Technical Stilo Steering angle sensor

Currently reading:
Technical Stilo Steering angle sensor

Timppa83

New member
Joined
Jan 14, 2011
Messages
15
Points
5
My JTD stilo has strange fault.

Power steering is out of order and there isn't any fault codes on it.

Car was today in local fiat carage and they tried to calibrate power steering but didn't managed to do it. fiat tester said that steering angle sensor signal is missing and thats why they couldn do calibration.

And they said that they don't know whats wrong with it, because it don't give any fault codes.

fault came when my battery died and i tried to start car with low battery, it crank slowly and all light was flashing in console. I tried couple times and then it started to give all kind of fault messages. When i installed new battery, power steering fault didn't go away.

Have any one faced problem like that?
Is there some sensor for steering angle or is it taking measures in that spring what is steering wheel behaind airbag unit?

If the sensor is that spring, and it's broken it supposed to give airbag fault allso?

Strange thing #1 is that fault come when i was trying to start the car with bad battery. so what can go broken then?

Strange thing #2 is that it don't give any fault codes
 
Sorry to sound obvious but have you checked both power steering fuses?
Low battery voltage = higher current =blown fuses

Steering fault codes come from steering ECU fed on K line diagnostics connector pin 9 but if there's no power to the steering ECU then you won't get anything out
 
Last edited:
Sorry to sound obvious but have you checked both power steering fuses?
Low battery voltage = higher current =blown fuses

Steering fault codes come from steering ECU fed on K line diagnostics connector pin 9 but if there's no power to the steering ECU then you won't get anything out


Agreed, if they were looking at the engine ECU then tere will be no code, but the steering angle sensor doubles up on this model and it can bechecked for faults on both the Steering ECU and the ABS ECU.
 
But you say you are not getting any faults recorded so is there power going to the steering column ECU, have you checked the fuses and the power arriving at the steering column?
How did they find no signal was coming from the steering angle sensor?
 
All fuses is checked, an they are ok.
I able to log in to steering ecu so it alive, but in fes and fiat scanner show that steering angle is 0,0 deg all time.
I had little brain storm with local fiat diler today and they said that it has to have steering angle position data even when car dosen't have drive control system ( i don't know is it right term for that). before i wasn't sure for that, i tought that it's needed when car have drive control.
But i was wrong

So my steering angle sensor is dead,and it can not be changed separately. I have to change hole power steering motor packed.

Next question is: is the power steering motor similar in left hand drive and right hand drive cars?

In my motor has codes:

TRW #: 81815
Fiat # : 00046846858

If the unit is same in all Stilos then i have lot more where to chose used part.

with short seeking i have found motors with 3 different fiat part number, but all of them have same TRW #. why fiat part number is different and can they be mixed. I mean will some other fiat part # motor work on me?

Fiat part # what i have found:
00046846858 (this is what i have)
00046826731
00051723101
 
Last edited:
There's a steering torsion sensor inside the power steering unit but I think the steering wheel angle sensor is up by the steering wheel. That would make more sense

steering angle sensor.JPG
A Steering wheel angle sensor (not Stilo)

steering system schematic electrics 3JPG.JPG
Steering torsion sensor, inside the unit =how much twist= how much force is being applied
No steering wheel angle sensor in there

steering angle sensor 3.JPG
Stilo steering wheel angle sensor connector= how much angle steering wheel is being turned


clock spring.JPG
 
Last edited:
So if i understand right, steering wheel angle sensor is separated unit? it's not in same packed than motor,etc???

i had to check in FES, there is in parametric for Rotation Angle sensor, and that value is all the time 0,0 deg. Even if i rotate wheel.

So is that value coming from steering wheel angle sensor (clock spring), or some where inside motor unit?

And if that Angle sensor is in clock spring, why fiat said that hole motor unit have to be change? or is everything molded in same part?

I'm so confused right now.
 
@ Deckchair5

View attachment 86007
Stilo steering wheel angle sensor connector= how much angle steering wheel is being turned

Strange they say the steering wheel angle sensor is in the clockspring. :confused: I opened a spare one a while ago, all that's in there is a long loosely coiled ribbon cable with enough 'ways' to connect the horn and steering wheel buttons to the wiring loom.
 
@ Deckchair5



Strange they say the steering wheel angle sensor is in the clockspring. :confused: I opened a spare one a while ago, all that's in there is a long loosely coiled ribbon cable with enough 'ways' to connect the horn and steering wheel buttons to the wiring loom.


yes,it's strange.
i found this topic https://www.fiatforum.com/stilo/233633-steering-angle-sensor.html topic starter had problem with steering angle sensor (like i have allso....i think) and solution for that regarding those posts was replacing hole steering unit...if i got it right...
so it don't have anything to do with clock spring!?

but strange thing is that he didn't have any problems with power steering,even when angle sensor was dead!!!
 
The steering wheel angle sensor is part of the ESP/ABS system
steering wheel sensor.JPG
Item K58. It's a separate component away from the power steering unit

steering sensor description.JPG

Maybe your techs are calling it the wrong name when they are saying the "Steering wheel angle sensor"


steering system schematic electrics 2JPG.JPG
-I suspect they mean the torsion sensor as this also measures angle of movement of the steering, is inside the steering column but it compares the difference in angle of twist at the top and the bottom of the torsion shaft so it's measuring two angles and comparing them. It tells the power steering unit which way to turn and how fast. If they're not getting any signal out of it then they won't be able to calibrate it
 
Last edited:
I had to check what carage wrote to my invoice. i don't know how to translate it right but text was something like this.

Tried to do calibration, but didn't managed to finish it. tester complains angle of rotation signal is missing.

but at least i know now that clock spring don't have anything to do with power steering.

I think only solution to get it work is change steering column....meaby...

in England ebay has couple cheap steering units, but they have differend part number than i have...excample this one http://cgi.ebay.co.uk/FIAT-STILO-EL...arts_Vehicles_CarParts_SM&hash=item4155cbf365

How i can now can it be fitted to my car.
of course it will need calibration/learning, but is there any information available what is differences between each part numbers? or something
 
This post contains affiliate links which may earn a commission at no additional cost to you.
Yes that will be the torsion sensor

It's very difficult to find compatibility from ePer so you really have to do your own research amongst suppliers and dealers and hope for the best. You'd need to provide Vin No /year /engine LH or RH drive. Send the info to the seller to see if they can say whether it will work on your car
ePer here says Part No 46826718 and it's the same for LH and RH drive

Quite a few people have fitted replacement steering columns with no compatibility issues and have just needed a calibration
 
Last edited:
When i start to change steering colum, do i need to do something special when i remove clock spring? wheels straight,something more.
Main thing is that is there risk to **** tension of the spring when i remove it, or what kind of construction it have? can i just take it away or do i need to lock it somehow before?
 
When you connect with FES what do you get for the following parameters:
- Status
- CAN: Alternator status

The power steering unit does not work when alternator is not charging (or when the ECU thinks that it is not charging).

"Rotation angle sensor" parameter does not work on all vehicles. I always get 0 on my Stilo and the sterring is working fine.
 
Good points Yani
If you check for over 14v at the power steering unit as advised in post 5 then you know alternator is supplying sufficient power at the column

There's a difference between 0v ie system is in balance and "signal missing". I wonder what the techs actually meant?
 
Last edited:
When you connect with FES what do you get for the following parameters:
- Status
- CAN: Alternator status

The power steering unit does not work when alternator is not charging (or when the ECU thinks that it is not charging).

"Rotation angle sensor" parameter does not work on all vehicles. I always get 0 on my Stilo and the sterring is working fine.


Status is OFF-no fault
can altenator is CHARCHING

and car is really charching.
 
Back
Top