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94 940 ECT Reference Voltage 900 1994

uid 27's pic
posted by  Art Benstein on  Sun Jan 12 20:14 CST 2020
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last visit: Fri Oct 17 20:10 CST 2014
[RELATED]

For grins, I'm gonna answer your question directly, but from a Bosch perspective, because I have no Regina ECU to look at. And I have a feeling you already know the mechanic's shop tech writers suggest using an ohmmeter.

In the Bosch ECU, the current source used to measure the ECT sensor's thermistor is generated by the circuit below.



So if you were asking about what you should see on the ECT connector from an LH2.4 ECU, I can confirm it would be near 4.6 V calculated from the resistor values when the thermistor is not present. In my experience, everything I've seen in Regina mirrors the Bosch when excluding the MAP sensor, titania O2, and IAT sensor part, so I will bet your Regina ECU is OK in that regard, and you won't need to spend $100 on a guess.
--
Art Benstein near Baltimore

98% OF AMERICANS SAY 'OH S***' BEFORE GOING IN THE DITCH ON A SLIPPERY ROAD.
THE OTHER 2% ARE FROM MAINE, NEW HAMPSHIRE & VERMONT, AND THEY SAY, 'HOLD MY BEER AND WATCH THIS.'






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