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The cruise control on my new Toyota Kluger will use the accelerator to maintain speeds uphill, but there is no speed control down steep hills-it does not apply the brakes. On a recent trip with the car set on 80 km/hr the speed reached 100 km/hr before I decided I needed to take over-this is not good for speeding fines! I have not noticed this in the last Toyota I owned. Toyota Australia advised that it can't give me any technical advice on whether this is how the car has been designed, the dealer has said this is normal for Toyotas, but it appears a poor design if it only controls speeds part of the way. Can you advise if this is normal?
The brakes are never applied by the cruise; brake applications are one of the ways the systems disconnect. They use engine braking to control over-speeding, but there is a limit to what it’s able to do. When you reach a steep downhill section of road it’s best to disengage the system and take control yourself, changing down gears as needed to maintain safe control.
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