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 system 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 area below.

Power Tilt and Power Telescopic Steering Column System

Symptom	Suspected Area	Link
Only manual switch does not operate	Tilt and telescopic manual switch circuit
Only auto away/return function does not operate	Check customize status of auto away/return function using the Techstream
Only auto away/return function does not operate	IG power source circuit
Only auto away function does not operate	Smart key system (for start function)
Only auto away function does not operate	Multiplex tilt and telescopic ECU
Only auto return function does not operate	Smart key system (for start function)
Only auto return function does not operate	Multiplex tilt and telescopic ECU
Only microcomputer preset memory/recall function does not operate with the set switch operation	Front power seat control system (w/ Memory)
	Seat memory switch
	Position control ECU assembly (Driver Seat)
	Multiplex tilt and telescopic ECU

Toyota Avalon (XX50) 2019-2022 Service & Repair Manual > Airbag System(for Gasoline Model): Lost Communication with Restraints Occupant Classification System Module (U0154)
DESCRIPTION The airbag ECU assembly sends/receives signals to/from each ECU via CAN communication. DTC No. Detection Item DTC Detection Condition Trouble Area Warning Indicate Test Mode / Check Mode U0154 Lost Communication with Restraints Occupant Classification System Module CAN communication erro ...

Toyota Avalon (XX50) 2019-2022 Owners Manual