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DTC U0317: CAN time-out error (EPB)
 
 
 
 
DIAGNOSTIC FUNCTION
The AWC-ECU determines that the system is defective if the TCM can receive no CAN communication information from the electric parking brake ECU.
 
 
DTC SET CONDITIONS
Judgment Criteria
  • No information is received from the electric parking brake ECU for 0.55 seconds.
 
 
PROBABLE CAUSES
  • Malfunction of the CAN bus line
  • Malfunction of electric parking brake ECU
  • Malfunction of AWC-ECU
 
 
DIAGNOSIS
STEP 1. M.U.T.-III CAN bus diagnostics
Use M.U.T.-III to perform the CAN bus diagnosis.
Is the check result normal?
Go to Step 2.
Repair the CAN bus lines (Refer to GROUP 54C - Diagnosis, CAN Bus Diagnostics Table ).
 
STEP 2. M.U.T.-III diagnostic trouble code
Check if the EPB-related diagnostic trouble code is set.
Is the EPB-related diagnostic trouble code set?
Carry out the appropriate troubleshooting.
Go to Step 3.
 
STEP 3. M.U.T.-III diagnostic trouble code
Is DTC U0317 set in the other ECU, which communicates with the electric parking brake ECU via CAN?
Is the diagnostic trouble code set?
Go to Step 4.
Go to Step 5.
 
STEP 4. Symptom recheck after erasing diagnostic trouble code
Is the diagnostic trouble code set?
Replace electric parking brake ECU.
Intermittent malfunction.
 
STEP 5. Symptom recheck after erasing diagnostic trouble code
Is the diagnostic trouble code set?
Replace AWC-ECU.
Intermittent malfunction.