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

[mr_robot]

You need to change the TC fluid (only use Genuine BMW) and well the other two coded like others stated you need to buy replace those parts.

Also you need to reset adaptation after the fluid change because the fault code will not go away by itself even after fresh fluids. I've been there done that on my E70.

[EODguy]

TPMS light - Push and hold for 15 seconds and TPMS should sync & light will go out.

Go in live test and run full set on suspension if you still find nothing it may be something as simple as your rocker switch is toasted

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[EODguy]

Originally Posted by mr_robot

You need to change the TC fluid (only use Genuine BMW) and well the other two coded like others stated you need to buy replace those parts.

Also you need to reset adaptation after the fluid change because the fault code will not go away by itself even after fresh fluids. I've been there done that on my E70.

TC fluid changed along with OBD2 since it got fried. The resistor is what put mine into transport mode and also makes it throw code for servo.

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[m3j0n]

Originally Posted by mr_robot

You need to change the TC fluid (only use Genuine BMW) and well the other two coded like others stated you need to buy replace those parts.

Also you need to reset adaptation after the fluid change because the fault code will not go away by itself even after fresh fluids. I've been there done that on my E70.

Motul is $15 a liter, OEM is $45 a liter... wtf.. how do i reset adaptations?

Originally Posted by EODguy

TPMS light - Push and hold for 15 seconds and TPMS should sync & light will go out.

Go in live test and run full set on suspension if you still find nothing it may be something as simple as your rocker switch is toasted

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yep, tried that, it doesnt reset the tire light.
how do you run the full test on the suspension? Where is the rocker switch?

Originally Posted by EODguy

TC fluid changed along with OBD2 since it got fried. The resistor is what put mine into transport mode and also makes it throw code for servo.

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Im gonna flush the fluid and put in a new resistor today. Thanks.

[m3j0n]

bought a new resistor -
currently installed resistor resistance measured 3150 ohms
New Oem resistor resistance measured 2500 ohms


is that enough of a difference to cause a problem?

[wpoll]

Originally Posted by m3j0n

bought a new resistor -
currently installed resistor resistance measured 3150 ohms
New Oem resistor resistance measured 2500 ohms


is that enough of a difference to cause a problem?

Could be - who knows? What I read is that the resistor value is selected in the factory once the TC case is tested, i.e. the resistor value is matched to each individual
TC case.

I guess if you fit the new resistor, we are all about to find out how much it actually matters!

*edit* next time I'm under my car, I'll measure mine. If we all do this, we can build up a picture of the resistance value range across the group....

[SlickGT1]

Get someone with INPA or dis to reset your suspension inactive. Should lift right up and light will return to heights switch.

Not sure how tcase oil, or something else causing lift issues. Pump accumulator, pump, bags, height sensors, maybe yaw sensor.

TCase adaptations? Some silly shit being thrown around.

Your errors suggest that your pump is not turning on. You also have some crazy numbers on that front left sensor. Are you sure that adjuster arm on the ride sensor is not upside down? Happened to quite a few people on here.

[EODguy]

The resistor will be fine. After talking to the mechanic, the transmission has a set of parameters assigned after testing at the factory and the resistor has an assigned range that with acceptable variations that the CAN will accept and once outside of those parameters the CAN gets bad data (hence e53 early/late, e70 various years) have different part #'s.

I believe that may be why at least for mine it shut my suspension down into transport mode. I would clear the adaptations (after learning current values)

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[m3j0n]

Originally Posted by SlickGT1

Get someone with INPA or dis to reset your suspension inactive. Should lift right up and light will return to heights switch.

Not sure how tcase oil, or something else causing lift issues. Pump accumulator, pump, bags, height sensors, maybe yaw sensor.

TCase adaptations? Some silly shit being thrown around.

Your errors suggest that your pump is not turning on. You also have some crazy numbers on that front left sensor. Are you sure that adjuster arm on the ride sensor is not upside down? Happened to quite a few people on here.

I have INPA, but have really only used it on 3-series cars. Can you tell me how to "reset" the suspension using INPA?

I didnt understand how the TC could cause the suspension issue either, but Im grasping at straws here trying to figure out whats going on with this thing. I mean, I do have the "4x4" light on the cluster that doesnt go out until the car moves.

I didnt think that you could install the sensor upside down; I thought there is only one way to install it.

Originally Posted by EODguy

The resistor will be fine. After talking to the mechanic, the transmission has a set of parameters assigned after testing at the factory and the resistor has an assigned range that with acceptable variations that the CAN will accept and once outside of those parameters the CAN gets bad data (hence e53 early/late, e70 various years) have different part #'s.

I believe that may be why at least for mine it shut my suspension down into transport mode. I would clear the adaptations (after learning current values)

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is there a way to actually confirm that my car is in "transport" mode vs. an actual problem with the suspension?

[SlickGT1]

yea go into car with INPA, got to the 2 axle air suspension part, read codes, erase codes. Suspension inactive goes away.

Check transport mode, by going onto 2 axle air suspension, and go to activate, you will see transport mode active and another to disable it. You will also see transport mode as an error when you read codes.