general information - Martin Nez

FI SYSTEM DIAGNOSIS 4-61Step 1 (When indicating P1651-H:)1) Turn the ignition switch to OFF.2) Lift and support the fuel tank. (5-3)3) Check the TO sensor coupler for loose or poor contacts.If OK, then check the TO sensor lead wire continuity.14) Disconnect the TO sensor coupler.5) Check the continuity between R wire A and B wire B.If the sound is not heard from the tester, the circuit condition isOK.1]6) Disconnect the ECM coupler.7) Check the continuity between B wire B and terminal L.8) Also, check the continuity between B/Br wire C and terminal S.1] TOS lead wire continuity: Continuity () 09900-25008: Multi-circuit tester set09900-25009: Needle pointed probe set Tester knob indication: Continuity test ()Is the continuity OK?ECM couplers (Harness side)YES Go to Step 2.NO Black wire shorted to VCC, or B/Br wire open.9) After repairing the trouble, clear the DTC using SDS tool.(4-26)