Pneumatic Suspension

Hi. Discovery Td5 2001 reg. Done some chassis welding, battery disconnected,had to remove air bags and sensors... didn't touched sensor's brackets so for sure they are in right position. Refit everything back, battery connected and since then RHS rear is much higher than LHS... still going up and down, no error lights... Bought and fitted 2 new sensors but no change...Before everything was nice leveled. Just been for the diagnostic, guy said that can not access suspension control module and showing problem with ground... all other modules can be read ok. He said, that this module could break during the welding even that battery was disconnected... I heard to buy and try another suspension control module....Before I start buying more stuff can someone give me some advise about it,is it possible what He is saying?
Cheers
Martin

Personally I would look for a second opinion and see if someone has a nanocom locally, see if that can read the system.

Was it a LR specialist ?

Cheers

neilly said:

Personally I would look for a second opinion and see if someone has a nanocom locally, see if that can read the system.

Was it a LR specialist ?

Cheers

Click to expand...

nope, that was a guy advertising himself for diagnostic and suspension calibration for Land Rover and Range Rover.... found his details on Youtube when i was searching for solution

A silly one, but did you refit the sensors on the same side you took them off? Have you checked the physical measurement from ctr of wheel to the bottom edge of the wing? should be approx 473mm +- 15mm.

Maybe the Guy is right, but I would still see if I could find someone with a nanocom or hawkeye and try to read the settings on one of them.

Cheers

neilly said:

A silly one, but did you refit the sensors on the same side you took them off? Have you checked the physical measurement from ctr of wheel to the bottom edge of the wing? should be approx 473mm +- 15mm.

Maybe the Guy is right, but I would still see if I could find someone with a nanocom or hawkeye and try to read the settings on one of them.

Cheers

Click to expand...

Hi. I bought and changed both sensors... left side looks close to correct height but right one its like in lift mode

neilly said:

A silly one, but did you refit the sensors on the same side you took them off? Have you checked the physical measurement from ctr of wheel to the bottom edge of the wing? should be approx 473mm +- 15mm.

Maybe the Guy is right, but I would still see if I could find someone with a nanocom or hawkeye and try to read the settings on one of them.

Cheers

Click to expand...

Yes, i re-fit them on same side as I didn't even disconnect the wiring, only took them only from the bracket and moved gently to the side

neilly said:

A silly one, but did you refit the sensors on the same side you took them off? Have you checked the physical measurement from ctr of wheel to the bottom edge of the wing? should be approx 473mm +- 15mm.

Maybe the Guy is right, but I would still see if I could find someone with a nanocom or hawkeye and try to read the settings on one of them.

Cheers

Click to expand...

Neilly....RHS height is 530 mm and LHS is 460 mm at the moment

Anyone not far away from Heathrow with nanocom or hawkeye?

Have you checked to see if you have a broken spring? Some times not easy to spot. Usually right at the bottom.

Nig43 said:

Have you checked to see if you have a broken spring? Some times not easy to spot. Usually right at the bottom.

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Hi. I have a pnematic suspension

Iv got a Hawkeye sitting here set up for d2 if that helps

PNEUMATIC on the front of a D2? That's a new one on me !

Nig43 said:

PNEUMATIC on the front of a D2? That's a new one on me !

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Yes, a broken spring on the front can on some vehicles cause the back end to sit at odd levels, but the OP is having difficulties with a Disco 2's rear suspension. Even if it were a broken spring on the front, the way that the rear windy springs work the back end would automatically re-level itself. The ride height sensors monitor the distance between the rear axle and the chassis and therefore the body of the vehicle.
In this case, I would say at the very least the rear end needs recalibrating and in the absolute worst case the SLABS ECU has gone tits-up due to electrical problems created by the electric welding arc, but in my view while that's possible it's extremely unlikely.

brian47 said:

Yes, a broken spring on the front can on some vehicles cause the back end to sit at odd levels, but the OP is having difficulties with a Disco 2's rear suspension. Even if it were a broken spring on the front, the way that the rear windy springs work the back end would automatically re-level itself. The ride height sensors monitor the distance between the rear axle and the chassis and therefore the body of the vehicle.
In this case, I would say at the very least the rear end needs recalibrating and in the absolute worst case the SLABS ECU has gone tits-up due to electrical problems created by the electric welding arc, but in my view while that's possible it's extremely unlikely.

Click to expand...

Do You know where I can find a suspension module location in my disco? I can have another one to swap and check but I do not know where to find it...

If you mean where is the SLABS module located, you'll find it up behind the passenger's glove box. Be warned there are a number of modules located there and consequently it's a bit of a "viper's nest" of wiring:-



If however you mean where can you buy a replacement module, I'd be tempted to go for a second hand unit from a reputable salvage company. I've not used them, but "Gentlemen of salvage" seems to have a reasonable web presence.

brian47 said:

If you mean where is the SLABS module located, you'll find it up behind the passenger's glove box. Be warned there are a number of modules located there and consequently it's a bit of a "viper's nest" of wiring:-

View attachment 146022

If however you mean where can you buy a replacement module, I'd be tempted to go for a second hand unit from a reputable salvage company. I've not used them, but "Gentlemen of salvage" seems to have a reasonable web presence.

Click to expand...

What about this one?

The ECU you have in your picture isn't the SLABS, it's the ACE ECU. They are both in the same location, behind the glove box and they are both mounted on the same mounting plate, one either side.

brian47 said:

The ECU you have in your picture isn't the SLABS, it's the ACE ECU. They are both in the same location, behind the glove box and they are both mounted on the same mounting plate, one either side.

Click to expand...

So its not the one which is responsible for self leveling? Only SLABS then?

martinni282 said:

So its not the one which is responsible for self leveling? Only SLABS then?

Click to expand...

That's right, SLABS is a combined ECU which controls both the Self Levelling and the Anti-lock Braking System.
The ACE ECU controls the Active Cornering Enhancement system.

SO we plugged.this.into the hawkeye today i can adjust either side and set the height but it goes out of range every time its turned off and on the.front near side does look very low suspect broken front spring causing the issue