air suspension height/steps ?????

Mike v.t.s · Jan 23, 2012

Hi all, need some advice for my rangie dse... i noticed it was leaning over a tad so i plugged it in at work and to cut a long story short i dropped a bollok:doh::doh:... i set the standard ride height to factory setting and now it just aint right, does any body have the correct height for all 4 corners? its measured in steps on my machine so if any 1 could help me by telling me what they are id be more than gratefull, theres 2 measurments it gives the height it should be and the actual height it is, im after the height it should be NOT what it is when you look at it as this allways changes according to being parked on a hill etc.. possibly only the chaps with diagnostic tools may be able to answer. many thanks... waiting with arse cheeks clenched (i plugged my bros rangie in to copy his but all the corners was differant same on my bosses but they are both 4.6 petrol not diesel)

Saint.V8 · Jan 23, 2012

All the height readings will be different from vehicle to vehicle....

What you will have to do is physically measure from centre of wheel arch to centre of wheel and adjust the height reading figure by a few digits up or down, then re-measure the height and continue the adjustment of height readings and re-measuring until you get all four corners to sit within 4-5mm of each other at the right ride height...

The heights are as follows:

Access = 405mm
Motorway = 445mm
Standard = 470mm
High = 510mm

It will be a case of measure - adjust values - remeasure- adjust values - remeasure- adjust values- remeasure until you get it sitting at the correct heights above.

The other way is to use spacers of a set height for each ride ehight between the axle and bump stop bracket, then transferring the height readings into the set value box and write them to the ECU, but unless you have the right spacers it would be best to do the long winded method.

Datatek · Jan 24, 2012

As saint said you cannot just put a figure in, it varies from vehicle to vehicle due to the height sensors being less than precision devices. You measure from the wheel centre to the wheel arch and you do it for each corner and for each setting and moving one affects all the others so it needs patience.

Irishrover · Jan 24, 2012

As others have posted, the height sensors are far from being "Precision" parts. It is basically a potentiometer and they are made to operate within a tolerance that is far larger than say, a linear transducer or optical read heads used on CNC machine tools.

As a matter of interest though, here are the bit counts for my own P38 that sits level and is well within the +/- 7mm tolerance stipulated:

HIGH
Front Left 147 Front Right 147 Rear Left 125 Rear Right 122

STANDARD
FL 116 FR 116 RL 99 RR 95

LOW PROFILE ("MOTORWAY")
FL 96 FR 98 RL 86 RR 86

ACCESS
FL 74 FR 70 RL 68 RR 63

If you are completely stuck, you could check/enter the above values to give you a rough starting point, but you can be sure that you will have to make adjustments to suit your own setup. I use a measuring stick that is marked with the correct heights for all height settings relative to my P38 with 18" wheels and I measure from the floor to the wheel arch so I don't have to p**s around with a tape measure from the hub centre to the wheel arch. The lines on the stick tell me at a glance if I need to go higher or lower.
Be sure to check and adjust the heights on firm level ground with tyres at normal pressures.

Mike v.t.s · Jan 26, 2012

Irishrover said:
As others have posted, the height sensors are far from being "Precision" parts. It is basically a potentiometer and they are made to operate within a tolerance that is far larger than say, a linear transducer or optical read heads used on CNC machine tools.

As a matter of interest though, here are the bit counts for my own P38 that sits level and is well within the +/- 7mm tolerance stipulated:

HIGH
Front Left 147 Front Right 147 Rear Left 125 Rear Right 122

STANDARD
FL 116 FR 116 RL 99 RR 95

LOW PROFILE ("MOTORWAY")
FL 96 FR 98 RL 86 RR 86

ACCESS
FL 74 FR 70 RL 68 RR 63

If you are completely stuck, you could check/enter the above values to give you a rough starting point, but you can be sure that you will have to make adjustments to suit your own setup. I use a measuring stick that is marked with the correct heights for all height settings relative to my P38 with 18" wheels and I measure from the floor to the wheel arch so I don't have to p**s around with a tape measure from the hub centre to the wheel arch. The lines on the stick tell me at a glance if I need to go higher or lower.
Be sure to check and adjust the heights on firm level ground with tyres at normal pressures.

Thanks for that, imine started leaning to the driver side really bad then after driving for a while it settled down so i decided to check the settings and thats how i cocked it up, the air bags are fine only 2 years old and they are genuine dunlops no leaks i checked um, now it seems that its both front thats kneeling down but sometimes sorts its self but i have noticed that the front is still lower than the rear, il put the settings in and adjust from there, thanks for the settings and advice... this site is fecking brilliant lol

air suspension height/steps ?????

Mike v.t.s

Active Member

Saint.V8

Dyed-in-the-wool 100% RR Junkie

Datatek

Well-Known Member

Irishrover

Well-Known Member

Mike v.t.s

Active Member

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