RM38T0EC _54 Brake _112606 BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS _0608077 ELECTRONICALLY CONTROLLED BRAKE SYSTEM(for HEV Model) J

BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS  ELECTRONICALLY CONTROLLED BRAKE SYSTEM(for HEV Model)  VSC OFF Switch Circuit  


DESCRIPTION

The skid control ECU (brake actuator assembly) is connected to the combination meter assembly via CAN communication.

Pressing the VSC OFF switch turns off TRC operation, and pressing and holding this switch turns off TRC and VSC operation. If TRC and VSC operations are turned off, "Traction Control Turned Off" will be displayed on the multi-information display and the VSC OFF indicator light will come on.

WIRING DIAGRAM

C480618E13
1.406,0.708 1.719,0.906 0.313,0.198 10 false 14 1.417,1.521 1.729,1.719 0.313,0.198 10 false 31 5.01,0.708 5.323,0.906 0.313,0.198 10 false 19 5.083,1.531 5.396,1.729 0.313,0.198 10 false 5 5.365,0.906 6.042,1.271 0.677,0.365 10 false CANL 5.375,1.74 6.052,2.104 0.677,0.365 10 false CANH 0.885,0.917 1.563,1.281 0.677,0.365 10 false CANL 0.875,1.74 1.552,2.104 0.677,0.365 10 false CANH 0.167,3.938 0.479,4.135 0.313,0.198 10 false I5 0.146,4.115 2.115,4.635 1.969,0.521 10 false Combination Meter Assembly 2.896,4.344 4.865,4.792 1.969,0.448 10 false : CAN Communication Line 4.99,4.104 7.052,4.604 2.063,0.5 10 false Skid Control ECU (Brake Booster with Master Cylinder Assembly) 3.271,2.979 3.583,3.177 0.313,0.198 10 false I61 3.635,2.604 3.948,2.802 0.313,0.198 10 false 5 4.698,2.604 5.01,2.802 0.313,0.198 10 false 7 5.083,2.604 5.396,2.802 0.313,0.198 10 false 38 5.365,2.604 6.042,2.969 0.677,0.365 10 false CSW 4.51,2.604 4.823,2.802 0.313,0.198 10 false + 3.833,2.604 4.146,2.802 0.313,0.198 10 false E 6.49,2.729 6.802,2.927 0.313,0.198 10 false IC 5,3.927 5.802,4.271 0.802,0.344 10 false A151 3.26,3.156 5.198,3.635 1.938,0.479 10 false VSC OFF Switch (Combination Switch Assembly)

PROCEDURE

1.READ VALUE USING GTS (TRC/VSC OFF MODE)
a.

Operate the GTS to read the Data List.

Chassis > Brake/EPB > Data List
Tester Display Measurement Item Range Normal Condition Diagnostic Note
TRC(TRAC)/VSC OFF Mode TRC/VSC off mode Normal mode (TRC(TRAC) ON/VSC ON) /
TRC(TRAC) OFF mode (TRC(TRAC) OFF/VSC ON) /
VSC expert mode (VSC expert mode MID ON) /
VSC OFF mode (TRC(TRAC) OFF/VSC OFF) 		Normal mode (TRC(TRAC) ON/VSC ON): Normal mode
TRC(TRAC) OFF mode (TRC(TRAC) OFF/VSC ON): TRC off mode
VSC expert mode (VSC expert mode MID ON): VSC expert mode
VSC OFF mode (TRC(TRAC) OFF/VSC OFF): VSC off mode 		-
Chassis > Brake/EPB > Data List
Tester Display
TRC(TRAC)/VSC OFF Mode
50003 435 45

b.

Check the indicator light and mode condition on the GTS changes according to VSC OFF switch operation.

Standard:
Switch Operation Mode Condition Display Multi-information Display ("Traction Control Turned Off") VSC OFF Indicator Light
Not pressed Normal mode (TRC(TRAC) ON/VSC ON) Not displayed Does not come on
Pressing the VSC OFF switch TRC(TRAC) OFF mode (TRC(TRAC) OFF/VSC ON) Displayed Does not come on
Pressing and holding the VSC OFF switch VSC OFF mode (TRC(TRAC) OFF/VSC OFF) Displayed Comes on



Result:
Result Proceed to
Indicator light and mode condition display do not change (VSC OFF switch (for Console Box)) A
Mode condition display is normal, but indicator light does not change B
Indicator light and mode condition display are normal C



A

2.INSPECT COMBINATION SWITCH ASSEMBLY

B

INSPECT METER / GAUGE SYSTEM

Click hereVehicle Interior>METER / GAUGE / DISPLAY>METER / GAUGE SYSTEM>HOW TO PROCEED WITH TROUBLESHOOTING


C

USE SIMULATION METHOD TO CHECK

Click hereGeneral>INTRODUCTION>HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS>HOW TO PROCEED WITH TROUBLESHOOTING


2.INSPECT COMBINATION SWITCH ASSEMBLY

Click hereBrake>BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS>VSC OFF SWITCH>INSPECTION

OK:

The VSC OFF switch (combination switch assembly) is normal.


Result:
Proceed to
OK
NG



OK

3.CHECK HARNESS AND CONNECTOR (BRAKE ACTUATOR ASSEMBLY - COMBINATION SWITCH ASSEMBLY)

NG

REPLACE COMBINATION SWITCH ASSEMBLY

Click hereBrake>BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS>VSC OFF SWITCH>REMOVAL


3.CHECK HARNESS AND CONNECTOR (BRAKE ACTUATOR ASSEMBLY - COMBINATION SWITCH 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 A151 skid control ECU (brake actuator assembly) connector.


c.

Disconnect the I61 VSC OFF switch (combination switch 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
I61-7 (+) - A151-38 (CSW) Always Below 1 Ω
I61-7 (+) or A151-38 (CSW) - Body ground Always 10 kΩ or higher
I61-5 (E) - Body ground 1 minute or more after disconnecting the cable from the negative (-) auxiliary battery terminal Below 1 Ω



Result:
Proceed to
OK
NG



OK

REPLACE BRAKE ACTUATOR ASSEMBLY

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


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR