Electric Brake Booster System Symptom Troubleshooting Index

When the vehicle has one of these symptoms, check for electric brake booster diagnostic trouble codes (DTCs) with the HDS. If there are no DTCs, do the diagnostic procedure for the symptom, in the sequence listed, until you find the cause.

Symptom	Diagnostic procedure	Also check for
HDS does not communicate with the electric brake booster or the vehicle	Troubleshoot the F-CAN circuit.	Power and ground at the electric brake booster.
Brake system indicator (red) or brake system indicator (amber) does not come on at start-up (bulb check)	Do the gauge control module self-diagnostic function.
Brake system indicator (red) and brake system indicator (amber) do not go off	Symptom troubleshooting.