BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS ELECTRONICALLY CONTROLLED BRAKE SYSTEM(for Gasoline Model) Brake Warning Light Remains ON
DESCRIPTION
This procedure is for troubleshooting when the brake system warning light / red (indicator) remains on but no DTCs are output.
The skid control ECU (brake actuator assembly) controls the brake system warning light / red (indicator) in the combination meter assembly via CAN communication.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
- NOTICE:
- ·
After replacing the skid control ECU (brake actuator assembly), perform acceleration sensor zero point calibration and store system information memorization.
·Before performing this procedure, depress the brake pedal and confirm that the stop lights illuminate.
PROCEDURE
Check that all of the following conditions required for the brake system warning light / red (indicator) to turn off are met:
The ABS warning light is not illuminated.
- HINT:
-
If the ABS warning light remains illuminated, make sure that the conditions required for the ABS warning light to turn off are met.
The brake fluid level in the brake master cylinder reservoir assembly is not low.
The vacuum inside the brake booster decreases.
- HINT:
-
When the vacuum inside the brake booster decreases, the brake system warning light / red (indicator) comes on.
- Result:
Proceed to NEXT
NEXT
Connect the GTS to the DLC3.
Turn the ignition switch to ON.
Enter the following menus: Chassis / Brake/EPB / Utility / Vehicle Control History (RoB).
Using the GTS, check for Vehicle Control History.
- Chassis > Brake/EPB > Utility
-
Tester Display Vehicle Control History (RoB) - 50005 435 55
- HINT:
-
If vehicle control history is stored when the electronically controlled brake system and electric parking brake system are suspended, the brake system warning light / red (indicator) illuminates.
- Result:
Result Proceed to There is no vehicle control history for when the electronically controlled brake system and electric parking brake system were suspended. A There is vehicle control history for when the electronically controlled brake system and/or electric parking brake system were suspended. B
A
B
- NOTICE:
-
After performing troubleshooting and repair regarding vehicle control history, clear the vehicle control history.
| *a | Component without harness connected
(Brake Fluid Level Warning Switch (Brake Master Cylinder Reservoir Assembly)) |
Make sure that there is no looseness at the locking part and the connecting part of the connector.
- OK:
The connector is securely connected.
Disconnect the A1 brake fluid level warning switch (brake master cylinder reservoir assembly) connector.
Check both the connector case and the terminals for deformation and corrosion.
- OK:
No deformation or corrosion.
Measure the resistance according to the value(s) in the table below.
- HINT:
-
A float is located inside the reservoir. Its position changes according to the brake fluid level.
- Standard Resistance:
Tester Connection Condition Specified Condition 1 (+) - 2 (E) Switch off (float up) 1.9 to 2.1 kΩ 1 (+) - 2 (E) Switch on (float down) Below 1 Ω
If there is no problem after finishing the above check, adjust the brake fluid level to the MAX level.
- Result:
Proceed to OK NG
OK
NG
Make sure that there is no looseness at the locking part and the connecting part of the connector.
- OK:
The connector is securely connected.
Disconnect the G19*1 or G151*2 combination meter assembly connector.
*1: Except 12.3 Inch TFT Display Type
*2: for 12.3 Inch TFT Display Type
Disconnect the A1 brake fluid level warning switch (brake master cylinder reservoir assembly) connector.
Check both the connector case and the terminals for deformation and corrosion.
- OK:
No deformation or corrosion.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Except 12.3 Inch TFT Display Type Tester Connection Condition Specified Condition G19-16 (SW) - A1-1 (+) Always Below 1 Ω G19-16 (SW) or A1-1 (+) - Body ground Always 10 kΩ or higher A1-2 (E) - Body ground Always Below 1 Ω
for 12.3 Inch TFT Display Type Tester Connection Condition Specified Condition G151-11 (SW) - A1-1 (+) Always Below 1 Ω G151-11 (SW) or A1-1 (+) - Body ground Always 10 kΩ or higher A1-2 (E) - Body ground Always Below 1 Ω
- Result:
Proceed to OK NG
OK
NG
Check for DTCs.
- Powertrain > Stop and Start > Trouble Codes
- 50001 392
- Result:
Result Proceed to DTCs are not output A DTCs are output B
A
B
Connect the GTS to the DLC3.
Turn the ignition switch to ON.
Enter the following menus: Body Electrical / Combination Meter / Active Test.
Perform the Active Test of the combination meter assembly using the GTS.
for SFTM Made: Click hereVehicle Interior>METER / GAUGE / DISPLAY>METER / GAUGE SYSTEM (for SFTM Made)>DATA LIST / ACTIVE TEST202409,999999,_58,_083097,_0694858,RM100000002NUK1,
for GTMC Made: Click hereVehicle Interior>METER / GAUGE / DISPLAY>METER / GAUGE SYSTEM (for GTMC Made)>DATA LIST / ACTIVE TEST202405,999999,_58,_083097,_0694857,RM100000002LUOI,
- Body Electrical > Combination Meter > Active Test
-
Tester Display Brake Warning - 50004 409 107
Check the combination meter assembly.
- OK:
The brake system warning light / red (indicator) turns on or off in accordance with the GTS operation.
- Result:
Proceed to OK NG
OK
NG
for SFTM Made: Click hereVehicle Interior>METER / GAUGE / DISPLAY>METER / GAUGE SYSTEM (for SFTM Made)>HOW TO PROCEED WITH TROUBLESHOOTING202405,999999,_58,_083097,_0694858,RM100000002LUR9,
for GTMC Made: Click hereVehicle Interior>METER / GAUGE / DISPLAY>METER / GAUGE SYSTEM (for GTMC Made)>HOW TO PROCEED WITH TROUBLESHOOTING202405,999999,_58,_083097,_0694857,RM100000002LUOC,