Clubjazz - Honda Jazz & HR-V Forums
Honda Jazz Forums => Honda Jazz Mk4 2020 - => Topic started by: Ceej on November 22, 2021, 07:06:04 AM
-
Hi. We have a March 2021 Crosstar. Have read the manual, tried all different combinations off long pressing various buttons and the brake pedal (when stationary :-)) and have searched on here, but cannot seem to find a bog standard cruise control set up.
Does it exist on this car? Not a big fan of cruise control anyway as it can't see past the car in front of you, but just occasionally would like to use it. As it stands, the system is redundant to me!
Great car otherwise, apart from a month of having no DAB for some reason.....
-
There is no plain CC, only ACC, which, like you, some of us find a pain.
I use the LIM function to stop me drifting over the Specs controlled motorway roadworks sections and LIM works well for me.
-
After an early scare while using ACC, I'm starting to use it again; so far, no problems. Yesterday, there was a single car parked well out into the road. I was half expecting ACC to see the parked car as a problem and force my car to brake but no, the parked car was ignored.
-
Is there any consensus on best distance setting for ACC ?
-
Is there any consensus on best distance setting for ACC ?
I've been setting mine to a middle distance lately. If you have long distance set, cars behind you will keep seeing your brake lights going on for no apparent reason as the ACC reacts to the vehicle that may be well ahead of you. This is likely to encourage the following car to overtake you.
-
M25 = 1 bar setting, unless you want the space to be filled in front of you.
-
I can understand preferring not to use ACC and controlling speed yourself with a limiter
But not the objection to ACC vs CC. Both systems should be used with discretion and both require constant driver attention and periodic intervention .
Some may fear that ACC is a bit too ' self driving 'and may lead to attention complacency. It may for some , but its up to the driver not to let it happen.
Some may dislike how the car sometimes brakes slightly when following the vehicle in front . This may be a tactile
reminder its working, and can help keep you alert.
If you fail to react and intervene when required with CC the car WILL continue at the same speed regardless of the hazard. With ACC it usually will not. A useful safety backup.
Why not set ACC but drive the car as if its only CC, using the same level of driver attention required for CC? As you reach slower traffic YOU take control of speed by cancelling the ACC with a dab on the brakes just before the point when ACC would otherwise intervene. Then either reset speed or resume ACC when circumstances allow. This may seem extra work, but its what you would have to do anyway with basic CC. With the added advantage that if ACC beats you to it you know your attention may have lapsed.
Set the following distance bars for a distance that is still safe as a back up but allows you to intervene first more often than not.
-
M25 = 1 bar setting, unless you want the space to be filled in front of you.
with traffic this heavy its better not to use ACC at all. The driver attention needed to ensure ACC is always doing the right thing exceeds that required for doing it yourself.
-
M25 = 1 bar setting, unless you want the space to be filled in front of you.
That's interesting because I always had mine on one bar and there was certainly a larger gap than you intimate.
-
The automatic brake when using ACC a
seems far too quick to action. It's not a feathering at all. A simple CC system allows you to take a few mph off when seeing what the car 2 or 3 places in front of you is up to.
There is far too much brake light action on the motorway these days. It causes tailbacks and ultimately can cause accidents.
Things feel safer, more planned and smoother away from the Jazz's ACC. Just my view.
-
I think Lord Voltermore sums up things very well. I still get the sense that people are using CC and, of course, ACC in situations where it is inappropriate. I'd go as far as to say that, in the UK, the situations where you can safely use CC are very limited - not bad weather, not heavily congested motorways etc etc. It's all in the manual.
I use it very very sparingly. Long journey, right leg a bit stressed, motorway with light traffic, otherwise I genuinely don't see the point. I have driven in the USA and that is natural CC territory where traffic is often very light (apart from urban areas).
Never used the speed limiter - I might give it a go.
-
The automatic brake when using ACC a
seems far too quick to action. It's not a feathering at all. A simple CC system allows you to take a few mph off when seeing what the car 2 or 3 places in front of you is up to.
There is far too much brake light action on the motorway these days. It causes tailbacks and ultimately can cause accidents.
Things feel safer, more planned and smoother away from the Jazz's ACC. Just my view.
Fair points. Its 20 years since I last had a car with basic CC so maybe they have evolved since then and I am missing something about the comparative ease of changing speeds.
Of course a driver should pay attention to what vehicles are doing 2 -3 cars ahead which gives more reaction time to modulate speed more gradually with better spacing. Drivers or their driving aids only reacting to the vehicle immediately in front does lead to an accumulated chain reaction of late panic braking.
In light traffic you may have time to modulate your speed by a few mph by changing the set speed. Even with ACC. Not sure how CC would be any easier here .. A driver would still need to look and plan ahead. If traffic levels make this too much faffing around its time to switch ACC off. .
I was wrong to say cancel ACC by dabbing the brakes. unnecessary brake lights is not a good idea, although IMO less of a problem in conditions suitable for using ACC - ie light well spaced traffic. Better to hit the cancel button.
I think I read somewhere that although heavy braking by the collision avoidance systems does activate brake lights braking for ACC speed moderation only applies them if retardation is severe enough to need them.Which is not normally the case. I might be wrong. If necessary try to pre-empt the systems likelihood of braking.
-
If you bring up 'Simple View' you can see when the brake lights are coming on.
-
That was another issue I had with ACC. I like to know when my brake lights come on. It must be really infuriating to a following driver if you're constantly displaying brake lights.
I've used it enough times to know it's not for me.
-
That was another issue I had with ACC. I like to know when my brake lights come on. It must be really infuriating to a following driver if you're constantly displaying brake lights.
I've used it enough times to know it's not for me.
I've often wondered about that too. I actually like ACC and LKAS together (found it good so far) but thought the same.
-
I think I read somewhere that although heavy braking by the collision avoidance systems does activate brake lights braking for ACC speed moderation only applies them if retardation is severe enough to need them.Which is not normally the case. I might be wrong. If necessary try to pre-empt the systems likelihood of braking.
Isn’t that the same as any other car? If you simply lift your right foot and allow engine braking to slow you down, then there are no brake lights (although an advanced driver may touch the brake pedal lightly in order to warn any following drivers). So surely ACC is just mimicking that? Or are you saying that ACC applies the brakes - and the brake lights - every time it decides it’s getting too close to the car in front?
-
From my experience, the unexpected reduction in speed was certainly more than engine braking, especially as to use ACC you need to be in 'D'
-
You expect it to brake when traffic ahead suddenly slows significantly . But yes there are times when it brakes slightly when an alert human would have anticipated the need to slow earlier and eased off the throttle without needing to brake.
Its not severe and its not always but,as Kremmen says, its more than just engine braking. It can feel a bit strange at first having something else braking for you when you dont expect it. I've not had it happen often enough to analyse when it might happen, or its possible affect on following vehicles.
Its partly due to the fact a human can react proactively by reading the road well ahead. The the aid can only react to what its sensors 'see'.
This also shows when a car suddenly enters your lane close in front. An alert driver may spot its about to happen , due to driver behaviour ,indicators etc reacting even before the car has left its own lane. The 'system only spots it once the car is well into your lane . A driver with good hazard perception may notice a perceptible delay between the need to react and when the system reacts .Its only a fraction of a second delay but enough that a human might react a couple of metres sooner in distance covered than the ACC ,which then needs to compensate by braking that much harder. . Its better than nothing. Basic CC wouldn't react at all. (At 70 mph a car travels 31 metres per second. ,or 4 metres per second if there is a speed differential of 10 mph. That's a cars length.)
I'm not criticising it as such. I'm not sure how with current technology it could be improved. It cant think ahead like a human. Maybe a faster 'refresh ' rate on the sensor. But it does illustrate the need for the driver to remain alert and in control, and only use it with discretion depending on traffic and weather conditions.
-
When I had my scare while using ACC I wished that it had a narrower field of vision; the system sensed a slow moving vehicle that was in the lane to my left. Later, it detected a lorry that was parked in a layby. Both times the brakes were applied hard.
-
I had similar and I found that if I was plumb square in my lane then it worked as intended, albeit further back than I expected, but when changing lanes it seemed to read other lane traffic so as you say maybe the beam is too wide.
-
When I had my scare while using ACC I wished that it had a narrower field of vision; the system sensed a slow moving vehicle that was in the lane to my left. Later, it detected a lorry that was parked in a layby. Both times the brakes were applied hard.
That sounds more like the kind of thing the Collison mitigation braking system CMBS might do. The fact you had ACC on may just be a coincidence.
On fast A roads you may quite legitimately pass parked trucks quite close, and even on motorways you may be approaching the vehicle ahead quite rapidly knowing you have the overtake safely planned. But this could 'spook' the CMBS which may 'assume' a collision is possible. I've only had this happen once so far with a stopped bus. I approached at a speed consistent with knowing I could pull out to overtake once past a traffic Island . The CMBS panicked a bit. :o
You can reduce the sensitivity of the CMBS between Far normal and near. (page 155 on line manual) Or even switch it off.
ACC may be getting unfair flack.