DESCRIPTION These DTCs are stored if a CAN communication malfunction occurs between the headlight ECU sub-assembly RH and other ECUs.
PROCEDURE
(a) Connect the Techstream to the DLC3. (b) Turn the power switch on (IG). (c) Turn the Techstream on. (d) Enter the following menus: Body Electrical / HL AutoLeveling (Sub) / Trouble Codes. (e) Clear the DTCs. Body Electrical > HL AutoLeveling (Sub) > Clear DTCs
(a) Connect the Techstream to the DLC3. (b) Turn the power switch on (IG). (c) Wait 35 seconds or more. (d) Turn the Techstream on. (e) Enter the following menus: Body Electrical / HL AutoLeveling (Sub) / Trouble Codes. (f) Check for DTCs. Body Electrical > HL AutoLeveling (Sub) > Trouble CodesOK: DTCs are not output.
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Toyota Avalon (XX50) 2019-2022 Service & Repair Manual > Active Noise Control System: Diagnostic Trouble Code Chart
DIAGNOSTIC TROUBLE CODE CHART Active Noise Control System DTC No. Detection Item Link B1AA044 ANC ECU EEPROM Data Memory Failure B1AA187 UART Communication Between ANC and Audio Amplifier Missing Message B1AA296 Front Left Microphone Circuit Component Internal Failure B1AA31C Front Left Microphone C ...