Circuit/System Verification

Ignition ON.
Apply and release brake pedal. Verify the brake stop lamps operate properly.
- If the brake stop lamps do not operate properly
  Refer to Symptoms - Lighting .
- Go to next step: If the brake stop lamps operate properly
Verify that DTC C0131 is not set.
- If the DTC is set
  Replace K17 Electronic Brake Control Module.
- Go to next step: If the DTC is not set
All OK.