general information - Martin Nez

FI SYSTEM DIAGNOSIS 4-81Is the voltage OK?2YESNO• W/G wire or B/Br wire open or shorted toground, or poor B or S connection.• If wire and connection are OK, intermittent troubleor faulty ECM.• Recheck each terminal and wire harness foropen circuit and poor connection.• Replace the ECM with a known good one, andinspect it again.Replace the HO2 sensor with a new one.ECM couplers (Harness side)6) After repairing the trouble, clear the DTC using SDS tool.(4-26)Step 1 (When indicating C44/P0135:)1) Turn the ignition switch OFF.2) Check the HO2 sensor for loose or poor contacts.If OK, then measure the HO2 sensor resistance.13) Disconnect the HO2 sensor coupler and measure the resistancebetween terminals.1 HO2 heater resistance: 4.0 – 5.0 Ω at 23 °C (W – W)NOTE:* Temperature of the sensor affects resistance value largely.* Make sure that the sensor heater is at correct temperature. 09900-25008: Multi-circuit tester set Tester knob indication: Resistance (Ω)Is the voltage OK?YES Go to Step 2.NO Replace the HO2 sensor with a new one.4) After repairing the trouble, clear the DTC using SDS tool.(4-26)