Toyota Tacoma 2015-2018 Service Manual: AUTO LSD Indicator Light Remains ON

Toyota Tacoma 2015-2018 Service Manual / Brake Control / Dynamic Control Systems / Vehicle Stability Control System(for Vacuum Brake Booster) / AUTO LSD Indicator Light Remains ON

DESCRIPTION

During normal mode, pressing the VSC OFF switch for a short amount of time changes vehicle to AUTO LSD mode.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

When replacing the brake actuator assembly, perform calibration (See page PROCEDURE ).

PROCEDURE

1.	CHECK CAN COMMUNICATION LINE

(a) Turn the ignition switch off.

(b) Connect the Techstream to the DLC3.

(d) Turn the Techstream on.

(e) Select CAN Bus Check from the System Selection Menu screen and follow the prompts on the screen to inspect the CAN bus (See page OK: OK: ).

OK:

CAN Bus Check indicates no malfunctions in CAN communication.

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

2.	PERFORM ACTIVE TEST USING TECHSTREAM (Indicat. Auto LSD)

(a) Turn the ignition switch off.

(b) Connect the Techstream to the DLC3.

(d) Turn the Techstream on.

(e) Enter the following menus: Body Electrical / Combination Meter / Active Test.

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

Combination Meter

Tester Display	Test Part	Control Range	Diagnostic Note
Indicat. Auto LSD	AUTO LSD indicator light	OFF/ON	Perform the test with the vehicle stopped and the engine idling

(g) Check that the AUTO LSD indicator light on the combination meter assembly turns on or off in accordance with the Techstream operation.

OK:

The AUTO LSD indicator light turns on or off in accordance with the Techstream operation.

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

3.	CHECK HARNESS AND CONNECTOR (CSW TERMINAL)

(a) Disconnect the S1 skid control ECU connector.

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

Standard Resistance:

Tester Connection	Switch Condition	Specified Condition
S1-33 (CSW) - Body ground	VSC OFF switch not pushed in	10 kΩ or higher
S1-33 (CSW) - Body ground	VSC OFF switch pushed in	Below 1 Ω

Text in Illustration

*a	Front view of wire harness connector (to Skid Control ECU)

REPLACE BRAKE ACTUATOR ASSEMBLY

4.	INSPECT VSC OFF SWITCH

(a) Turn the ignition switch off.

(b) Remove the VSC OFF switch (See page (c) Inspect the VSC OFF switch (See page ). ).

OK:

The VSC OFF switch operates normally.

REPAIR OR REPLACE HARNESS OR CONNECTOR

REPLACE VSC OFF SWITCH

AUTO LSD Indicator Light does not Come ON

DESCRIPTION The AUTO LSD does not operate even if the VSC OFF switch is pressed under the following conditions: The brake system is faulty. The temperature inside the hydraulic brake bo ...

Slip Indicator Light does not Come ON

DESCRIPTION Refer to Slip Indicator Light Remains ON (See page ). WIRING DIAGRAM Refer to Slip Indicator Light Remains ON (See page ). CAUTION / NOTICE / HINT NOTICE: When replacing the skid ...

Other materials:

Diagnostic Trouble Code Chart
DIAGNOSTIC TROUBLE CODE CHART HINT: If a trouble code is displayed during the DTC check, inspect the trouble areas listed for that code. For details of the code, refer to the "See page" below. Seat Heater System DTC Code Detection Item See page ...

Open / Short in Steering Lock ECU (B2781)
DESCRIPTION The steering lock ECU and steering lock motor are built into the steering lock actuator assembly. The steering lock ECU (steering lock actuator or UPR bracket assembly) detects whether the steering lock is in the lock or unlock position by using the lock sensor and unlock sensor ...

Lost Communication with Meter (B1324)
DESCRIPTION This DTC is stored when a communication error occurs between the radio and display receiver assembly and combination meter assembly. DTC No. DTC Detection Condition Trouble Area B1324 After the radio and display receiver as ...