TTGuideTacoma manuals & technical reference
Toyota Tacoma (2015-2018) Service Manual / Brake Control / Dynamic Control Systems / Vehicle Stability Control System(for Hydraulic Brake Booster) / TRAC OFF Indicator Light does not Come ON

Toyota Tacoma (2015-2018) Service Manual: TRAC OFF Indicator Light does not Come ON

DESCRIPTION

Refer to TRAC OFF Indicator Light Remains ON (See page WIRING DIAGRAM ).

WIRING DIAGRAM

Refer to TRAC OFF Indicator 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.

INSPECT SKID CONTROL ECU (CSW TERMINAL)

(a) Disconnect the S1 skid control ECU (master cylinder solenoid) connector.

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Switch Condition

Specified Condition

S1-9 (CSW) - Body ground

VSC OFF switch not pushed in

10 kΩ or higher

VSC OFF switch pushed in

Below 1 Ω
Text in Illustration

*a

Front view of wire harness connector

(to Skid Control ECU)

(c) Reconnect the S1 skid control ECU (master cylinder solenoid) connector.

NG

GO TO STEP 4

OK

3.

READ VALUE USING TECHSTREAM (TRAC/VSC OFF MODE)

(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 / Data List.

ABS/VSC/TRAC

Tester Display

Measurement Item

Control Range

Diagnostic Note

TRAC/VSC Off Mode

TRAC/VSC off mode/ Normal, TRC OFF, Unknown or VSC OFF

Normal: Normal mode

TRC OFF: TRAC OFF mode

VSC OFF: VSC OFF mode

-

(f) Check that the mode display changes according to VSC OFF switch operation.

OK:

Display changes according to switch operation.

OK

GO TO METER / GAUGE SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING)

NG

REPLACE MASTER CYLINDER SOLENOID

4.

INSPECT VSC OFF SWITCH

NG

REPLACE VSC OFF SWITCH

OK

5.

INSPECT ROOF CONSOLE BOX ASSEMBLY (MASTER CYLINDER SOLENOID - VSC OFF SWITCH)

A

REPAIR OR REPLACE HARNESS OR CONNECTOR (MASTER CYLINDER SOLENOID - ROOF CONSOLE BOX ASSEMBLY)
B

REPLACE ROOF CONSOLE BOX ASSEMBLY

C

REPLACE ROOF CONSOLE BOX ASSEMBLY

    Related Tacoma materials

    Front Upper Suspension Arm
    Components COMPONENTS ILLUSTRATION Disassembly DISASSEMBLY PROCEDURE 1. REMOVE FRONT SUSPENSION UPPER ARM BUSH (a) Using a hammer and chisel, raise the flange of the bushing diagonally as shown in the illustration. (b) Using SST and a press, remove the front suspension u ...

    Tire Pressure Monitor ECU Communication Stop Mode
    DESCRIPTION Detection Item Symptom Trouble Area Tire Pressure Monitor ECU Communication Stop Mode Either condition is met: Communication stop for "Tire Pressure2" is indicated on the "Communication Bus C ...

    Reverse Signal Circuit
    DESCRIPTION The radio and display receiver assembly*1 or navigation receiver assembly*2 receives a reverse signal from the park/neutral position switch*3 or the back-up light switch assembly*4. *1: w/o Navigation System *2: w/ Navigation System *3: for Automatic Transmission ...