Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
DTC B2A10-14
DTC B2A10-14 : Brake Light Drive Relay Circuit Malfunction
NOTE: Before you troubleshoot, review the general troubleshooting information .
| DTC Description | DTC | Freeze Frame |
|---|---|---|
| B2A10-14 Brake Light Drive Relay Circuit Malfunction |
DTC (IDAS)
- VSA system DTC check
-1. Turn the vehicle to the ON mode.
-2. Check for DTCs with the HDS.
DTC Description DTC Are any DTCs indicated?
YES
Go to the indicated DTC's troubleshooting .
NO
Go to step 2.
- Problem verification
-1. Clear the DTC with the HDS.
-2. Turn the vehicle to the OFF (LOCK) mode, then the ON mode.
Select the Integrated Driver Support system in the DRIVING SUPPORT menu, then select the Brake Light in the Function Test.
Brake Light
Function test under these conditions:
- Shift the transmission to P position/mode
- Start the engine
- Release the brake pedal
- Press the MAIN switch is ON (ACC combination switch)
-4. Do the brake light relay function test.
-5. Check for DTCs with the HDS.
DTC Description DTC Freeze Frame B2A10-14 Brake Light Drive Relay Circuit Malfunction Is DTC B2A10-14 indicated?
YES
The failure is duplicated. Check for loose terminals and poor connections in the multipurpose camera unit 20P connector. Check for any authorized service information related to the DTCs or symptoms you are troubleshooting. If they are OK, replace the multipurpose camera unit .
NO
Intermittent failure, the system is OK at this time. Refer to intermittent failures troubleshooting . If the freeze data/on-board snapshot of this DTC is recorded, try to reproduce the failure under the same conditions with the freeze data/on-board snapshot.
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.