VCREAR_a120 — DI DRIVE MIA

Full alert identifier: VCREAR_a120_DI_DRIVE_MIA

Alert description

One or more of the messages the vehicle controller receives periodically from the front drive inverter (DIF) electronic control unit (ECU) is not received, indicating the DIF ECU may be unavailable (MIA).

Potential impact

Vehicle speed and power may be limited. Thermal management system features depending on DIF functionality may be limited or unavailable.

Set condition

One or more of the expected messages from the DIF ECU is not received.

Clear condition

The vehicle controller starts receiving the expected messages from the DIF ECU.

Signals to check

These diagnostic fields are associated with VCREAR_a120. Check the alert's Alert Log in Service Mode Plus for available values.

Signal	Unit
DIPR System Status `VCREAR_a120_DIPR_systemStatus`	—
EGGLEFTPRIV Aggregated Axle Speed `VCREAR_a120_EGGLEFTPRIV_aggregatedAxleSpeed`	—
EGGLEFTPRIV Chassis Cntl `VCREAR_a120_EGGLEFTPRIV_chassisCntl`	—
EGGLEFTPRIV Estimated Brake Temp `VCREAR_a120_EGGLEFTPRIV_estimatedBrakeTemp`	—
EGGLEFTPRIV Loc Status `VCREAR_a120_EGGLEFTPRIV_locStatus`	—
EGGLEFTPRIV Loc Status 2 `VCREAR_a120_EGGLEFTPRIV_locStatus2`	—
EGGLEFTPRIV Prnd Control `VCREAR_a120_EGGLEFTPRIV_prndControl`	—
EGGLEFTPRIV Speed `VCREAR_a120_EGGLEFTPRIV_speed`	—

Show 30 more fields

Signal	Unit
EGGLEFTPRIV System Status `VCREAR_a120_EGGLEFTPRIV_systemStatus`	—
EGGREARPRIV Aggregated Axle Speed `VCREAR_a120_EGGREARPRIV_aggregatedAxleSpeed`	—
EGGREARPRIV Chassis Cntl `VCREAR_a120_EGGREARPRIV_chassisCntl`	—
EGGREARPRIV Estimated Brake Temp `VCREAR_a120_EGGREARPRIV_estimatedBrakeTemp`	—
EGGREARPRIV Loc Status `VCREAR_a120_EGGREARPRIV_locStatus`	—
EGGREARPRIV Loc Status 2 `VCREAR_a120_EGGREARPRIV_locStatus2`	—
EGGREARPRIV Prnd Control `VCREAR_a120_EGGREARPRIV_prndControl`	—
EGGREARPRIV Speed `VCREAR_a120_EGGREARPRIV_speed`	—
EGGREARPRIV System Status `VCREAR_a120_EGGREARPRIV_systemStatus`	—
EGGRIGHTPRIV Loc Status `VCREAR_a120_EGGRIGHTPRIV_locStatus`	—
EGGRIGHTPRIV Prnd Control `VCREAR_a120_EGGRIGHTPRIV_prndControl`	—
EGGRIGHTPRIV Speed `VCREAR_a120_EGGRIGHTPRIV_speed`	—
EGGRIGHTPRIV System Status `VCREAR_a120_EGGRIGHTPRIV_systemStatus`	—
LC Speed `VCREAR_a120_LC_speed`	—
LEFTBODY Speed `VCREAR_a120_LEFTBODY_speed`	—
LEFTBODY System Status `VCREAR_a120_LEFTBODY_systemStatus`	—
LOOP Aggregated Axle Speed `VCREAR_a120_LOOP_aggregatedAxleSpeed`	—
LOOP Chassis Cntl `VCREAR_a120_LOOP_chassisCntl`	—
LOOP Loc Status `VCREAR_a120_LOOP_locStatus`	—
LOOP Loc Status 2 `VCREAR_a120_LOOP_locStatus2`	—
LOOP Speed `VCREAR_a120_LOOP_speed`	—
LOOP System Power `VCREAR_a120_LOOP_systemPower`	—
LOOP System Status `VCREAR_a120_LOOP_systemStatus`	—
LOOP Vehicle Estimates `VCREAR_a120_LOOP_vehicleEstimates`	—
RC Speed `VCREAR_a120_RC_speed`	—
REARSTEER Speed `VCREAR_a120_REARSTEER_speed`	—
RIGHTBODY Speed `VCREAR_a120_RIGHTBODY_speed`	—
RIGHTBODY System Status `VCREAR_a120_RIGHTBODY_systemStatus`	—
THERMAL Speed `VCREAR_a120_THERMAL_speed`	—
THERMAL System Status `VCREAR_a120_THERMAL_systemStatus`	—

Check other alerts

With Service Mode Plus enabled, open Service Alerts → All. Review the other alerts for clues to the cause of VCREAR_a120.