RSA_a100 — CA Nbus MIA
Full alert identifier: RSA_a100_CANbus_MIA
Alert description
More than half of the Electronic Control Units (ECUs) on either the Left CAN (LC) or Right CAN (RC) bus are missing more than half their messages while the bus should be active.
Potential impact
Vehicle functionality may not operate as expected.
Set condition
If 50% or more of the ECUs the local ECUs listens to are MIA, and the local ECU receives from more than 3 ECUs on this bus. An ECU is MIA if more than 50% of its messages are MIA and that ECU is considered CAN active (see specific ECU's MIA alert for CAN active conditions).
Clear condition
Less than 50% of the ECUs the local ECUs listens to are MIA, and the local ECU receives messages from more than 3 ECUs on this bus. An ECU is MIA if more than 50% of its messages are MIA and that ECU is considered CAN active (see specific ECU's MIA alert for CAN active conditions).
Signals to check
These diagnostic fields are associated with RSA_a100. Check the alert's Alert Log in Service Mode Plus for available values.
| Signal | Unit |
|---|---|
Lc
RSA_
|
— |
Rc
RSA_
|
— |
Rearsteer
RSA_
|
— |
Shaftp
RSA_
|
— |
Shafts
RSA_
|
— |
Check other alerts
With Service Mode Plus enabled, open Service Alerts → All. Review the other alerts for clues to the cause of RSA_a100.