Conditions for Setting the DTC

WARNING: This page is about a different car, the 2007 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.

DTC B3855 will set when one of the following conditions occur:
- A valid ID message is not received within 5 seconds of the ROS being powered up.
- A status message is not received.
DTC B3856 will set when one of the following conditions occur:
- The SDM has received a NOK message from the ROS.
- A ROS internal fault exists for a 127 ignition cycles.
DTC B3857 will set when the SDM has received an ID message from the ROS that does not match the ID stored in the SDM memory.