 1) Turn the ignition switch OFF2) Check the CKP sensor coupler for loose or poor contactsIf OK, then measure the CKP sensor resistanceYes Go to Step 2 1A-24
No Replace the CKP sensor with new one
I933H1110013-01
3) Disconnect the CKP sensor coupler and measure the resistanceSpecial tool (A): 0990025008 (Multi-circuit tester set) Tester knob indication Resistance) CKP sensor resistance 400 600 (Bl G)