Recent content by wales660

  1. W

    ECT 5 volt reference

    Hi I get it now but must admit i was looking at it totally wrong , thinking the sensor ground was summin else. Thinking of it now with sensor grounds being sometimes shared i dont know what i was thinking there. Guess i didn't understand the circuit. Just need to work out now what the voltage...
  2. W

    ECT 5 volt reference

    Ok thanks vehicle electrics work in mysterious ways Thanks Jeff
  3. W

    ECT 5 volt reference

    Hi The 5 volts is my supply voltage to the ECT so you saying the supplies voltage is changed by the ECT resistance and travels back down the same wire? My understanding is 5 volts reference will enter the ECT on one leg and as there’s a resistor which is variable to heat it will alter the...
  4. W

    ECT 5 volt reference

    Hi I understand what the diagram is but this is an engine coolant sensor which talk to the engine control unit using voltage to determine the fuel trim to the injectors. The engine control unit looks for a voltage range to work with. Eg. 5 volts being say 5 degrees and 1 volt being 90 degrees...
  5. W

    ECT 5 volt reference

    My ECT 5 volts reference is dropping to 2.3 volts when the sensors is plugged in. What could be causing the volt drop please? Also return voltage to the ECM is nothing at all Thanks Jeff

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