FI SYSTEM DIAGNOSIS 4-53 Step 1 (When indicating P0110-H:) 1 1) Turn the ignition switch OFF. 2) Lift and support the fuel tank. (5-3) 3) Check the IAT sensor coupler for loose or poor contacts. If OK, then check the IAT sensor lead wire continuity. 4) Disconnect the IAT sensor coupler and ECM coupler. 1 5) Check the continuity between Dg wire A and terminal Q. 6) Also, check the continuity between B/Br wire B and terminal S. IATS lead wire continuity: Continuity () 09900-25008: Multi-circuit tester set 09900-25009: Needle pointed probe set (Gray) Tester knob indication: Continuity test () (Black) ECM coupler (Harness side) Is the continuity OK? E YES Go to Step 2. L NO Dg wire or B/Br wire open P 7) After repairing the trouble, clear the DTC using SDS tool. (4-27) AM S