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Home >> BMW >> 2018 >> X3 M40i >> Repair and Diagnosis >> External Pages >> Different car >> Section 763 (Functional Descriptions - F25 - Charging System, Anti-Theft, Body Electrical Systems) >> Body Electrical System - Functional Description >> Parking aid >> Notes for Service department >> Procedure for troubleshooting

Procedure for troubleshooting

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NOTE: Check the mechanical condition of the ultrasonic sensors!

Before troubleshooting, first check the mechanical condition of the ultrasonic sensors. Make sure that the ultrasonic sensors are fitted correctly in their brackets and the decoupling element and that they are free from dirt contamination, ice and snow.

NOTE: Secure the vehicle to prevent it from rolling when the selector lever is in position N!

The acoustic signal is switched off when selector lever position P  is engaged. Therefore, check the PDC function with the selector lever position N  and also secure prevent vehicle against rolling.

NOTE: Avoid allowing other factors to influence the troubleshooting procedure!

During the troubleshooting procedure, there should be no detectable object closer than 1 m at the front and sides or 2 m at the rear within the detection range of the ultrasonic sensors.

NOTE: Watch for correct seating of the decoupling element on the ultrasonic sensor!

The correct fit of the correct decoupling element is important. Otherwise the transmit/receive mode will be impaired.

NOTE: Use care when mounting licence plate baseplate!

When mounting licence plates and licence plate holders, attention must be paid to ensuring that the middle sensor in the front bumper is not covered. The licence plate bracket itself, and accumulated deposits of dirt, snow or ice on the bracket in the area above the center sensor can impair this sensor's operation and lead to spurious warnings.

Observe the following specifications for the license plate baseplate:

NOTE: Never attempt to repair or modify the ultrasonic sensor!

Ultrasonic sensors must not be painted. Neither touching up nor complete painting are permitted.

NOTE: Cleaning the ultrasonic sensors!

With high pressure cleaners, spray the ultrasonic sensors for a short period and from a distance of at least 30 centimeters. We can assume no liability for printing errors or inaccuracies in this information and reserve the right to introduce technical modifications at any time.