CDL warning sound ?

[blackjack]

I have just spent a week in the Vic High Country in my chipped D2, 2000, auto TD5. I had the CDL coupled before I went and was amazed at the difference it made climbing some of the really steep rough tracks. After 3 days of working without any problems the CDL then began to emit continous warning 'dongs'. Mostly there would be 3 donging sounds but I would also get 2 or 5 with no consistency to the timing of these. The CDL was still working so I had to put up with the continous noise as some of the tracks could not be climbed without CDL engaged. Ant ideas ?

I did notice that Hill Descent worked very nicely as I had thought it a bit of a gimmick before now. It seemed to work much smoother with the CDL not engaged on really steep descents. Reduction gears would be even better though but I have no knowledge of these relating to auto D2s

One other question too - I have 2" dobinson springs and shocks all round with 265/75/16 Mickey Thompson MTZs which performed brilliantly. But the rear sagged very noticably when loaded with the camping gear. What is the best fix - is it possible to go to a 3" lift in the rear and leave the 2" in the front ? or do I need heavier gauge springs and leave it at 2" ? Can I install air bags inside the existing springs ??

I am a 1st time poster after reading this site avidly to learn as much as I can about my Landy. I must say I am stoked with the Disco and blown away at the capability off road. I also have an 07 SR5 hilux which is now relegated to the SWMBO shopping trolley. Cheers

Jack

[jwb]

I am not aware of any CDL related chimes. Especially not in our series cars that never had a CDL as standard. You will get chimes from the HDC system e.g.turning it off or if you push the button in when in high ratio or going faster than 50kph.

Just found this in Rave:

Brake overheat prevention
To prevent the brakes overheating, the SLABS ECU monitors the amount of active braking employed and, from this,
estimates brake temperature. If the SLABS ECU estimates the brake temperature has exceeded a preset limit, it
flashes the HDC fault warning lamp and sounds the audible warning continuously, to indicate that HDC should be
deselected to allow the brakes to cool. If active braking continues and the SLABS ECU estimates that brake
temperature has increased to an unacceptable level, fade out is employed and HDC is disabled...

Learnt something new as well.

[twodoors]

I have just spent a week in the Vic High Country in my chipped D2, 2000, auto TD5. I had the CDL coupled before I went and was amazed at the difference it made climbing some of the really steep rough tracks. After 3 days of working without any problems the CDL then began to emit continous warning 'dongs'. Mostly there would be 3 donging sounds but I would also get 2 or 5 with no consistency to the timing of these. The CDL was still working so I had to put up with the continous noise as some of the tracks could not be climbed without CDL engaged. Ant ideas ?

I did notice that Hill Descent worked very nicely as I had thought it a bit of a gimmick before now. It seemed to work much smoother with the CDL not engaged on really steep descents. Reduction gears would be even better though but I have no knowledge of these relating to auto D2s

One other question too - I have 2" dobinson springs and shocks all round with 265/75/16 Mickey Thompson MTZs which performed brilliantly. But the rear sagged very noticably when loaded with the camping gear. What is the best fix - is it possible to go to a 3" lift in the rear and leave the 2" in the front ? or do I need heavier gauge springs and leave it at 2" ? Can I install air bags inside the existing springs ??

I am a 1st time poster after reading this site avidly to learn as much as I can about my Landy. I must say I am stoked with the Disco and blown away at the capability off road. I also have an 07 SR5 hilux which is now relegated to the SWMBO shopping trolley. Cheers

Jack


How old are the springs and shocks.... what spring rating did you go for... How much kit have been carrying to notice the sag.... Number of occupants, Have you got steel rear bar/long range tanks/cargo drawer system/fridge....Is it only when you are off roading that you have noticed a sagging back end...

Is the ride comfortable... is the sag actually causing issue other than visual... A much firmer spring may hold the back end up but may not give the comfort over 'big terrain'...

is there a big difference in the trucks height when empty compared to full... measure on a flat concrete drive... or similar to gauge difference..

Keep it springs don't go airbag helpers... those who had the later airbags generally come back to springs so keep it simple...

James

PS.. you got some pics for us to see..

[wardy1]

I hate HDC but if it makes your world go 'round use it :)
My D2a chimes 3 times when I engacdl and then again when I disengage it. This I think is normal, just a reminder that it's in or out.
Haven't heard of the problem of continous chiming though sorry.
Very interesting info re the high temp warning.

[robbotd5]

I have had my 04 TD5 manual D2a since new and have never used the HDC. Never needed to, Low range second always low enough. Curious though.
Regards
Robbo

[biggin]

I have had my 04 TD5 manual D2a since new and have never used the HDC. Never needed to, Low range second always low enough. Curious though.
Regards
Robbo

HDC is pretty handy on the Auto V8.:)
I only use it in low 1st though.
The extra compression from the diesel obviously counts for a lot when it comes to engine braking.

[wardy1]

I have had my 04 TD5 manual D2a since new and have never used the HDC. Never needed to, Low range second always low enough. Curious though.
Regards
Robbo
Hmmm... low 2nd ain't gunna do it in an auto though, not without lots of brakes.... not ideal on a wet, steep downhill. I might even get tempted by HDC in that case...... NAH, it lets the car go too fast esp if there is any wheel lifting involved:twisted:

[Baffle]

Hey Jack,
I hsve not heard of the CDL having any warning chimes ( Could do though)
Hill Desent will chime 3 times when activated and 3 eimes when you hit the brake or deactivate.
Your ABS and Traction control inc HDC can / will chime if there are faults. You will get the well known 3 lights on the dash also. These can go away also, but they can re appear and not go away . This pain is nick named " The 3 amigos". Look up "the good oil" on the forum and do a search for all the info.
Soft springs are great for off rd, you can put poly airs in to help with your loaded hight if wanted. All depends on your needs.

You can change your diff ratios and Tc ratio but, I dont think it is a good move with your tyre sizes atm, Plenty of better mods to do before then ;)

[blackjack]

Thanks everyone for the assistance, much appreciated.
The CDL chimes when engaged and again when disengaged but as mentioned it eventually began to chime almost consistently, and it was definitely associated to the CDL, not TC or HDC as it stopped the minute CDL was turned off. HDC chimed too when activated but that was easily recognised as CDL was switched off and only used for downhill. Yes, it is an auto and 1st low was not low enough. Some of the tracks we went on had up to 20 switchbacks and were as steep as anything I have ever seen. We saw motorbike tracks that turned around rather than climb one of the tracks.
I cant see the chimes were a brake overheating issue as it was going uphill and no braking being applied. so I am still a bit lost as to why I had the warning chimes on CDL uphill.
Re the suspension - all shocks and springs are 3 months old. Rear springs selected are mid strength, ie not soft but not stiff either. 2 people in vehicle, fridge, clothes, food etc. 6th wheel on roof rack plus 1 jerry. Most of the heavy items were in my sons hilux. The springs sagged noticably and once unloaded they returned to the 2" lift levels again. Is it possible to run different lifts front to back ? I have not heard of this before but it might help as I bottomed the back end out on a few river entry / exits

[Pedro_The_Swift]

... those who had the later airbags generally come back to springs

James


:Rolling::Rolling:[FishSlap]

[ozscott]

Hill decent does a better job than the operator simply because we cannot brake separate wheels and it can. I find my V8 manual has excellent low range first braking and can carry a very low idle speed without stalling - that helps.

When I slot the vehicle back into high range from low the HDC will chime its head off until you turn it off. Apart from that it will not chime going into locked centre diff.

Cheers

[Urban Panzer]

I hate HDC but if it makes your world go 'round use it :)
My D2a chimes 3 times when I engacdl and then again when I disengage it. This I think is normal, just a reminder that it's in or out.
Haven't heard of the problem of continous chiming though sorry.
Very interesting info re the high temp warning.


MMMMM...............wondering if I can get my 2001 to do that :angel:

Also wondering if its anything to do with the fact the "OPs" D2 is a year 2000, and its been retro fitted and the chime is because "maybe" the SLABS feed has not been cut...........? but thinking about it my friends is like that and his does not chime......mmmmm.....

[foss]

neither does mine...

[blackjack]

Have just talked with British 4x4 autos in Adelaide as they activated the CDL for me. They are a bit confused as to the cause too. I am taking the car in next week to check for fault codes and hopefully find out what may be the culprit. If the answer may assist others I will post it once I know.

Oh, re the suspension, I rang Dobinsons and asked which springs should be in the rear of a D2 to achieve a 2" lift. I have spring product code C51-017 which they sated is not the right spring. They say it should be either a C51 -022 or -027 as per their list on their website which is used by companies/individuals for ordering. It appears that the 4x4 shop that installed mine ordered the incorrect springs so I am talking to them about that. C51-017s are not recommended for a D2 anywhere in their documentation. Once again thanks for the responses to date.
cheers

jack

[Stewie]

Have just talked with British 4x4 autos in Adelaide as they activated the CDL for me. They are a bit confused as to the cause too. I am taking the car in next week to check for fault codes and hopefully find out what may be the culprit. If the answer may assist others I will post it once I know.

jack

Hi Jack,
Just read your post as I have just returned from a weekend 4wding at the Coorong and experienced exactly the same issue that you are describing with your CDL.

I fitted my CDL kit about 5 years ago and have had no issues with it until this weekend. Once engaged I get the CDL light on the dash and an initial chime to let me know it is engaged. Everything is OK but then for no apparent reason I get 1, 2 or more chimes comming from the car. I did notice on one occasion that the CDL dash light looked off but that could have been due to sun reflection as I didn't notice it again.

Before I go messing around with linkages and sensors did you manage to get to the reason for the chiming?

I noticed you spoke with British 4x4, did you get a resolution from them? Also I assume you are in Adelaide (as I am) is that correct?

Hope you managed to get your CDL issue sorted out and can maybe shine some light on why it may be happening.

On another note; are you able to "disable" your traction control by engaging CDL first and then starting the car? I have read about this "technician mode" and heard of other drivers being able to perform it via the correct sequence however I cannot seem to be able to replicate it and wondered if you were able to.

Regards.

Stewie.

[crash]

Hmmm... low 2nd ain't gunna do it in an auto though, not without lots of brakes.... not ideal on a wet, steep downhill. I might even get tempted by HDC in that case...... NAH, it lets the car go too fast esp if there is any wheel lifting involved:twisted:
I find 1st low in the auto too slow sometimes and 2nd is the way to go, and this is on some steep hills aswell. Only use the HDC to give the ABS a work out.
I just got my CDL installed - can not wait to get out and try it.

[crash]

On another note; are you able to "disable" your traction control by engaging CDL first and then starting the car? I have read about this "technician mode" and heard of other drivers being able to perform it via the correct sequence however I cannot seem to be able to replicate it and wondered if you were able to.

Regards.

Stewie.

The shop that fitted my CDL explained to me that if you engage Diff lock THEN start the vehicle you disable the ABS and Traction control. Your dash will have the "3 amigos" appear as well. They said that this was best to do this if you were going to be beach driving or trying to go up a slippery slope where you wanted to maintain momentum, as traction control works against you in these circumstances.

[OffTrack]

I fitted my CDL kit about 5 years ago and have had no issues with it until this weekend. Once engaged I get the CDL light on the dash and an initial chime to let me know it is engaged. Everything is OK but then for no apparent reason I get 1, 2 or more chimes comming from the car. I did notice on one occasion that the CDL dash light looked off but that could have been due to sun reflection as I didn't notice it again.

As far as I'm aware you'll only get the chimes when you engage the CDL if you have a SRD000150 or SRD000070 SLABS ECU fitted. These were originally fitted to MY03 and MY04 D2's respectively. The SRD500070 ECU may have been fitted to earlier D2's as a fix for ABS Sensor related faults resulting in the Three Amigos.

If you wait for the dash warning lights to go out, then start the car, you'll hear three warning chimes if one of the later ECU's is fitted. This indicates that an ABS self test has successfully completed and doesn't occur with the original D2 ECU's.

If this is the case it will explain why you don't get the "technician mode". This is only applies to the SLABS ECU's fitted to pre-facelift D2's, and is actually a reduced performance mode which disables ETC and degrades ABS, EBD and HDC performance. Locking the CDL with the later ECU's enables revised parameters for ETC, ABS, EBD, and HDC to suit the locked differential.