OPERATIONOFINSTRUMENTSANDCONTROLS -> Tachometer for Your Toyota 4 Runner SUV Fourth Generation (2003-2009)

07 12.25  
Tachometer  
D Idling for a long period with the air  
conditioning on in stopandgo traffic.  
NOTICE  
Do not let the indicator needle get  
into the red zone. This may cause  
severe engine damage.  
D Towing a trailer.  
NOTICE  
z Do not remove the thermostat in  
the engine cooling system as this  
may cause the engine to overheat.  
The thermostat is designed to con-  
trol the flow of coolant to keep the  
temperature of the engine within  
the specified operating range.  
z Do not continue driving with an  
overheated engine. See “If your  
vehicle overheats” on page 394 in  
Section 4.  
The tachometer indicates engine speed  
in thousands of rpm (revolutions per  
minute). Use it while driving to select  
correct shift points and to prevent en-  
gine lugging and overrevving.  
Driving with the engine running too fast  
causes excessive engine wear and poor  
fuel economy. Remember, in most cases  
the slower the engine speed, the greater  
the fuel economy.  
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