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No. 6 Car-Navigation Control Switch Is Inoperative

WARNING: This page is about a different car, the 2004 Mazda 3. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: No.6 Car-Navigation Control Switch Is Inoperative - Possible Cause Chart
G02820719Courtesy of MAZDA MOTORS CORP.
Fig 2: No.6 Car-Navigation Control Switch Is Inoperative - Diagnostic Procedure
G02820720Courtesy of MAZDA MOTORS CORP.