PRE-RELEASE
Bus messages, airbag control module (ACM)
| 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 | From | 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 | BCM OnStar (US/CA) | The BCM uses this to activate the interior lighting, to send a bus message to activate dipped beam, to activate the hazard flashers and to unlock all doors. The OnStar control module provides information regarding activated detonation circuits. The MIU uses the signal to generate a message in SID. OnStar uses the signal to inform emergency communication services when a collision has occurred. |
| Airbag warning lamp | lit / extinguished | MIU | MIU illuminates the warning lamp with this message and 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, OnStar (US/CA) | 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. |
