If You Cannot Increase Engine Speed; If Your Vehicle Overheats; When The Engine Overheats - Lexus GX470 2004 Repair Manual

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IF YOU CANNOT INCREASE

ENGINE SPEED

If engine speed does not increase when the accelerator pedal

is depressed, there may be a problem somewhere in the

electronic throttle control system.

At this time, vibration may occur. However, if you depress the

accelerator pedal more firmly and slowly, you can drive your

vehicle at low speeds. Have your vehicle checked by your

Lexus dealer as soon as possible.

Even if the abnormality of the electronic throttle control system

is corrected during low speed driving, the system may not be

recovered until the engine is stopped and the ignition key is

turned to "ACC" or "LOCK" position.

Be especially careful to prevent erroneous pedal

IN CASE OF AN EMERGENCY

If your engine coolant temperature gauge indicates

overheating, if you experience a loss of power, or if you

hear a loud knocking or pinging noise, the engine has

probably overheated.

Pull safely off the road, stop the vehicle and turn on your

emergency flashers. Put the transmission in "P" and apply the

parking brake.

A: If steam is coming from your engine:

Turn off the engine. Leave the hood closed until there is no sign

of steam or coolant. Your engine could have been seriously

damaged already. Call your Lexus dealer for assistance.

To help avoid personal injury, keep the hood closed until

there is no steam. Escaping steam or coolant is sign of

very high pressure.