CDL conversion on DII-has anybody taken steps to disable the SLABS?

[ptschram]

I'm in the midst of a conversion on a new DII. The owner of the vehicle provided me with info from Rover stating that the SLABS must be disabled so that traction control won't try to take over when the CDL is activated.

The vehicle in question does not have the air bags so I'm somewhat confused by this request/directive.

Anybody have any input? I have contact info for the regional rep, but don't want to bother him.

PT

 

[jsonova99]

Why would it matter if the ETC kicks in with the CDL activated, I thought that was one of the advantages with a D2 and CDL (assuming you don't have lockers).

 

[ptschram]

Why would it matter if the ETC kicks in with the CDL activated, I thought that was one of the advantages with a D2 and CDL (assuming you don't have lockers).

That's part of why I was confused.

 

[jsonova99]

I've never heard this concern mentioned before by anybody else who has posted about performing the conversion. I'm planning on doing it in the next few months once I recover the money I dropped on my winch

 

[ptschram]

I've never heard this concern mentioned before by anybody else who has posted about performing the conversion. I'm planning on doing it in the next few months once I recover the money I dropped on my winch

I'd also been told the wiring for the CDL light would be present and taped to the frame rails, but it wasn't there when we did the last conversion.

 

[Bruno]

What year truck are you working on Paul ?

 

[benlittle]

I'd also been told the wiring for the CDL light would be present and taped to the frame rails, but it wasn't there when we did the last conversion.

I have a 99 Disco II and when I hooked up my CDL the light was already wired.

 

[Mongo]

Hey Paul,
that's doesn't seem right...I don't have a slabs module for my rovercomm, but it shouldn't matter if the cdl engaged or not. All it does is disable the abs modulator, and if memory serves me correct, it's mearly contact closure and that tell the abs to shut off...What year truck?

Frank

 

[andrewv]

You are correct, you don't want to shut off the SLABS.

I've heard that it became totally random as to which trucks got the wiring and in some cases, if the wiring was there, there may be no bulb.

 

[flyfisher11]

Paul,

This is taken from Ashcroft transmissions installation page for CDL.

1) Disconnect the battery. Unscrew the four hex screws in the glove box hinges. Reach round the side of the glove box with each hand and pull the closing mechanism upwards. Slide the glove box out

2) Pull out the 3 push-studs on the black cardboard panel underneath the glovebox, and undo the screw stud at the back. Remove the panel.

3) Near the outer side of the gap behind the glove box, you will see 2 or 3 ECUs, depending on whether you have ACE, I think. The SLABS ECU is the centre of the three, or the outside of the two. It has 5 black connector blocks underneath. Remove the centre block of the five from underneath the ECU.

4) Look for the black & blue wire running to pin 9 of the connector block, which is the central pin on the lower row, i.e. the row furthest from the retaining clips. At this point, make sure you have the right connector, and the right pin!

5) Cut this black & blue wire & tape off the ends. (Give enough space to solder it back together if you find out you have cut the wrong one...) Reconnect the connector. Replace the panel and the glovebox. Reconnect the battery.

Please note :

This is not needed for 2003 on (facelift) models as the ECU has been reprogrammed to take care of NOT disabling traction control/ABS when CDL in engaged, when ignition is switched on.

To test: engage the CDL and start the car up. The CDL light should be lit, but the ABS/TC lights should not be lit up. This is correct - it means that the SLABS ECU is not disabling ABS/TC when you start the car up with the diff lock engaged

We would like to express our thanks to Mr David French of Surrey for providing these informative installation instructions for us

 

[Bruno]

This is not needed for 2003 on (facelift) models as the ECU has been reprogrammed to take care of NOT disabling traction control/ABS when CDL in engaged, when ignition is switched on.

Not applicable to "all" 2003 MY's.

The entire procedure described above only applies if the SLABS ECU 'sees' the CDL being engaged, otherwise it is unecessary.

 

[landrovergeek]

99 dII with cdl added

I'm in the midst of a conversion on a new DII. The owner of the vehicle provided me with info from Rover stating that the SLABS must be disabled so that traction control won't try to take over when the CDL is activated.

The vehicle in question does not have the air bags so I'm somewhat confused by this request/directive.

Anybody have any input? I have contact info for the regional rep, but don't want to bother him.

PT

i added the cdl shifter to my 99 disco II. no issues so far with the traction control. in fact, performance traction has increased.

don't disable slabs....do not think it is necessary.

if you really feel that it is necessary, then follow this procedure:

1. start vehicle
2. engage cdl (ensure that you see the red dash light).
3. shut off the engine while cdl lever is engage and red light is lit
4. restart engine. the system should sense that cdl on engaged and it will disable traction control, abs and hill descent.


to return to normal traction control, abs and hill descent functions, just disengage the cdl lever while the vehicle is running.

the next time that yoou start the vehicle, normal function is restored.

good luck.

 

[craig]

I have a 99 D2 with a CDL linkage and while AMV who sold me the kit said the same thing as landrovergeek my experience tells me otherwise.

1. Start Vehicle
2. Engage CDL
3. Shut off Vehicle while CDL lever is engaged and red light is lit
4. Restart engine, the ETC, ABS, and HDC lights will illuminate solid as a warning, but if you actually spin the tires the ETC will still kick in. It is my understanding that ETC is only disabled if the light is flashing. I haven't experimented with ABS and HDC in this mode yet.

I should add that that the CDL with ETC is a pretty darn good combo. I wouldn't disable the ETC.

 

[ptschram]

What year truck are you working on Paul ?

It's an '03.

The truck was just dropped off and in discussions with the owner, we have decided not to disable the ABS, ETC, e i e i o...

Hopefully, this one will go better, the first T-case was seized!

 

[Mongo]

Paul, when u start the truck with the cdl engaged, it will disable the abs,etc,tc...

frank

 

[ptschram]

Paul, when u start the truck with the cdl engaged, it will disable the abs,etc,tc...

frank

Oh yeah? Magic, right? This truck has none of the CDL wiring harness.

 

[Bruno]

Paul, as i stated in my earlier post, the SLABS ECU has no way of knowing that the CDL is engaged (or not) if you simply add a CDL enabled T-case and the necessary linkage to lock the center diff.

The system will work perfectly as you propose to do the job.

It only gets complicated if you (or your customer) decide that you want the CDL icon light to illuminate when engaged.

 

[Bruno]

Paul, when u start the truck with the cdl engaged, it will disable the abs,etc,tc...

frank

Frank, that was the case with earlier model versions, not 2003.

 

[Mongo]

didn't know that Bruno, I thought they didn't change that in the software until '04...

 

[Flyfish]

CDL on an '03?

Paul,
Does your '03 have a CDL nipple? If not how did you convert?

Thanks.