The tachometer indicates the approximate number of engine revolutions per minute (rpm).
Use the tachometer to select the correct shift points and to prevent lugging and/or over-revving the engine
CAUTION
Do not operate the engine within the tachometer's RED ZONE. This may cause severe engine damage.
Hyundai Tucson (LM) 2010-2015 Service Manual: Instrument Cluster Schematic Diagrams
Circuit Diagram (1)
Circuit Diagram (2)
Massage Flow Diagram
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Hyundai Tucson (LM) 2010-2015 Service Manual: Auto Light Switch Repair procedures
Inspection
Operate the auto light switch, then check for continuity between terminals of multi-function switch connector. ...