DI_a194 — Vdc Brake Torque Re

Full alert identifier: DI_a194_vdcBrakeTorqueRe

Alert description

Drive Inverter (DI) does not receive proper rear 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 rear left (brakeTorqueReL) and rear right (brakeTorqueReR) 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

Open this alert in Service Mode Plus and review the Payload tab. Use the field names below to identify the values shown by your vehicle.

Signal	Unit
Brake Torque Re L Curr Val `DI_a194_brakeTorqueReLCurrVal`	Nm
Brake Torque Re L Last Val `DI_a194_brakeTorqueReLLastVal`	Nm
Brake Torque Re R Curr Val `DI_a194_brakeTorqueReRCurrVal`	Nm
Brake Torque Re R Last Val `DI_a194_brakeTorqueReRLastVal`	Nm

Signal	Unit
Brake Torque Re L `DI_a194_brakeTorqueReL` 0 VALID 1 RANGE 2 FREEZE 3 RATE 4 QF 5 CAN 6 QF VALIDITY 7 TEMP QF INVALID	—
Brake Torque Re R `DI_a194_brakeTorqueReR` 0 VALID 1 RANGE 2 FREEZE 3 RATE 4 QF 5 CAN 6 QF VALIDITY 7 TEMP QF INVALID	—

Check other alerts

With Service Mode Plus enabled, open Service Alerts → All. Review the other alerts for clues to the cause of DI_a194.