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:

Diagnosis System
DIAGNOSIS SYSTEM 1. DESCRIPTION (a) The transponder key ECU assembly controls the engine immobiliser system. The engine immobiliser system data and Diagnostic Trouble Codes (DTCs) can be read through the vehicle Data Link Connector 3 (DLC3). 2. CHECK DLC3 (a) Check the DLC3 (See page ). 3. ...

Pcv Valve
Components COMPONENTS ILLUSTRATION Inspection INSPECTION PROCEDURE 1. INSPECT PCV VALVE SUB-ASSEMBLY (a) Install a clean hose to the PCV valve sub-assembly. (b) Check the PCV valve sub-assembly operation. (1) Blow air into the cylinder head cover sub-assembly LH side and check that ...

Dtc Check / Clear
DTC CHECK / CLEAR 1. CHECK DTC (a) Connect the Techstream to the DLC3. (b) Turn the ignition switch to ON. (c) Turn the Techstream on. (d) Enter the following menus: Body Electrical / Air Conditioner / Trouble Codes. (e) Check for DTCs. 2. CLEAR DTC (a) Connect the Techstream to the DLC3. ( ...

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