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

Toyota Avalon (XX50) 2019-2022 Service & Repair Manual / Audio, Visual, Telematics / Navigation / Multi Info Display / Navigation System(for Gasoline Model) / Voice Guidance Circuit between Radio Receiver and Stereo Component Amplifier

DESCRIPTION

This circuit is used when the voice switch of the steering pad switch assembly is pushed.

Using this circuit, the radio and display receiver assembly sends signals to the stereo component amplifier assembly.

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

G14-3 (RL+) - G8-15 (II1+)

Always

Below 1 Ω

G14-8 (RL-) - G8-14 (II1-)

Always

Below 1 Ω

G8-18 (SLD1) - Body ground

Always

10 kΩ or higher

G14-3 (RL+) or G8-15 (II1+) - Body ground

Always

10 kΩ or higher

G14-8 (RL-) or G8-14 (II1-) - 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
    Vehicle Speed Signal Circuit between Stereo Component Amplifier and Combination Meter

    Voice Guidance does not Function

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