Hybrid Synergy Drive Operation - Lexus GS 450h 2006 Dismantling Manual

Hybrid Synergy Drive Operation

Once the READY indicator is illuminated in the instrument cluster, the vehicle may be driven.
However, the gasoline engine does not idle like a typical automobile and will start and stop
automatically. It is important to recognize and understand the READY indicator provided in the
instrument cluster. When lit, it informs the driver that the vehicle is on and operational even though the
gasoline engine may be off and the engine compartment is silent.
Vehicle Operation
With the GS450h, the gasoline engine may stop and start at any time while the READY indicator is
on.
Never assume that the vehicle is shut off just because the engine is off. Always look for the
READY indicator status. The vehicle is shut off when the READY indicator is off.
The vehicle may be powered by:
1. The electric motor only.
2. The gasoline engine only.
3. A combination of both the electric motor and the gasoline engine.
The vehicle computer determines the mode in which the vehicle operates to improve fuel economy
and reduce emissions. The driver cannot manually select the mode.
Instrument Cluster READY Indicator
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