ECT sensor wiring 1995 850 N/A Fenix 5.2

Post by **hausmeister** » 11 Jan 2023, 10:12

I only ever see these wires going into harnesses, never dug into these. But seems like they use a common sensor ground.
Looked up ecu pin A18, says "Signal ground sensor (measure with neg. batt.)"

have you measured resistance
- sensor wire ground pin on sensor side to ground?
- sensor wire ground pin ecu connector to ground?

If both are ok you should also get continuity, so one of these should be not ok in your case, is what I think.

Kokonradus · Post by **Kokonradus** » 12 Jan 2023, 03:23

Maybe it´s a stupid question, but how works the numbering of ECU pins? I could not find the pin that has continuity to ECT sensor ground on connector. I am sure only of those pins on the picture. Their numbers on schema are 31 and 32. Have no idea what is the numbering system and which pin or pins ,,should,, be the sensor ground 18.

: Pin numbering on ECU.jpg (244.84 KiB) Viewed 321 times

Post by **hausmeister** » 12 Jan 2023, 09:30

I think that is the best pic I have, maybe someone else has some more info on the connectors. Note its from a me4.4, but shouldn't matter for numbering.

: ecu connector 4.4.jpg (34.5 KiB) Viewed 307 times

Kokonradus · Post by **Kokonradus** » 10 Jul 2023, 03:17

PROBLEM SOLVED

Bad ECT connector contact. Replaced with new connector and problems are gone.

ECT sensor wiring 1995 850 N/A Fenix 5.2

Re: ECT sensor wiring 1995 850 N/A Fenix 5.2