Toyota 4Runner: 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

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

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

(c) Measure the resistance according to the value(s) in the table below. 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 *a Front view of wire harness connector (to Radio and Display Receiver Assembly) *b Front view of wire harness connector (to No. 1 Stereo Jack Adapter Assembly)

OK

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR