DTC U3003-16 (Electric Servo Brake Control Unit)
DTC U3003-16 : Electric Servo Brake Control Unit Power Source Circuit (+B) Low Voltage
NOTE: Before you troubleshoot, review the general troubleshooting information .
| DTC Description | DTC | Freeze Frame |
|---|---|---|
| U3003-16 Electric Servo Brake Control Unit Power Source Circuit (+B) Low Voltage |
DTC (Electric servo brake)
- Problem verification
-1. Turn the vehicle to the ON mode.
-2. Clear the DTCs with the HDS.
-3. Turn the vehicle to the OFF (LOCK) mode, then to the READY TO DRIVE mode.
-4. Wait 10 seconds or more.
-5. Check for DTCs with the HDS.
DTC Description DTC Freeze Frame U3003-16 Electric Servo Brake Control Unit Power Source Circuit (+B) Low Voltage Is DTC U3003-16 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.
- Fuse check
-1. Turn the vehicle to the OFF (LOCK) mode with driver's door open.
-2. Wait for 3 minutes.
NOTE: Do not close the driver's door.
-3. Check the following fuse.
Fuse No. A1-2 Is the fuse OK?
YES
The fuse is OK. Reinstall the fuse, then go to step 3.
NO
Replace the fuse. If the fuse blows again, repair a short to ground in the No. A1-2 fuse circuit.
- Open wire check (+B_ESB line)
-1. Disconnect the following connector.
Electric servo brake control unit 22P connector -2. Measure the voltage between test points 1 and 2.
Test condition Vehicle OFF (LOCK) mode Electric servo brake control unit 22P connector: disconnected Test point 1 Electric servo brake control unit 22P connector No. 5 Test point 2 Body ground Is there battery voltage?
YES
Check for loose terminals and poor connections in the electric servo brake control unit 22P connector. Check for any authorized service information related to the DTCs or symptoms you are troubleshooting. If they are OK, replace the electric servo brake control unit/pedal feel simulator .
NO
Repair an open in the wire between the No. A1-2 fuse and the electric servo brake control unit.