DI_a223 — Traction Control Disabled

Full alert identifier: DI_a223_tractionControlDisabled

Message shown in the car

Traction control disabled Drive with caution

Alert description

Drive Inverter Warning: Traction control (TC) is disabled

Potential impact

Traction control is not available. The vehicle should be driven with extreme caution.

Set condition

This alert sets any time traction control is not available. This is almost always due to the system being faulted. To diagnose the cause of the fault, check this alert's payload to identify which inputs are in a degraded state. <br>Steps to find cause:<br>1) If velocityEstimatorState is degraded, check other DI alert for velocityEstimatorState to find the root cause. If velocityEstimatorState is normal: <br>2) If btcTargetState or ptcTargetState are degraded, check for CAN bus issues (these signals come from ESP) or sensor issues with ESP (check associated ESP alerts). If target states are normal: <br>3) If addState is degraded, check for other DI alerts about ADD. If slaveADDState is degraded, check for DIS alerts about ADD and check for other DI alerts indicating CAN communication issues with DIS.

Clear condition

This alert will clear on the drive cycle after traction control is re-enabled or un-faulted.

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
Musurf `DI_a223_musurf`	—
Musurf High `DI_a223_musurfHigh`	—
Surface Utility `DI_a223_surfaceUtility`	%
Vehicle Velocity `DI_a223_vehicleVelocity`	m/s

Signal	Unit
DI Traction Control Mode `DI_a223_DI_tractionControlMode` 0 NORMAL 1 SLIP START 2 DEV MODE 1 3 DEV MODE 2 4 ROLLS MODE 5 DYNO MODE 6 OFFROAD ASSIST 7 SLIPPERY SURFACE	—
UI Traction Control Mode `DI_a223_UI_tractionControlMode` 0 NORMAL SELECTED 1 SLIP START SELECTED 2 DEV MODE 1 SELECTED 3 DEV MODE 2 SELECTED 4 ROLLS MODE SELECTED 5 DYNO MODE SELECTED 6 OFFROAD ASSIST SELECTED 7 SLIPPERY SURFACE SELECTED	—
Add State Dif `DI_a223_addState_dif` 0 STARTUP 1 NORMAL 2 BACKUP 3 FAULTED	—
Add State Dir `DI_a223_addState_dir` 0 STARTUP 1 NORMAL 2 BACKUP 3 FAULTED	—
Add State Direl `DI_a223_addState_direl` 0 STARTUP 1 NORMAL 2 BACKUP 3 FAULTED	—
Add State Direr `DI_a223_addState_direr` 0 STARTUP 1 NORMAL 2 BACKUP 3 FAULTED	—
Btc State `DI_a223_btcState` 0 OFF 1 ON	—
Drive TC Active `DI_a223_driveTCActive` 0 INACTIVE 1 ACTIVE	—

Show 3 more fields

Signal	Unit
Ptc State Local `DI_a223_ptcStateLocal` 0 FAULTED 1 BACKUP 2 WHEELS REDUCED 3 ADD REDUCED 4 ON 5 STARTUP 6 SNA	—
Regen TC Active `DI_a223_regenTCActive` 0 INACTIVE 1 ACTIVE	—
Velocity Estimator State `DI_a223_velocityEstimatorState` 0 NOT INITIALIZED 1 WHEELS NORMAL 2 WHEELS REDUCED 3 BACKUP WHEELS A 4 BACKUP WHEELS B 5 BACKUP MOTOR	—

Check other alerts

With Service Mode Plus enabled, open Service Alerts → All. Review the other alerts for clues to the cause of DI_a223.