[ Model - ECLIPSE CROSS / Year - 2018 ]
2018 / ECLIPSE CROSS / EC - Workshop Manual
35 -SERVICE BRAKES > 35C-ACTIVE STABILITY CONTROL SYSTEM (ASC) > TROUBLESHOOTING<ASC-ECU><ASC-ECU> > SYMPTOM PROCEDURES > ASC INDICATOR LAMP STAYS ON AFTER THE ENGINE IS STARTED.
Inspection Procedure 7: ASC warning lamp stays ON after the engine is started.
 
 
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-ECU sends the illumination request signal of the ASC warning lamp to the combination meter through ETACS-ECU via the CAN communication.
 
 
 
COMMENTS ON TROUBLE SYMPTOM
This may be caused by faults in the CAN bus line, ETACS-ECU, combination meter or ASC-ECU.
 
 
 
PROBABLE CAUSES
  • Damaged wiring harness and connectors
  • Malfunction of ETACS-ECU
  • Combination meter malfunction
  • ASC-ECU malfunction
  • Control is disabled due to the low voltage
    noteDue to the abnormality in the supply voltage, the diagnosis code may not be set even when the ASC lamp illuminates.
 
 
 
 
DIAGNOSIS PROCEDURE
STEP 1. M.U.T.-IIISE CAN bus diagnosis
Use 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. M.U.T.-IIISE diagnosis code
Use M.U.T.-IIISE to check the diagnosis code for the ASC system.
Is the diagnosis code set?
Carry out the diagnosis for the diagnosis code (Refer to ).
Go to Step 3.
 
STEP 3. M.U.T.-IIISE Special Function for other system
Perform the following special function by the combination meter system, and check if the ASC warning lamp illuminates (Refer to GROUP 54A - Combination Meter ).
  • Item 2: LCD (AUTO)
  • Item 6: Indicator (AUTO)
Is the check result normal?
Go to Step 4.
Replace the combination meter (Refer to GROUP 54A - Combination meter ).
 
STEP 4. Check the ASC-ECU power supply circuit system.
Refer to .
Is the check result normal?
Go to Step 5.
Diagnose the power supply circuit of the ASC-ECU (Refer to ).
 
STEP 5. M.U.T.-IIISE other system diagnosis code
Using M.U.T.-IIISE, check that diagnosis code No.U0141 is not set in the combination meter system.
Is the diagnosis code set?
Diagnose the combination meter (Refer to GROUP 54A - Combination Meter/Diagnosis Code ).
Go to Step 6.
 
STEP 6. M.U.T.-IIISE other system diagnosis code
Using M.U.T.-IIISE, check that diagnosis code No.U0121 is not set in the ETACS system.
Is the diagnosis code set?
Perform troubleshooting on ETACS-ECU (Refer to GROUP 54A - ETACS/Diagnosis Code ).
Go to Step 7.
 
STEP 7. Retest the system.
Does the ASC warning lamp turn ON and OFF normally?
Intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/How to Cope with Intermittent Malfunctions ).
Replace the hydraulic unit (integrated with ASC-ECU) (Refer to ).