Toyota 4Runner: Sound Signal Circuit between Radio Receiver and Stereo Jack Adapter

Toyota 4Runner Service Manual / Audio / Visual / Telematics / Audio / Video / Audio And Visual System / Sound Signal Circuit between Radio Receiver and Stereo Jack Adapter

DESCRIPTION

The No. 1 stereo jack adapter assembly sends the sound signal from an external device to the radio and display receiver assembly via this circuit.

The sound signal that has been sent is amplified by the radio and display receiver assembly and then is sent to the speakers.

If there is an open or short in the circuit, sound cannot be heard from the speakers even if there is no malfunction in the radio and display receiver assembly or speakers.

WIRING DIAGRAM

PROCEDURE

1.	CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - NO. 1 STEREO JACK ADAPTER ASSEMBLY)

(a) Disconnect the G49 radio and display receiver assembly connector.

(b) Disconnect the G53 No. 1 stereo jack adapter assembly connector.

Standard Resistance:

Tester Connection	Condition	Specified Condition
G53-6 (ARO) - G49-26 (VAR+)	Always	Below 1 Ω
G53-7 (ALO) - G49-28 (VAL+)	Always	Below 1 Ω
G53-8 (ASGN) - G49-27 (VA-)	Always	Below 1 Ω
G53-9 (AUXO) - G49-25 (ADPG)	Always	Below 1 Ω
G53-10 (AGND) - G49-11 (AGND)	Always	Below 1 Ω
G53-6 (ARO) - Body ground	Always	10 kΩ or higher
G53-7 (ALO) - Body ground	Always	10 kΩ or higher
G53-8 (ASGN) - Body ground	Always	10 kΩ or higher
G53-9 (AUXO) - Body ground	Always	10 kΩ or higher
G53-10 (AGND) - Body ground	Always	10 kΩ or higher

Text in Illustration

Front view of wire harness connector

(to Radio and Display Receiver Assembly)

Front view of wire harness connector

(to No. 1 Stereo Jack Adapter Assembly)

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

REPAIR OR REPLACE HARNESS OR CONNECTOR

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