Last Modified: 08-21-2023 6.11:8.1.0 Doc ID: RM100000001ATRB
Model Year Start: 2019 Model: Avalon Prod Date Range: [04/2018 -           ]
Title: AUDIO / VIDEO: AUDIO AND VISUAL SYSTEM (for Gasoline Model): Reverse Signal Circuit; 2019 - 2022 MY Avalon [04/2018 -        ]

Reverse Signal Circuit

DESCRIPTION

The radio and display receiver assembly receives a reverse signal from the BKUP LP relay.

WIRING DIAGRAM

PROCEDURE

1.

CHECK BACK-UP LIGHT

(a) Move the shift lever to R and check if the back-up lights come on.

OK:

The back-up lights come on.

NG

GO TO LIGHTING SYSTEM 2019 - 2021 MY Avalon [04/2018 - 08/2021]; LIGHTING (EXT): LIGHTING SYSTEM (for Gasoline Model without Cornering Light): HOW TO PROCEED WITH TROUBLESHOOTING 2022 MY Avalon [08/2021 -        ]; LIGHTING (EXT): LIGHTING SYSTEM (for Gasoline Model without Cornering Light): HOW TO PROCEED WITH TROUBLESHOOTING

OK

2.

CHECK HARNESS AND CONNECTOR (REVERSE SIGNAL)

(a) Disconnect the G3 radio and display receiver assembly connector.

(b) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection

Condition

Specified Condition

G3-28 (REV) - Body ground

Engine switch on (IG)

Shift lever in R

11 to 14 V

G3-28 (REV) - Body ground

Engine switch on (IG)

Shift lever not in R

Below 1 V
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

REPAIR OR REPLACE HARNESS OR CONNECTOR