2013 Lexus IS 350C BaseFACTORY OEM SERVICE PROCEDURE

Brake Override System: Description

When the vehicle is being driven with the accelerator pedal depressed, depressing the brake pedal without releasing the accelerator pedal will activate the brake override system to restrict driving torque. The conditions for activating the brake override system as well as the items that are controlled are explained below.

Fig 1: Identifying Brake Override System Description
GTY292770Courtesy of Β© TOYOTA, LICENSE AGREEMENT TMS1002

Activation Conditions:Β 

  • Vehicle is running at or above the specified speed.
  • The accelerator pedal is depressed beyond a specified level, and then the brake pedal is depressed.
NOTE:

The vehicle may not enter the brake override system control due to the relation of the accelerator pedal angle and the vehicle's speed.

Items Controlled:Β 

  • Driving torque is restricted.

HINT:Β 

During brake override system control, the value for the accelerator pedal angle (which is used for engine control) is forcibly reduced to a specified value. For this reason, the Data List value for Accelerator Position will be replaced with a specified value regardless of the actual accelerator pedal angle (Accel Sens. No. 1 Volt %, Accel Sens. No. 2 Volt %)

Deactivation Conditions:Β 

  • When the Stop Light Switch turns OFF or the actual accelerator pedal angle increases or decreases beyond the specified range.
Factory Service Tools

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • β€’ You smell fuel, burning insulation, or see smoke.
  • β€’ Brakes feel soft, pull hard to one side, or make grinding noises.
  • β€’ The engine overheats, stalls repeatedly, or misfires under load.
  • β€’ You are missing required tools, torque specs, or safe lifting equipment.
  • β€’ You are not confident in the next step or safety outcome.

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