Toyota Tacoma (2015-2018) Service Manual: Brake Warning Light does not Come ON

Toyota Tacoma (2015-2018) Service Manual / Brake Control / Dynamic Control Systems / Vehicle Stability Control System(for Hydraulic Brake Booster) / Brake Warning Light does not Come ON

DESCRIPTION

Refer to Brake Warning Light Remains ON (See page WIRING DIAGRAM ).

WIRING DIAGRAM

Refer to Brake Warning Light Remains ON (See page CAUTION / NOTICE / HINT ).

CAUTION / NOTICE / HINT

NOTICE:

When replacing the skid control ECU (master cylinder solenoid), perform calibration (See page ).
Inspect the fuses for circuits related to this system before performing the following inspection procedure.

PROCEDURE

1.	CHECK CAN COMMUNICATION SYSTEM

GO TO CAN COMMUNICATION SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING)

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

(a) Turn the ignition switch off.

(b) Connect the Techstream to the DLC3.

(d) Turn the Techstream on.

(e) Enter the following menus: Chassis / ABS/VSC/TRAC / Active Test.

(f) According to the display on the Techstream, perform the Active Test.

ABS/VSC/TRAC

Tester Display	Measurement Item	Control Range	Diagnostic Note
Brake Warning Light	Brake warning light	Warning light OFF/ON	Observe the combination meter. [Vehicle condition] Vehicle stopped

Tester Display

Measurement Item

Control Range

Diagnostic Note

Brake Warning Light

Brake warning light

Warning light OFF/ON

Observe the combination meter.

[Vehicle condition]

Vehicle stopped

(g) When performing the Brake Warning Light Active Test, check Brake Warning Light in the Data List.

ABS/VSC/TRAC

Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
Brake Warning Light	Brake warning light/ ON or OFF	OFF	-

Result

Result	Proceed to
Brake warning light in the Data List turns ON/OFF using the Active Test	A
Brake warning light in the Data List does not change using the Active Test	B

REPLACE MASTER CYLINDER SOLENOID

3.	INSPECT COMBINATION METER ASSEMBLY

(a) Turn the ignition switch off.

(b) Perform Active Test of the combination meter assembly using the Techstream.

OK:

The brake warning light turns on or off in accordance with the Techstream.

REPLACE MASTER CYLINDER SOLENOID

GO TO METER / GAUGE SYSTEM

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