BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS  VEHICLE STABILITY CONTROL SYSTEM  Brake Warning Light does not Come ON  


DESCRIPTION

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

CAUTION / NOTICE / HINT

NOTICE:

When replacing the skid control ECU (brake actuator assembly), perform zero point calibration.

Click hereBrake>BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS>VEHICLE STABILITY CONTROL SYSTEM>CALIBRATION


PROCEDURE

1.CHECK CAN COMMUNICATION SYSTEM
a.

Check if CAN communication system DTCs are output.

Click herePower Source / Network>NETWORKING>CAN COMMUNICATION SYSTEM>DIAGNOSIS SYSTEM


Result:
Result Proceed to
DTCs are not output. A
DTCs are output. B



A

2.PERFORM ACTIVE TEST USING GTS (BRAKE WARNING LIGHT)

B

INSPECT CAN COMMUNICATION SYSTEM

Click herePower Source / Network>NETWORKING>CAN COMMUNICATION SYSTEM>HOW TO PROCEED WITH TROUBLESHOOTING


2.PERFORM ACTIVE TEST USING GTS (BRAKE WARNING LIGHT)
a.

Connect the GTS to the DLC3.


b.

Turn the engine switch on (IG).


c.

Select the Active Test on the GTS.

Click hereBrake>BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS>VEHICLE STABILITY CONTROL SYSTEM>DATA LIST / ACTIVE TEST

Chassis > ABS/VSC/TRC > Active Test
Tester Display Measurement Item Control Range Diagnostic Note
Brake Warning Light Brake warning light Warning light ON/OFF Can be observed on the combination meter assembly
Chassis > ABS/VSC/TRC > Active Test
Tester Display
Brake Warning Light
50004 105 12

d.

Select the Data List on the GTS.

Click hereBrake>BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS>VEHICLE STABILITY CONTROL SYSTEM>DATA LIST / ACTIVE TEST

Chassis > ABS/VSC/TRC > Data List
Tester Display Measurement Item Range Normal Condition Diagnostic Note
Brake Warning Light Brake warning light ON or OFF ON: Warning light on
OFF: Warning light off 		-
Chassis > ABS/VSC/TRC > Data List
Tester Display
Brake Warning Light
50003 105 52

e.

Check the operating condition of the brake warning light when operating it using the GTS.

Result:
Result Proceed to
Brake Warning Light in the Data List does not change using the Active Test. A
Brake Warning Light in the Data List turns ON/OFF using the Active Test. B


HINT:

If troubleshooting has been carried out according to Problem Symptoms Table, refer back to the table and proceed to the next step before replacing parts.

Click hereBrake>BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS>VEHICLE STABILITY CONTROL SYSTEM>PROBLEM SYMPTOMS TABLE




A

REPLACE BRAKE ACTUATOR ASSEMBLY

Click hereBrake>BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS>BRAKE ACTUATOR>REMOVAL


B

3.INSPECT COMBINATION METER ASSEMBLY
3.INSPECT COMBINATION METER ASSEMBLY
a.

Turn the engine switch off.


b.

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

Click hereVehicle Interior>METER / GAUGE / DISPLAY>METER / GAUGE SYSTEM>DATA LIST / ACTIVE TEST

Body Electrical > Combination Meter > Active Test
Tester Display
Indicat. Lamp Brake
50004 122 21

c.

Check the combination meter assembly.

OK:

The brake warning light turns on or off in accordance with the Active Test operation.


HINT:

If troubleshooting has been carried out according to Problem Symptoms Table, refer back to the table and proceed to the next step before replacing parts.

Click hereBrake>BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS>VEHICLE STABILITY CONTROL SYSTEM>PROBLEM SYMPTOMS TABLE



Result:
Proceed to
OK
NG



OK

REPLACE BRAKE ACTUATOR ASSEMBLY

Click hereBrake>BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS>BRAKE ACTUATOR>REMOVAL


NG

INSPECT METER / GAUGE SYSTEM

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