Toyota Avalon (XX50): Radio Receiver Power Source Circuit. Registered Device cannot be Deleted. Reverse Signal Circuit

Toyota Avalon (XX50) 2019-2022 Service & Repair Manual / Audio, Visual, Telematics / Audio / Video / Audio And Visual System(for Hv Model) / Radio Receiver Power Source Circuit. Registered Device cannot be Deleted. Reverse Signal Circuit

Radio Receiver Power Source Circuit

DESCRIPTION

This is the power source circuit to operate the radio and display receiver assembly.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

Inspect the fuses for circuits related to this system before performing the following procedure.

PROCEDURE

1.

CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY POWER SOURCE)

(a) Disconnect the G3 and G2 radio and display receiver assembly connectors.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

G3-1 (GND1) - Body ground

Always

Below 1 О©

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

Standard Voltage:

Tester Connection

Condition

Specified Condition

G3-4 (+B1) - G3-1 (GND1)

Power switch off

11 to 14 V

G3-15 (ACC1) - G3-1 (GND1)

Power switch on (ACC)

11 to 14 V

G2-19 (IG) - G3-1 (GND1)

Power switch on (IG)

11 to 14 V

OK

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

Registered Device cannot be Deleted

PROCEDURE

1.

DELETE OPERATION

(a) Check if a registered portable player can be deleted normally.

OK:

Registered portable player can be deleted normally.

OK

END

NG

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

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

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

Power switch on (IG)

Shift lever in R

11 to 14 V

G3-28 (REV) - Body ground

Power switch on (IG)

Shift lever not in R

Below 1 V

OK

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

Precaution. Problem Symptoms Table. Radio Broadcast cannot be Received or Poor Reception

Satellite Radio Broadcast cannot be Received. Screen Flicker or Color Distortion. Sound of Portable Player cannot be Heard from Speakers or Sound is Low

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

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