Member Since: 18 Jan 2021
Location: Morpeth
Posts: 102
Ok, here we go.
Freshly charged battery, kicking out 12.63vDC at the terminals.
Removed Fuses 52 and 58 which both relate to the telephone, this tripped off the nav screen too. The fault still came back. Full codes below.
VIN: SALLAAA139A511904
L319 - Discovery 3 2009
Vehicle scanned on 23-02-2021 17:56
Using IIDTool BT V4.0 B2691
Airbag
U0122-87 (2C) Lost communication with vehicle dynamics control module - Bus signal/message failure - missing a message
( on 23-02-2021 17:54:59 at 100819 mi )
Parking Brake
U0122-87 (A8) Lost communication with vehicle dynamics control module - Bus signal/message failure - missing a message
( on 23-02-2021 17:54:57 at 100819 mi )
Steering Angle
U0122-87 (2C) Lost communication with vehicle dynamics control module - Bus signal/message failure - missing a message
( on 23-02-2021 17:55:01 at 100819 mi )
Suspension
U0122-87 (2E) Lost communication with vehicle dynamics control module - Bus signal/message failure - missing a message
( on 23-02-2021 17:54:57 at 100819 mi )
Terrain Response
U0122-87 (2C) Lost communication with vehicle dynamics control module - Bus signal/message failure - missing a message
( on 23-02-2021 17:54:57 at 100819 mi )
Transfer Case
U0122-87 (2C) Lost communication with vehicle dynamics control module - Bus signal/message failure - missing a message
( on 23-02-2021 17:54:56 at 100819 mi )
Some slight good news is that after a hard reset overnight at least the ECU mileages all align on 100819. The issue is my odo is showing 100841!
When I attach the MM to my battery at idle I am showing 0.012vAC. It is a little jittery to begin with around 0.020vAC then finally settles to 0.012vAC.
I've screenshot every single voltage available in the IID menu and it spans 8 photos due to the limitation of only 8 fields per screen. Photos are attached. They are in order of system if that makes sense.
23rd Feb 2021 6:19 pm
gstuart
Member Since: 21 Oct 2016
Location: kent
Posts: 14177
Great , many thks , will just sharpen the pics and have a read through
23rd Feb 2021 6:28 pm
TyphoonDisco
Member Since: 18 Jan 2021
Location: Morpeth
Posts: 102
Is there a way for me to send better resolution?
23rd Feb 2021 6:30 pm
gstuart
Member Since: 21 Oct 2016
Location: kent
Posts: 14177
TyphoonDisco wrote:
Ok, here we go.
Freshly charged battery, kicking out 12.63vDC at the terminals.
Removed Fuses 52 and 58 which both relate to the telephone, this tripped off the nav screen too. The fault still came back. Full codes below.
VIN: SALLAAA139A511904
L319 - Discovery 3 2009
Vehicle scanned on 23-02-2021 17:56
Using IIDTool BT V4.0 B2691
Airbag
U0122-87 (2C) Lost communication with vehicle dynamics control module - Bus signal/message failure - missing a message
( on 23-02-2021 17:54:59 at 100819 mi )
Parking Brake
U0122-87 (A8) Lost communication with vehicle dynamics control module - Bus signal/message failure - missing a message
( on 23-02-2021 17:54:57 at 100819 mi )
Steering Angle
U0122-87 (2C) Lost communication with vehicle dynamics control module - Bus signal/message failure - missing a message
( on 23-02-2021 17:55:01 at 100819 mi )
Suspension
U0122-87 (2E) Lost communication with vehicle dynamics control module - Bus signal/message failure - missing a message
( on 23-02-2021 17:54:57 at 100819 mi )
Terrain Response
U0122-87 (2C) Lost communication with vehicle dynamics control module - Bus signal/message failure - missing a message
( on 23-02-2021 17:54:57 at 100819 mi )
Transfer Case
U0122-87 (2C) Lost communication with vehicle dynamics control module - Bus signal/message failure - missing a message
( on 23-02-2021 17:54:56 at 100819 mi )
Some slight good news is that after a hard reset overnight at least the ECU mileages all align on 100819. The issue is my odo is showing 100841!
When I attach the MM to my battery at idle I am showing 0.012vAC. It is a little jittery to begin with around 0.020vAC then finally settles to 0.012vAC.
I've screenshot every single voltage available in the IID menu and it spans 8 photos due to the limitation of only 8 fields per screen. Photos are attached. They are in order of system if that makes sense.
Click image to enlarge
Click image to enlarge
Click image to enlarge
Click image to enlarge
Click image to enlarge
Click image to enlarge
Click image to enlarge
Click image to enlarge
Click image to enlarge
Click image to enlarge
23rd Feb 2021 6:30 pm
gstuart
Member Since: 21 Oct 2016
Location: kent
Posts: 14177
TyphoonDisco wrote:
Is there a way for me to send better resolution?
No probs , just done it so there a bit clearer
Also checking the AC test , if i remember rightly it should be below 0.5 but I know I’m guilty sometimes of confusing the point of the decimal point so wished to double check before hand, apologises for that
Hopefully someone else can double check that for me please
Will in the mean time find out the info regarding that , basically if it’s high is means the diode in the alternator is messed up, but don’t want to send u down a rabbit hole before checking my facts before hand
Then can check the other screenshots u kindly provided , also another thought, yeh i know , lol, wonder if it would be worth doing those again after clearing everything on the iid , then running the disco until the error comes up and then see how they compare as a before and after ,
Then if where very lucky it may show up an error in the sense of supply voltage to the one module that messing up
Hopefully u don’t throw something at me ,
Last edited by gstuart on 23rd Feb 2021 7:03 pm. Edited 1 time in total
23rd Feb 2021 6:38 pm
gstuart
Member Since: 21 Oct 2016
Location: kent
Posts: 14177
Wonder why the main engine control module is showing NA plus the other one saying 5Vdc but is low
Pretty sure the main control module, ie the one that sits behind the battery reqs a good 5Vdc live and good earth
Will double check that as well unless someone would be so kind to to have a look to verify that pretty plse
In the mean time will find the main control modules wiring , inc the DC to DC convertor showing 67. Volts the pedal voltages full PID ???
I’m wondering if the alternators diode is bad but would really like if someone would be so kind to confirm that for me plse as I would hate to say something wrong without having it confirmed ,
Many thks
23rd Feb 2021 6:43 pm
TyphoonDisco
Member Since: 18 Jan 2021
Location: Morpeth
Posts: 102
Hi Gary,
I think a few of the N/As are because a particular system offers the option to view the voltage but it isn't actually supported, but I might be wrong.
I don't think I've made the pictures as clear as they could be so I am going to rerun them this afternoon split by individual system to make it clearer what we are looking at. There will be a few more photos but hopefully it will make sense.
I did wonder about the Voltage Output from DC/DC Converter at 67.4v! It looks awfully high but I'm not sure exactly what that is and if it's supposed to be that way.
24th Feb 2021 10:21 am
TyphoonDisco
Member Since: 18 Jan 2021
Location: Morpeth
Posts: 102
Hi Gary,
Apologies for the lack of comms, I'd been called away with work and have just got home. I will run those voltages by each system tomorrow as soon as I get a chance and post the results.
All the best,
Jamie
25th Feb 2021 9:51 pm
gstuart
Member Since: 21 Oct 2016
Location: kent
Posts: 14177
Hi
Please no need and of course understand life gets in the way, hope all is well
Have also been racking my brains and haven’t been able to find out any more info ref the dc to dc along with the multimeter read out
Will be interesting to see if the test throws anything up before and after the fault to try and pin it down
See the alternators set point is 16.2Vdc so that’s also useful to know for future reference
Stay safe
26th Feb 2021 12:03 pm
gstuart
Member Since: 21 Oct 2016
Location: kent
Posts: 14177
Was also wondering would one of the more experinaced members be so kind plse to have a quick look through them to see if anything stands out
Ref the multimeter readings and this DC to Dc readout plse
Many thks
26th Feb 2021 12:09 pm
TyphoonDisco
Member Since: 18 Jan 2021
Location: Morpeth
Posts: 102
Gary,
I've now read every voltage and this time split it down by system which can be seen at the top of each photograph.
26th Feb 2021 7:31 pm
TyphoonDisco
Member Since: 18 Jan 2021
Location: Morpeth
Posts: 102
Latest progress.
Fitted a brand new transfer case module, calibrated both parts of the transmission, no faults showing, left engine running....
...fault returned.
I'm at a total loss now. I took voltage readings again post-fault and here are the results.
I think it's time I handed over the car to an auto-electrician. Any willing volunteers or recommendations?
27th Feb 2021 12:27 pm
PROFSR G
Member Since: 06 Mar 2017
Location: Lost
Posts: 5075
Have a look at the large block terminal connector on the chassis rail behind the nsr wheel.
It's a common area for damage as the cables entering/exiting can become cracked/chaffed/broken. Don't separate it unless you think it necessary, otherwise you will have to recalibrate the suspension height. (though this shouldn't pose any issue since you have a GAP IID)
Pull back the outer sheath if necessary and follow each cable carefully to satisfy yourself there's no exposed copper (green) or other damage. yµ (idµ - eAµ) ψ=mψ
27th Feb 2021 1:00 pm
gstuart
Member Since: 21 Oct 2016
Location: kent
Posts: 14177
[quote="TyphoonDisco"]Latest progress.
Fitted a brand new transfer case module, calibrated both parts of the transmission, no faults showing, left engine running....
...fault returned.
I'm at a total loss now. I took voltage readings again post-fault and here are the results.
I think it's time I handed over the car to an auto-electrician. Any willing volunteers or recommendations?
Hiya
Many thks for the other bits , sorry I haven’t come back as quick, been searching for ages ref this dc dc data , also been going through endless hours trying to find more information in workshop manuals , alas nothing has come up yet
See @prof G has replied and indeed also extremely knowledgeable with regards to these discos
27th Feb 2021 11:05 pm
gstuart
Member Since: 21 Oct 2016
Location: kent
Posts: 14177
PROFSR G wrote:
Have a look at the large block terminal connector on the chassis rail behind the nsr wheel.
It's a common area for damage as the cables entering/exiting can become cracked/chaffed/broken. Don't separate it unless you think it necessary, otherwise you will have to recalibrate the suspension height. (though this shouldn't pose any issue since you have a GAP IID)
Pull back the outer sheath if necessary and follow each cable carefully to satisfy yourself there's no exposed copper (green) or other damage.
Hello mate
Wondered that ref that connector , indeed believe the op has also checked that
Am still curious about the 64Vdc on this Dc to Dc data , I assumed it was only fitted in the D4’s, also the readings from the pedal switch
Feels like a bad earth somewhere or possibly a duff alternator , would u be so kind to have a look at the multimeter picture plse, regarding the AC diode test , read that’s it’s suppose to be under 0.5 Acv but always get confused with regards to the decimal point
Have also looked through all my old iid screenshots to try and use them as a comparison but alas haven’t found anything as of yet
Thks so much for looking as I know ur extremely knowledgeable
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