Height Sensor
GENERAL
Type
Height sensor: Hall sensor with magnet in rotor, ASIC, that detects the angle of the magnetic field. Output signal 0 - 5 V is proportional to angle. Measurement range: -35 degrees to +35 degrees.
characteristic
Height sensor: Voltage between terminals #1 and #2 should be approx. 2.5 V at rest and when vehicle is stationary. Voltage fluctuates around this value during vertical movements.
Other information
Height sensors on the right and left side have differing output signals during compressed/extended suspension. During compressed suspension, the sensors on the left side have a signal of about 0.5 V while those on the right have a signal of approx. 4.5 V. During extended suspension, sensors on the left side have a signal of approx. 4.5 V while those on the right have approx. 0.5 V.
TERMINAL
| Connector terminal | Control module terminal | Signal type | Other |
|---|---|---|---|
| #1 | #A23 front left #A19 front right #A23 rear left #A23 rear right |
Ground | DC voltage |
| #4 | #A12 front left #A27 front right #A28 rear left #A14 rear right |
Signal, height sensor | Voltage |
| #5 | #A25 front left #A13 front right #A25 rear left #A13 rear right |
Power supply +5 V | DC voltage |
CHECK
Prerequisites (unless otherwise specified):
- Breakout box connected.
- Sensor connected.
- Ignition switch position II.
Check 1
Height sensor:
Measure the power supply for the height sensor in question. The value should be: U ≈ 5 V at ignition switch position II.
Check 2
Height sensor:
Measure the voltage between signal and ground for the height sensor in question. The value should be U ≈ 2.5 V with the vehicle stationary.
The signal fluctuates around 2.5 V when vehicle height changes (increased/reduced load)