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

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

DESCRIPTION

The A-TRAC does not operate even if the A-TRAC switch is pressed under the following conditions:

The TRAC or VSC system is faulty.
The temperature inside the hydraulic brake booster increases and the A-TRAC operation is suspended.

WIRING DIAGRAM

Refer to A-TRAC 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 the following inspection procedure.

PROCEDURE

1.	CHECK CAN COMMUNICATION SYSTEM

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

2.	CHECK HARNESS AND CONNECTOR (ATRC TERMINAL)

GO TO STEP 4

3.	READ VALUE USING TECHSTREAM (A-TRC(TRAC) SWITCH)

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

REPLACE MASTER CYLINDER SOLENOID

4.	INSPECT A-TRAC SWITCH

REPLACE A-TRAC SWITCH

5.	INSPECT ROOF CONSOLE BOX ASSEMBLY

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

REPLACE ROOF CONSOLE BOX ASSEMBLY

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 ...

A-TRAC Indicator Light Remains ON

DESCRIPTION This is the A-TRAC main switch circuit. When the A-TRAC switch is turned on with the transfer in L4, the A-TRAC function is available and the A-TRAC indicator light illuminates. WIRI ...

Other materials:

Initialization
INITIALIZATION 1. RESET MEMORY NOTICE: Perform Reset Memory (AT initialization) when replacing the automatic transmission assembly, transmission valve body assembly or any of the shift solenoid valves. Reset Memory can be performed only with the Techstream. HINT: The E ...

Acceleration Sensor Malfunction (C1420)
DESCRIPTION Refer to DTCs C1419 and C1435 (See page ). DTC Code DTC Detection Condition Trouble Area C1420 After the difference between GL1 and GL2 becomes 0.6 G or more with the vehicle stationary, the difference remains 0.4 G or m ...

Brake System (P157800)
DESCRIPTION This DTC is stored when a malfunction is detected in the vehicle stability control system. DTC No. Detection Item DTC Detection Condition Trouble Area MIL P157800 Brake System While the igni ...