DESCRIPTION The brake hold standby indicator light turns on if brake hold control is possible when the following conditions required for operation standby are met and the brake hold switch (electric parking brake switch assembly) is pressed while the engine switch is on (IG).
WIRING DIAGRAM  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) If the brake hold standby indicator light does not illuminate even though the brake hold switch (electric parking brake switch assembly) is pushed, check that the brake hold function operation conditions are met.
(a) Check if CAN communication system DTCs are output. Click here
(a) Check if the skid control ECU (brake actuator assembly) connector is securely connected. OK: The connector is securely connected.
(a) Turn the engine switch off. (b) Enter the following menus: Body Electrical / Combination Meter / Active Test. (c) Perform the Active Test of the combination meter assembly using the Techstream. Body Electrical > Combination Meter > Active Test
(d) Check the combination meter assembly. OK: The brake hold standby 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 standby indicator light when operating it using the Techstream.
(b) Make sure that there is no looseness at the locking part and the connecting part of the connector. OK: The connector is securely connected. (c) Disconnect the G24 brake hold switch (electric parking brake switch assembly) connector. (d) Check both the connector case and the terminal for deformation and corrosion. OK: No deformation or corrosion. (e) Measure the resistance according to the value(s) in the table below. Standard Resistance:
(a) Make sure that there is no looseness at the locking part and the connecting part of the connector. OK: The connector is securely connected. (b) Disconnect the A28 skid control ECU (brake actuator assembly) connector. (c) Check both the connector case and the terminal for deformation and corrosion. OK: No deformation or corrosion. (d) Measure the resistance according to the value(s) in the table below. Standard Resistance:
|
Toyota Avalon (XX50) 2019-2022 Service & Repair Manual > Intuitive Parking Assist System(for Gasoline Model): Front Left Sensor Malfunction (C1AE1)
DESCRIPTION The front corner ultrasonic sensor LH is installed to the front bumper. The clearance warning ECU assembly detects obstacles based on signals received from the front corner ultrasonic sensor LH. If the front corner ultrasonic sensor LH has an open circuit or other malfunction, it will no ...
