Just reading my new Haynes, and thought that this was cool.
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The cooling system is fitted with a fail-safe mode, this comes into operation in stages when the temperature of the engine is too high:
STAGE 1
The cylinder head temperature sensor transmits a signal to the engine ECU, which then moves the gauge into the red zone.
If the engine is not switched off and the temperature continues to rise the multi-function warning light will come on.
STAGE 2
The engine ECU will contol the engine by starting to cut out two cylinders and restricting the engine to below 3000rpm. When this occurs the engine waring light will also illuminate. If the temperature should drop back to normal, the ignition will have to be switched off and then on again, to revert back to four cylinders.
STAGE 3
If the engine temperature continues to rise, the engine will be totally disabled before engine damage occurs. The engine warning light will begin to flash, indicating to the driver that the engine will be switched off after 30 seconds.
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I knew about the two cylinder bit, but not about the shutting the engine down in 30 seconds, a pretty good feature if you ask me, could possibly save you a new engine, if you are silly enough to keep it running through the first two stages.
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The cooling system is fitted with a fail-safe mode, this comes into operation in stages when the temperature of the engine is too high:
STAGE 1
The cylinder head temperature sensor transmits a signal to the engine ECU, which then moves the gauge into the red zone.
If the engine is not switched off and the temperature continues to rise the multi-function warning light will come on.
STAGE 2
The engine ECU will contol the engine by starting to cut out two cylinders and restricting the engine to below 3000rpm. When this occurs the engine waring light will also illuminate. If the temperature should drop back to normal, the ignition will have to be switched off and then on again, to revert back to four cylinders.
STAGE 3
If the engine temperature continues to rise, the engine will be totally disabled before engine damage occurs. The engine warning light will begin to flash, indicating to the driver that the engine will be switched off after 30 seconds.
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I knew about the two cylinder bit, but not about the shutting the engine down in 30 seconds, a pretty good feature if you ask me, could possibly save you a new engine, if you are silly enough to keep it running through the first two stages.
