DTC U0047-00: CAN Gateway F-CAN ch B Bus Off (2017)
NOTICE:
Marked with
, always use insulated tools, and wrap the items with insulating tape.
NOTE: Before you troubleshoot, review the general troubleshooting information - Refer to: How to Troubleshoot the Fuel and Emissions Systems (2017) .
| DTC Description | DTC |
|---|---|
| U0047-00 CAN Gateway F-CAN ch B Bus Off |
DTC (CAN GATEWAY)
- 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.
- 4. Turn the vehicle to the ON mode, and wait 6 seconds.
- 5. Check for DTCs with the HDS.
DTC Description DTC U0047-00 CAN Gateway F-CAN ch B Bus Off Is DTC U0047-00 indicated?
YES
Go to step 2.
NO
Intermittent failure, the system is OK at this time. If the on-board snapshot of this DTC is recorded, try to reproduce the failure under the same conditions with the on-board snapshot - Refer to: How to Troubleshoot the Fuel and Emissions Systems (2017) .
- Shorted unit check (PCM)
-1. Turn the vehicle to the OFF (LOCK) mode.
- 2. Jump the SCS line with the HDS, and wait more than 1 minute.
- 3. Disconnect the following connector.
PCM connector A (50P) - 4. Turn the vehicle to the ON mode.
- 5. Clear the DTC with the HDS.
- 6. Turn the vehicle to the OFF (LOCK) mode.
- 7. Turn the vehicle to the ON mode, and wait 6 seconds.
- 8. Check for DTCs with the HDS.
DTC Description DTC U0047-00 CAN Gateway F-CAN ch B Bus Off Is DTC U0047-00 indicated?
YES
Go to step 3.
NO
Check for any authorized service information related to the DTCs or symptoms you are troubleshooting, or substitute a known-good PCM - Refer to: PCM Removal and Installation (2017) , then recheck. If DTC U0047-00 goes away and the PCM was substituted, replace the original PCM - Refer to: PCM Removal and Installation (2017) .
- Shorted unit check (electric servo brake control unit)
-1. Turn the vehicle to the OFF (LOCK) mode.
- 2. Disconnect the following connector.
NOTE: Before disconnecting the electric servo brake control unit connector, open the driver's door and wait for at least 3 minutes.
Electric servo brake control unit 22P connector - 3. Turn the vehicle to the ON mode.
- 4. Clear the DTC with the HDS.
- 5. Turn the vehicle to the OFF (LOCK) mode.
- 6. Turn the vehicle to the ON mode, and wait 6 seconds.
- 7. Check for DTCs with the HDS.
DTC Description DTC U0047-00 CAN Gateway F-CAN ch B Bus Off Is DTC U0047-00 indicated?
YES
Go to step 4.
NO
Check for any authorized service information related to the DTCs or symptoms you are troubleshooting, or substitute a known-good electric servo brake control unit - Refer to: Electric Servo Brake Control Unit/Pedal Feel Simulator Removal and Installation (2017) , then recheck. If DTC U0047-00 goes away and the electric servo brake control unit was substituted, replace the original electric servo brake control unit - Refer to: Electric Servo Brake Control Unit/Pedal Feel Simulator Removal and Installation (2017) .
- Shorted unit check (ANC/active sound control unit)
-1. Turn the vehicle to the OFF (LOCK) mode.
- 2. Disconnect the following connector.
ANC/active sound control unit 20P connector - 3. Turn the vehicle to the ON mode.
- 4. Clear the DTC with the HDS.
- 5. Turn the vehicle to the OFF (LOCK) mode.
- 6. Turn the vehicle to the ON mode, and wait 6 seconds.
- 7. Check for DTCs with the HDS.
DTC Description DTC U0047-00 CAN Gateway F-CAN ch B Bus Off Is DTC U0047-00 indicated?
YES
Go to step 5.
NO
Check for any authorized service information related to the DTCs or symptoms you are troubleshooting, or substitute a known-good ANC/active sound control unit , then recheck. If DTC U0047-00 goes away and the ANC/active sound control unit was substituted, replace the original ANC/active sound control unit .
- Shorted unit check (acoustic vehicle alerting control unit)
-1. Turn the vehicle to the OFF (LOCK) mode.
- 2. Disconnect the following connector.
Acoustic vehicle alerting control unit 12P connector - 3. Turn the vehicle to the ON mode.
- 4. Clear the DTC with the HDS.
- 5. Turn the vehicle to the OFF (LOCK) mode.
- 6. Turn the vehicle to the ON mode, and wait 6 seconds.
- 7. Check for DTCs with the HDS.
DTC Description DTC U0047-00 CAN Gateway F-CAN ch B Bus Off Is DTC U0047-00 indicated?
YES
Go to step 6.
NO
Check for any authorized service information related to the DTCs or symptoms you are troubleshooting, or substitute a known-good acoustic vehicle alerting control unit , then recheck. If DTC U0047-00 goes away and the acoustic vehicle alerting control unit was substituted, replace the original acoustic vehicle alerting control unit .
- Shorted unit check (VSA modulator-control unit)
-1. Turn the vehicle to the OFF (LOCK) mode.
- 2. Disconnect the following connector.
VSA modulator-control unit 21P connector - 3. Turn the vehicle to the ON mode.
- 4. Clear the DTC with the HDS.
- 5. Turn the vehicle to the OFF (LOCK) mode.
- 6. Turn the vehicle to the ON mode, and wait 6 seconds.
- 7. Check for DTCs with the HDS.
DTC Description DTC U0047-00 CAN Gateway F-CAN ch B Bus Off Is DTC U0047-00 indicated?
YES
Go to step 7.
NO
Check for any authorized service information related to the DTCs or symptoms you are troubleshooting, or replace the VSA modulator-control unit .
- Shorted wire check (F-CAN B_H line)
-1. Turn the vehicle to the OFF (LOCK) mode.
- 2. Disconnect the following connector.
CAN gateway 24P connector - 3. Check for continuity between test points 1 and 2.
Test condition Vehicle OFF (LOCK) mode PCM connector A (50P): disconnected Electric servo brake control unit 22P connector: disconnected ANC/active sound control unit 20P connector: disconnected Acoustic vehicle alerting control unit 12P connector: disconnected VSA modulator-control unit 21P connector: disconnected Keyless access control unit connector C (24P): disconnected CAN gateway 24P connector: disconnected Test point 1 CAN gateway 24P connector No. 11 Test point 2 Body ground Is there continuity?
YES
Repair a short in the F-CAN B_H wire between the CAN gateway and the connected units.
NO
Go to step 8.
- Shorted wire check (F-CAN B_L line)
-1. Check for continuity between test points 1 and 2.
Test condition Vehicle OFF (LOCK) mode PCM connector A (50P): disconnected Electric servo brake control unit 22P connector: disconnected ANC/active sound control unit 20P connector: disconnected Acoustic vehicle alerting control unit 12P connector: disconnected VSA modulator-control unit 21P connector: disconnected Keyless access control unit connector C (24P): disconnected CAN gateway 24P connector: disconnected Test point 1 CAN gateway 24P connector No. 10 Test point 2 Body ground Is there continuity?
YES
Repair a short in the F-CAN B_L wire between the CAN gateway and the connected units.
NO
Go to step 9.
- Shorted wire check (F-CAN B_H line to F-CAN B_L line)
-1. Check for continuity between test points 1 and 2.
Test condition Vehicle OFF (LOCK) mode PCM connector A (50P): disconnected Electric servo brake control unit 22P connector: disconnected ANC/active sound control unit 20P connector: disconnected Acoustic vehicle alerting control unit 12P connector: disconnected VSA modulator-control unit 21P connector: disconnected Keyless access control unit connector C (24P): disconnected CAN gateway 24P connector: disconnected Test point 1 CAN gateway 24P connector No. 10 Test point 2 CAN gateway 24P connector No. 11 Is there continuity?
YES
Repair a short in the F-CAN B_H wire to F-CAN B_L wire between CAN gateway terminals No. 10 and No. 11.
NO
Check for any authorized service information related to the DTCs or symptoms you are troubleshooting, or substitute a known-good CAN gateway - Refer to: CAN Gateway Removal and Installation (2017) , then recheck. If DTC U0047-00 goes away and the CAN gateway was substituted, replace the original CAN gateway - Refer to: CAN Gateway Removal and Installation (2017) . If DTC U0047-00 is indicated again, replace the keyless access control unit .