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Author Topic: Self levelling suspension woes  (Read 785 times)

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Entwood

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Re: Self levelling suspension woes
« Reply #30 on: 05 October 2017, 11:58:53 »

Spot on Nige :y headlight levelling has it's own ecu above the levelling pump, and like you say totally separate  ;)

Can't remember which side the loom runs, suspect lhs as that's where most of it is. Test the loom all the way through from sensor plug to pump. If no continuity then you've found the issue :y

sounds easy .. BUT .. eight pins on the sensor, four on the plug, so a nightmare (for me) to work out which pins do what !!

Only way I can do it is to test every pin on the sensor to every pin on the pump and see if any work ...   :( and not doing that in the rain !! :(

Bodge will remain until after this weekend, then hopefully a replacement sensor will arrive, if THAT doesn't work then I'll look at continuity checks !
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Doctor Gollum

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Re: Self levelling suspension woes
« Reply #31 on: 05 October 2017, 11:59:50 »

Give me a minute...
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Re: Self levelling suspension woes
« Reply #32 on: 05 October 2017, 12:28:50 »

Give me a minute...
X20 under rear seat.
X8 primary plug at passenger A post

Sensor pinouts...

A Red to X20 pin 2
B BrownWhite to X20 pin 7
C Yellow to X20 pin 2
D White to X20 pin 5
E Brown to X20 pin 6
F BlueRed to X20  pin 8
G Not used
H Black to X20 pin 4

X20 pinouts
1 Not used
2 Yellow to X8 pin 34
3 Red to X8 pin 11
4 Black to Fuse 15
5 White to Pin A on pump
6 Brown to Ground body front left
7 BrownWhite to X8 pin 39
8 BlueRed to Abs pin 24

X8 pinouts
8 Black to Relay pin 4 (87)
11 Red to Fuse 27
34 Yellow to Relay pin 1 (85)
39 BrownWhite to Diagnostic socket pin 8

Relay pinouts...

1(85) Yellow to X8 pin 34
2 Not used
3(86) Black to Fuse 15
4(87) Black to Pump pin B
5(30) Red to Fuse 27

Pump pinouts...
A White to X20 pin 5 (grounds the solenoid at the sensor)
B Black to X8 pin 8 (12v feed via Relay)
C Red from Fuse 27 (permanent feed to the solenoid)
D Brown to Ground body front left
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Doctor Gollum

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Re: Self levelling suspension woes
« Reply #33 on: 05 October 2017, 12:29:18 »

Incidentally, you have checked BOTH fuses?
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Entwood

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Re: Self levelling suspension woes
« Reply #34 on: 05 October 2017, 12:33:16 »

Incidentally, you have checked BOTH fuses?

Only knew about the one ... F27 !! off to check the other now .. and your pinout printed, many, many thanks  :y :y
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Doctor Gollum

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Re: Self levelling suspension woes
« Reply #35 on: 05 October 2017, 12:33:52 »

You're welcome :y
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Entwood

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Re: Self levelling suspension woes
« Reply #36 on: 05 October 2017, 12:48:49 »

F15 & F27 both good.... waves farewell to easy fix :(

Plan of action is ... Bodge remains in place to keep me mobile this weekend, I have an AGM to run and MUST use the tintent as well as carry two and a half tons of shit that is already on the back seat !! so as the bodge appears to be working I'll use it !!  :-\ :-\

Early next week, with any luck, new sensor should arrive, easy enough to replace, if it works .. problem solved.  :y  :y

If it doesn't .. then with your pinout I make up long extensions for the multimeter and start crawling underneath the motor ....   :'( :'(

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Migv6

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Re: Self levelling suspension woes
« Reply #37 on: 05 October 2017, 12:53:25 »

F15 & F27 both good.... waves farewell to easy fix :(

Plan of action is ... Bodge remains in place to keep me mobile this weekend, I have an AGM to run and MUST use the tintent as well as carry two and a half tons of shit that is already on the back seat !! so as the bodge appears to be working I'll use it !!  :-\ :-\

Early next week, with any luck, new sensor should arrive, easy enough to replace, if it works .. problem solved.  :y  :y

If it doesn't .. then with your pinout I make up long extensions for the multimeter and start crawling underneath the motor ....   :'( :'(

No wonder the suspension has thrown a hissy fit !  :o :D
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Re: Self levelling suspension woes
« Reply #38 on: 05 October 2017, 19:19:14 »

Entwood - I was after the live data, not the error codes (that will be tosh anyway, given the things you've done).

Is live data (Measuring Blocks IIRC on "that" crap reader) showing the sensor moving? If so, start measuring the outputs from sensor.


If suffering CBA and fancy a trip to Brakkers... ;)
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Entwood

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Re: Self levelling suspension woes
« Reply #39 on: 05 October 2017, 19:51:59 »

Entwood - I was after the live data, not the error codes (that will be tosh anyway, given the things you've done).

Is live data (Measuring Blocks IIRC on "that" crap reader) showing the sensor moving? If so, start measuring the outputs from sensor.


If suffering CBA and fancy a trip to Brakkers... ;)

Ahh ..ok .. no idea how to do live data on the unmentionable, and no time to learn this weekend...

Methinks I'll stick with the present plan, bodge remains as works (even with the tintent on the back - checked that this afternoon), until the promised sensor arrives, if that works then problem solved .. if it don't ... maybe a trip to Brackers before I start crawling about  doing pinout continuity checks ....
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Entwood

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Re: Self levelling suspension woes
« Reply #40 on: 09 October 2017, 17:55:56 »

With many grateful thanks to omegod we seem to have got somewhere :)

Replacement sensor arrived today, now fitted and it all seems to work... not had a substantial test, but with a load of tools in the back it went up, and when I took them out it sat high and then went down once powered....  :)

Seems to sit about 20 mms lower than the optimum 675 quoted by others on the forum and looks a tad lower than it used to be looking at its position relative to the tyre as I usually do.... perhaps  a bit of use will sort it out, if not, are these sensor arms adjustable in any way ??

Doing 200 odd miles solo wednesday and then towing the tintent on friday and back on sunday, so will have given it a good workout by sunday night !!

I'll let you all know .........    :)

Many thanks for all the help and advice ... OOF at its best  :y :y

BTW .. the "bodge"  worked brilliantly with the tintent and heavily loaded car over the weekend .. sat perfectly level and towed like a dream   ;)
« Last Edit: 09 October 2017, 17:57:57 by Entwood »
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TheBoy

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Re: Self levelling suspension woes
« Reply #41 on: 09 October 2017, 17:58:31 »

I vaguely recall a tech2 calibration routine, but it was unsuccessful on chrisgixers (that had lowered springs on).
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Re: Self levelling suspension woes
« Reply #42 on: 10 October 2017, 08:31:25 »

Easiest method is to manually adjust the arm by bending it  :y
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Entwood

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Re: Self levelling suspension woes
« Reply #43 on: 10 October 2017, 11:47:32 »

Easiest method is to manually adjust the arm by bending it  :y

Thought someone would say that !!  I'll see if it settles down before going that way, but it certainly an option. :)
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Re: Self levelling suspension woes
« Reply #44 on: 16 October 2017, 11:48:18 »

Well, after towing the tin tent this weekend it all works fine, so thanks to everyone. Still sits 150mm too low however :(

Spent a while this morning examining the "old" one with a view to practising bending the arm to "adjust" the height, but can't, for the life of me, see a way to do it without causing damage.

The "S" bend between the ball joints is hard, brittle metal that will snap if maltreated.

The "lever arm" between the sensor body and the ball joints is pre-formed with a strengthening "dish" to prevent it bending in the direction I want it to go !!  It will bend "in and out" but not "up and down". I dare say heat on the right angle bend would allow it to move somewhat, but what would that heat do to the sensor !!!

Unless I'm missing something simple ... and probably am !!

 :-\ :-\
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