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general information - Martin Nez

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4-50 FI SYSTEM DIAGNOSISStep 21) Turn the ignition switch to OFF.2) Disconnect the ECT sensor coupler.3) Measure the ECT sensor resistance.2 ECT sensor resistance:Approx. 2.3 – 2.6 kΩ at 20 °C(Terminal – Terminal) 09900-25008: Multi-circuit tester set Tester knob indication: Resistance (Ω)Refer to page 7-7 for details.Is the resistance OK?YES• B/Bl or B/Br wire open or shorted to ground, orpoor 0 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.2ECM couplers (Harness side)NOReplace the ECT sensor with a new one.4) After repairing the trouble, clear the DTC using SDS tool.(4-26) ECT sensor specificationEngine Coolant TempResistance20 °C Approx. 2.45 kΩ50 °C Approx. 0.811 kΩ80 °C Approx. 0.318 kΩ110 °C Approx. 0.142 kΩ

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