Clubjazz - Honda Jazz & HR-V Forums
Honda Jazz Forums => Honda Jazz Mk4 2020 - => Topic started by: aschoots63 on February 01, 2026, 02:50:49 PM
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Hello all,
My wife loves her Mk4 Jazz, but is very disappointed the ACC (which doesn't function well in wet and/or cold weather) can't be switched off to function as an old school basic CC, just keeping a steady speed. Technically this should be no problem, but Honda has decided nobody would need this option.
Does anybody know if the ECU can be tweaked somehow to create a basic CC functionality?
cheers, Alex
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wrong thread
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I abandoned ACC and used LIM instead
Not quite the same but perfect in average speed zones
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Not "not quite the same", but something completely different.
I find ACC (almost) ideal, but of course only in situations where it is suitable and when conditions allow correct operation.
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Its personal choice but I too find Adaptive Cruise Control much more useful than basic CC .
CC is no great advancement on what some cars had over 100 years ago.. A hand throttle saving the bother of having to press a foot pedal all the time. ACC is smarter. ;D
As with all driver aids you do need to supervise ACC to ensure its appropriate for the conditions and doing the right thing. But at least ACC does clever stuff such as adapting to the speed of other traffic. Basic CC can plough on at its set speed like a Zombie and maybe rear end the vehicle in front.
Sometimes an alert driver may spot hazards before ACC. Such as another driver looking like they are about to make a sudden lane change. You intervene. Simples. Not so very different from having to intervene when basic CC is carrying on regardless. (ooh Matron ;D ) IMO
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I found ACC a royal pain
It would brake and accelerate when I least expected it
I only ever used it in average speed zones to ensure I didn't accidentally overdo it
Even though I had it set to the longest distance it would frequently brake when I was pulling out, well in advance, at least 6 car lengths, and would frequently brake even when I was in a different lane and roughly in the vehicles blind spot. Almost like the camera thought I was on a collision course
I tried it at least 4 ok 5 times before giving up. I can only assume my camera was either out of alignment or the 'cone' was set too wide
My Civic had plain old CC and that worked perfectly. I was able to overtake without issue whilst maintaining my set speed. If I needed to slow down then a dab on the brake and it turned off and I had control.
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I found ACC a royal pain
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Even though I had it set to the longest distance it would frequently brake
And this is where things (uh...you?) went wrong.
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I didn't put that very well
It was set to ignore anything until I was on top of it
At the time I did read the manual and had it set accordingly
Same with the CMBS, had that set to not react until I was very close and that never kicked in
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I guess as often happens with drivers aids threads we are each putting our 'marmite' opinions. Either love it or hate it.
I accept some may find the Jazz ACC might not be as good as they had on their "Audi Doody" or whatever. (BTW There is no Audi Doody ,its my attempt at Humour based on the old American colloquial greeting "Howdy Doody" ;D) VAG cars for instance may use radar/lidar detectors that perform better in rain and fog. I can see potential advantages of a system that can 'see' further than a human in fog/heavy rain ,but does it then go beyond where a human can see well enough to supervise it? If so it becomes a 'driverless car' using technology thats not yet adequate for that role. Equipped cars may be travelling much faster than human controlled cars. Maybe their drivers will go one step further with hands off the wheel, dozing or concentrating on phones etc. I dont see that the ability to set basic CC so the car can travel at speed through poor or deteriorating/fluctuating weather without any detection is an advantage.
Supervising ACC does require some effort and learning its foibles. Maybe more than you can learn in 4 or 5 attempts. I learned to work 'with 'it. Indeed in heavy traffic I find it less 'work' to switch it off and drive ,manually. So I agree there is room for improvement. I find traffic around SE UK is often too heavy to use it much. But on long hauls on quiet to moderately busy motorways I find it a welcome 'assistant'.
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I guess as often happens with drivers aids threads we are each putting our 'marmite' opinions. Either love it or hate it.
I concur (guiltily) - I have to admit that my driving style has improved (safety wise) since driving the Jazz with its "nannying" systems engaged.
I found myself to more frequently use indicators and to better "keep to my lane" than before.
So: For me at least some of the "hated" assistants helped me to better my driving.
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I dont use ACC as the majority of my jazzing around are on A and B roads. Longer motorway journeys seem to be congested with middle lane crusiers or folk who ‘merge’ into your ‘two second rule ‘ space i leave in front of me.. ACC is however clever tech !
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*If* Honda ACC works, it's fine. But the in wet / cold weather the system cancels too often. In those cases it would be nice if you could opt to switch to good old proven simple / basic / robust Cruise Control.
And... exacly that is possible in the USA Fit (Jazz): https://www.verneidehonda.com/honda-adaptive-cruise-control-acc/
Quote: There may be times when you don’t want the low-speed follow feature engaged while driving. Luckily, Honda makes it easy to turn this feature off in only a few seconds. Press and hold the intervals button for one second.
Why can't Honda activate this option in the EU / UK?
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..it would be nice if you could opt to switch to good old proven simple / basic / robust Cruise Control.
And... exacly that is possible in the USA Fit (Jazz): https://www.verneidehonda.com/honda-adaptive-cruise-control-acc/
The only problem: in the USA there is no Jazz/Fit anymore since the introduction of the Jazz/Fit e:HEV... (https://www.cheesebuerger.de/images/midi/traurig/a045.gif)
So this: "And... exacly that is possible in the USA Fit (Jazz)" seems to me NOT possible...
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i use ACC on A roads, some b roads and definitely on motorways. It works well for me, makes every trip more relaxing. :). I would not anymore buy a car without ACC