DTC U0038 (98) (Motor Control Module)
DTC U0038 : EP-CAN Malfunction (Traction Motor Control Module Bus-Off)
NOTE: Before you troubleshoot, review the general troubleshooting information .
| DTC Description | Confirmed DTC | Pending DTC | Freeze Frame |
|---|---|---|---|
| U0038 EP-CAN Malfunction (Traction Motor Control Module Bus-Off) |
DTC (Electric Powertrain)
- 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 Pending or Confirmed DTCs with the HDS.
DTC Description Confirmed DTC Pending DTC Freeze Frame U0038 EP-CAN Malfunction (Traction Motor Control Module Bus-Off) Is DTC U0038 indicated?
YES
The failure is duplicated. Go to step 2.
NO
Intermittent failure. The system is OK at this time. 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.
- 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 Pending or Confirmed DTCs with the HDS.
DTC Description Confirmed DTC Pending DTC Freeze Frame U0038 EP-CAN Malfunction (Traction Motor Control Module Bus-Off) Is DTC U0038 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 .
- Shorted unit check (battery condition monitor module)
-1. Turn the vehicle to the OFF (LOCK) mode.
-2. Remove the service plug and the IPU cover .
-3. Disconnect the following connector.
Battery condition monitor module connector E (32P) -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 Pending or Confirmed DTCs with the HDS.
DTC Description Confirmed DTC Pending DTC Freeze Frame U0038 EP-CAN Malfunction (Traction Motor Control Module Bus-Off) Is DTC U0038 indicated?
YES
Go to step 4.
NO
- Shorted unit check (SBW shifter control module)
-1. Turn the vehicle to the OFF (LOCK) mode.
-2. Disconnect the following connector.
SBW shifter control module 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 Pending or Confirmed DTCs with the HDS.
DTC Description Confirmed DTC Pending DTC Freeze Frame U0038 EP-CAN Malfunction (Traction Motor Control Module Bus-Off) Is DTC U0038 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 SBW shifter assembly .
- Shorted unit check (park pawl actuator driver unit)
-1. Turn the vehicle to the OFF (LOCK) mode.
-2. Disconnect the following connector.
Park pawl actuator driver unit 26P 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 Pending or Confirmed DTCs with the HDS.
DTC Description Confirmed DTC Pending DTC Freeze Frame U0038 EP-CAN Malfunction (Traction Motor Control Module Bus-Off) Is DTC U0038 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 park pawl actuator driver unit .
- Shorted wire check (EP-CAN A_H line)
-1. Turn the vehicle to the OFF (LOCK) mode.
-2. Do the 12 volt battery terminal disconnection procedure .
-3. Disconnect the following connector.
PCU 33P connector -4. Check for continuity between test points 1 and 2.
Test condition Vehicle OFF (LOCK) mode PCM connector A (50P): disconnected Battery condition monitor module connector E (32P): disconnected PCU 33P connector: disconnected SBW shifter control module 20P connector: disconnected Park pawl actuator driver unit 26P connector: disconnected Test point 1 PCU 33P connector No. 27 Test point 2 Body ground Is there 1 MΩ or more?
YES
Go to step 7.
NO
Repair a short in the EP-CAN A_H wire between the PCM, the battery condition monitor module, the SBW shifter control module, the park pawl actuator driver unit, and the PCU.
- Shorted wire check (EP-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 Battery condition monitor module connector E (32P): disconnected PCU 33P connector: disconnected SBW shifter control module 20P connector: disconnected Park pawl actuator driver unit 26P connector: disconnected Test point 1 PCU 33P connector No. 28 Test point 2 Body ground Is there 1 MΩ or more?
YES
Go to step 8.
NO
Repair a short in the EP-CAN A_L wire between the PCM, the battery condition monitor module, the SBW shifter control module 20P connector, the Park pawl actuator driver unit 26P connector, and the PCU.
- Shorted wire check (EP-CAN A_H wire to EP-CAN A_L wire)
-1. Check for continuity between test points 1 and 2.
Test condition Vehicle OFF (LOCK) mode PCM connector A (50P): disconnected Battery condition monitor module connector E (32P): disconnected PCU 33P connector: disconnected SBW shifter control module 20P connector: disconnected Park pawl actuator driver unit 26P connector: disconnected Test point 1 PCU 33P connector No. 27 Test point 2 PCU 33P connector No. 28 Is there 1 MΩ or more?
YES
The EP-CAN A_H wire and the EP-CAN A_L wire are OK. Replace the PCU .
NO
Repair a short in the EP-CAN A_H wire to the EP-CAN A_L wire between the PCM, the battery condition monitor module, the SBW shifter control module, the park pawl actuator driver unit, and the PCU.