Toyota Tacoma Quiz
Brake Control / Dynamic Control Systems

A-TRAC Indicator Light does not Come ON

In this manual: Brake Control / Dynamic Control Systems
Introduction — 15Maintenance — 8Audio / Video — 94Garage Door Opener — 7Navigation / Multi Info Display — 84Park Assist / Monitoring — 86Brake — 50Brake Control / Dynamic Control Systems — 165Parking Brake — 52gr-fks Charging — 252gr-fks Cooling — 212gr-fks Emission Control — 132gr-fks Engine Control — 322gr-fks Engine Mechanical — 332gr-fks Exhaust — 92gr-fks Fuel — 422gr-fks Ignition — 62gr-fks Intake — 72gr-fks Lubrication — 152gr-fks Starting — 38Ac60e Automatic Transmission / Transaxle — 146Axle — 19Clutch — 20Cruise Control — 168Differential — 50Drive Shaft — 6Propeller Shaft — 23Rc62f Manual Transmission / Transaxle — 34Suspension — 22Tire And Wheel — 39Vf2cm Transfer — 44Can Communication — 45Multiplex Communication — 20Power Distribution — 5Power Steering — 29Steering Column — 29Air Conditioning — 108Door Lock — 88Engine Hood / Door — 16Engine Immobiliser — 47Exterior — 55Horn — 5Interior — 18Interior Panel — 8Lighting — 93Meter / Gauge / Display — 31Mirror — 22Other System — 24Pre-collision — 40Seat — 52Seat Belt — 40Sliding Roof — 26Supplemental Restraint Systems — 139Theft Deterrent — 20Window / Glass — 53Wiper / Washer — 24
~1min read
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

  1. CHECK HARNESS AND CONNECTOR (ATRC TERMINAL)

NG

GO TO STEP 4
OK

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

OK

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

REPLACE MASTER CYLINDER SOLENOID

  1. INSPECT A-TRAC SWITCH

NG

REPLACE A-TRAC SWITCH
OK

  1. 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

Test yourself

A quick Toyota Tacoma quiz: every answer comes with an explanation and a link to the manual page.