L322 Viscous Fan Speed

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marjon said:
Hummm missed that bit;)

Did you perhaps damage the sensor on the front of the fan when you took it off?
I have not been in amongst mine so don’t know.

J
Click to expand...


That I cant answer. the fan came off quite easily with a pully bar and the 36mm fan spanner, grip strength only. however its reasonable to suspect that after a number of years and rotations, it was on the way out, moving it and laying on its side may well have been the end point. funnily enough its been quiet today
 
Datatek said:
I read that as hall effect device is used to detect fan speed. The sensible way of doing that would be to mount the hall effect device on a stationary part and the passive trigger on the rotating part, however there is very little that is sensible in the L322 electronics so who knows, the whole thing is bonkers, a variable electric fan would do the job as is the case on many other vehicles..
Click to expand...


yes it does it has a cable that comes out of the back of the hub and connects to a plug on the cowling. why make it simple when you can make it complex !
 
Here we go.

Note the VF and engine speed at different points.
Screenshot_20190825-111049_IIDControl.jpg
Screenshot_20190825-111521_IIDControl.jpg
Screenshot_20190825-112258_IIDControl.jpg
 
Doing a bit more reading and it seems my 2011 TDV8 don’t have it;)
Had a quick look, but can’t see much.
Seems my manual may stop at 2009. Which seems fine for mechanical setup.

So off on the hunt for another manual that covers 2011.:eek::)

J
 
On gap tool, there is an advanced menu for faults, can't remember exactly which ones I select but you will get a shed load more faults showing. If I do that and clear them it then works OK.
Click to expand...

Pending faults?

How does it detect the viscous speed? Hall sensor? How would that read high
 
Hall sensor

the water pump pully is a smaller in diameter to the main pully giving ratio. so it would give a fan speed higher than the crank speed. im not sure if the electonics just measure the speed or provide clutch engagement. I suspect not as that would moot the viscous couple need.
 
Has anyone looked at or found any data on the viscous fan PWM signal from the ECM and the associated wiring arrangement?
 
Hi guys

I had an issue with My L322 2008 VC FAN , it runs continuously... No fault codes.. however i have swapped it with other 2 cars in my friend's garage and same result..

On OBDII live data shows fan speed is 0 .. so I think that's why its running all the time..

Anyone knows where is that speed sensor located (hall effect sensor) ? Is it part of the fan module itself?

Thanks
 
42er10 said:
Has anyone looked at or found any data on the viscous fan PWM signal from the ECM and the associated wiring arrangement?
Click to expand...


I'm looking for the same thing also.. i need to locate the speed sensor and related connection.

Did you manage to get it?

Thanks
 
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