Thread: Disengaging Traction Control

Just do what Slunnie did, put a switch in the wire instead of just cutting it
Personally I love TC, it's fantastic on steep, scrabbly hills, slippery grass, sand, etc etc (Irony right here, anyone?)
Cheers
Muppet

Hi MarknDeb,
Thanks so much for your reply.
Yes, I had already heard of this but have learned from another post that although it worked on earlier models it was discontinued with my model.
What a shame. Would have been a simple way to play with it.
I have only recently purchased my D2 and have been to busy setting it up to get out and see what it does so I am looking forward to seeing what it will do. My D1 was my first Landrover and I was more than impressed with it's capabilities with only a few minor mods so I am expecting to be impressed with the D2.
Thanks again,
Cheers, Rick.

Originally Posted by Yorkie

personally i would leave the tc in place and learn to drive with it, after all most new 4x4 come with it.
however i would assume the d2a has thr same wiring under the skin so check out the instructions on the ashcroft site for snipping the wire that controls the tc (blue/grey wire, check 10 times to be sure, then snip). then just put a switch in the line and away you go, switchable tc.

disclamer: i may not know anything and will not be liable for situations you may get into without tc!.

Yorkie,

The blue grey wire connects the diff lock switch on the TC to the SLABS unit. Cutting the wire stops the SLABS ecu detecting that the cdl is locked, and will only stop the ecu selecting correct etc/abs programs for the locked cdl on d2a's (or earlier cars fitted with the later ecu's.). On pre-facelift D2's starting the car with the cdl locked disables TC. The wire cut is one way to prevent the ETC being switched off under these circumstances.

It doesn't disable ETC on any D2.

Cheers
Paul

Originally Posted by Franrick

Hi MarknDeb,
Thanks so much for your reply.
Yes, I had already heard of this but have learned from another post that although it worked on earlier models it was discontinued with my model.
What a shame. Would have been a simple way to play with it.
I have only recently purchased my D2 and have been to busy setting it up to get out and see what it does so I am looking forward to seeing what it will do. My D1 was my first Landrover and I was more than impressed with it's capabilities with only a few minor mods so I am expecting to be impressed with the D2.
Thanks again,
Cheers, Rick.

It wasn't exactly discontinued. On early cars the diff lock lever wasn't fitted and the only reason the factory expected the cdl was going to be locked was if a mechanic forgot to climb under the vehicle to disable after doing a task that required locking the diff. To prevent damage to the transmission the ecu was programmed to disable the etc if the diff was locked at startup.

On the d2a's the diff lock lever was reintroduced, and the ecu reprogrammed so it used programming for the abs/etc/hdc which took into account the locked cdl.

So the d2a's have programming for both locked and unlocked cdl whereas the d2's had programming for unlocked and a error state to protect the transmission.

A switch in the fuse wire is handy to disable the T/C -ABS not because the you want the Traction Control disabled but it can be handy at times to disable the ABS . Especially whilst trying to do a panic stop on loose gravel.

You can pull up faster with the wheels able to be locked up in such a situation, as the dirt can plow up into a barrier in front of the tyres when they are locked up.

Jeep have such a setting built in, here is a quote from the Jeep Australia website, Landrover needs to take notice, I see they also have sway bar disconnects.
Jeep Wrangler Unlimited Off-Road Performance

Off-and on-road brake systems. A four-wheel disc anti-lock brake system (ABS) with a Jeep 4WD off-road calibration system provides more sustained wheel lockup on plowable surfaces like mud, sand, and gravel for improved stopping performance.

.

I love etc in sand (including towing in sand) as well as other areas, but for high speed dirt roads as going bush notes above abs is not the best for braking. Because you lock the cd in that situation forcing traction control and abs off is a great feature of a cdl retrofitted d2 that has not had the wire snip.

Cheers

Isnt there a pommy trailer plug already wired in around the rear pillar somewhere?

I have a sneaking suspicion the D2a abs might be a better in loose gravel than the earlier revisions. I have the MY04 SLABS ECU fitted to my D2 and I keep trying to invoke the horrific behaviour you guys reckon happens on loose surfaces and I'm just not seeing it. The brakes will consistent behave in a controlled manner, or lock up when on loose/slippery surfaces. The only time it's really bad is when you are straddling two surfaces with different degrees of traction - like one wheel on tarmac and the other in loose gravel on the verge.

D2 traction control will absolutely allow you to lock the wheels on loose surfaces.

I've posted elsewhere the WABCO abs off-road braking strategy. It works in 3 stages, above certain point (40-60kphish from memory) brakes will pulse in the normal "evil abs" fashion. However once the road speed drops below that point, the ABS will cyclicly lock and unlock the to allow gravel build up to help slow the vehicle. Once road speed is below 15kph the wheels will fully lock.

This the spiel on the abs from the LR promotion material. The wabco tech docs cover the operation of the all- terrain in more detail.

http://www.parisfranceinc.com/portfo...eel_index.html

The d2 had this system before any other 4x4. Jeep is playing follow the leader.