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 as when a switch is continuously depressed occurs. Therefore, the radio and display receiver assembly cannot be operated using the steering pad switch assembly, and the radio and display receiver assembly itself will not function. WIRING DIAGRAM CAUTION / NOTICE / HINT NOTICE: The vehicle is equipped with a Supplemental Restraint System (SRS) which includes components such as airbags. Before servicing (including removal or installation of parts), be sure to read the precaution for Supplemental Restraint System. Click here PROCEDURE
(a) Disconnect the G3 radio and display receiver assembly connector. (b) Measure the resistance according to the value(s) in the table below. Standard Resistance:
(a) Remove the steering pad switch assembly. Click here (b) Inspect the steering pad switch assembly. Click here
(a) Remove the spiral cable sub-assembly. Click here (b) Inspect the spiral cable sub-assembly. Click here
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Toyota Avalon (XX50) 2019-2022 Service & Repair Manual > Telematics System(for Gasoline Model): Diagnostic Trouble Code Chart
DIAGNOSTIC TROUBLE CODE CHART Telematics System DTC No. Detection Item Link U0142 Lost Communication with Body Control Module "B" U0155 Lost Communication with Instrument Panel Cluster (IPC) Control Module U0163 Lost Communication with Navigation Control Module ...