2004 Toyota Matrix Owners Manual - Page 89

'04 MATRIX_U (L/O 0307) Tachometer Your vehicle may overheat during severe operating conditions, such as: NOTICE Do not let the indicator needle get into the red zone. This may cause severe engine damage. D Driving up a long hill on a hot day. D Reducing speed or stopping after high speed driving. D Idling for a long period with the air conditioning on in stop−and−go traffic. 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 control 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 215 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 engine lugging and over −revving. 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. 2ZZ−GE engine only-The engine will not exceed 7100 rpm before it warms up. 89 2004 MATRIX from Oct. '03 Prod. (OM12861U)