Condition of ISG system operation
The ISG system will operate under the following condition:
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The driver’s seatbelt is fastened
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The driver’s door and bonnet are closed
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The brake vacuum pressure is adequate
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The battery sensor is activated and the battery is sufficiently charged
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Outside temperature is not too low or too high
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The vehicle is driven over a constant speed and stops
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The climate control system satisfies the conditions
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The vehicle is sufficiently warmed up
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The incline is gradual
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The steering wheel is turned less than 180 degrees and then the vehicle stops (Only for Automated Manual Transmission)

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If the ISG system does not meet that operation condition, the ISG system is deactivated. The light on the ISG OFF button will illuminate.
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If the light comes on continuously, please check the operation condition.