general information - Martin Nez

FI SYSTEM DIAGNOSIS 4-47“C15” (P0115-H/L) ECT SENSOR CIRCUIT MALFUNCTIONDETECTED CONDITIONC15 Output voltage is not within the followingrange.0.15 V Sensor voltage < 4.85 VP0115 Sensor voltage is higher than specifiedHvalue.Sensor voltage is lower than specifiedLvalue.POSSIBLE CAUSE• ECT sensor circuit open or short• ECT sensor malfunction• ECM malfunction• ECT sensor circuit open or ground circuit open• ECT sensor circuit shorted to groundECT sensorECMB/BIECTB/BrE2INSPECTIONStep 1 (When indicating C15:)1) Turn the ignition switch to OFF.2) Check the ECT sensor coupler for loose or poor contacts.If OK, then measure the ECT sensor voltage at the wire sidecoupler.3) Disconnect the coupler and turn the ignition switch ON.4) Measure the voltage between B/Bl wire terminal A andground.5) If OK, then measure the voltage between B/Bl wire terminalA and B/Br wire terminal B. ECT sensor voltage: 4.5 – 5.5 V(+ B/Bl – - Ground)(+ B/Bl – - B/Br) 09900-25008: Multi-circuit tester set Tester knob indication: Voltage ()Is the voltage OK?YES Go to Step 2.NO• Loose or poor contacts on the ECM coupler(terminal 0 or S).• Open or short circuit in the B/Bl wire or B/Brwire11V