Last Modified: 08-21-2023 6.11:8.1.0 Doc ID: RM100000001ATR9
Model Year Start: 2019 Model: Avalon Prod Date Range: [04/2018 -           ]
Title: AUDIO / VIDEO: AUDIO AND VISUAL SYSTEM (for Gasoline Model): Steering Pad Switch Circuit; 2019 - 2022 MY Avalon [04/2018 -        ]

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 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 2019 - 2020 MY Avalon [04/2018 - 08/2020]; SUPPLEMENTAL RESTRAINT SYSTEMS: AIRBAG SYSTEM (for Gasoline Model): PRECAUTION 2021 - 2022 MY Avalon [08/2020 -        ]; SUPPLEMENTAL RESTRAINT SYSTEMS: AIRBAG SYSTEM (for Gasoline Model): PRECAUTION

PROCEDURE

1.

CHECK HARNESS AND CONNECTOR (STEERING PAD SWITCH SIGNAL)

(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:

Tester Connection

Condition

Specified Condition

G3-21 (SW1) - G3-24 (SWG)

No switch pushed

95 to 105 kΩ

Seek+ switch pushed

Below 2.5 Ω

Seek- switch pushed

313 to 345 Ω

Volume+ switch pushed

950 to 1050 Ω

Volume- switch pushed

2955 to 3265 Ω

G3-22 (SW2) - G3-24 (SWG)

No switch pushed

95 to 105 kΩ

MODE switch pushed

Below 2.5 Ω

On/off hook switch pushed

950 to 1050 Ω

Voice switch pushed

2955 to 3265 Ω

OK

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE 2019 MY Avalon [04/2018 - 08/2019]; AUDIO / VIDEO: AUDIO AND VISUAL SYSTEM (for Gasoline Model): PROBLEM SYMPTOMS TABLE 2020 MY Avalon [08/2019 - 08/2020]; AUDIO / VIDEO: AUDIO AND VISUAL SYSTEM (for Gasoline Model): PROBLEM SYMPTOMS TABLE 2021 - 2022 MY Avalon [08/2020 -        ]; AUDIO / VIDEO: AUDIO AND VISUAL SYSTEM (for Gasoline Model): PROBLEM SYMPTOMS TABLE

NG

2.

INSPECT STEERING PAD SWITCH ASSEMBLY

(a) Remove the steering pad switch assembly.

Click here 2019 - 2020 MY Avalon Avalon HV [04/2018 - 08/2020]; SUPPLEMENTAL RESTRAINT SYSTEMS: STEERING PAD: REMOVAL 2021 MY Avalon Avalon HV [08/2020 - 08/2021]; SUPPLEMENTAL RESTRAINT SYSTEMS: STEERING PAD: REMOVAL 2022 MY Avalon Avalon HV [08/2021 -        ]; SUPPLEMENTAL RESTRAINT SYSTEMS: STEERING PAD: REMOVAL

(b) Inspect the steering pad switch assembly.

Click here 2019 - 2022 MY Avalon Avalon HV [04/2018 -        ]; STEERING COLUMN: STEERING PAD SWITCH: INSPECTION

NG

REPLACE STEERING PAD SWITCH ASSEMBLY 2019 - 2021 MY Avalon Avalon HV [04/2018 - 08/2021]; STEERING COLUMN: STEERING PAD SWITCH: REMOVAL 2022 MY Avalon Avalon HV [08/2021 -        ]; STEERING COLUMN: STEERING PAD SWITCH: REMOVAL

OK

3.

INSPECT SPIRAL CABLE SUB-ASSEMBLY

(a) Remove the spiral cable sub-assembly.

Click here 2019 - 2020 MY Avalon Avalon HV [04/2018 - 08/2020]; SUPPLEMENTAL RESTRAINT SYSTEMS: SPIRAL CABLE: REMOVAL 2021 MY Avalon Avalon HV [08/2020 - 08/2021]; SUPPLEMENTAL RESTRAINT SYSTEMS: SPIRAL CABLE: REMOVAL 2022 MY Avalon Avalon HV [08/2021 -        ]; SUPPLEMENTAL RESTRAINT SYSTEMS: SPIRAL CABLE: REMOVAL

(b) Inspect the spiral cable sub-assembly.

Click here 2019 - 2022 MY Avalon Avalon HV [04/2018 -        ]; SUPPLEMENTAL RESTRAINT SYSTEMS: SPIRAL CABLE: INSPECTION

OK

REPAIR OR REPLACE HARNESS OR CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - SPIRAL CABLE SUB-ASSEMBLY)

NG

REPLACE SPIRAL CABLE SUB-ASSEMBLY 2019 - 2020 MY Avalon Avalon HV [04/2018 - 08/2020]; SUPPLEMENTAL RESTRAINT SYSTEMS: SPIRAL CABLE: REMOVAL 2021 MY Avalon Avalon HV [08/2020 - 08/2021]; SUPPLEMENTAL RESTRAINT SYSTEMS: SPIRAL CABLE: REMOVAL 2022 MY Avalon Avalon HV [08/2021 -        ]; SUPPLEMENTAL RESTRAINT SYSTEMS: SPIRAL CABLE: REMOVAL