VCTRAILER_a100 — CA Nbus MIA

Full alert identifier: VCTRAILER_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 VCTRAILER_a100. Check the alert's Alert Log in Service Mode Plus for available values.

Signal	Unit
Dipr `VCTRAILER_a100_DIPR`	—
Eggleftpriv `VCTRAILER_a100_EGGLEFTPRIV`	—
Eggrearpriv `VCTRAILER_a100_EGGREARPRIV`	—
Eggrightpriv `VCTRAILER_a100_EGGRIGHTPRIV`	—
Lc `VCTRAILER_a100_LC`	—
Leftbody `VCTRAILER_a100_LEFTBODY`	—
Loop `VCTRAILER_a100_LOOP`	—
Rc `VCTRAILER_a100_RC`	—

Show 3 more fields

Signal	Unit
Rearsteer `VCTRAILER_a100_REARSTEER`	—
Rightbody `VCTRAILER_a100_RIGHTBODY`	—
Thermal `VCTRAILER_a100_THERMAL`	—

Check other alerts

With Service Mode Plus enabled, open Service Alerts → All. Review the other alerts for clues to the cause of VCTRAILER_a100.