HDS does not communicate with the VSA modulator-control unit or the vehicle

Troubleshoot the F-CAN circuit.

Faulty data link cable

Brake system indicator (amber) does not come on

Do the gauge control module self-diagnostic function.

Brake system indicator (red) indicator does not come on

Symptom troubleshooting.

Brake system indicator (red) indicator does not go off

Symptom troubleshooting.