Am I being fobbed off??????
Am I being fobbed off??????
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nelly1

Original Poster:

5,665 posts

260 months

Friday 13th May 2005
quotequote all
Took my Tuscan in for its 30k service t'other day (won't say where). On the way there, noticed the fans were not cutting in (in monstrous traffic, it has to be said) even when coolant temps were in the 100's

Never mind, thinks I, the place of service is the right way to be going.

The service seems to go ok, but the fan problem apparently requires a new coolant temp. sensor, which won't be available 'till next week sometime.

What puzzles me is......the temp. on the dash was reading ok, but the 'faulty' ECU sensor was only reading into the high 60's, then stopping, hence the fans not coming in

How many temp. sensors has the SP6 engine got then?
Surely there's only one sensor feeding the ECU, which in turn tells the dash what to display?

I work with engine management systems day in, day out (albeit for a different company), but why would anyone go to the unnecessary expense, etc, of fitting two sensors to monitor the same thing?

If any light could be shed for me........

If there are two sensors, forgive my ignorance, but I've been 'delayed' by companies who are only too willing to 'push non-standard things to the back of the queue' too many times before!
Maybe they just haven't looked at the problem yet

Call me old fashioned, but once (or more!) bitten.....

zippee

14,124 posts

263 months

Friday 13th May 2005
quotequote all
Can't speak for the Tuscan but my Chim has 2, one for the fans and a seperate one for the guage.

19560

14,332 posts

287 months

Friday 13th May 2005
quotequote all
zippee said:
Can't speak for the Tuscan but my Chim has 2, one for the fans and a seperate one for the guage.

That's normal. One measures the temp. the other merely operates a switch when it reaches a certain temp..

nelly1

Original Poster:

5,665 posts

260 months

Friday 13th May 2005
quotequote all
Apparently it's all controlled by the ECU on the SP6. Sensor says how hot: module decides whether or not to switch the fans on.

GreenV8S

31,017 posts

313 months

Friday 13th May 2005
quotequote all
I can well believe you have one for the ECU and a separate one for the gauge. It's a simple thermister so connecting it to two circuits wouldn't work, and driving the temperature gauge from the ECU would be much harder than simply bunging in a second sensor. The RV8 powered cars have a separate otter switch for the fans, but as others have said on yours they're switched by the ECU.