Disengaging Traction Control

If you are struggling with TC in sand...

You have your tyre pressures set wrong ;)

The ONLY vehicle to clear a real soft beach at Robe once was the D2. All the non TC vehicles (including vehicles with LSDs and Rear Lockers) got stuck badly and couldn't drive the 3mtr jump up to get off the beach.

The D2, with no CDL fitted at the time was the only one that drove clean up the soft sandy ramp. And then towed all the others out.. Including the V8 Disco 1.

There is never a valid reason for disabling TC

I agree. I never had CDL for years. I was always very happy with it on the beach, including heavy towing in deep soft stuff but CDL makes it a weapon when combined with TC. I was tempted to do the SLABS wire cut but might as well do a switch even just for the fun of it.

Cheers

Firstly, I have to admit I know very little about the CDL operation, and its interaction with T.C., however I have purchased a CDL kit , which, when installed , gives me a 2nd lever in the cab, and gives me the option of locking the centre diff in high or low range. With the installation instructions, there is this information;

Centre Diff Lock Operation

" The centre diff lock is operated by pushing the right hand lever [ next to the hi/low lever] forward, when the diff lock light on the dash illuminates , the diff lock is engaged, this lever can be operated either when the vehicle is stationay or in motion, when it is engaged as above the traction control is still functional, if the engine is switched off and restarted while the diff lock is engaged the traction control will no longer operate. When the diff lock is no longer required pull the right hand lever rearward again and when the diff lock light goes out the diff lock has disengaged , please note if the ABS/ traction control has been disabled while in diff lock, the engine will need to be switched off and restarted to enable normal ABS operation .

PLEASE NOTE_ the CDL is never to be operated when driving on a solid surface as drive line wind up will occur and possible damage to the drive line could result. Do not engage the CDL while wheels are spinning."

THe CDL kit was purchased from our local independant LR workshop, and is an imported kit , made in the UK. I can only assume what the instructions say is correct, Bob [ I must add, I have a 1999 D2]

That info is all correct Bob. The trouble with NOT doing the slabs ecu wire cut or something switch which can 'simulate' the wire cut is that say you are going up a steep slippery climb with axle twisting ruts you really need both CDL and traction control but if you stall it or stop the engine You no longer have ETC. Unless you can unlock the CD first which you usually can't easily do on the spot.

Cheers

Quote:

---

Originally Posted by MarknDeb

When i saw this i remembered i had this somewhere, i have never tried it but if it works its what you want.


ToDisable ABS/TC

With the vehicle is running and the diff lock is engaged then the TC and ABS will remain enabled, however if the vehicle is turned off once with the diff lock engaged and then restarted then the computer will disable the TC and ABS (i.e. the TC and ABS dashboard lights will be on).

---

Quote:

---

Originally Posted by OffTrack

Only works on prefacelift D2's.

---

So in summary;

D2 (pre-facelift):

• CDL engaged with engine on, TC/ABS remain active but if in Low Range will have their operating parameters altered.
• CDL engaged, engine shut off, then restarted. TC/ABS will be disabled. To re-enable CDL must be disengaged and re-engaged with engine running (as above).
• If wire cut or switch fitted to wire then this prevents the SLABS ECU detecting CDL engaged state and so keeps TC/ABS active regardless of a change of engine state event.
• To avoid the need to cut the wire, fit a D2a SLABS ECU (see below).

D2a (facelift):

• The revised SLABS ECU will keep TC & ABS active while CDL is engaged regardless of a change of engine state event.
• If the D2a SLABS ECU is fitted to the earlier vehicle then the above applies to the earlier cars.

This is as I understand it from the posts listed in this topic only, regardless of preferences to having it on, off or switchable. If it is incorrect in any way let me know so I can edit the post so a simple accurate list of states is in one list.

Those instructions are not quite right. I have a 50s cdl kit fitted and I haven't cut the wire yet and my information is that the etc only is disabled, the other abs/hdc thingys are not disabled, only reduced in their application.
When I read your instructions it says etc and abs are disabled. This concerned me, so I went and tried the abs part (the etc is not a problem).
My abs still works with the cdl locked. To my knowledge the slabs has not been upgraded to the d2a version either as this was my dads car which he bought new.
What the difference is I can't estimate and I guess you would need some sort of analytical equipment to actually measure the difference.
And yes, the three amigos were along for the ride when I tested the abs. This would support an old slabs unit still in situ.
I haven't tested the hdc but if the abs works I assume the hdc and other items will work as well. This is in line with the other numerous posts on this subject and with offtracks previous post, although there seems to be some difference in the abs part. I don't know? The activation kit type is irellevant as it is only a cable, but my abs did operate in some fashion on the gravel with the amigos present?

I can see a slabs upgrade coming, yes I can cut the wire , but the improved operation programming is desirable as well.


Hope this assists someone here.

Cheers
Kev:)

I have CDL and the SLABS wire cut and spent the Melbourne Cup long weekend in the Victorian High County around Wonnangatta Station. As well as other tracks we patricularly enjoyed scrambling both up and down the Harts Spur track and the the very steep Herne Spur Track and I can count on one hand how many times overall that the TC was activated and not once was forward motion compromised - it actually made me feel more secure as it activated when encountering the loose stuff whilst committed on notably steep ascents.

To quote a few past contributors to this topic:-

Cut the wire and forget it!

CDL plus TC wins

There is never a valid reason for disabling TC.

this is just my tuppence worth on the subject;)

Herne Spur Track is waiting for you :D

onebob