终于弄清车上O/D off，PWR，MANU这些按钮是干嘛的了

Ben87

下面是在网上找到的回答，不过我觉得只有上高速才需要关掉O/D off
Hey there,

If you want to get the most out of your auto this is a fairly simple guideline that I use whenever I'm behind the wheel of an automatic.

Firstly, just to outline what the RAV4 auto transmission is like.

P: Park
R: Reverse
N: Neutral
D: 4th gear (O/D OFF when lit, will not engage 4th gear and stay in 3rd gear)
2: 2nd gear - only used for engine braking.
L: 1st gear - only used for engine braking

The RAV4, being a 4-speed auto transmission, you would probably want to practice a driving style as follows:

It's best to leave the transmission in the D position and only change the following.

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O/D (overdrive)
This mode should always be set to ON unless you are driving in the following conditions:

1. Driving uphill and the transmission is constantly riding between 4th and 3rd gear

2. Driving downhill when you are constantly riding the brakes - gives you engine braking power to assist your braking

3. When driving on a road that constantly requires you to brake, then accelerate, than brake. This in turn gives you more engine braking power, and acceleration power as it will not change to 4th gear.

4. during low speed driving conditions

Other than that, all other driving conditions will be fine to drive with O/D set to ON. For peace of mind, even though the transmission will not shift to overdrive (4th gear) when the engine is cold, I always like to switch O/D to OFF when the car is going to be parked.

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ECT PWR / MANU MODE

This is a fun little button only if you know how to use it. Misuse of this button can cause transmission / engine damage. But never fear, it can easily be avoided.

ECT PWR
This little button when pressed, makes the gear shift gears much later than usual. The car is also more prone to downshifting to gain more power.

For example, your on the highway doing 100kmh or 60mph and you are climbing a hill on the highway. If you were to squash this button during this time, you will probably notice that the car will go bonkers and drop it back 2 gears and a sudden burst of torque will come from it, causing you and your lovely RAV4 to fly up the hill in due time.

This mode should only really be used on highway runs and during steep mid-speed highclimbs (such as mountain valley roads).

MANU MODE

Fairly straight forward, this mode HOLDS your gear and will not release the gear until this mode is off.

For example, you are travelling along at 60kmh or just over 35mph and you are driving with O/D set to off (3rd gear), if you decide to press MANU it will hold 3rd gear just like a manual car holding its gear and not drop the RPM unlike normal auto driving conditions when you release the gas.

This mode should only be used if you need to maintain a gear during hillclimbs or high-speed overtakes.

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What combination of settings should you use when and where you ask?

O/D OFF + PWR OFF + MANU OFF
When your car is cold, during hillclimb conditions, during peak traffic, during low speed driving conditions

O/D ON + PWR OFF + MANU OFF
Normal, everyday driving conditions

O/D ON + PWR ON + MANU OFF
During highway runs, during high-speed overtaking and during any high-speed conditions.

O/D OFF + PWR ON + MANU OFF
Extremely steep hillclimb with a heavy load with lots of variations of speeds in the road. (eg. steep mountain valley roads, scenic routes)

O/D OFF + PWR OFF + MANU ON
Whenever you need to hold a gear for a certain condition (overtaking a million cars)

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If you are finding that your car has become rather sluggish in terms of changing gears, power delivery and response, you are best off resetting your ECU. This can be done by unplugging the positive battery terminal and leaving it unplugged for approx. 30 minutes. After this, just plug it back in, start the car up, let it warm up and take it for a spin around the block a few times. During this drive around, You will probably want to floor the gas a few times from stand still to get the ECU really edging its performance. To top it off, go for a cruise on any highway at relatively highspeeds (100-130kmh or 60-80mph). As you enter the highway, you should really belt it to the desired speed then cruise the remaining of the highway for about 15 minutes. When you come off the highway, you'll notice that the car is really responsive By doing all this, you are re-teaching the car your driving style so it can adapt to it.

I hope that helps you!

From me! Have a good one!

NewLynnHse

不错

nzmike

高人啊，赞一个

KevinInNZ

收藏。。。同RAV4，太有用了

Ben87

KevinInNZ 发表于 2014-11-21 15:09
收藏。。。同RAV4，太有用了

感觉上高速有必要把O/D off关掉 其他的时候觉得没必要

KevinInNZ

Ben87 发表于 2014-11-21 15:10
感觉上高速有必要把O/D off关掉 其他的时候觉得没必要

＝ ＝之前不知道，表示上高速永远都开着O/D，然后刚拿到Rav 4的时候，车比较老，94年的，朋友瞎按了PWR结果水温直线上升。。。而且我在基督城，一片平的，不需要PWR。。。

tq02d4f

KevinInNZ 发表于 2014-11-21 15:26
＝ ＝之前不知道，表示上高速永远都开着O/D，然后刚拿到Rav 4的时候，车比较老，94年的，朋友瞎按了PWR结 ...

我也经常开pwr从来不见水温有问题那。

aries_mm

这些功能基本都是降档，用的时候小心就好，力量上来了，油量就下去了。