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Home >> Toyota >> 2017 >> 4Runner TRD Pro >> Repair and Diagnosis >> Brakes >> Traction Control >> Vehicle Stability Control System (For Hydraulic Brake Booster) - Diagnostic Codes (C1422-U0073) & Symptom Tests >> VEHICLE STABILITY CONTROL SYSTEM (for Hydraulic Brake Booster) >> TRAC OFF Indicator Light Remains ON [08/2015 - 08/2019] >> Description

TRAC OFF Indicator Light Remains ON [08/2015 - 08/2019]: Description

The skid control ECU is connected to the combination meter via the CAN communication system. Pressing the VSC OFF switch turns off traction control and pressing and holding this switch turns off traction control and VSC. If TRAC control turns off, the TRAC OFF indicator light comes on.

If there is a malfunction in the engine control system, the TRAC and A-TRAC system will turn off and the TRAC OFF indicator will turn on.

When the temperature inside the hydraulic brake booster becomes too high, the TRAC OFF indicator light turns on and traction control is stopped until the temperature decreases.

for 4WD: