PROCEDURE
(a) Replace the disc with a known good one and check that the malfunction disappears. OK: Malfunction disappears.
(a) Check that the radio and display receiver assembly is properly installed Result
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Toyota Tundra Service Manual > Touch Select 2-4 And High-low System: Precaution
PRECAUTION 1. TROUBLESHOOTING PRECAUTION (a) When there is a malfunction in the contact point of the terminals or installation problems with parts, removal and installation of the suspected problem parts may return the system to the normal condition either completely or temporarily. (b) In order to ...