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carmellajade
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Joined: 08 Jan 2009
Posts: 41
Location: Surrey
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 Posted: Sat Jan 24, 2009 21:22 Post subject: Active Height suspension |
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Hi all
We seem to be experiencing problems with the Active height suspension on our 1999 4.2 VX. When stationary you can select either H or L from neutral and the car adjusts promptly. If you move away and start driving, the suspension automatically reverts back to Neutral. The suspension will stay on whatever you choose whilst stationary without changing and if you crawl along below 5mph, it stays but anything over this it changes back to N.
Any ideas?? |
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| Posted: Sat Jan 24, 2009 21:22 Post subject: Google Ads keep this community free to join! |
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joinerman
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Joined: 11 Sep 2005
Posts: 2200
Location: Here & there
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| Posted: Sat Jan 24, 2009 21:49 Post subject: |
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| There's lots on here about the subject just do a search & look through the FAQ's |
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carmellajade
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Joined: 08 Jan 2009
Posts: 41
Location: Surrey
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| Posted: Sat Jan 24, 2009 22:38 Post subject: |
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I think I must be doing something wrong.. as the only topic coming up when I search is my own post and lots of other messages that are not related to my enquiry seach!!
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joinerman
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Joined: 11 Sep 2005
Posts: 2200
Location: Here & there
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| Posted: Sat Jan 24, 2009 23:03 Post subject: |
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| Well i just typed in Active suspension & bingo |
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Nor
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Joined: 16 Feb 2006
Posts: 330
Location: Oslo, Norway
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| Posted: Sun Jan 25, 2009 0:40 Post subject: Re: Active Height suspension |
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| carmellajade wrote: |
We seem to be experiencing problems with the Active height suspension on our 1999 4.2 VX. When stationary you can select either H or L from neutral and the car adjusts promptly. If you move away and start driving, the suspension automatically reverts back to Neutral. The suspension will stay on whatever you choose whilst stationary without changing and if you crawl along below 5mph, it stays but anything over this it changes back to N.
Any ideas?? |
Your car is behaving as it was designed to do.
L is only for making it easier to get in and out of.
H is only for low speed. In low range it will not drop down from H.
Do you have the User's Manual?
_________________
2004 HDJ100 AHC Auto 160'km, ex 2000 HDJ100, ex 1997 HZJ80GX Africa edition. |
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carmellajade
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Joined: 08 Jan 2009
Posts: 41
Location: Surrey
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| Posted: Sun Jan 25, 2009 10:01 Post subject: |
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| yes I have the owners manual but tbh, it does only state that you can only "select" L or H under 19mph which we took to be mean, that once it has been selected, you are able to drive over the 19mph but obviously not! |
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hodgy0_2
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Joined: 16 Nov 2006
Posts: 256
Location: Cambridge
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| Posted: Sun Jan 25, 2009 11:36 Post subject: |
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i have to say I agree with Nor
your description seems a pretty good one of normal operation to me
in fact much better than the manual  |
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wildsmith
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Joined: 20 Oct 2006
Posts: 1580
Location: Stourbridge, West Mids, UK
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| Posted: Sun Jan 25, 2009 14:12 Post subject: |
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| carmellajade wrote: |
| yes I have the owners manual but tbh, it does only state that you can only "select" L or H under 19mph which we took to be mean, that once it has been selected, you are able to drive over the 19mph but obviously not! |
You can buy an electronic suspension lock from Slee that allows you to set the suspension height as normal and then throw a switch to hold it there regardless of speed. I have one but have not got round to fitting it yet.
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Jon m0zxj
01 UZJ100 lifted (AHC & 40mm BL), ARB locked f&r, cryo'd 4.88's, TJM front bumper, 12k goldfish, sliders, rack, snorkel, 35's, storage, aux power etc.
93 HDJ80 sold
94 HDJ80 RIP |
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hodgy0_2
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Joined: 16 Nov 2006
Posts: 256
Location: Cambridge
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| Posted: Sun Jan 25, 2009 16:19 Post subject: |
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yes i have heard of this
does that mean you can lock it in low mode -- say for motorway cruising -- my old RR used to lower itself as speed
and i think it made a difference to handling etc |
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wildsmith
Lifetime member
Joined: 20 Oct 2006
Posts: 1580
Location: Stourbridge, West Mids, UK
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| Posted: Sun Jan 25, 2009 16:31 Post subject: |
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| hodgy0_2 wrote: |
| does that mean you can lock it in low mode -- say for motorway cruising |
Yes, but I suspect low is too low for driving about, it's pretty much on the bump stops I think. I got it so I can put it in high and lock it there for larger tyres until the standard size are swapped back on. What you want is to switch an extra resistor into each of the height sensor circuits so that it drops a little but not all the way to low. In the summer I might get around to experimenting with that to see what other interesting things we can do with the AHC by modifying the sensor voltage levels like getting manual control of the extra 2" lift the traction control is supposed to use when it thinks you're grounded.
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Jon m0zxj
01 UZJ100 lifted (AHC & 40mm BL), ARB locked f&r, cryo'd 4.88's, TJM front bumper, 12k goldfish, sliders, rack, snorkel, 35's, storage, aux power etc.
93 HDJ80 sold
94 HDJ80 RIP |
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RADIOTWO
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Joined: 18 Nov 2005
Posts: 816
Location: GLOSSOP
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| Posted: Sun Jan 25, 2009 23:15 Post subject: |
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| wildsmith wrote: |
| carmellajade wrote: |
| yes I have the owners manual but tbh, it does only state that you can only "select" L or H under 19mph which we took to be mean, that once it has been selected, you are able to drive over the 19mph but obviously not! |
You can buy an electronic suspension lock from Slee that allows you to set the suspension height as normal and then throw a switch to hold it there regardless of speed. I have one but have not got round to fitting it yet. |
Hi Wildsmith
Can I hijack the thread?
you say Slee do a electronic suspension lock, I have searched there site and cannot see anything, have you any more info please?
Radiotwo |
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wildsmith
Lifetime member
Joined: 20 Oct 2006
Posts: 1580
Location: Stourbridge, West Mids, UK
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| Posted: Mon Jan 26, 2009 0:06 Post subject: |
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http://www.sleeoffroad.com/products/products_switches.htm - Lexus LX 470 AHC Controller
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Jon m0zxj
01 UZJ100 lifted (AHC & 40mm BL), ARB locked f&r, cryo'd 4.88's, TJM front bumper, 12k goldfish, sliders, rack, snorkel, 35's, storage, aux power etc.
93 HDJ80 sold
94 HDJ80 RIP |
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RADIOTWO
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Joined: 18 Nov 2005
Posts: 816
Location: GLOSSOP
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| Posted: Mon Jan 26, 2009 0:25 Post subject: |
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| wildsmith wrote: |
| http://www.sleeoffroad.com/products/products_switches.htm - Lexus LX 470 AHC Controller |
Thanks Jon
they suggest not to use it in the "low" setting but why would you want to run at "high" on the road?
Radiotwo |
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wildsmith
Lifetime member
Joined: 20 Oct 2006
Posts: 1580
Location: Stourbridge, West Mids, UK
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| Posted: Mon Jan 26, 2009 0:42 Post subject: |
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For running bigger tyres, especially for 'weekend' wheeling where you might have two sets of wheels and tyres, that's what I got it for anyway. I can put the suspension on high, flip the lock switch and pop the 35's on to go and play then when I come back, swap the wheels back over, flip the switch, drop the suspension and it's back to mall cruiser  Without the switch I'd be restricted to tyres that fit under standard height or not go above 19kmh 
For lowering it a bit for cruising you need a different solution IMO - modify the sensor voltage so the ECU thinks the car is higher than it really is and lowers it accordingly.
_________________
Jon m0zxj
01 UZJ100 lifted (AHC & 40mm BL), ARB locked f&r, cryo'd 4.88's, TJM front bumper, 12k goldfish, sliders, rack, snorkel, 35's, storage, aux power etc.
93 HDJ80 sold
94 HDJ80 RIP |
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