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 | 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 | OnStar (US/CA) | The control module provides information regarding activated detonation circuits. The MIU uses the signal to generate a message in the 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 airbag control module transmits 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. |
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