Toyota Tacoma manuals

Toyota Tacoma 2015-2018 Service Manual: 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 ).
  • Inspect the fuses for circuits related to this system before performing the following inspection procedure.

PROCEDURE

1.

CHECK CAN COMMUNICATION SYSTEM

NG

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

OK

2.

PERFORM ACTIVE TEST USING TECHSTREAM (BRAKE WARNING LIGHT)

(a) Turn the ignition switch off.

(b) Connect the Techstream to the DLC3.

(c) Turn the ignition switch to ON.

(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

(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

B

REPLACE MASTER CYLINDER SOLENOID

A

3.

INSPECT COMBINATION METER ASSEMBLY

(a) Turn the ignition switch off.

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

(c) Check the combination meter assembly.

OK:

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

OK

REPLACE MASTER CYLINDER SOLENOID

NG

GO TO METER / GAUGE SYSTEM

Multi-terrain Select Indicator Light Remains ON
DESCRIPTION Refer to Multi-terrain Select Indicator Light does not Come ON (See page ). WIRING DIAGRAM CAUTION / NOTICE / HINT NOTICE: When replacing the skid control ECU (master cyli ...

Brake Warning Light Remains ON
DESCRIPTION The BRAKE warning light comes on when brake fluid is insufficient, the parking brake is applied or the EBD is defective. WIRING DIAGRAM CAUTION / NOTICE / HINT NOTICE: Whe ...

Other materials:

Installation
INSTALLATION PROCEDURE 1. INSTALL HYDRAULIC BRAKE BOOSTER (a) Install a new brake booster gasket onto the hydraulic brake booster. (b) Install the hydraulic brake booster with the 4 nuts. Torque: 14 N·m {145 kgf·cm, 10 ft·lbf} (c) Using a union nut wrench, connect the 4 brake l ...

Diameter of the Tire is not Uniform (C1337)
DESCRIPTION The skid control ECU (brake actuator assembly) measures the speed of each wheel by receiving signals from the speed sensors. These signals are used for recognizing whether all 4 wheels are operating properly. Therefore, all wheel signals must indicate the same speed. D ...

Diagnosis System
DIAGNOSIS SYSTEM 1. DESCRIPTION (a) The certification ECU (smart key ECU assembly) and ECM control the vehicle engine immobiliser system functions. Engine immobiliser system data and Diagnostic Trouble Codes (DTCs) can be read through the vehicle Data Link Connector 3 (DLC3). In some cases, a ...

© 2011-2019 Copyright www.ttguide.net