[ Model - ECLIPSE CROSS / Year - 2018 ]
2018 / ECLIPSE CROSS / EC - Workshop Manual
36 -PARKING BRAKE > TROUBLESHOOTING<ELECTRIC PARKING BRAKE><ELECTRIC PARKING BRAKE> > DIAGNOSIS CODE PROCEDURES > CODE No. U0415 ABS/ASC (CAN MESSAGE)
Code No. U0415: ABS/ASC (CAN message)
 
 
caution
  • If there is any problem in the CAN bus lines, an incorrect diagnosis code may be set. Prior to this diagnosis, diagnose the CAN bus lines (Refer to GROUP 54C - CAN Bus Diagnostics Table ).
  • Whenever ECU is replaced, ensure that the CAN bus lines are normal.
 
 
OPERATION
ASC-related signals are sent or received between the electric parking brake ECU and the ASC-ECU via CAN bus lines.
 
 
DIAGNOSIS CODE SET CONDITIONS
The diagnosis code will be set under any of the following conditions:
  • The system receives an invalid longitudinal G-sensor signal.
  • The system detects an implausible longitudinal G-sensor signal.
  • The system receives an invalid road wheel speed sensor signal.
  • The system detects an implausible road wheel speed sensor signal.
  • The system receives an invalid brake fluid pressure sensor signal.
  • The system detects an implausible brake fluid pressure sensor signal.
  • The system detects an implausible electric parking brake request signal.
  • The system detects that the emergency brake function fails.
 
 
PROBABLE CAUSES
  • The ASC system fails
    • Power supply voltage
    • Longitudinal G-sensor
    • wheel speed sensor
    • Brake fluid pressure sensor
    • Emergency brake function
  • The CAN bus line is defective (noise interference).
  • Malfunction of the electric parking brake ECU
 
 
DIAGNOSIS PROCEDURE
STEP 1. M.U.T.-IIISE CAN bus diagnosis
Use the M.U.T.-IIISE to diagnose the CAN bus lines.
Is the check result normal?
Go to Step 2.
Repair the CAN bus lines (Refer to GROUP 54C - CAN Bus Diagnostics Table ).
 
STEP 2. Use M.U.T.-IIISE to confirm a diagnosis code of other systems.
Use M.U.T.-IIISE to check that any diagnosis code other than code No. U0415 is set in electric parking brake ECU.
Is the diagnosis code set?
Troubleshoot the relevant diagnosis code (Refer to ).
Go to Step 3.
 
STEP 3. Use M.U.T.-IIISE to confirm a diagnosis code of other systems.
Use M.U.T.-IIISE to check that any diagnosis code other than code No. U0417 is set in ASC-ECU.
Is the diagnosis code set?
Troubleshoot the ASC-ECU diagnosis code (Refer to GROUP 35C - Diagnosis Code Chart ).
Go to Step 4.
 
STEP 4. Check whether the diagnosis code is set again.
Check again if the diagnosis code is set.
(1) Erase the diagnosis code.
(2) Turn the ignition switch to the LOCK (OFF) position.
(3) Turn the ignition switch to the ON position.
(4) Check if the diagnosis code is set.
Is diagnosis code No. U0415 set?
Go to Step 5.
The trouble can be an intermittent malfunction (Refer to GROUP 00 - How to Cope with Intermittent Malfunction ).
 
STEP 5. M.U.T.-IIISE other system data list.
Check the ASC-ECU data list (Refer to GROUP 35C - Data List Reference Table ).
 
Item No.Item nameNormal condition
34A.S.C. dynamic brake failNormal
OK: Normal condition is displayed.
Is the check result normal?
Go to Step 6.
Replace the electric parking brake ECU (Refer to ).
 
STEP 6. M.U.T.-IIISE other system data list.
Check the ASC-ECU data list (Refer to GROUP 35C - Data List Reference Table ).
 
Item No.Item nameNormal condition
31EPB fail stateNormal
OK: Normal condition is displayed.
Is the check result normal?
The trouble can be an intermittent malfunction (Refer to GROUP 00 - How to Cope with Intermittent Malfunction ).
Replace the hydraulic unit assembly (integrated with ASC-ECU) (Refer to GROUP 35C - Hydraulic Unit ).