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Discussion Starter · #1 ·
Hi, we have a 12/18 EC that will not hold cruise control spend on undulating roads.If set to say 110 it will slow going down a gentle hill to say 94, stay there on the up hill for a few seconds then race to 118 well over the set speed setting.This is when the radar cruise is not picking up vehicles close by. The other problem is the emergency braking ,when set on cruise control it will activate the brakes by its self when you are merging from two lanes to one lane.It seams to pick up the vehicles coming from the opposite direction and jams on the brakes.Both these problems have been raised at the selling dealer who says that they are not a problem.No so good with a truck on your tale, location is Victoria Australia
 

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There is a software update for the ACC/FCM on this model. Have you had yours done? If you have been to dealer for service, then they would/should have done it automatically.
 

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Discussion Starter · #3 ·
Hi, it was serviced 6 weeks ago,i did ask about any update and they said there was none,i will ask today, thank you
 

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Hope you get it sorted out okay Wassa, not a good situation at all. Must admit I have not used the cruise control all that much these days, as I find it more comfortable to just drive normally and be in control of things.
Please let us know how you get on and whether we should all be concerned about this issue.
 

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Discussion Starter · #7 ·
Thank you, i spent an hour with the service manager and watched him connect the lap top to the car.All updates were done and showed no issues.He did note that the issues i have are covered in the instruction manual and make it impossible to get them fixed as it says things like don,t use cruise on hilly roads as it won,t be able to maintain speed and the same with emergency braking as that many thinks noted affect the outcome.Strange that the Mazda cx5 set up which i drove for a weekend had None of these issues., cheers from Oz
 

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If my car did that (emergency brake for no reason) I'd be thinking everyday to get rid of car. Forget updates.

I was looking around the engine bay yesterday and underneath the car and it did appear like some effort was made, torque marks everywhere, hopefully for quality control. It's surprising to hear shit like this.
 

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I've seen some of this, but not so extreme. And, it's usually on a rainy day which seems to confuse the radar/camera for both lane drift and collision sensing -- I would assume the adaptive cruise would be equally affected if I used it more often. In my neighborhood there is a road that is fairy straight that dips and takes a left bend right as I approach my turn. This is a residential neighborhood so people park on the street and if anyone is parked on that inside curve, I almost always will see the BRAKE warning light as I approach.

From a technical standpoint, it's doing exactly what it was designed for. I am travelling in a straight line and approaching a stationary object. The car doesn't "see" the upcoming curve, or the approaching decline so it thinks I am headed for a collision. If I kept straight I would hit the car, but I follow the curve to the left and the light goes out. It never engages the brakes, just issues the warning.

On rainy days, there are a few hills that have triggered the brake warning as I approach the bottom. I suppose the road surface is more reflective to the radar when wet and the car thinks the bottom of the hill (and subsequent rise) is actually an obstacle in front of me, until the road levels out enough so the reflection is no longer there. I could see adaptive cruise doing the same thing and slowing you down when there is no one in front of you.
 

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Hi, we have a 12/18 EC that will not hold cruise control spend on undulating roads.If set to say 110 it will slow going down a gentle hill to say 94, stay there on the up hill for a few seconds then race to 118 well over the set speed setting.This is when the radar cruise is not picking up vehicles close by. The other problem is the emergency braking ,when set on cruise control it will activate the brakes by its self when you are merging from two lanes to one lane.It seams to pick up the vehicles coming from the opposite direction and jams on the brakes.Both these problems have been raised at the selling dealer who says that they are not a problem.No so good with a truck on your tale, location is Victoria Australia
Hi Wassa, my Esteem is experiencing emergency braking (with and without cruise control) which is due to oncoming traffic. Braking has been harsh enough to put my car into a skid. How did you go getting this issue attended to? Was it resolved?
 

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Hi, we have a 12/18 EC that will not hold cruise control spend on undulating roads.If set to say 110 it will slow going down a gentle hill to say 94, stay there on the up hill for a few seconds then race to 118 well over the set speed setting.This is when the radar cruise is not picking up vehicles close by. The other problem is the emergency braking ,when set on cruise control it will activate the brakes by its self when you are merging from two lanes to one lane.It seams to pick up the vehicles coming from the opposite direction and jams on the brakes.Both these problems have been raised at the selling dealer who says that they are not a problem.No so good with a truck on your tale, location is Victoria Australia
I have a MY21 Eclipse Cross, I have experienced the same braking under cruise control many times. The car is under 2 months old. I too have been break checking vehicles on merging at 110km/hr including a b-double doing 110km/hr when my car slowed to 40km/hr, with no oncoming cars or cars in front of me. Other issues include stopping in the right lane for a car turning left in the third lane from me. I am terrified. My service people are guessing it is a camera calibration or radar calibration issue, unheard of ever before. I have also slowed down for a big dark tree off the side of the road and tree shadows. I am not confident they will solve it, having seen it is NOT new.
Russ
 

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Discussion Starter · #12 ·
Hi Wassa, my Esteem is experiencing emergency braking (with and without cruise control) which is due to oncoming traffic. Braking has been harsh enough to put my car into a skid. How did you go getting this issue attended to? Was it resolved?
No new updates at this stage,service department cant help they say.Couple of days ago we we nearly rear ended again while on cruise as it detected old lines from years ago.Camera has been replaced in windscreen but just the same.Cruise is useless as in wont hold a speed on any undulating road in it will under speed by 10 k the over speed by 10.
 

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No new updates at this stage,service department cant help they say.Couple of days ago we we nearly rear ended again while on cruise as it detected old lines from years ago.Camera has been replaced in windscreen but just the same.Cruise is useless as in wont hold a speed on any undulating road in it will under speed by 10 k the over speed by 10.
Hi Waze, I believe mine isn’t seeing lanes to make these bad decisions, not seeing cars coming towards me either. Just making bad decisions like stopping when cars in right lane (straight road) slow to turn right at intersection, and other problems.
Tomorrow car is in for service. Camera and radar to be calibrated. I took my dash cam off because they said it and e-tag may cause issues, still happens.
Wish me luck!
Russ
 

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No new updates at this stage,service department cant help they say.Couple of days ago we we nearly rear ended again while on cruise as it detected old lines from years ago.Camera has been replaced in windscreen but just the same.Cruise is useless as in wont hold a speed on any undulating road in it will under speed by 10 k the over speed by 10.
Wazza, I forgot to mention, with bright sun on my windscreen I can see some zones of the windscreen has crazing in the glass. It is quite extensive and may cause multiple images of it is in front of the camera.
Russ
 

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I took my dash cam off because they said it and e-tag may cause issues, still happens.
I initially had issues with my EC Exceed with my e-tag. So much so, I used to keep the tag in the console and hold it near the window when needed but recently I had it replaced with an upon-to-date version and I no longer have issues with errant reports. The new tag is larger and may have better shielding but I used it yesterday on motorways in Sydney attached to the window near the sensor/cameras. The beep on the new tag is louder and more easily heard as well...
 

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Discussion Starter · #16 ·
Hi Waze, I believe mine isn’t seeing lanes to make these bad decisions, not seeing cars coming towards me either. Just making bad decisions like stopping when cars in right lane (straight road) slow to turn right at intersection, and other problems.
Tomorrow car is in for service. Camera and radar to be calibrated. I took my dash cam off because they said it and e-tag may cause issues, still happens.
Wish me luck!
Russ
Good luck with your issues.If you have some positive results let me know so i can pass it on to the service manager, cheers
 
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