Toyota Tundra Service Manual: Voice Guidance does not Function

PROCEDURE

1.	CHECK VOICE GUIDANCE SETTING

(a) Check that the voice guidance settings are not off.

OK:

Voice guidance settings are not off.

CHANGE VOICE GUIDANCE SETTINGS TO ON

2.	CHECK AUDIO FUNCTION

(a) Check that sound can be heard from a front speaker.

OK:

Sound can be heard.

Result

REPLACE NAVIGATION RECEIVER ASSEMBLY

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

Toyota Tundra Service Manual > Rear View Monitor System(for Navigation Receiver Type): Screen Flicker or Color Distortion
PROCEDURE 1. CHECK DISPLAY SETTING (a) Reset the display settings (contrast and brightness) and check that the screen appears normal. OK: The display returns to normal. OK END NG PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE ...

Toyota Tundra Owners Manual