DTC U3000-51 (Electric Brake Booster Control Unit)

DTC U3000-51  : ECU Software Update Failure

NOTE: 

• Before you troubleshoot, review the general troubleshooting information .
• Do not turn the vehicle to the OFF (LOCK) mode while updating the electric brake booster. If you turn the vehicle to the OFF (LOCK) mode before completion, the electric brake booster will be damaged.

DTC (Electric brake booster)

1. Problem verification

   -1. Turn the vehicle to the ON mode.

   -2. Clear the DTC with the HDS.

   -3. Turn the vehicle to the OFF (LOCK) mode, then wait 5 seconds or more.

   NOTE:  Do not open and close the driver's door.

   -4. Turn the vehicle to the ON mode.

   -5. Check for DTCs with the HDS.

   DTC Description	DTC	Freeze Frame
   U3000-51 ECU Software Update Failure

   Is DTC U3000-51 indicated?

   YES 

   The failure is duplicated. Go to step 2.

   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.

2. Electric brake booster check (update)

   -1. Update the electric brake booster .

   -2. Turn the vehicle to the OFF (LOCK) mode, then wait 5 seconds or more.

   NOTE:  Do not open and close the driver's door.

   -3. Turn the vehicle to the ON mode.

   -4. Check for DTCs with the HDS.

   DTC Description	DTC	Freeze Frame

   Is DTC U3000-51 indicated?

   YES 

   Check for loose terminals and poor connections in the electric brake booster 26P connector. Check for any authorized service information related to the DTCs or symptoms you are troubleshooting. If they are OK, replace the electric brake booster .

   NO 

   Troubleshooting is complete. If any other DTCs are indicated, go to the indicated DTCs troubleshooting.