general information - Martin Nez

4-68 FI SYSTEM DIAGNOSIS STP sensor input voltage: 4.5 – 5.5 V(+ R – - Ground)(+ R – - B/Br) 09900-25008: Multi-circuit tester set Tester knob indication: Voltage ()Is the voltage OK?YES Go to Step 2.• Loose or poor contacts on the ECM couplerNO (terminal A or S)• Open or short circuit in the R wire or B/Br wireStep 1 (When indicating P1654-H:)1) Turn the ignition switch to OFF.2) Lift and support the fuel tank. (5-3)3) Remove the air cleaner box and lift up the throttle body.(5-13)4) Check the STP sensor coupler for loose or poor contacts.If OK, then check the STP sensor lead wire continuity.11V5) Disconnect the STP sensor coupler.6) Check the continuity between Y/W wire B and R wire A.If the sound is not heard from the tester, the circuit conditionis OK.1]7) Disconnect the ECM coupler.8) Check the continuity between Y/W wire B and terminal J.9) Also, check the continuity between B/Br wire C and terminalS. STPS lead wire continuity: Continuity () 09900-25008: Multi-circuit tester set09900-25009: Needle pointed probe set Tester knob indication: Continuity test ()1ECM couplers (Harness side)]Is the continuity OK?YES Go to Step 2.NO Y/W wire shorted to VCC, or B/Br wire open10) After repairing the trouble, clear the DTC using SDS tool.(4-26)