Page 2513 of 3000
BRAKE CONTROL – VEHICLE STABILITY CONTROL SYSTEMBC–151
BC
HINT:
If troubleshooting has been carried out according to the
Problem Symptoms Table, refer back to the table and
proceed to the next step before replacing the part (See
page BC-79).
NG
OKREPLACE COMBINATION METER
ASSEMBLY
REPLACE BRAKE ACTUATOR ASSEMBLY
Page 2514 of 3000

BC–152BRAKE CONTROL – VEHICLE STABILITY CONTROL SYSTEM
BC
DESCRIPTION
The skid control ECU is connected to the combination meter via CAN and multiplex communications.
If the skid control ECU stores DTCs to shut down TRAC and VSC operation, the VSC warning light comes
on in the combination meter.
WIRING DIAGRAM
Refer to VSC Warning Light Remains ON (See page BC-147).
INSPECTION PROCEDURE
NOTICE:
When replacing the brake actuator assembly, perform zero point calibration (See page BC-70).
(a) Check if the CAN communication system DTC is output
(See page CA-17).
Result
B
A
(a) Check if the multiplex communication system DTC is
output (See page MP-14).
Result
B
A
(a) Connect the intelligent tester to the DLC3.
(b) Start the engine.
(c) Select the Active Test mode on the intelligent tester (See
page BC-85).
ABS / VSC:
VSC Warning Light does not Come ON
1CHECK CAN COMMUNICATION SYSTEM
Result Proceed to
CAN communication system DTC is not output A
CAN communication system DTC is output B
INSPECT CAN COMMUNICATION SYSTEM
2CHECK MULTIPLEX COMMUNICATION SYSTEM
Result Proceed to
Multiplex communication system DTC is not output A
Multiplex communication system DTC is output B
INSPECT MULTIPLEX COMMUNICATION
SYSTEM
3CHECK VSC WARNING LIGHT
Tester Display Test Part Control Range Diagnostic Note
VSC WARN LIGHT VSC warning light Warning light ON / OFF Observe combination meter
Page 2515 of 3000
BRAKE CONTROL – VEHICLE STABILITY CONTROL SYSTEMBC–153
BC
(d) Check that "ON" and "OFF" of the VSC warning light are
indicated on the combination meter when using the
intelligent tester.
OK:
The VSC warning light turns on or off in
accordance with the intelligent tester.
HINT:
If troubleshooting has been carried out according to the
Problem Symptoms Table, refer back to the table and
proceed to the next step before replacing the part (See
page BC-79).
NG
OK
(a) Turn the ignition switch off.
(b) Check the combination meter (See page ME-4).
OK:
The combination meter is normal.
HINT:
If troubleshooting has been carried out according to the
Problem Symptoms Table, refer back to the table and
proceed to the next step (See page BC-79).
NG
OK Go to step 4
REPLACE BRAKE ACTUATOR ASSEMBLY
4INSPECT COMBINATION METER ASSEMBLY
REPLACE COMBINATION METER
ASSEMBLY
REPLACE BRAKE ACTUATOR ASSEMBLY
Page 2516 of 3000
BC–154BRAKE CONTROL – VEHICLE STABILITY CONTROL SYSTEM
BC
DESCRIPTION
The BRAKE warning light comes on when the brake fluid is insufficient, the parking brake is applied or the
EBD is defective.
WIRING DIAGRAM
INSPECTION PROCEDURE
HINT:
When releasing the parking brake, move the shift lever into the P position in an AT vehicle, and choke in
an MT vehicle to hold the vehicle for safety.
Brake Warning Light Remains ON
C160966E02
Page 2517 of 3000

BRAKE CONTROL – VEHICLE STABILITY CONTROL SYSTEMBC–155
BC
(a) Check that the brake fluid level is proper.
NG
OK
(a) Are the DTC recorded? (See page BC-82)
Result
B
A
(a) WHEN USING INTELLIGENT TESTER:
(1) Connect the intelligent tester to the DLC3.
(2) Start the engine.
(3) Select the item "BRAKE WARN LIGHT" in the
ACTIVE TEST and operate the BRAKE warning
light on the intelligent tester.
ABS / VSC:
(4) Check that "ON" and "OFF" of the BRAKE warning
light are indicated on the combination meter when
using the intelligent tester.
OK:
Turn the BRAKE warning light on or off in
accordance with the intelligent tester.
(b) WHEN NOT USING INTELLIGENT TESTER:
(1) Turn the ignition switch off and disconnect the
connector from the skid control ECU.
1CHECK BRAKE FLUID LEVEL
ADD BRAKE FLUID
2CHECK DTC
Result Proceed to
DTC is outputA
DTC is not outputB
Go to step 3
REPAIR CIRCUITS INDICATED BY OUTPUT DTCS
3CHECK BRAKE WARNING LIGHT
Tester Display Test Part Control Range Diagnostic Note
BRAKE WRN LIGHT BRAKE warning light Warning light ON / OFF Observe combination meter
Page 2518 of 3000

BC–156BRAKE CONTROL – VEHICLE STABILITY CONTROL SYSTEM
BC
(2) Ground terminal BRL of the skid control ECU.
(3) Turn the ignition switch to the ON position.
(4) Check that the brake warning light.
OK:
Turn the light on or off in accordance with the
connection of terminal GND and BRL.
NOTICE:
When replacing the brake actuator assembly,
perform zero point calibration (See page BC-70).
NG
OK
(a) Remove the parking brake switch connector.
(b) Measure the resistance according to the value(s) in the
table below.
Standard resistance
NG
OK
(a) Disconnect the skid control ECU connector and the
parking brake switch connector.
(b) Measure the resistance according to the value(s) in the
table below.
Standard resistance
(c) Measure the resistance according to the value(s) in the
table below.
Standard resistance
NG
G024767E52 Go to step 4
REPLACE BRAKE ACTUATOR ASSEMBLY
4INSPECT PARKING BRAKE SWITCH
G026238E11
Tester Connection Switch Condition Specified Condition
P6-1 - Ground part Released Below 1
P6-1 - Ground part Pushed in 10 k or higher
REPLACE PARKING BRAKE SWITCH
5CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - PARKING BRAKE SWITCH)
G026243E04
Tester Connection Specified Condition
S3-28 (PKB) - P6-1 (PKB) Below 1
Tester Connection Specified Condition
S3-28 (PKB) - Body ground 10 k
or higher
REPAIR OR REPLACE HARNESS OR
CONNECTOR
Page 2519 of 3000
BRAKE CONTROL – VEHICLE STABILITY CONTROL SYSTEMBC–157
BC
OK
(a) Remove the reservoir tank cap and strainer.
(b) Disconnect the brake fluid level warning switch
connector.
(c) Measure the resistance according to the value(s) in the
table below.
Standard resistance
NG
OK
(a) Disconnect the combination meter connector and the
brake fluid level warning switch connector.
6INSPECT BRAKE FLUID LEVEL WARNING SWITCH
C119428E02
Tester Connection Switch Condition Specified Condition
(B1-1) - (B1-2) Float UP 10 k
or higher
(B1-1) - (B1-2) Float DOWN Below 1
REPLACE BRAKE MASTER CYLINDER
RESERVOIR SUB-ASSEMBLY (BRAKE
FLUID LEVEL WARNING SWITCH)
7CHECK HARNESS AND CONNECTOR (BRAKE FLUID LEVEL WARNING SWITCH -
COMBINATION METER)
Page 2520 of 3000
BC–158BRAKE CONTROL – VEHICLE STABILITY CONTROL SYSTEM
BC
(b) Measure the resistance according to the value(s) in the
table below.
Standard resistance
(c) Measure the resistance according to the value(s) in the
table below.
Standard resistance
NG
OK
C119429E03
Tester Connection Specified Condition
(C10-13) - (B1-1) Below 1
Tester Connection Specified Condition
(C10-13) - Body ground 10 k
or higher
REPAIR OR REPLACE HARNESS OR
CONNECTOR
REPAIR OR REPLACE COMBINATION METER ASSEMBLY