DIR_a155 — Vcfront MIA

Full alert identifier: DIR_a155_vcfrontMIA

Alert description

The drive interface (DI) electronic control unit (ECU) detects that the front vehicle controller (VCFRONT) controller area network (CAN) node is missing (MIA).

Potential impact

The DI ECU is unable to monitor the state of the VCFRONT.

Set condition

The DI ECU is not receiving the expected CAN communication from the VCFRONT, and considers it irrational or MIA.

Clear condition

The DI ECU receives the required CAN messages from the VCFRONT.

Signals to check

These diagnostic fields are associated with DIR_a155. Check the alert's Payload in Service Mode Plus for available values.

Signal	Unit
LV Power State `DIR_a155_LVPowerState`	—
Coolant `DIR_a155_coolant`	—
Left Door Status `DIR_a155_leftDoorStatus`	—
Liftgate Status `DIR_a155_liftgateStatus`	—
Restraint Status `DIR_a155_restraintStatus`	—
Right Door Status `DIR_a155_rightDoorStatus`	—
Sensors `DIR_a155_sensors`	—
Status `DIR_a155_status`	—

Show 3 more fields

Signal	Unit
System Status `DIR_a155_systemStatus`	—
Vcleft Switch Status `DIR_a155_vcleftSwitchStatus`	—
Vehicle Status `DIR_a155_vehicleStatus`	—

Check other alerts

With Service Mode Plus enabled, open Service Alerts → All. Review the other alerts for clues to the cause of DIR_a155.