DESCRIPTION The brake hold operated indicator light illuminates when the brake hold system is operating (vehicle stopped due to brake fluid pressure hold) and turns off when the brake hold system operation is finished (brake fluid pressure decreases). The brake hold system may not operate depending on vehicle conditions even when the system is in standby mode and the brake hold standby indicator light is illuminated. If there is a system malfunction that causes brake hold control to be prohibited, when the vehicle is under the following conditions and the brake hold switch (electric parking brake switch assembly) is pressed, the brake hold operated indicator light blinks.
CAUTION / NOTICE / HINT NOTICE: When replacing the skid control ECU (brake actuator assembly), perform system variant learning and acceleration sensor zero point calibration. Click here PROCEDURE
(a) Check that the brake hold standby indicator light operates normally. (b) If the brake hold operated indicator light does not illuminate even though the brake hold standby indicator light is illuminated, check that the following brake hold operation (brake fluid pressure is being maintained ) conditions are met.
HINT: When a malfunction occurs in the brake control system, the brake hold operated indicator light blinks.
(a) Enter the following menus: Body Electrical / Combination Meter / Active Test. (b) Perform the Active Test of the combination meter assembly using the Techstream. Body Electrical > Combination Meter > Active Test
(c) Check the combination meter assembly. OK: The brake hold operated indicator light turns on or off in accordance with the Techstream operation.
(a) Enter the following menus: Chassis / ABS/VSC/TRAC/EPB / Active Test. Chassis > ABS/VSC/TRAC/EPB > Active Test
(b) Check the operating condition of the brake hold operated indicator light when operating it using the Techstream.
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Toyota Avalon (XX50) 2019-2022 Service & Repair Manual > Lane Departure Alert System (w/ Steering Control)(for Gasoline Model): Power Steering Control System (C1A70)
DESCRIPTION If the forward recognition camera receives an internal malfunction signal from the power steering ECU (rack and pinion power steering gear assembly), DTC C1A70 is stored. DTC No. Detection Item DTC Detection Condition Trouble Area C1A70 Power Steering Control System 2 seconds after the e ...