Going absolutely crazy on this 4.8is suspension. Any Help?

[AussieXer]

Is there a quick way (without using expensive testers and software) of tested ride level sensors? Voltages reported by my Foxwell 510 are all over the place. Also heights reported seem nothing like those measured.

[LVR]

I've found that the system is quite sensitive to the actual process of how you go about things.

I use ISTA, which allows me to manually raise and lower each corner of the suspension from the laptop, reset the EHC module independently, reset the ride height offsets and do real time testing.

The real time testing allows you to watch the voltages on each corner and you then apply a load (someone sits on the bumper) and check for changes in the voltage. If no change then the sensor needs to be looked at as the voltage should change as it moves. If the sensor is ok then there are some youtube vids around about checking the input current from the module.

The real time testing is what allowed me to see the issue with my sensor. From memory all of my sensors were reading around 2.6 - 2.9 Volts, with my front left reading 0 Volts. I checked it to find that it was incorrectly set with the arm facing downwards.

My indy said to me that despite what was shown on the diagrams, one side is meant to have the arm down. I don't agree with that as I replaced the sensor and a new sensor with the arm up was 3.0 Volts.

[AussieXer]

According to my Foxwell NT510 my sensors are currently reading 4.50, 0.52, 0.79, 1.10. Do you think this is indicates a fault? I will disconnect the levers this afternoon and see if the voltage changes as I move them. Car still hard down and virtually undriveable but I will not let it beat me. If I eventually beat it I will write a user's manual on trouble shooting the SLS.

[EODguy]

Double check that you are not in transport mode as mine started the Zamboni imitation after trying to adjust the ride height and the resistor kept causing a cascade of shit that kept the CAN-BUS from allowing it to come out of transport mode. but worth a shot and to be honest you MUST use your ViN to order the resistor as there are set listed for your transmission that BMW has.

Realoem.com lists it for $33.10 USD but getting it here in Saudi Arabia jacked it up to 40 and six weeks of pissing off a very short very pregnant wife....

Sent from my SM-A730F using Tapatalk

[LVR]

Originally Posted by AussieXer

According to my Foxwell NT510 my sensors are currently reading 4.50, 0.52, 0.79, 1.10. Do you think this is indicates a fault? I will disconnect the levers this afternoon and see if the voltage changes as I move them. Car still hard down and virtually undriveable but I will not let it beat me. If I eventually beat it I will write a user's manual on trouble shooting the SLS.

I’ve not used the Foxwell but there is certainly an odd one out. I’d be getting a copy of the ISTA software (I got it through eBay.com.au) if I were you along with the cable. As I said above, you can reset the ehc module which clears the codes, then reset the adaptions. To do this it places the system in transport mode from memory then you need to drive it.

Regarding the odd one out, I bought a new sensor from fcp euro via the UK and it arrived pretty quick (not like these dropshippers who add 60 days) so I knew I was working with something correct. It meant I could play around with it and compare signals etc.

From what I’ve read and found, it’s often just a sensor and a reset of the module that sorts it out.

Having the ISTA also meant that I could try stuff and not have to go back to my Indy if it didn’t work

Cheers

[Gogubjp]

Maybe is still someone in here lool
Long story short ����

In the past with the original compressor, every sunday when i use the car, find it low (almoust down on front axle, and a bit down on rear axle), and when i unlock the car and open driver door, the suspension come back to normal. Never bother me, untill came every sunday Self.Lvl.Susp.Inact....so i need to delete it then suspension came back to normal....the error was Acumulator pressure remain constant.

I have buy the repair kit with o-ring from bagpipingandy, and everything work fine, still front axle going down every sunday, but no errors and the compressor works fine.
But i decided to buy a second-hand compressor, install it, works normal for 2 days, then came back the error....then again every sunday i find the error, so delete it, and suspension back to normal.

Yesterday, delete the error, suspension back to normal, no error on dash, drive the car for 20-25miles, park it on a small hill at idle, and suddenly came back Self.Lvl.Susp.Inact + tyre pressure....go home and scan it, and have found height sensor rear right.

Take out the rear right wheel, inspect the sensor, spray with some wd-40, everything seems OK, the plug is ok, the arm is ok....try to delete it, and the error go out for 1sec then come back but the tyre pressure stay there, never dissapear.

Try to reset the EHC2 module and do the adjustment precedure, but no luck (i didnt measure every wheel to write in the procesure exactlly what i have on my car, just type 19" wheel, and 710mm front and 712mm rear like have to be)....i have tried this adjustment 3 or 4 times, but no luck....i try to go on with Inpa on the error, and i can see the rear right height sensor isnt reading the correct value.

Finally i take the sensor out, find out where that 2 little screws go in the sensor was coroded, so i have buy a new sensor, install it, delete the errors, but no luck.....sls error+ tyre pressure still on dash. Try to recalibrate the height, and the sls error dissapear but the tire pressure (is yellow) still there.

What can be wrong ? Why the tire pressure wont dissapear ?
Should i take the new piston o-ring from the old compressor and install it on the second-hand one ?

Any help i apreciate.