RM3660EC _54 Brake _080770 BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS _0599814 ELECTRONICALLY CONTROLLED BRAKE SYSTEM(for Gasoline Model (NR Series)) J

BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS  ELECTRONICALLY CONTROLLED BRAKE SYSTEM(for Gasoline Model (NR Series))  Brake Warning Light Remains ON  


DESCRIPTION

This procedure is for troubleshooting when the brake warning light (red indicator) remains on but no DTCs are output.

The skid control ECU (brake actuator assembly) controls the brake warning light (red indicator) in the combination meter assembly via CAN communication.

WIRING DIAGRAM

C538313E07
5.667,0.51 5.979,0.708 0.313,0.198 10 false 19 5.729,1.094 6.042,1.292 0.313,0.198 10 false 5 5.927,0.688 6.542,0.885 0.615,0.198 10 false CANL 5.938,1.271 6.552,1.469 0.615,0.198 10 false CANH 5.563,4.344 6.26,4.573 0.698,0.229 10 false A51 5.563,4.51 7.094,4.938 1.531,0.427 10 false Skid Control ECU (Brake Actuator Assembly) 0.75,0.677 1.365,0.875 0.615,0.198 10 false CANL 0.719,1.292 1.333,1.49 0.615,0.198 10 false CANH 1.302,0.479 1.615,0.677 0.313,0.198 10 false 25 1.323,0.688 1.698,0.917 0.375,0.229 10 false I4 1.323,1.271 1.74,1.5 0.417,0.229 10 false I4 1.344,2.688 1.771,2.927 0.427,0.24 10 false I5 0.875,2.573 1.49,2.771 0.615,0.198 10 false SW 1.333,1.063 1.646,1.26 0.313,0.198 10 false 9 1.313,2.469 1.625,2.667 0.313,0.198 10 false 16 2.198,2.573 2.51,2.771 0.313,0.198 10 false 1 4.115,2.583 4.427,2.781 0.313,0.198 10 false 2 2.073,3.052 2.531,3.25 0.458,0.198 10 false A67 2.083,3.24 4.583,3.76 2.5,0.521 10 false Brake Fluid Level Warning Switch (Brake Master Cylinder Reservoir Assembly) 3.365,5.24 5.281,5.604 1.917,0.365 10 false : CAN Communication Line 0.063,4.406 1.979,4.823 1.917,0.417 10 false Combination Meter Assembly 2.396,2.573 2.708,2.771 0.313,0.198 10 false + 3.917,2.583 4.229,2.781 0.313,0.198 10 false E

CAUTION / NOTICE / HINT

NOTICE:
·

After replacing the skid control ECU (brake actuator assembly), perform acceleration sensor zero point calibration and system information memorization.

Click hereBrake>BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS>ELECTRONICALLY CONTROLLED BRAKE SYSTEM (for Gasoline Model (NR Series))>UTILITY

·

Before performing this procedure, depress the brake pedal and confirm that the stop lights illuminate.



PROCEDURE

1.PRE-CHECK
a.

Check that all of the following conditions required for the brake warning light (red indicator) to turn off are met:

i.

The ABS warning light are 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.

Click hereBrake>BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS>ELECTRONICALLY CONTROLLED BRAKE SYSTEM (for Gasoline Model (NR Series))>ABS Warning Light Remains ON



ii.

The brake fluid level in the brake master cylinder reservoir assembly is not low.


iii.

The vacuum inside the brake booster decreases.

HINT:

When the vacuum inside the brake booster decreases, the brake warning light (red indicator) comes on.




Result:
Proceed to
NEXT



NEXT

2.CHECK VEHICLE CONTROL HISTORY (ELECTRONICALLY CONTROLLED BRAKE SYSTEM AND ELECTRIC PARKING BRAKE SYSTEM)
2.CHECK VEHICLE CONTROL HISTORY (ELECTRONICALLY CONTROLLED BRAKE SYSTEM AND ELECTRIC PARKING BRAKE SYSTEM)
a.

Connect the GTS to the DLC3.


b.

Turn the ignition switch to ON.


c.

Enter the following menus: Chassis / Brake/EPB / Utility / Vehicle Control History (RoB).


d.

Using the GTS, check for Vehicle Control History.

Click hereBrake>BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS>ELECTRONICALLY CONTROLLED BRAKE SYSTEM (for Gasoline Model (NR Series))>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 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

3.INSPECT BRAKE MASTER CYLINDER RESERVOIR ASSEMBLY

B

PERFORM TROUBLESHOOTING AND REPAIR REGARDING VEHICLE CONTROL HISTORY

Click hereBrake>BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS>ELECTRONICALLY CONTROLLED BRAKE SYSTEM (for Gasoline Model (NR Series))>VEHICLE CONTROL HISTORY

NOTICE:

After performing troubleshooting and repair regarding vehicle control history, clear the vehicle control history.



3.INSPECT BRAKE MASTER CYLINDER RESERVOIR ASSEMBLY
a.
C230719C35
2,1.99 2.51,2.813 true 1.458,1.99 0.958,2.813 true 0.365,0.302 0.594,0.49 0.229,0.188 10 false *a 2.563,2.844 2.719,3.031 0.156,0.188 10 false + 0.844,2.865 1,3.052 0.156,0.188 10 false E
*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.



b.

Disconnect the A67 brake fluid level warning switch (brake master cylinder reservoir assembly) connector.


c.

Check both the connector case and the terminals for deformation and corrosion.

OK:

No deformation or corrosion.



d.

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) 10 kΩ or higher
1 (+) - 2 (E) Switch on (float down) Below 1 Ω



e.

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

4.CHECK HARNESS AND CONNECTOR (COMBINATION METER ASSEMBLY - BRAKE MASTER CYLINDER RESERVOIR ASSEMBLY)

NG

REPLACE BRAKE MASTER CYLINDER RESERVOIR ASSEMBLY

Click hereBrake>BRAKE SYSTEM (OTHER)>BRAKE MASTER CYLINDER (for Gasoline Model)>DISASSEMBLY


4.CHECK HARNESS AND CONNECTOR (COMBINATION METER ASSEMBLY - BRAKE MASTER CYLINDER RESERVOIR ASSEMBLY)
a.

Make sure that there is no looseness at the locking part and the connecting part of the connector.

OK:

The connector is securely connected.



b.

Disconnect the I5 combination meter assembly connector.


c.

Disconnect the A67 brake fluid level warning switch (brake master cylinder reservoir assembly) connector.


d.

Check both the connector case and the terminals for deformation and corrosion.

OK:

No deformation or corrosion.



e.

Measure the resistance according to the value(s) in the table below.

Standard Resistance:
Tester Connection Condition Specified Condition
I5-16 (SW) - A67-1 (+) Always Below 1 Ω
I5-16 (SW) or A67-1 (+) - Body ground Always 10 kΩ or higher
A67-2 (E) - Body ground 1 minute or more after disconnecting the cable from the negative (-) battery terminal Below 1 Ω



Result:
Proceed to
OK
NG



OK

5.INSPECT COMBINATION METER ASSEMBLY

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

5.INSPECT COMBINATION METER ASSEMBLY
a.

Connect the GTS to the DLC3.


b.

Turn the ignition switch to ON.


c.

Enter the following menus: Body Electrical / Combination Meter / Active Test.


d.

Perform the Active Test of the combination meter assembly using the GTS.

Click hereVehicle Interior>METER / GAUGE / DISPLAY>METER / GAUGE SYSTEM (except 12.3 Inch Display)>DATA LIST / ACTIVE TEST

Body Electrical > Combination Meter > Active Test
Tester Display
Brake Warning
50004 409 107

e.

Check the combination meter assembly.

OK:

The brake warning light (red indicator) turns on or off in accordance with GTS operation.



Result:
Proceed to
OK
NG



OK

REPLACE BRAKE ACTUATOR ASSEMBLY

Click hereBrake>BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS>BRAKE ACTUATOR (for Gasoline Model)>REMOVAL


NG

INSPECT METER / GAUGE SYSTEM

Click hereVehicle Interior>METER / GAUGE / DISPLAY>METER / GAUGE SYSTEM (except 12.3 Inch Display)>HOW TO PROCEED WITH TROUBLESHOOTING