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Are live values reliable?
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sceh
 


Member Since: 14 Sep 2011
Location: annecy
Posts: 233

France 2011 Discovery 4 3.0 TDV6 S Auto Chawton WhiteDiscovery 4
Are live values reliable?

I am reading the steering angle sensor value and voltage in live values but sometimes the angle will be stuck at a value and the voltage will be either too low (0.25V) or too high (22)
I can't reliably repeat this behaviour to see if it is the tool or the car. Has anyone else had similar experience?
I attach two graphs as an example

thanks
Click image to enlarge

Click image to enlarge
  
Post #228529527th Mar 2022 1:06 pm
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Disco_Mikey
 


Member Since: 29 May 2007
Location: Dundee, Scotland
Posts: 20713

Scotland 2005 Discovery 3 TDV6 HSE Auto Cairns BlueDiscovery 3

I see an SAS supply voltage of 14.8-15.0v, which is perfectly normal... Confused
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Post #228530327th Mar 2022 2:18 pm
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sceh
 


Member Since: 14 Sep 2011
Location: annecy
Posts: 233

France 2011 Discovery 4 3.0 TDV6 S Auto Chawton WhiteDiscovery 4

In both cases yes but in the second there are no other signals..
  
Post #228532127th Mar 2022 5:06 pm
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sceh
 


Member Since: 14 Sep 2011
Location: annecy
Posts: 233

France 2011 Discovery 4 3.0 TDV6 S Auto Chawton WhiteDiscovery 4

and the internal status is false too and the angle is fixed
  
Post #228532327th Mar 2022 5:12 pm
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Disco_Mikey
 


Member Since: 29 May 2007
Location: Dundee, Scotland
Posts: 20713

Scotland 2005 Discovery 3 TDV6 HSE Auto Cairns BlueDiscovery 3

Do you have any idea what the SAS internal status value means?
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Post #228533627th Mar 2022 5:46 pm
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sceh
 


Member Since: 14 Sep 2011
Location: annecy
Posts: 233

France 2011 Discovery 4 3.0 TDV6 S Auto Chawton WhiteDiscovery 4

Not really but I had status TRUE on another graph which worked so I think it might mean the sensor is OK in some way. Why we do not have all these things in the GAP manual is a mystery. I will ask Patrick
  
Post #228533827th Mar 2022 5:56 pm
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sceh
 


Member Since: 14 Sep 2011
Location: annecy
Posts: 233

France 2011 Discovery 4 3.0 TDV6 S Auto Chawton WhiteDiscovery 4

Patrick just said to check the actual angle and see if it moves smoothly but didn't directly answer the status question
  
Post #228534227th Mar 2022 6:14 pm
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Disco_Mikey
 


Member Since: 29 May 2007
Location: Dundee, Scotland
Posts: 20713

Scotland 2005 Discovery 3 TDV6 HSE Auto Cairns BlueDiscovery 3

Because its largely irrelevant, unless your having a specific issue...
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Post #228535927th Mar 2022 8:09 pm
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sceh
 


Member Since: 14 Sep 2011
Location: annecy
Posts: 233

France 2011 Discovery 4 3.0 TDV6 S Auto Chawton WhiteDiscovery 4

I suppose if the angle can be read (it is deduced by the ECU from the return voltage) then the sensor works so why does this parameter exist? Odd
  
Post #228541928th Mar 2022 7:28 am
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Disco_Mikey
 


Member Since: 29 May 2007
Location: Dundee, Scotland
Posts: 20713

Scotland 2005 Discovery 3 TDV6 HSE Auto Cairns BlueDiscovery 3

It's there from JLR, for some pretty specific issues. I've never had the need to utilise 99% of the live data values for the last 17 years, but it needs to be there, just in case Thumbs Up
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Post #228542428th Mar 2022 7:57 am
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sceh
 


Member Since: 14 Sep 2011
Location: annecy
Posts: 233

France 2011 Discovery 4 3.0 TDV6 S Auto Chawton WhiteDiscovery 4

From this morning and the status is TRUE

Click image to enlarge


I get the impression the sensor is OK and there is an intermittent fault somewhere - but where?
  
Post #228544028th Mar 2022 8:51 am
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sceh
 


Member Since: 14 Sep 2011
Location: annecy
Posts: 233

France 2011 Discovery 4 3.0 TDV6 S Auto Chawton WhiteDiscovery 4

I am getting the impression the sensor works but has had an intermittent connection problem caused by a bad contact. If I make sure the angle reads OK before starting, I don't get any warning light at all
  
Post #228545828th Mar 2022 10:34 am
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Disco_Mikey
 


Member Since: 29 May 2007
Location: Dundee, Scotland
Posts: 20713

Scotland 2005 Discovery 3 TDV6 HSE Auto Cairns BlueDiscovery 3

What issue are you having with the car? Rolling Eyes
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Post #228546428th Mar 2022 11:31 am
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sceh
 


Member Since: 14 Sep 2011
Location: annecy
Posts: 233

France 2011 Discovery 4 3.0 TDV6 S Auto Chawton WhiteDiscovery 4

The usual million warning lights - HDC, ABS, EBD, gearbox etc etc.
LR can't find the fault though I am not sure they are doing either more than using their SDD tool which seems to be no better or more comprehensive than IID
  
Post #228547528th Mar 2022 12:26 pm
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Disco_Mikey
 


Member Since: 29 May 2007
Location: Dundee, Scotland
Posts: 20713

Scotland 2005 Discovery 3 TDV6 HSE Auto Cairns BlueDiscovery 3

So what faults do you have
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Post #228551228th Mar 2022 5:01 pm
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