Wednesday, October 2, 2013
How to Reset the Airbag Sensor on a 745i
The 745i is BMWs flagship sedan, carrying the most technologically advanced computer system that BMW has to offer. The 745i, like many other BMW vehicles, contains a vast network of sensors and computers that continually monitor the performance of various vehicle systems. The airbag system in a 745i is no exception to this rule, and has a dedicated standalone computer designed to operate and monitor the airbag system. When this computer detects a fault with the airbag sensor, it writes a trouble code to its memory and alerts the driver by turning on the Service Airbag light. Sometimes this light is illuminated due to a momentary fault with the airbag sensor. In this situation, the light and sensor can simply be reset be clearing the trouble codes from the airbag computers memory.
Instructions
- 1
Leave the ignition in the ON position with the engine off.
2Connect the data cable of an airbag-capable scan tool to the communications port on the 745i, mounted underneath the dashboard on the left side of the vehicle.
3Enter any information that the scan tools asks for such as the year, make, model, engine size, and trim level of your vehicle.
4Use the menu keys on the scan tool to go to the airbag menu. Select the option to clear the airbag computers memory and wait for the confirmation message from the scan tool stating that the memory is clear.
5Turn on the engine and make sure that the air bag light is off.
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