2009 Suzuki 400 LTZ Quad Sport Service Manual, Page 130Get this manual
Engine General Information and Diagnosis: Troubleshooting NOTE After repairing the trouble, clear the DTC using SDS toolRefer to "Use of SDS Diagnosis Reset Procedures (Page 1A-12)"Step Action 1) Turn the ignition switch OFF2) Remove the front fenderRefer to "Exterior Parts Removal and Installation in Section 9D (Page 9D-4)"3) Check the cooling fan relay coupler for loose or poor contactsIf OK, then inspection the cooling fan relayRefer to "Cooling Fan Relay Inspection in Section 1F (Page 1F10)"Yes OY and YB wire open or shorted to ground, or poor "33" connection If wire and connection are OKintermittent trouble or faulty ECM Recheck each terminal and wire harness for open circuit and poor connection Replace the ECM with known good one, and inspect it againRefer to "ECM Removal and Installation in Section 1C (Page 1C-2)" 1A-66