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W211 ENGINE ECU DTC
08-07-2022, 20:06 PM,
Post: #11
RE: W211 ENGINE ECU DTC
(08-07-2022, 19:57 PM)gcs190 Wrote:  
(08-07-2022, 19:49 PM)phydor Wrote:  
(08-07-2022, 19:41 PM)gcs190 Wrote:  Make sure the schematics are correct and the sensor references are the same, on those pins (according to your schematic) there should be temperature sensors.

As you can see from the screenshots, the sensors should be the same.But I am pretty sure that in case of disconnection, ECU should report open circuit.it throws same CEL no matter what.

It would be logical, I agree, that's why I have doubts that this second scheme is correct.

The problem is that those 2 sensors belong to an optional U704, in that second scheme, that says only EURO 4 engines.
I think that the ECU has the pins but no hardware connections to them.
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