[ 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 > BRAKE WARNING LAMP STAYS ON WITH THE PARKING BRAKE LEVER RELEASED.
Inspection Procedure 3: The brake warning lamp does not go out (ABS warning lamp is OFF) although the parking brake is released.
 
 
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
  • The combination meter illuminates the brake warning lamp when the parking brake is applied.
  • When reduction of the brake fluid amount is detected, the brake fluid level switch is turned from ON to OFF. ETACS-ECU monitors the brake fluid level switch, and instructs the combination meter via the CAN bus line to illuminate the brake warning lamp.
 
 
 
PROBABLE CAUSES
  • The brake pad thickness is at the limit value or less.
  • The brake fluid amount is at the "LOWER" level or lower.
  • Parking brake malfunction
  • Damaged wiring harness and connectors
  • Malfunction of brake fluid level switch
  • Combination meter malfunction
  • Malfunction of ETACS-ECU
  • Malfunction of electric parking brake ECU
 
 
 
 
DIAGNOSIS PROCEDURE
STEP 1. M.U.T.-IIISE CAN bus diagnostics
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. Use M.U.T.-IIISE to confirm a diagnosis code of other systems.
Use M.U.T.-IIISE to check that the diagnosis code is set in the combination meter, ETACS-ECU or electric parking brake ECU.
Is the diagnosis code set?
Carry out the diagnosis for the diagnosis code.
Go to Step 3.
 
STEP 3. Brake fluid level check
Check that the brake fluid is filled up to the "MIN" level or higher.
Is the check result normal?
Go to Step 5.
Go to Step 4.
 
STEP 4. Brake pad check
Refer to GROUP 35A - On-vehicle Service/Brake Pad Check .
Is the check result normal?
Fill the brake fluid up to the "MAX" level. Then go to Step 5.
Replace the brake pad (Refer to GROUP 35A - On-vehicle Service/Brake Pad Replacement ).
 
STEP 5. M.U.T.-IIISE data list for other system
Check the ETACS-ECU system data list.
 
Item No.Item nameNormal condition
102Brake fluid switchON
Is the check result normal?
YES <Lever type parking brake> : Go to Step 10.
YES <Electric parking brake> : This diagnosis is complete.
NO : Go to Step 6.
 
STEP 6. Brake fluid level switch check
Refer to GROUP 35A - On-vehicle Service/Brake Fluid Level Switch Check .
Is the check result normal?
Go to Step 7.
Replace the reservoir tank assembly (Refer to GROUP 35A - Master Cylinder Assembly and Brake Booster <LHD> or <RHD>).
 
STEP 7. Resistance measurement at brake fluid level switch connector.
(1) Disconnect the connector, and measure at the wiring harness side.
(2) Measure the resistance between the brake fluid level switch connector (earth terminal) and the body earth.
OK: Continuity exists (2 Ω or less)
Is the check result normal?
Go to Step 9.
Go to Step 8.
 
STEP 8. Check of open circuit in earth line between brake fluid level switch connector and the body earth
Is the check result normal?
Go to Step 9.
Repair the connector(s) or wiring harness.
 
STEP 9. Check of short to power supply, short to earth, and open circuit in HL1+ line between ETACS-ECU connector and brake fluid level switch connector
Is the check result normal?
Replace the ETACS-ECU (Refer to GROUP 54A - ETACS-ECU ).
Repair the connector(s) or wiring harness.
 
STEP 10. Parking brake lever stroke check
Refer to GROUP 36 - On-vehicle Service/Parking Brake Lever Stroke Check and Adjustment .
Is the check result normal?
Go to Step 11.
Adjust the parking brake lever stroke (Refer to GROUP 36 - On-vehicle Service/Parking Brake Lever Stroke Check and Adjustment ).
 
STEP 11. Parking brake switch check
Refer to GROUP 36 - On-vehicle Service/Parking Brake Switch Check .
Is the check result normal?
Go to Step 12.
Replace the parking brake switch (Refer to GROUP 36 - Parking Brake Lever ).
 
STEP 12. Check of short to power supply, short to earth, and open circuit in BRK line between combination meter connector and parking brake switch connector
Is the check result normal?
Go to Step 13.
Repair the connector(s) or wiring harness.
 
STEP 13. Retest the system.
Does the brake warning lamp turn ON and OFF normally according to the parking brake lever operation?
Intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/How to Cope with Intermittent Malfunctions ).
Replace the combination meter assembly (Refer to GROUP 54A - Combination Meter ).