Hi all...

I am tracking down the issue of a coolant fan that does not work.
I have read as much as I can on it and have tried numerous solutions...too many to list really.

my question here is does anyone know where does that ScanGaugeII get the reading for coolant temp?
I assume the ECU, but does that mean it comes from the coolant temp sensor?

basically, if my SCII reading is accurate, does that mean my coolant temp sensor should be working properly (sending correct info the the ECU, which SHOULD then send current to the coolant fans to turn on).

Thank you in advance!

 

I performed first start up on my R53 last night after a removal for upgrades. I used my Scan Gauge to monitor the temps and it was accurate. My low speed fans (power steering fan too) came on at 215 and the high speed at 235.

below is the temp chart.

 

jjcsnlynn,

Wish I were in your boat...or car in this case.
I do know the temp trigger numbers, but was trying to trouble shoot why mine is not coming on...

my question is where does that ScanGaugeII get the reading for coolant temp?
I assume the ECU, but does that mean it comes from the coolant temp sensor? if so, that will tell me at least that part is working and I can move on to something else....

 

The scangauge pulls everything through the OBDII port from the DME. I only know of the one coolant temp sensor.

 

If your ScanGauge is showing coolant temperature than the sensor is not your problem. Will the fans run on high when the AC is on? It's probably the fan speed resistor.