DESCRIPTION The master cylinder pressure sensor is connected to the skid control ECU in the brake actuator assembly. 
HINT: DTC will be output when conditions for either of the patterns in the table above are met. WIRING DIAGRAM Refer to DTC C1249. Click here 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) Connect the Techstream to the DLC3. (b) Turn the engine switch on (IG). (c) Enter the following menus: Chassis / ABS/VSC/TRAC/EPB / Data List. Chassis > ABS/VSC/TRAC/EPB > Data List
(d) Take a note of the +BS voltage value. HINT: The noted +BS voltage value is used in a later step.
(a) Check that the stop lights come on when the brake pedal is depressed, and go off when the brake pedal is released. OK:
(a) Connect the Techstream to the DLC3. (b) Turn the engine switch on (IG). (c) Enter the following menus: Chassis / ABS/VSC/TRAC/EPB / Data List. Chassis > ABS/VSC/TRAC/EPB > Data List
(d) Check that the stop light switch assembly display observed on the Techstream changes according to brake pedal operation. OK: The Techstream displays on or off according to brake pedal operation.
(a) Start the engine. (b) Enter the following menus: Chassis / ABS/VSC/TRAC/EPB / Data List. Chassis > ABS/VSC/TRAC/EPB > Data List
(c) Check that the brake fluid pressure value of the master cylinder pressure sensor observed on the Techstream changes when the brake pedal is depressed. OK: When the brake pedal is depressed, the voltage displayed on the Techstream increases.
(a) Clear the DTCs. Chassis > ABS/VSC/TRAC/EPB > Clear DTCs(b) Turn the engine switch off. (c) Start the engine. (d) Drive the vehicle and depress the brake pedal several times to test the stop light circuit. (e) Check if the same DTC is output. Chassis > ABS/VSC/TRAC/EPB > Trouble Codes
(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 A28 skid control ECU (brake actuator assembly) connector. (d) Check both the connector case and the terminals for deformation and corrosion. OK: No deformation or corrosion. (e) Measure the voltage according to the value(s) in the table below. Standard Voltage:
HINT: *: The minimum voltage value varies depending on the +BS terminal voltage value. The minimum voltage is 85% or more of the +BS terminal voltage.
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Toyota Avalon (XX50) 2019-2022 Service & Repair Manual > Front Camera System(for Gasoline Model): FCM Destination Information Uninitialized (C1AAA)
DESCRIPTION When the forward recognition camera is replaced with a new one, the new forward recognition camera attempts to store the country specification information received from the main body ECU (multiplex network body ECU). If the forward recognition camera cannot store the country specificatio ...
