Toyota Avalon (XX50) 2019-2022 Service & Repair Manual: Sound Signal Circuit between Radio Receiver and Stereo Component Amplifier

Toyota Avalon (XX50) 2019-2022 Service & Repair Manual / Audio, Visual, Telematics / Audio / Video / Audio And Visual System(for Gasoline Model) / Sound Signal Circuit between Radio Receiver and Stereo Component Amplifier

DESCRIPTION

The radio and display receiver assembly sends a sound signal to the stereo component amplifier assembly via this circuit.

The sound signal that is sent is amplified by the stereo component amplifier assembly, and then is sent to the speakers.

If there is an open or short in this circuit, sound cannot be heard from the speakers even if the stereo component amplifier assembly or speakers are not malfunctioning.

WIRING DIAGRAM

PROCEDURE

1.

CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - STEREO COMPONENT AMPLIFIER ASSEMBLY)

(a) Disconnect the G14 radio and display receiver assembly connector.

(b) Disconnect the G8 stereo component amplifier assembly connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

G8-5 (R+) - G14-1 (FR+)

Always

Below 1 Ω

G8-4 (R-) - G14-6 (FR-)

Always

Below 1 Ω

G8-3 (L+) - G14-2 (FL+)

Always

Below 1 Ω

G8-2 (L-) - G14-7 (FL-)

Always

Below 1 Ω

G8-6 (SLD) - Body ground

Always

10 kΩ or higher

G8-5 (R+) or G14-1 (FR+) - Body ground

Always

10 kΩ or higher

G8-4 (R-) or G14-6 (FR-) - Body ground

Always

10 kΩ or higher

G8-3 (L+) or G14-2 (FL+) - Body ground

Always

10 kΩ or higher

G8-2 (L-) or G14-7 (FL-) - Body ground

Always

10 kΩ or higher
OK

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
    Sound of Portable Player cannot be Heard from Speakers or Sound is Low

    Sound Signal Circuit between Radio Receiver and Stereo Jack Adapter

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