Bus messages, airbag control module (ACM)

/ 9-3 (9440) / 2003 / 8. Body / Airbag system / Technical description / Bus messages, airbag control module (ACM)

For a detailed description of the car's bus system, see bus and diagnostics communication .

The ACM uses the following information

Information	Value/Unit	Off	Description
Diagnostics communication,		Diagnostic tool	The control module must receive a voltage feed and the bus leads must be intact.

The ACM sends the following information

Information	Value/Unit	Used by	Description
Airbag activated	On/Off	CU, ICM	The control module provides information regarding activated detonation circuits. The ICM uses the signal to generate a message in the SID. The CU uses the signal to inform emergency communication services when a collision has occurred.
Airbag warning lamp	lit / extinguished	ICM, MIU	MIU turns on the warning lamp with this message. ICM activates the warning message in SID.
Seat-belt buckle, driver	unlocked / locked	BCM	The airbag control module sends the message and uses the information for activation is necessary, see Control Module information. The BCM provides a seat-belt reminder by using this message.
Seat-belt buckle, passenger	unlocked / locked	BCM, ACC, ICM, CU	The ACM sends the message and uses the information for activation is necessary, see Control Module information. The BCM provides a seat-belt reminder by using this message.
Diagnostics communication,			The control module must receive a voltage feed and the bus leads must be intact.