DTC U0029-00 (L15B7/L15BA/L15BY: With CAN gateway) (2016 2017 2018 2019)
DTC U0029-00 : CAN Gateway F-CAN ch A Bus Off
NOTE: 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.
-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 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 DTC U0029-00 goes away and the PCM was substituted, replace the original PCM .
- Shorted unit check (gauge control module)
-1. Turn the vehicle to the OFF (LOCK) mode.
-2. Disconnect the following connector.
Gauge control module connector A (32P) -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 (CVT)
Go to step 4.
YES (M/T)
Go to step 5.
NO
Substitute a known-good gauge control module , then recheck. If DTC U0029-00 goes away and the gauge control module was substituted, replace the original gauge control module .
- Shorted unit check (TCM)
-1. Turn the vehicle to the OFF (LOCK) mode.
-2. Jump the SCS line with the HDS.
-3. Disconnect the following connector.
TCM 50P connector -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 5.
NO
Check for any authorized service information related to the DTCs or symptoms you are troubleshooting, or substitute a known-good TCM , then recheck. If DTC U0029-00 goes away and the TCM was substituted, replace the original TCM .
- 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 46P 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 body control module , then recheck. If DTC U0029-00 goes away and the body control module was substituted, replace the original body control module .
- If the original body control module is OK, go to step 6.
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 A_H line)
-1. Turn the vehicle to the OFF (LOCK) mode.
-2. Disconnect the following connector.
CAN gateway 12P connector -3. Check for continuity between test points 1 and 2.
Test condition Vehicle OFF (LOCK) mode PCM connector A (50P): disconnected Gauge control module connector A (32P): disconnected TCM 50P connector (CVT): disconnected VSA modulator-control unit 46P connector: disconnected Body control module connector B (36P): disconnected CAN gateway 12P connector: disconnected Test point 1 CAN gateway 12P 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 short to ground. Go to step 7.
- 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 (50P): disconnected Gauge control module connector A (32P): disconnected TCM 50P connector (CVT): disconnected VSA modulator-control unit 46P connector: disconnected Body control module connector B (36P): disconnected CAN gateway 12P connector: disconnected Test point 1 CAN gateway 12P connector (female terminals) No. 9: 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 short to ground. Go to step 8.
- 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 (50P): disconnected Gauge control module connector A (32P): disconnected TCM 50P connector (CVT): disconnected VSA modulator-control unit 46P connector: disconnected Body control module connector B (36): disconnected CAN gateway 12P connector: disconnected Test point 1 CAN gateway 12P connector (female terminals) No. 3: Test point 2 CAN gateway 12P connector (female terminals) No. 9: 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. 9.
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 DTC U0029-00 goes away and the CAN gateway was substituted, replace the original CAN gateway .