DESCRIPTION The headlight ECU sub-assembly operates using the power source voltage input from the IG terminal and ECUB terminal. The IG terminal power source voltage is supplied by turning the IG1-NO. 1 relay to ON. The headlight ECU sub-assembly receives engine switch on (IG) signals from the main body ECU (multiplex network body ECU) via CAN communication, compares the engine switch on (IG) signal and the power source voltage supply condition of the IG terminal and monitors the result. HL AutoLeveling
WIRING DIAGRAM CAUTION / NOTICE / HINT NOTICE:
PROCEDURE
(a) Connect the Techstream to the DLC3. (b) Turn the engine switch on (IG). (c) Turn the Techstream on. (d) Enter the following menus: Body Electrical / HL AutoLeveling or HL AutoLeveling (Sub) / Trouble Codes. (e) Clear the DTCs. Body Electrical > HL AutoLeveling > Clear DTCs Body Electrical > HL AutoLeveling (Sub) > Clear DTCs
(a) Connect the Techstream to the DLC3. (b) Turn the engine switch on (IG). (c) Wait 10 seconds or more. (d) Turn the Techstream on. (e) Enter the following menus: Body Electrical / HL AutoLeveling or HL AutoLeveling (Sub) / Trouble Codes. (f) Check for DTCs. Body Electrical > HL AutoLeveling > Trouble Codes Body Electrical > HL AutoLeveling (Sub) > Trouble CodesOK: DTC B242E is not output.
(a) Disconnect the A8 headlight ECU sub-assembly LH connector. (b) Measure the voltage according to the value(s) in the table below. Standard Voltage:
(a) Measure the resistance according to the value(s) in the table below. Standard Resistance:
(a) Disconnect the A9 headlight ECU sub-assembly RH connector. (b) Measure the voltage according to the value(s) in the table below. Standard Voltage:
(a) Measure the resistance according to the value(s) in the table below. Standard Resistance:
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Toyota Avalon (XX50) 2019-2022 Service & Repair Manual > Navigation System(for Gasoline Model): Diagnostic Trouble Code Chart
DIAGNOSTIC TROUBLE CODE CHART Navigation System DTC No. Detection Item Link B1324 Lost Communication with Meter B1325 Lost Communication with HUD B153A GVIF Disconnected (from Extension Module to H/U) B1543 Extension Module Disconnected 2 B1551 HD Radio Tuner Malfunction B1556 Extension Module Malfu ...