Toyota Avalon (XX50) 2019-2022 Service & Repair Manual: Problem Symptoms Table

PROBLEM SYMPTOMS TABLE

HINT:

Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are listed in order of probability in the "Suspected Area" column of the table. Check each symptom by checking the suspected areas in the order they are listed. Replace parts as necessary.
Inspect the fuses and relays related to this system before inspecting the suspected areas below.

Application Function

Symptom	Suspected Area	Link
Vehicle status cannot be checked using the application	Proceed to "Remote Service Malfunction"
Vehicle status alerts are not received by the application even if remote notification operation conditions are met	Proceed to "Remote Service Malfunction"
Vehicle cannot be operated remotely using the application	Perform remote door lock and unlock registration and check if the problem symptom recurs
Vehicle cannot be operated remotely using the application	Proceed to "Remote Service Malfunction"

Remote Engine Start and Stop Function (Using electrical key transmitter sub-assembly)

Symptom	Suspected Area	Link
Engine does not start by remote engine start function	Proceed to "Remote Engine Starter does not Operate"
Engine does not stop by remote engine stop function	Proceed to "Remote Engine Starter does not Operate"

Toyota Avalon (XX50) 2019-2022 Service & Repair Manual > Smart Key System(for Start Function, Hv Model): System Voltage or GND Energization Malfunction (B228B)
DESCRIPTION This DTC is stored when there is a malfunction in the certification ECU (smart key ECU assembly) auxiliary battery power supply circuit or ground circuit. DTC No. Detection Item DTC Detection Condition Trouble Area Note B228B System Voltage or GND Energization Malfunction A malfunction i ...

Toyota Avalon (XX50) 2019-2022 Owners Manual