Disco 3 (LR3) Air suspension issues have Gap iid.

I'm new to the Landrover world, with a 2007 LR3 2.7D.
When purchased, it had a fault with a rear suspension sensor, which was replaced.
I purchased the IID gap BT device and calibrated the suspension, 466 mm front and 485 mm rear. Each wheel lifted and fell no problem when calibrating.

The faults are gone and all seemed fine until I moved the suspension switch. When I push it forward, the dash reads "off road" mode for a second, the vehicle rises and then goes into "extended" mode.
When I push it rearwards, the dash reads normal suspension mode, vehicle starts to lower, then rises back up and says extended mode again. Keeps doing this everytime I try to select "normal" mode.

The solution of sorts is take it for a drive. The dash then shows suspension fault, 30 mph etc etc.
I stop the vehicle and restart the engine and the suspension fault goes away and the suspension switch indicator stays in the middle and it drives away with no more faults until the suspension switch is operated again.

Had another go later in the day, recalibrated again, locked the vehicle and took away the keys. When I returned after a couple of hours, the vehicle had risen.

Any ideas for a Landrover novice and a Gap iid novice.
Thanks

Hi and welcome

Have u just bought the D3

May i ask the following plse

1) Any fault codes

2) What height setting did u calibrate ur suspension in

3) With the disco locked when u press the 3rd button what does it activate

4) Also what model do u have plse , does it have the screen on the dashboard

5) Are ur carpets wet on either side

6) check ur suspension relays pins, any signs of green or dirty terminals , also where it plugs into the engines fuse box

Got a good idea but just need to rule a few items out first

Many thks

Ps, have u had ur belts and oil pump cover all done yet

gstuart said:

Hi and welcome

Have u just bought the D3

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Yes m8,

gstuart said:

) Any fault codes

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No, was a fault for a rear sensor, which was replaced.

gstuart said:

) What height setting did u calibrate ur suspension in

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466mm front and 485 mm rear.

gstuart said:

) With the disco locked when u press the 3rd button what does it activate

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Opens the back tailgate.

gstuart said:

) Also what model do u have plse , does it have the screen on the dashboard

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Landrover Discovery 3 V6 2.7D, has the small green lcd screen.

gstuart said:

) Are ur carpets wet on either side

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No

gstuart said:

) check ur suspension relays pins, any signs of green or dirty terminals , also where it plugs into the engines fuse box

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Will do

gstuart said:

Got a good idea but just need to rule a few items out first

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Hope so, because I haven't.

gstuart said:

have u had ur belts and oil pump cover all done yet

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According to the manual the timing belt and water pump was replaced 3 years ago, but it has only done about 25,000 km since.

Regardless of what suspension settings, you attempt to select, either off road or access, the dash shows the correct selection for a few seconds, then shows "extended mode"
When I went out to it this morning, the vehicle was well risen on all corners.I tried the switch in each direction and it went to extended mode and when I looked the rears were high and the fronts were low.

Hi @Zimmerin

Thks for the replies , I had to virtually rebuild my suspension and will help all I can

First thing if I may please, double check about the oil pump cover, from 2007 they had issues of breaking

Right now onto ur suspension, have enclosed some links for u about the system

If u don’t mind doing the following please so we can start ruling things out , along with saving u some pennies in not messing around going to a garage

1) Plug ur iid in , see what fault codes , if any come up, send the codes to ur email/ screenshot or write them down

clear codes and rescan plse , see if any codes come back up , have the engine running and press the height lever

Then after

2) in the engine bays fuse box, remove the Suspension R7 relay and put it to one side , fit relay R9 which is the heated windscreen relay in its place , see if it makes any difference when pressing the height lever or still messes around , don’t worry if it does , need to rule things out step by step

lock and alarm disco , leave overnight and see if raises on it own

some links below for u , also wish to add there a few of us here with d3 and will always help

Hope that helps to get ur started

Gary

https://blackbox-solutions.com/help/SM129.html

https://www.disco3.co.uk/gallery/albums/userpics/11480/description___operation.pdf

http://media.disco3.co.uk/gallery/albums/userpics/15405/Land Rover factory D3 air suspension description.pdf

Enclosed a pic of the relays to make life easier

Cheers m8.
I am an electrician by trade, whether that's going to help or not.

There are no suspension faults at all coming up on the gap iid. Regardless of the suspension mode, gap iid reports nothing. I tried that every which way yesterday. Nada

These are the faults it does report:

Audio System

• B1A56-14 (2F) Antenna circuit - General electrical failure - circuit short to ground or open
  ( on 16-08-2019 16:31:29 at 212936 km )
• B1D21-13 (2F) Remote control switch - General electrical failure - circuit open
  ( on 16-08-2019 16:31:29 at 212936 km )

Engine TDV6

• P0184-27 (2E) Fuel temperature sensor A circuit intermittent - General signal failure - signal rate of change is above the threshold

Parking Aid

• B1B48-96 (2F) Rear left outer sensor - Component failure - internal failure

Ventilation

• B1B78-84 (2F) System pressure - Bus signal/message failure - signal is below allowable range
  ( on 16-08-2019 16:30:15 at 212936 km )

I had already started my version of fault finding today and that was to calibrate the suspension again, i.e everything at the correct level. Then I took out fuse P26E, which I believe disables the air suspension, so will check in the morning and see if any of the bags are down.

Yesterday, for sure when I calibrated the suspension and locked the vehicle, the vehicle had risen overnight.

Hiya

Indeed that will help

I think u may have calibrated it in access height , only reason I say that is where u say u calibrated the suspension then locked it, locking it is in access mode

Not trying to be disrespectful to u in any way and hope it doesn’t come across like that

U have 3 x heights , access , normal and off road height , extended and super extended come into force if it think it’s grounded

So u start the disco, looking at ur instrument panel , do u have any suspension symbols in the small lcd

Have u got a 4x4 screen that shows ur wheels and suspension

Just trying to ensure u haven’t set it whilst in access mode that’s all, if u 100% haven’t then have to dig deeper into the electronics

Ref the suspension rising , what could be happening is every 6 x hours it self levels, if it’s set too low it may thinks it’s grounded and therefore raises it self automatically

To test for leaks it needs to be in normal height , so u can measure front and back , then u pull fuse F26 and leave over night , then re measure in the morning to see if it’s dropped

Didn’t realise ur reporting that u have a leak

Please let us know how u get on

No worries about disrespectful, you are not, you are trying to help me and it's appreciated greatly.

Sorry m8, I locked the vehicle not the suspension.

The calibration should be fine.

Only have the small lcd screen, no pictures.

I'm not reporting a leak, I'm just attempting to eliminate anything of any description because the system seems possessed by demons.

I was under the impression rightly or wrongly that the Discovery self levels by releasing air, rather than adding it when the vehicle is off.

When I go to the vehicle, there is no fault on the dash, no suspension symbols and it stays that way unless I touch the suspension switch, then all hell breaks loose.

Operating the switch in any direction at any time gets me "extended mode" with the compressor ON and getting up to 80 to 90 deg according to Gap iid. Selecting normal, results in the vehicle briefly dropping then rising and returning back to "extended mode" display.

The only way out of this, is to drive it. THEN I attempt while driving to access normal mode, this gives me the suspension amber warning, next I get the red light warning, 30 mph etc. Then I stop, switch off ignition, start up the vehicle again and all warnings gone, BUT the actual suspension level is usually high.

Zimmerin said:

No worries about disrespectful, you are not, you are trying to help me and it's appreciated greatly.

Sorry m8, I locked the vehicle not the suspension.

The calibration should be fine.

Only have the small lcd screen, no pictures.

I'm not reporting a leak, I'm just attempting to eliminate anything of any description because the system seems possessed by demons.

I was under the impression rightly or wrongly that the Discovery self levels by releasing air, rather than adding it when the vehicle is off.

When I go to the vehicle, there is no fault on the dash, no suspension symbols and it stays that way unless I touch the suspension switch, then all hell breaks loose.

Operating the switch in any direction at any time gets me "extended mode" with the compressor ON and getting up to 80 to 90 deg according to Gap iid. Selecting normal, results in the vehicle briefly dropping then rising and returning back to "extended mode" display.

The only way out of this, is to drive it. THEN I attempt while driving to access normal mode, this gives me the suspension amber warning, next I get the red light warning, 30 mph etc. Then I stop, switch off ignition, start up the vehicle again and all warnings gone, BUT the actual suspension level is usually high.

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Thks, would never want my replies to come across like that , forgive me if some questions are repeated , there is a reason in my madness, lol

So assume it was like this all hell breaking loose when u bought it , any warranty on this vehicle plse

no screen in the middle of the dashboard then ,

Ah i see, right , it really sounds like height sensors here of suspension ecu is at fault

I wonder if they fitted the right one at the back

As the disco is high, will be handy to have a look at the height sensors

Check the wiring plse and where they’ve fitted the new height sensor see if u can get the part number from it please, should be stamped in the side

Need to ensure the arms are all connected to the height sensors, wiring isn’t chaffed , don’t unplug them with the battery connected

You’ve also got a sunroof haven’t u , reason I ask is there’s many reports of them leaking or occasionally left open and water drips onto the centre suspension module , causing all green inside , which regs rhe panel to carefully be removed and checked

But think it will be best to visually check the height sensors first

Convinced by the sound of ur description and the 30mph limit ur stuck in off road height ,

Indeed when self level, should lower not raise

Shame ur not closer as I would have helped u with it foc and got it sorted out

Can u try somethings for me plse

1) See if u can get the number from the new height sensor please and is it rear near or offside

2) With the iid , vent the entire suspension system to see if it will drop to access , without touching the height lever , see what it does with the engine running for a few minutes

3) Any symbols on the instrument panel

4) With the engine still running push the lever forward once to normal height , what does it do please

5) When u done the suspension calibration are u setting the measurements of 465 fronts and 485 for the rears on the screen or with a tape measure on the wheels please

6) Have u done any any iid screen shots please of ur suspension

7) when u turn the engine off or the compressor stops running do u hear a hiss , as in air being released for s few seconds

8) swap that relay over with the heated screen to see if it makes any difference , cheers

If we need to go a lot more in depth with the iid , don’t worry can talk u through it

Many thks

Is everything checks out , will be having to check the centre switch next

Because this can happen

https://www.disco3.co.uk/forum/broken-suspension-switch-fixed-way-98985.html?highlight=Lever

Also another great forum for information if u hadn’t seen it already, every fault or scenario has even covered , free to register, because at the end of the day the more people seeing ur fault the better , in order to get it resolved as ur get multiple questions and answers

So wouldn’t hurt by putting a thread on there also to cover as many bases as we can

gstuart said:

So assume it was like this all hell breaking loose when u bought it , any warranty on this vehicle please

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No warranty, given or implied.

gstuart said:

no screen in the middle of the dashboard then

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Nope.

gstuart said:

I wonder if they fitted the right one at the back

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No need to go under it, it's the rear passenger side, part number LR020159, I still have the box in my hand.

gstuart said:

Need to ensure the arms are all connected to the height sensors, wiring isn’t chaffed , don’t unplug them with the battery connected.

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Seems OK from a quick visual.

gstuart said:

You’ve also got a sunroof haven’t u , reason I ask is there’s many reports of them leaking or occasionally left open and water drips onto the centre suspension module , causing all green inside , which regs rhe panel to carefully be removed and checked

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No sunroof.

gstuart said:

5) When u done the suspension calibration are u setting the measurements of 465 fronts and 485 for the rears on the screen or with a tape measure on the wheels please

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Absolutely, with the tape from centre of hub, to underside of arch. 466mm front, 485 mm rear.

gstuart said:

when u turn the engine off or the compressor stops running do u hear a hiss , as in air being released for s few seconds

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Didn't hear anything.

gstuart said:

swap that relay over with the heated screen to see if it makes any difference

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No difference.


I calibrated the suspension yesterday, removed fuse 26 and this morning 3 of the 4 suspensions had fallen by between 10mm and 25mm (not good eh).

Today, I played around with the switch etc etc until I eventually got "normal mode", or what it deems as normal i.e just the little line lit on the suspension switch. I then checked for faults - none, no symbols on the dash . To be certain cleared all faults with iid
Performed yet another calibration, all exactly with the measuring tape. When the calibration was complete iid said to push eas to enable and started counting down from 6 or so. I ignored this but I went into menu on iid which re enables eas, and did that.
Switched off ignition. Started engine again, all fine, no errors, suspension switch with just line lit all OK.
Pushed suspension switch once downward, it said access mode, immediately said "extended mode" and started lifting the vehicle.
Brought it for a spin, got the usual warnings, stopped, started and kept f***in about with the switch until it returned to normal on the switch. When I got back, I checked with the tape and the two front ones were correct and the two rear ones were risen to about 505mm.



I would have expected if there was a wiring issue on the ride sensors, that either the landrover dash or the iid tool would notice something wrong and tell me.
The fact that the suspension switch gets the correct response on the dash, depending on the direction it's pushed, suggests to me that the switch is operating correctly.
Leaks or no leaks, the bags do move up and down fine during calibration.
The relay swap with the other relay has no effect.

So in a nutshell, I dunno

Zimmerin said:

No warranty, given or implied.



Nope.



No need to go under it, it's the rear passenger side, part number LR020159, I still have the box in my hand.




Seems OK from a quick visual.



No sunroof.



Absolutely, with the tape from centre of hub, to underside of arch. 466mm front, 485 mm rear.



Didn't hear anything.



No difference.


I calibrated the suspension yesterday, removed fuse 26 and this morning 3 of the 4 suspensions had fallen by between 10mm and 25mm (not good eh).

Today, I played around with the switch etc etc until I eventually got "normal mode", or what it deems as normal i.e just the little line lit on the suspension switch. I then checked for faults - none, no symbols on the dash . To be certain cleared all faults with iid
Performed yet another calibration, all exactly with the measuring tape. When the calibration was complete iid said to push eas to enable and started counting down from 6 or so. I ignored this but I went into menu on iid which re enables eas, and did that.
Switched off ignition. Started engine again, all fine, no errors, suspension switch with just line lit all OK.
Pushed suspension switch once downward, it said access mode, immediately said "extended mode" and started lifting the vehicle.
Brought it for a spin, got the usual warnings, stopped, started and kept f***in about with the switch until it returned to normal on the switch. When I got back, I checked with the tape and the two front ones were correct and the two rear ones were risen to about 505mm.



I would have expected if there was a wiring issue on the ride sensors, that either the landrover dash or the iid tool would notice something wrong and tell me.
The fact that the suspension switch gets the correct response on the dash, depending on the direction it's pushed, suggests to me that the switch is operating correctly.
Leaks or no leaks, the bags do move up and down fine during calibration.
The relay swap with the other relay has no effect.

So in a nutshell, I dunno

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Hiya

Definitely not a straight forward fault that’s for sure

Maybe a drink has been spilt over the switch , little things with these systems can cause havoc

If all the height sensors are ok and they keep changing the answer maybe a fault suspension ecu , might have a bad contact, or water through the A pillars

put a post over on the D3 forum plse as someone may see something that’s been missed

As at the end if the day need to get urs up and running to save u pulling ur hair out , lol

Plse let us know how u get on , I’m also on the D3 forum so will keep an eye out of the progress and if anything shows up I may be able to help with

gstuart said:

Hiya

Definitely not a straight forward fault that’s for sure

Maybe a drink has been spilt over the switch , little things with these systems can cause havoc

If all the height sensors are ok and they keep changing the answer maybe a fault suspension ecu , might have a bad contact, or water through the A pillars

put a post over on the D3 forum plse as someone may see something that’s been missed

As at the end if the day need to get urs up and running to save u pulling ur hair out , lol

Plse let us know how u get on , I’m also on the D3 forum so will keep an eye out of the progress and if anything shows up I may be able to help with

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Hi, Zimmerin

I am having exactly the same issues you describe. Did you find a solution?