Toyota Avalon (XX50) 2019-2022 Service & Repair Manual: 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.

GO TO LIGHTING SYSTEM

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

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

REPAIR OR REPLACE HARNESS OR CONNECTOR

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Toyota Avalon (XX50) 2019-2022 Owners Manual