RX300 Air Suspension Height Offset

[Halliwell2099]

Evening all,

The ride height of the RX300 is a bit out and after replacing sensors I would like to re set it to the correct values through techstream.

does anyone know how this is done? The software is asking for the measure value and standard value.

i can't seem to find the standard value anywhere, and I also can't find the points of which I should be measuring.

 

any ideas?

thanks

 

[Halliwell2099]

Anyone got anything ?

[ChrisKaye]

Hi, I'll try and dig out the Service docs for you. You have to measure height from the centre of the wheel hub to the bottom outside middle edge of the wheel arch iirc... A real faff!

Re-reading my post it prob makes no sense, so to elaborate you'd need a tape measure or a solid 1m long ruler and measure from the centre of the hub (0cm on the ruler/tape measure) and go straight up to where the edge of the wheel arch intersects the ruler/tape measure...

Still probably as clear as mud!

Sent from my Iphone using Tapatalk

[ChrisKaye]

Alternatively, have you seen this post:

If you measure the height from the 'good' side you could manually adjust the height sensor rod (wind in or out the thread and then lock in with the locking nut on the new sensor/s) it might take a bit of trial and error but worth a shot of all else fails. As long as you have a reference point to start from, all should be good.

I'll keep looking for the service manual unless someone beats me to it! :)

Sent from my Iphone using Tapatalk

[Halliwell2099]

Thanks Chris,

I understand the measurement advice so thanks for that, I ended up doing the manual adjustment on the rod and it now sits fine and adjusts its self when weight is in the car etc.

 

would still like to adjust with Techstream to make sure all is ok, if you could post from the manual when you can that would be great, any idea where to get one of those, couldn't fine one on eBay

 

thanks

jamie

[ChrisKaye]

Hi Jamie, I have an online RX300 manual book marked somewhere, it has lots of useful stuff. Not found a complete source other than paying for limited time access via the Toyota/Lexus web site. Would prefer a book tho!

Sent from my Iphone using Tapatalk

[BigDingus]

I can make the adjustments on my suspension ok, but no where can I find the correct values.

I've seen 45cm and 47cm.

Is this at N setting?

[NickJrv]

@BigDingus How are you getting on? I've been trying to tackle a similar issue with mine. Here is a big of useful info from another forum if it helps you...

[BigDingus]

Nick. That’s exactly how I do the adjustments. As no one can say what the correct value is, I just aim for 46cm ish. If it looks ok I go with that. 

[NickJrv]

@BigDingus 

I was getting 47-48 on rear wheels today. Had the effect of lowering the overly pumped fronts to a similar height, so I'm staying put at that point! No more messing about and far safer than teh low rear and high front that I had before (all 4 sensors work fortunately and all struts are less than a year old)

That was all on 'N' setting. The H and L settings seem to have carried accordingly. It's about 2 cm more on each corner for 'H' setting. Haven't measured 'L' yet.

Any joy with your vehicle? 

[Jagman]

Out of interest I measured my rx450h and it’s 47cm all round in Normal

when going to low only the front drops down by 2.5 cm the rear doesn’t change.

I thoughht it might be more than this.

[BigDingus]

Nick as far as I can find out from speaking to mechanics and the Lexus guys, when the height is set to normal is when you do any measuring.

The H and L are referenced to the N setting. No one could tell me by how much. % or cm who knows. However, there is a resistance change in the sensors.

Jagman I don't have any knowledge of the RX450 but I would be very surprised if the rear wasn't supposed to adjust also.