Member Since: 18 Oct 2020
Location: Midhurst, West Sussex
Posts: 144
PROFSR G wrote:
If you have a GAP IID transfer case recalibration will resolve it but sometimes it takes more than one attempt.
If you don't have an IID it can be done manually, you'll need a decent stretch of quiet road but it can be done in low range if the road isn't very long.
Proceed as follows:
Select low range if it is still available.
Select reverse, and allow the car to reverse until you see that gear selected in the instrument panel.
Repeat this but selecting an additional forward gear each time until you have gone through all 6 forward gears. Make certain each subsequent gear selection is displayed in the instrument panel before moving on to the next. At the end of 6th the lights should extinguish, if not switch off and restart. If it still fails you will have to go through it all again. (I hope I've explained that correctly )
WARNING: Be aware of any vehicle or pedestrian movement while performing this proceedure!!
I tried this today but it didn't reset. Do I need to go into reverse each time, then up through the forward gears?
Reading the live data one wheel speed sensor (OSF) seems to be reading a couple of MPH lower than the others when the DSC cuts in. Would that be enough to cause it? Also, the steering angle seemed to be miles out at one point during the drive but it has now come back to correct readings.
27th Dec 2020 2:40 pm
PROFSR G
Member Since: 06 Mar 2017
Location: Lost
Posts: 4874
To be honest I can't remember as haven't done the manual reset in years since acquiring diagnostics for it. You could try it both ways and see if that helps but the important thing is to fully release the clutch pedal or it will fail.
As for the wheel speed are all your tyres the same and have similar wear pattern? Any deviation will cause issues for sure if it is outside of tolerance. An "odd" tyre can cause this or a tyre with a different rolling circumference.
Cycle the ign at the end of the proceedure!yµ (idµ - eAµ) ψ=mψ
27th Dec 2020 4:07 pm
GDM
Member Since: 18 Oct 2020
Location: Midhurst, West Sussex
Posts: 144
Not having a lot of luck with the reset. I tried again last night but couldn't get R to display when reversing and it was difficult reversing with no reversing lights! I will try tomorrow in daylight and someone mentioned on another post, having to go back as far as 200 yards.
The tyres are all 255/55 x 20" Pirelli Scorpions. The rears are new, o/s/f has about 5mm tread and n/s/f about 6-7mm. My Son did notice, when we took the front wheel off, that there was some play in the n/s track rod end. Need to look at that too.
31st Dec 2020 1:12 am
PROFSR G
Member Since: 06 Mar 2017
Location: Lost
Posts: 4874
Ok well Since you need "R" to begin the process there would be no point continuing without it. It's important that the clutch pedal is fully raised as even the slightest pressure from your foot will impede the results.
What codes are being thrown up now?yµ (idµ - eAµ) ψ=mψ
31st Dec 2020 1:24 am
PROFSR G
Member Since: 06 Mar 2017
Location: Lost
Posts: 4874
Hang on, are you still getting C1A41?
If you are, there is still a fault with the clutch pedal sensor and this needs to be sorted first. If this fault is still present no amount of manual calibration attempts will work as the relevant modules can't see the position of the clutch pedal!!
Have a look at the operation of the sensor in "live values", you should be able to see it move between 0% and 99.9% when you press and release the pedal. If not, there's still an issue with either the plug or the switch itself.yµ (idµ - eAµ) ψ=mψ
31st Dec 2020 2:14 am
GDM
Member Since: 18 Oct 2020
Location: Midhurst, West Sussex
Posts: 144
PROFSR G, I am now getting PO820 Gearshift lever X-Y position sensor circuit and UG126 Lost communication with steering angle sensor module.
Annoyingly the Icarsoft lets me enter a manual gearbox but then only only lists an automatic 'box in the data stream section, so I have no way of checking the clutch sensor.
I take it that the clutch master cylinder is inside the car next to the clutch pedal and that the sensor is there somewhere too.
2nd Jan 2021 1:07 am
PROFSR G
Member Since: 06 Mar 2017
Location: Lost
Posts: 4874
Yes, the clutch pedal sensor is part of the clutch master cyl and is located above the clutch pedal. Check the connection on this as well as the XYZ sensor and the loom to it for damage. It's a pig to get at as it sits on top of the gearbox behind the bell housing. With the undershield off you can just get to it by stretching your hand up along the left side of the box. To be honest though, I think you're going to need better diagnostics to get a clearer picture of what's going on. You need to confirm whether the fault lies with the XYZ switch, clutch pedal sensor, or the wiring loom on the box. l'll have a look for a pic of the xyz sensor and its location for you.yµ (idµ - eAµ) ψ=mψ
2nd Jan 2021 1:37 am
PROFSR G
Member Since: 06 Mar 2017
Location: Lost
Posts: 4874
You can see the XYZ in this pic and where it's located. The elec plug is fed from the left side so you can see it's not easy to access.
It generally is a very reliable sensor but I have known a few to go wrong.
Even so, you must confirm with diagnostics before going after this or it will be a lot of pain for nothing.
If it does turn out to be the XYZ I can provide a easier solution for changing it.
Click image to enlarge
yµ (idµ - eAµ) ψ=mψ
2nd Jan 2021 1:53 am
GDM
Member Since: 18 Oct 2020
Location: Midhurst, West Sussex
Posts: 144
Thank you! Sounds like I need the GAP IID tool now.
2nd Jan 2021 2:04 am
PROFSR G
Member Since: 06 Mar 2017
Location: Lost
Posts: 4874
Drive the car for a few miles then stop and switch off. Repeat this two more times switching off again at the end. Then do a diagnostic sweep and see what codes are present. Forget the "U" codes for the moment just post back the C,P, or B codes. And yes, you do need to upgrade the diagnostics or you'll be chasing your tail by the sounds of things
You should be able to sell the iCarsoft on here easily enough, so you'd at least get something back on that. IId comes up for sale here quite regularly if you can wait, otherwise time to bite the bullet. yµ (idµ - eAµ) ψ=mψ
2nd Jan 2021 2:16 am
GDM
Member Since: 18 Oct 2020
Location: Midhurst, West Sussex
Posts: 144
I have ordered the GAP IID tool from Island 4 x 4, along with 2 x track rod repair kits, as both inner joints seem to have play in them, which could be upsetting the DSC.
3rd Jan 2021 9:39 am
GDM
Member Since: 18 Oct 2020
Location: Midhurst, West Sussex
Posts: 144
I received the IID tool and the track rod kits a couple of days ago. The track rod kits have made no difference to the DSC issue but the steering does now feel more precise.
My Son and I used the IID tool to try and reset the transfer case but as soon as the car was put into gear the yellow warning light came up on the dash again. We checked the live data on the X-Y switch and although we got some voltage readings, we have no idea if they are correct, or not. The IID tool could not recognise which gear the car was in either.
We cleared the codes, then I did a 50-60 mile round trip before we read the codes again and we got the following: -
VIN: SALLAAD178A454613
L319 - Discovery 3 2008
Vehicle scanned on 07-01-2021 18:18
Using IIDTool BT V4.0 B2742
Cell Phone
B1A00-47 (AF) Control module - System internal failure - watchdog/safety failure
( on 07-01-2021 18:16:55 at 267562 km )
U3000-54 (EC) Control module - System programming failure - missing calibration
( on 07-01-2021 07:28:30 at 267466 km )
Instrument Pack
U0132-87 (2E) Lost communication with ride level control module - Bus signal/message failure - missing a message
Parking Brake
U0101-87 (A8) Lost communication with transmission control module - Bus signal/message failure - missing a message
( on 06-01-2021 23:34:57 at 267466 km )
Ventilation
B1B74-00 (28) Front foot-defrost mode stepper actuator
( on 07-01-2021 07:28:35 at 267466 km )
B1B75-00 (28) Front foot-face mode stepper actuator
( on 07-01-2021 07:28:37 at 267466 km )
B1B76-00 (28) Front left air blend stepper actuator
( on 07-01-2021 07:28:38 at 267466 km )
B1B77-00 (28) Front right air blend stepper actuator
( on 07-01-2021 07:28:38 at 267466 km )
B1B78-84 (28) System pressure - Bus signal/message failure - signal is below allowable range
( on 06-01-2021 23:34:00 at 267466 km )
9th Jan 2021 12:59 am
PROFSR G
Member Since: 06 Mar 2017
Location: Lost
Posts: 4874
Ok a little more info to try and build a better picture of what's going on.
Can you have a look in live values and see what's happening with the clutch pedal sensor? It should show you the pedal movement as you depress and release. Beyond that there may be an issue with the wiring at the large terminal block behind the nsr wheel on the chassis rail. Check the clutch sensor live values first and post back result. yµ (idµ - eAµ) ψ=mψ
9th Jan 2021 1:42 am
GDM
Member Since: 18 Oct 2020
Location: Midhurst, West Sussex
Posts: 144
I couldn't find anywhere in the live values to check the clutch pedal sensor. Do you know what section that is in?
i remember reading about the NSR terminal block in another similar post. I will see if I can find it tomorrow.
9th Jan 2021 2:07 am
GDM
Member Since: 18 Oct 2020
Location: Midhurst, West Sussex
Posts: 144
I am still getting the same fault with the handbrake auto release.
Parking Brake
U0101-87 (EB) Lost communication with transmission control module - Bus signal/message failure - missing a message
( on 07-01-2021 18:37:13 at 267562 km )
I did manage to find the live values for the clutch pedal sensor this evening and that is working fine. I have tried recalibrating again but, although the XY sensor is giving readings, it still comes up with 'undefined gear' in every gear. The reversing lights have been coming on briefly when coming out of reverse and back into neutral. I need to take it for a run tomorrow but I doubt it will be any different.
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