DI_a193 — Vdc Brake Torque Fr

Full alert identifier: DI_a193_vdcBrakeTorqueFr

Alert description

Drive Inverter (DI) does not receive proper front brake torque signals from the Electronic Stability Program (ESP) module.

Potential impact

Traction control and stability control may not operate as expected due to this error. The vehicle should be driven with extreme caution if these systems are not operating as expected.

Set condition

The DI is receiving improper or implausible brake torque signals from the ESP. Check alert payload brake torque data for front left (brakeTorqueFrL) and front right (brakeTorqueFrR) to see the specific cause (frozen signal, signal rate limit exceeded, or CAN issue). CAN issues should be diagnosed and can be caused by the ESP not communicating on the PARTY CAN bus or general bus error frames or shorts.

Clear condition

If this alert is set due to rate or freeze check, it will clear on the next drive cycle. If the alert is set due to CAN issues it will clear on the drive cycle after the CAN issues have been resolved.

Signals to check

These diagnostic fields are associated with DI_a193. Check the alert's Alert Log in Service Mode Plus for available values.

Signal	Unit
Brake Torque Fr L `DI_a193_brakeTorqueFrL` 0 VALID 1 RANGE 2 FREEZE 3 RATE 4 QF 5 CAN 6 QF VALIDITY 7 TEMP QF INVALID	—
Brake Torque Fr L Curr Val `DI_a193_brakeTorqueFrLCurrVal`	Nm
Brake Torque Fr L Last Val `DI_a193_brakeTorqueFrLLastVal`	Nm
Brake Torque Fr R `DI_a193_brakeTorqueFrR` 0 VALID 1 RANGE 2 FREEZE 3 RATE 4 QF 5 CAN 6 QF VALIDITY 7 TEMP QF INVALID	—
Brake Torque Fr R Curr Val `DI_a193_brakeTorqueFrRCurrVal`	Nm
Brake Torque Fr R Last Val `DI_a193_brakeTorqueFrRLastVal`	Nm

Check other alerts

With Service Mode Plus enabled, open Service Alerts → All. Review the other alerts for clues to the cause of DI_a193.