Acceleration Sensor Body
GENERAL
Type
Acceleration sensor: Capactive micromechanical sensor. Output signal 0 - 5 V is proportional to acceleration.
characteristic
Acceleration sensor: Voltage between terminals #1 and #2 should be approx. 2 V when vehicle is stationary. Voltage fluctuates around this value during accelerating movements.
Other information
The front acceleration sensor and rear acceleration sensor are not the same. If an acceleration sensor does not have supply voltage, the input signal to the suspension module (SUM) becomes approx. 2.36 V (no diagnostic trouble code for such).
TERMINAL
| Connector terminal | Control module terminal | Signal type | Other |
|---|---|---|---|
| #1 | #A10 front left #A22 front right #A17 rear left |
Signal, acceleration sensor | Voltage |
| #2 | #A19 front left #A19 front right #A23 rear left |
Ground | DC voltage |
| #3 | #A13 front left #A13 front right #A13 rear left |
Power supply +5 V | DC voltage |
CHECK
Prerequisites (unless otherwise specified):
- Breakout box connected.
- Sensor connected.
- Ignition switch position II.
Check 1
Acceleration sensor:
Measure the power supply for the acceleration sensor in question. The value should be: U ≈ 5 V at ignition switch position II.
Check 2
Acceleration sensor:
Measure the voltage between signal and ground for the acceleration sensor in question. The value should be U ≈ 2 V with the vehicle stationary.
The signal fluctuates around 2 V when the vehicle accelerate vertically (is rocked)