Toyota Avalon Service & Repair Manual: Voice Guidance does not Function

Toyota Avalon Service & Repair Manual / Audio, Visual, Telematics / Navigation / Multi Info Display / Navigation System(for Gasoline Model) / Voice Guidance does not Function

WIRING DIAGRAM

PROCEDURE

1.

CHECK VOICE GUIDANCE SETTING

(a) Check that the voice guidance setting is not off.

OK:

Voice guidance setting is not off.

NG

CHANGE VOICE GUIDANCE SETTING TO ON
OK

2.

CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - NAVIGATION ECU)

(a) Disconnect the G1 radio and display receiver assembly connector.

(b) Disconnect the G13 navigation ECU connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

G1-22 (SI+) - G13-6 (VOI+)

Always

Below 1 Ω

G1-23 (SI-) - G13-7 (VOI-)

Always

Below 1 Ω

G1-22 (SI+) or G13-6 (VOI+) - Body ground

Always

10 kΩ or higher

G1-23 (SI-) or G13-7 (VOI-) - Body ground

Always

10 kΩ or higher

G13-8 (SLD1) - 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
    Voice Guidance Circuit between Radio Receiver and Stereo Component Amplifier

    Voice is not Recognized

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