PROCEDURE
(b) Reset display settings (contrast, brightness) and check that the screen appears normal. OK: The display returns to normal. Text in Illustration
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Toyota Tundra Service Manual > Navigation System: Operation Check
OPERATION CHECK 1. CHECK NAVIGATION SYSTEM NORMAL CONDITION (a) If the cause of a symptom is any of the following, the corresponding symptom is normal; it is not a malfunction. Symptom Answer A longer route than expected is chosen. Depending on the road conditions, the navigation receiver assembly m ...