DTC U0029-00 (2019 2020 2021 2022)
DTC U0029-00 : CAN Gateway F-CAN ch A Bus Off
Before you troubleshoot, review the general troubleshooting information .
| DTC Description | DTC |
|---|---|
| U0029-00 CAN Gateway F-CAN ch A 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 U0029-00 CAN Gateway F-CAN ch A Bus Off Is DTC U0029-00 indicated?
YES
Go to step 2.
NO
Intermittent failure, the system is OK at this time.
- 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 (51P) -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 U0029-00 CAN Gateway F-CAN ch A Bus Off Is DTC U0029-00 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 , then recheck. If indicated DTC goes away and the PCM was substituted, replace the original PCM .
- 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 U0029-00 CAN Gateway F-CAN ch A Bus Off Is DTC U0029-00 indicated?
YES
Go to step 4.
NO
Check for any authorized service information related to the DTCs or symptoms you are troubleshooting, or replace the VSA modulator-control unit .
- Shorted unit check (EPS control unit)
-1. Turn the vehicle to the OFF (LOCK) mode.
-2. Disconnect the following connector.
EPS control unit connector A (11P) -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 U0029-00 CAN Gateway F-CAN ch A Bus Off Is DTC U0029-00 indicated?
YES
Go to step 5.
NO
Check for any authorized service information related to the DTCs or symptoms you are troubleshooting, or replace the EPS control unit .
- Shorted unit check (steering angle sensor)
-1. Turn the vehicle to the OFF (LOCK) mode.
-2. Disconnect the following connector.
Steering angle sensor 4P 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 U0029-00 CAN Gateway F-CAN ch A Bus Off Is DTC U0029-00 indicated?
YES
Go to step 6.
NO
Substitute a known-good steering angle sensor , then recheck. If indicated DTC goes away and the steering angle sensor was substituted, replace the original steering angle sensor .
- Shorted unit check (multipurpose camera unit)
-1. Turn the vehicle to the OFF (LOCK) mode.
-2. Disconnect the following connector.
Multipurpose camera 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 U0029-00 CAN Gateway F-CAN ch A Bus Off Is DTC U0029-00 indicated?
YES
Go to step 7.
NO
Check for any authorized service information related to the DTCs or symptoms you are troubleshooting, or substitute a known-good multipurpose camera unit , then recheck. If indicated DTC goes away and the multipurpose camera unit was substituted, replace the original multipurpose camera unit .
- Shorted unit check (SRS unit)
-1. Turn the vehicle to the OFF (LOCK) mode.
-2. Do the 12 volt battery terminal disconnection procedure , and wait for at least 3 minutes.
-3. Disconnect the following connector.
SRS unit connector A (39P) -4. Do the 12 volt battery terminal reconnection procedure .
-5. Turn the vehicle to the ON mode.
-6. Clear the DTC with the HDS.
-7. Turn the vehicle to the OFF (LOCK) mode.
-8. Turn the vehicle to the ON mode, and wait 6 seconds.
-9. Check for DTCs with the HDS.
DTC Description DTC U0029-00 CAN Gateway F-CAN ch A Bus Off Is DTC U0029-00 indicated?
YES
Go to step 8.
NO
Check for any authorized service information related to the DTCs or symptoms you are troubleshooting, or substitute a known-good SRS unit , then recheck. If indicated DTC goes away and the SRS unit was substituted, replace the original SRS unit .
- 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 U0029-00 CAN Gateway F-CAN ch A Bus Off Is DTC U0029-00 indicated?
-
YES
- Check for any authorized service information related to the DTCs or symptoms you are troubleshooting, or substitute a known-good keyless access/TPMS control unit , then recheck.
- If the original keyless access/TPMS control unit is OK, go to step 9.
NO
Substitute a known-good ANC/active sound control unit , then recheck. If indicated DTC goes away and the ANC/active sound control unit was substituted, replace the original ANC/active sound control unit .
-
- Shorted wire check (F-CAN A_H line)
-1. Turn the vehicle to the OFF (LOCK) mode.
-2. Disconnect the following connectors.
Keyless access/TPMS control unit connector C (20P) CAN gateway 16P connector -3. Check for continuity between test points 1 and 2.
Test condition Vehicle OFF (LOCK) mode PCM connector A (51P): disconnected VSA modulator-control unit 21P connector: disconnected EPS control unit connector A (11P): disconnected Steering angle sensor 4P connector: disconnected Multipurpose camera unit 20P connector: disconnected SRS unit connector A (39P): disconnected ANC/active sound control unit 20P connector: disconnected Keyless access/TPMS control unit connector C (20P): disconnected CAN gateway 16P connector: disconnected Test point 1 CAN gateway 16P connector (female terminals) No. 3: Test point 2 Body ground Is there continuity?
YES
Repair a short in the F-CAN A_H wire between the CAN gateway and the connected units.
NO
The F-CAN A_H wire is not shorted to ground. Go to step 10.
- Shorted wire check (F-CAN A_L line)
-1. Check for continuity between test points 1 and 2.
Test condition Vehicle OFF (LOCK) mode PCM connector A (51P): disconnected VSA modulator-control unit 21P connector: disconnected EPS control unit connector A (11P): disconnected Steering angle sensor 4P connector: disconnected Multipurpose camera unit 20P connector: disconnected SRS unit connector A (39P): disconnected ANC/active sound control unit 20P connector: disconnected Keyless access/TPMS control unit connector C (20P): disconnected CAN gateway 16P connector: disconnected Test point 1 CAN gateway 16P connector (female terminals) No. 11: Test point 2 Body ground Is there continuity?
YES
Repair a short in the F-CAN A_L wire between the CAN gateway and the connected units.
NO
The F-CAN A_L wire is not shorted to ground. Go to step 11.
- Shorted wire check (F-CAN A_H line to F-CAN A_L line)
-1. Check for continuity between test points 1 and 2.
Test condition Vehicle OFF (LOCK) mode PCM connector A (51P): disconnected VSA modulator-control unit 21P connector: disconnected EPS control unit connector A (11P): disconnected Steering angle sensor 4P connector: disconnected Multipurpose camera unit 20P connector: disconnected SRS unit connector A (39P): disconnected ANC/active sound control unit 20P connector: disconnected Keyless access/TPMS control unit connector C (20P): disconnected CAN gateway 16P connector: disconnected Test point 1 CAN gateway 16P connector (female terminals) No. 3: Test point 2 CAN gateway 16P connector (female terminals) No. 11: Is there continuity?
YES
Repair a short in the F-CAN A_H wire to the F-CAN A_L wire between CAN gateway terminals No. 3 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 , then recheck. If indicated DTC goes away and the CAN gateway was substituted, replace the original CAN gateway .