DESCRIPTION The driving support ECU assembly uses the millimeter wave radar sensor assembly to detect objects in front of the vehicle. Based on signals from the millimeter wave radar sensor assembly, the driving support ECU assembly calculates the possibility of a collision and operates the pre-collision system if it determines that the possibility is high. When the millimeter wave radar sensor assembly is replaced with a new one, it acquires the country specification information from the driving support ECU assembly. Also, when the driving support ECU assembly is replaced with a new one, it receives country specification information from the main body ECU (multiplex network body ECU). If country specification information in the millimeter wave radar sensor assembly, driving support ECU and/or main body ECU do not match, DTC C1A0A will be stored.
CAUTION / NOTICE / HINT NOTICE:
PROCEDURE
(a) Clear the DTCs. Body Electrical > Pre-Collision 2 > Clear DTCs(b) Make sure that the DTC detection conditions are met. HINT: If the detection conditions are not met, the system cannot detect the malfunction. (c) Check for DTCs. Body Electrical > Pre-Collision 2 > Trouble Codes
(a) Replace the driving support ECU assembly. Click here
(a) Clear the DTCs. Body Electrical > Pre-Collision 2 > Clear DTCs(b) Make sure that the DTC detection conditions are met. HINT: If the detection conditions are not met, the system cannot detect the malfunction. (c) Check for DTCs. Body Electrical > Pre-Collision 2 > Trouble Codes
(a) Replace the millimeter wave radar sensor assembly. Click here (b) Adjust the millimeter wave radar sensor assembly. Click here
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Toyota Avalon (XX50) 2019-2022 Service & Repair Manual > Pre-collision System(for Hv Model): Lost Communication with Driving Support ECU (U1104)
DESCRIPTION The driving support ECU assembly is connected to the millimeter wave radar sensor assembly, forward recognition camera and skid control ECU (brake booster with master cylinder assembly) via CAN communication. If communication with the millimeter wave radar sensor assembly, forward recogn ...