PROCEDURE
(a) Replace the disc with a known good one and check that the malfunction disappears. OK: Malfunction disappears.
(a) Check that the navigation receiver assembly is properly installed Result
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Toyota Tundra Service Manual > Meter / Gauge System: Voltage Meter Malfunction
DESCRIPTION The voltmeter indicates the voltage applied to the IG+ terminal of the combination meter assembly. WIRING DIAGRAM CAUTION / NOTICE / HINT NOTICE: Inspect the fuses for circuits related to this system before performing procedure. PROCEDURE 1. PERFORM ACTIVE TEST USING TECHSTREAM (VOLTMETE ...