Level control system sensors, hecking

General information:

Vehicle Level Sensors transmit a Pulse Width Modulation (PWM) signal (representing vehicle attitude, load etc.)to the Headlamp Range Control Module J431.

The checking procedure determines if the signals produced by Left Rear Level Control System Sensor G76 and Left Front Level Control System Sensor G78 are evaluated by Headlamp Range Control Module J431.

In the following cases, no DTC are stored in Headlamp Range Control Module J431 memory:

when vehicle level sensors are not installed as specified in the article
when vehicle level sensors are damaged mechanically
when vehicles have a modified axle geometry (e.g. lowered vehicle)

NOTE:

If values of vehicle level sensors are outside the tolerance range, headlamp basic setting cannot be performed.

Connect Vehicle Diagnosis, Testing and Information System VAS 5051/5052 → VAS 5051 / 5052 under Vehicle Diagnostic, Testing and Information System VAS 5051 / 5052, onnecting
Select operating mode "Guided Fault Finding"
Enter information as prompted and press ">" to confirm.

After the DTC memory of all control modules has been checked:

Use "Go to" button to select "Function / Component Selection"
Select "Body (Repair Group 01; 27; 50-97)"
Select "Electrical system int/ext (Repair Group 01; 27; 90-97)"
Select "01 - Self-diagnosis"

Select "Automatic vertical headlight aim control"
Select "Functions"
Select "Check level control system sensor"
Follow tester prompts