DESCRIPTION If none of the switch indicators on the air conditioning control panel (radio and display receiver assembly) illuminate, the following factors may be the cause.
PROCEDURE
(a) Check the malfunction status of switch indicators on the air conditioning control panel (radio and display receiver assembly).
(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 / Air Conditioner / Data List. (e) Read the Data List according to the display on the Techstream. Body Electrical > Air Conditioner > Data List
OK: The value displayed is 0°C (32°F) or higher.
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Toyota Avalon (XX50) 2019-2022 Service & Repair Manual > Audio And Visual System(for Hv Model): Steering Pad Switch Circuit
DESCRIPTION This circuit sends an operation signal from the steering pad switch assembly to the radio and display receiver assembly. If there is an open in the circuit, the audio system cannot be operated using the steering pad switch assembly. If there is a short in the circuit, the same condition ...