DTC Troubleshooting: 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
    

1.
VSA system DTCs check:

VSA system DTCs check
?1.
Turn the vehicle to the ON mode.

?2.
Check for VSA system DTCs with the HDS.
DTC Description
DTC
Freeze Frame
     

Are any DTCs indicated?

     
YES
     
     
     
     
NO
     
     
     
Go to step 2.
2.
Problem verification:

Problem verification
?1.
Clear the DTC with the HDS.


?2.
Turn the vehicle to the OFF (LOCK) mode, then the ON mode.

?3.
Select ADAPTIVE CRUISE CONTROL (ACC) from the DRIVING SUPPORT menu, then enter ACC RELAY from the FUNCTION TEST menu.

?4.
Do the brake light relay function test with the HDS.

  

?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
     
     
     
Check for loose terminals and poor connections in the multipurpose camera unit 20P connector. 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.?