suspension warning light on after major service

Was the front bumper or front luggage compartment disturbed? There is a brake fluid pressure sensor in the front luggage compartment, and, of course, the accelerometers in the bumper.

You'd probably get CELs for this, too (as the speedo feeds into the ECUs).

Do you have someone to check that the actuators turn when you turn on the ignition?

 

You likely need an SD to reset / clear the faults. Brian S sent me one to clear as his Leo could not do it. I documented it in my SD2 thread.

Ship the ECU to me Mitch, I'll install in my car and clear the fault just as I did for Brian. I take payment in beer - oh wait - I'm on a no-carb diet so forget that

 

Crazy question but was the car in a cool garage for an extended period of time? When my car is left untouched for over a month or more in my cold garage during the winter the suspension light will come on. I suspect because the plastic gears inside get cold and dont move properly. If I let the vehicle warm up, turn it off and start up the car the suspension lights go off.

 

I believe it's unique to the suspension system. Component "07031" on the suspension wiring diagram. I couldn't find this number on the Teves diagram.

 

Mitchell before you go do that make sure you check each each top of the shock and turn by hand both direction stop to stop.
Also have someone turn on ignition and make sure each motor turns.
I would then make sure you did not pinch a wire on any of the back shocks.
If all thats good Im out.

 

Dave I am having the same issue would you like to reset my suspension ecu
ill send you a gift card for the beer

 

I was joking about the beer

So, yes but as Grant stated, you need to be sure you don't have a real issue because it will just fault again the second you reinstall. I can also read the codes. The issue could be a bad acceleration sensor. I solved this on my friends 575.

Next week I go to Cavallino so I can't do anything until I get back.

 

I had something similar last month. The wiring broke internally going to the actuator, I would shake the harness and it would come on and off.

 

Acceleration sensor faults are common on 360 and up. Different suspension system. I have never seen an acceleration sensor problem on a Bilstien car. 99% of the time it is a shock, an actuator or a speed signal. Just because the speedo works does not mean the system is getting a speed signal.

The cars are old and the harnesses are getting fragile. Even if very careful they can be damaged easily. The harness design on post 95 cars was very poor. Having to drag the thing through too small a space was dumb x 100. Should have had a bulkhead connector. Last one I did fractured a wire to a crank sensor. The wire Delphi used was not a high grade. The pre Delphi harnesses from 10 years earlier are in better condition.

 

Thanks. Appreciate the insight.

 

OK. Again, I can't get to it until 2/2 the earliest.

 

I have not near the experience as Brian but I have done 3 majors on my car and 2 times when the service was done I had issues with fuel pump not working, and the other was a coil I believe. Both times it traced back to the main ecu plug.
Note to readers if after major a component does not work check the main harness. Its starting to,look like this is a good guess many times.

 

Error codes read and cleared. Unit will be shipped back tomorrow.


Image Unavailable, Please Login

 

Well, at least the left front actuator is ok

Do we know what they mean by "locked" and "not in position"? Are any of these messages generated because you're testing the ECU out of the car or because Mitchell powered up the ECU with the actuators not plugged in?

There seems to be no common wiring between the front and rear actuators (except the plug on the ECU).

Suspension wiring schematic (2.7)

 

ferraridriver did quite a bit of work on this years ago on the 550. His insights are worth a search

 

Ian, these are stored faults. To read them, I installed the ECU in my car.

 

Not in position means not connected to the shock. Locked means the system has set as best as possible a known default position and will leave it there.

 

Looks like the key was turned on when the engine was out of most was disconnected.

 

Nope. The only one that turns itself out is the speed sensor error.