DESCRIPTION The main body ECU (multiplex network body ECU) detects the condition of the front door courtesy light switch assembly. WIRING DIAGRAM ![]() CAUTION / NOTICE / HINT NOTICE: Before replacing the main body ECU (multiplex network body ECU), refer to Registration. Click here 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 / Main Body / Data List. (e) Read the Data List according to the display on the Techstream. Body Electrical > Main Body > Data List
OK: Normal conditions listed above are displayed.
(a) Remove the front door courtesy light switch assembly (for RH). Click here
(b) Inspect the front door courtesy light switch assembly (for RH). Click here
(a) Disconnect the G33 main body ECU (multiplex network body ECU) connector. (b) Measure the resistance according to the value(s) in the table below. Standard Resistance:
(a) Remove the front door courtesy light switch assembly (for LH). Click here
(b) Inspect the front door courtesy light switch assembly (for LH). Click here
(a) Disconnect the G33 main body ECU (multiplex network body ECU) connector. (b) 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 > Audio And Visual System(for Hv Model): Diagnostic Trouble Code Chart
DIAGNOSTIC TROUBLE CODE CHART Audio and Visual System DTC No. Detection Item Link B1324 Lost Communication with Meter B1551 HD Radio Tuner Malfunction B1579 Voice Recognition Microphone Disconnected B1585 USB Device Malfunction B158D Video Signal Stoppage B158F AV Signal Stoppage (Low Battery Voltag ...