L322 Adaptive Dynamics Height Sensor issue (but it works...)

Moving through the list of issues with my 4.4 TDV8, I have also started to get an issue with the Adaptive Dynamics which is complaining of a height sensor on the NSR:

ADCM-Active Damping

• C1A05-22 (2E) Rear left height sensor - General signal failure - signal amplitude>maximum
  ( on 24-06-2024 22:17:54 at 88363 mi )

I disconnected it the other night to inspect the wiring as I'm not sure that the height sensor has failed, here's why; The air suspension is working just fine. Car goes up, car goes down, access mode, no errors etc, all great. I can't see any cracking or corrosion etc. on the wiring and the connector is in perfect order inside as far as I can see.

I reconnected it, fired up GapIID, went into the live values and monitored the voltage whilst moving the sensor up and down by hand. The voltage changes were instant and nicely between (roughly) 1.2v- 3.8v from memory. To my mind that is working just fine however, if I clear the fault with GapIID it returns imediately and is of course stopping Terrain Response working etc.

Now, this is where I want some opinions, I have only had one height sensor issue before and that was with the good lady's D4 (corroded wiring). The D4 only has a 3 wire connector to the height sensor whereas the RR has a 6 wire connector. I suspect this is due to the Adaptive Dynamics on the RR. So, do we collectively think that I have a failed sensor? Are there two tracks in the 6 wire unit and that is why my air suspension is fine but adaptive dynamics aren't?

I would swap the sensors side to side to see if the fault goes with it but it seems they are handed and also, in my previous experience, the brass bush seizes to the screw holding it and then strips out of the plastic so I had to destroy the old sensor to remove it on the D4. I don't want to be in that situation with a working sensor to test it.

Thoughts?

I would agree with your reason for 6 wires. Is it fubared????
But GAP doesn't seem to see that side. Have you tried a meter on both sides to see if you get a smooth movement.

J

The six wires indicate two separate sensors in one housing, later versions used a three wire sensor and broadcast the values on CAN. I would check the wiring though, make sure you have a full 5.0VDC between pins 2 & 3 and something over 4.5VDC on pin 6 when disconnected.