Strange Rev Increase when braking

[Peterm69uk]

Not sure if Ive always had this issue or if Ive just noticed it but when I'm going downhill and press the brake pedal my revs jump up, almost like using gear braking in a manual car. Is this normal? Usually jumps by at least 500 revs and when I press the accelerator it comes back down, doesn't always happen so has me thinking.

 

Any input appreciated.

 

Pete

[Charlie Brown]

I think this is a feature of many automatic boxes for many years. I think it is actually sensing that you are braking on a hill and changes down to give you some engine braking. When you accelerate it changes up again. I've had this feature on autos before and our 2008 Aplhard does it.

[Peterm69uk]

1 minute ago, Charlie Brown said:

I think this is a feature of many automatic boxes for many years. I think it is actually sensing that you are braking on a hill and changes down to give you some engine braking. When you accelerate it changes up again. I've had this feature on autos before and our 2008 Aplhard does it.

 

Thanks, that makes sense, I thought it was that and as I said Ive only just noticed it.

 

Cheers

 

Pete

[Rojie]

I agree with Myron.

 

Should be nothing to worry about unless the engine is caused to rev too high.

 

According to the JPNZ Owners Manual, this is a feature , known as ECT, of the 3 litre V6  1MZ-FE engine and gearbox.

 

It is also a feature of the 2AZ-FE.