Volvo XC90 air suspension / SUM calibration issue
#3
Hey, You don’t actually need to open VIDA to check if your sensor values have stabilized. You can monitor everything directly inside OrBit before doing the calibration!Here is exactly what you need to do to verify the system: In OrBit, go to the third tab: ECU Tools.In the top-left corner, under Active Diag ECU, select the SUM (Suspension Module) from the list.Make sure the request Type is set to Read Data by ID (0x22).Use the filter to select and monitor the following sensors:Front Left (FL) Height SensorFront Right (FR) Height SensorRear Left (RL) Height Sensor (the one you just fixed!)Rear Right (RR) Height SensorBody Acceleration Sensors (Front and Rear)Click the Parameters Monitor button at the bottom. What you need to look for:Observe the live readings while the car is stationary on flat ground:The values must be completely steady. You should see a flat line on the graph with no voltage fluctuations or sudden spikes.This will confirm that your repaired Rear Left sensor—along with the other three corners and the acceleration sensors—is sending a clean, reliable, and noise-free signal to the computer.Once you see that all four corners and acceleration sensors are steady and stable:You can safely close this monitor, go to the Service tab, and run the Air Susp. Calibrate routine. OrBit will override the old 0.55V error, level the car properly, and successfully save the new ride height reference!
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RE: Volvo XC90 air suspension / SUM calibration issue - by konrado1 - 06-02-2026, 10:33 PM

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