Toyota Tacoma manuals

Toyota Tacoma 2015-2018 Service Manual: 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 ).
  • 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.

CHECK HARNESS AND CONNECTOR (ATRC TERMINAL)

NG

GO TO STEP 4

OK

3.

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

OK

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

NG

REPLACE MASTER CYLINDER SOLENOID

4.

INSPECT A-TRAC SWITCH

NG

REPLACE A-TRAC SWITCH

OK

5.

INSPECT ROOF CONSOLE BOX ASSEMBLY

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

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:

Disassembly
DISASSEMBLY CAUTION / NOTICE / HINT HINT: Use the same procedures for both the LH and RH sides. The procedure described below is for the LH side. PROCEDURE 1. REMOVE OUTER MIRROR (a) Push the lower part of the mirror surface and tilt it. Text in Illustration ...

TC and CG Terminal Circuit
DESCRIPTION The DLC3 circuit enables reading of Diagnostic Trouble Codes (DTCs) with no Techstream by connecting terminals TC and CG of the DLC3 connector. Stored DTCs are displayed in blinking patterns of the CRUISE MAIN indicator light located on the combination meter. WIRING DIAGRAM HIN ...

How To Proceed With Troubleshooting
CAUTION / NOTICE / HINT HINT: Use the following procedure to troubleshoot the pre-collision system. *: Use the Techstream. PROCEDURE 1. VEHICLE BROUGHT TO WORKSHOP NEXT ...

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