DTC U0047-00 (VSA Control Unit (Without CAN Gateway)) (2017 2018 2019)
DTC U0047-00 : CAN Communication Failure (Bus OFF Ch 2)
NOTE: Before you troubleshoot, review the general troubleshooting information .
| DTC Description | DTC | Freeze Frame |
|---|---|---|
| U0047-00 CAN Communication Failure (Bus OFF Ch 2) |
DTC (VSA)
- 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 start the engine.
-4. Check for DTCs with the HDS.
DTC Description DTC Freeze Frame U0047-00 CAN Communication Failure (Bus OFF Ch 2) Is DTC U0047-00 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.
- EBB CAN circuit resistance 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. Disconnect the following connector.
VSA modulator-control unit 46P connector -4. Measure the resistance between test points 1 and 2.
Test condition Vehicle OFF (LOCK) mode VSA modulator-control unit 46P connector: disconnected Test point 1 VSA modulator-control unit 46P connector No. 46 Test point 2 VSA modulator-control unit 46P connector No. 34 Is there about 108-132 Ω ?
YES
Go to step 5.
NO
Go to step 3.
- Shorted wire check (EBB CAN H line to EBB CAN L line)
-1. Disconnect the following connector.
Electric brake booster 26P connector -2. Check for continuity between test points 1 and 2.
Test condition Vehicle OFF (LOCK) mode VSA modulator-control unit 46P connector: disconnected Electric brake booster 26P connector: disconnected Test point 1 VSA modulator-control unit 46P connector No. 46 Test point 2 VSA modulator-control unit 46P connector No. 34 Is there continuity?
YES
Repair a short in the wires between the VSA modulator-control unit terminals 46 and 34.
NO
Go to step 4.
- Open wire check (EBB CAN H, EBB CAN L lines)
-1. Check for continuity between test points 1 and 2.
Test condition Vehicle OFF (LOCK) mode VSA modulator-control unit 46P connector: disconnected Electric brake booster 26P connector: disconnected Test circuit 1 Test point 1 VSA modulator-control unit 46P connector No. 46 Test point 2 Electric brake booster 26P connector No. 19 Test circuit 2 Test point 1 VSA modulator-control unit 46P connector No. 34 Test point 2 Electric brake booster 26P connector No. 12 Is there continuity?
YES
The EBB CAN H, EBB CAN L wires are OK. Check for loose terminals and poor connections in the electric brake booster 26P connector. If they are OK, replace the electric brake booster .
NO
Repair an open in the wire between the VSA modulator-control unit and the electric brake booster.
- Shorted wire check (EBB CAN H, EBB CAN L lines)
-1. Disconnect the following connector.
Electric brake booster 26P connector -2. Check for continuity between test points 1 and 2.
Test condition Vehicle OFF (LOCK) mode VSA modulator-control unit 46P connector: disconnected Electric brake booster 26P connector: disconnected Test circuit 1 Test point 1 VSA modulator-control unit 46P connector No. 46 Test point 2 Body ground Test circuit 2 Test point 1 VSA modulator-control unit 46P connector No. 34 Test point 2 Body ground Is there continuity?
YES
Repair a short to ground in the wire between the VSA modulator-control unit and the electric brake booster.
NO
The EBB CAN H, EBB CAN L wires are OK. Check for loose terminals and poor connections in the VSA modulator-control unit 46P connector. Check for any authorized service information related to the DTCs or symptoms you are troubleshooting. If they are OK, replace the VSA modulator-control unit .