FI SYSTEM DIAGNOSIS 4-39 6) Disconnect the ECM coupler. 1 ! 7) Check the continuity between G/B wire B and terminal 9. 8) If OK, then check the continuity between B/Br wire C and ter- minal S. IAPS lead wire continuity: Continuity () 09900-25008: Multi-circuit tester set 09900-25009: Needle pointed probe set Tester knob indication: Continuity test () (Black) (Gray) ECM coupler (Harness side) Is the continuity OK? YES Go to Step 2. NO G/B wire shorted to VCC, or B/Br wire open. 9) After repairing the trouble, clear the DTC using SDS tool. (4-27) Step 1 (When indicating P0105-L:) 1 1) Turn the ignition switch OFF. 2) Lift and support the fuel tank. (5-3) 3) Check the IAP sensor coupler for loose or poor contacts. E If OK, then check the IAP sensor lead wire continuity. L P M 4) Disconnect the IAP sensor coupler. 1 A 5) Check the continuity between G/B wire B and ground. 6) Also, check the continuity between G/B wire B and B/Br wire S C. If the sound is not heard from the tester, the circuit condi- tion is OK.