PROCEDURE
(a) Check that conditions in the cabin are not likely to cause condensation. HINT: This problem occurs when the cabin is humid and the temperature changes rapidly. This may produce condensation, resulting in a short circuit. OK: Condensation is not likely to be produced.
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Toyota Tundra Service Manual > Navigation System: Parking Brake Switch Circuit
DESCRIPTION This circuit includes the parking brake switch assembly and navigation receiver assembly. WIRING DIAGRAM PROCEDURE 1. CHECK VEHICLE SIGNAL (OPERATION CHECK) (a) Display the "Vehicle Signal Check Mode" screen (See page ). (b) Check that the display changes between ON and OFF according to ...