GolfGTIforum.co.uk
Model specific boards => Golf mk7 => Topic started by: scanesare on 10 January 2019, 14:37
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So, I've had Start Stop turned off (via the voltage method using OBDEleven) for a good 2 years now. As I am bringing the car to its original default state I went and re-activated it by setting "start stop voltage limit" back to 7.6v from the 12v it had been for 2 years.
Then nothing. In not a single case in one week's driving did it turn the car off after a stop. Temperatures are rather low lately (0-3deg C max) and I haven't been doing long trips (max 10-15min) but I don't recall it needing time to warm up or being particularly sensitive to cold?
What I can't remember right now is if when stopped (with SS activaed) I do get the crossed out A symbol, meaning that it knows it should turn off but can't due to high electrical consumption or just nothing, which would point to the direction of an actual problem?
No errors/signs on the dash neither via an OBD scan. If my battery was on its way out shouldn't I get the crossed out A at least?
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If its not going to stop because of a defined condition (there are loads but climate control hasn't achieved the set temperature, low fuel light on, battery charge too low) then you should get the crossed out A when you have the vehicle in the state that SS should kick in (clutch out, out of gear, auto hold on... some others too).
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Here you go, from the manual:
Vehicles with a manual gearbox
Disengage the gear and release the clutch pedal when the vehicle is coming to a stop, or when it is stationary. The engine is stopped.
Depress the clutch pedal to restart the engine.
Vehicles with dual clutch gearbox DSG ®
To stop, press and hold the brake pedal. The engine switches off when the vehicle is coming to a stop, or when it is stationary.
Take your foot off the brake pedal, or depress the accelerator, to restart the engine.
Important preconditions for automatic engine switch-off
The driver is wearing their seat belt.
The driver door is closed.
The bonnet is closed.
A minimum engine temperature has been reached.
m/k/a995MKVehicles with Climatronic: the temperature of the vehicle interior is within the preset temperature range, and the humidity level is not too high.
The defrost function of the air conditioning system is not switched on.
The charge level of the 12-volt vehicle battery is sufficient.
The temperature of the 12-volt vehicle battery is not too low or too high.
The vehicle is not on a steep incline.
m/k/a995MKVehicles with DSG dual clutch gearbox: the steering wheel is not turned too sharply.
The windscreen heating is not switched on.
Reverse gear is not engaged.
Park Assist is not active.
m/k/a995MKGolf R: the selector lever is not in position S or in the Tiptronic gate. The Race driving profile is not activated.
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So it has to meet the SS condition for manual or DSG and then will give a crossed out A if the preconditions aren't met, otherwise you won't get the crossed out A or stop (a non-crossed out A)
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Cheers, but for any non met precondition it should show the crossed out A symbol correct?
Thing is I don't think I saw it on the dash and that's what troubled me. Will need to double check this evening and report back.
EDIT: I was posting at the same time as you did, let me read that bit again.
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Yes if you have followed the manual or DSG instructions and don't have any of the other things happening you should get the A and if you have any of those things happening a crossed out A.
On my Mk7.5 it comes up with an "i" thing on the MIB which if you press it, it tells you why its giving you a crossed out A.
BTW for a diesel it also gives a crossed out A if its doing a DPF regen, but won't tell you that - nobody is allowed to know when a regen is happening in case you stop it!
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Ok I think we are saying the same thing. With SS activated as usual, the car should do one of the following: either stop, OR show a crossed out A.
Not stopping and not showing anything on the dash is weird, no?
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Yes, very weird.... SS button pressed and lit up?
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I'll do all my checks this evening and then report with definitive data, hold on!
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Right, so on the way home, I noticed that the crossed out A did indeed come on when I pressed the brakes really hard, good.
From the car's menu I then clicked on the Start Stop Info and after a few messages which went away (windscreen could fog, cabin not in ideal temp etc.) the only message left on was "high power consumption". Now I didn't have anything unusually power hungry on, I even turned off Clima and the stereo but still, the message did not go off for the remaining 15 minutes of drive. This is definitely not normal.
Plugged the OBDEleven in, checked "battery charge status" and it showed 54% :huh: That's pretty low right? Could a low battery be related to the car always finding it's not having enough power to engage start-stop?
Bit of extra info:
Around 1.5 years ago I forgot to de-activate OBDEleven during the night which left the CANBUS busy for around 12h and me waiting for road assistance to come and charge the battery as nothing would work (had to unlock car by physical key and the dash was a true error-fest). After that incident I remember that it never showed over 70% charge and even after long drives when it would hit 85%, next day it would be down to 65%. But never as low as 54%.
Guess the inevitable is on its way? Anyway, went and bought a DEFA SmartCharge (the smaller 4A model) and left it charging just to see if this will cure the "high consumption" message even temporarily. I wanted to buy a charger since a long time just for being able to play with VCDS mods in my garage without having to worry about battery dying on me again so there I got the excuse. Thoughts?
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It’ll stop-start faultlessly after the charge. Time will tell if the battery holds the charge...
Why do you want to bring the car back to default state? Selling up?
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It’ll stop-start faultlessly after the charge. Time will tell if the battery holds the charge...
Why do you want to bring the car back to default state? Selling up?
Yeah I guess I can only charge fully and see how it goes.
Answer to your question is: Yes. Funnily, car has been practically flawless for 2.5 years since new, when I decide I need to move on I get: a) Ambient temperature sensor failure (shows 3-4 degrees higher than real temp but no sign of physical damage) b) Low coolant (ok it's done it in the past too) c) Start-Stop not working (probably battery being too low) d) message to replace key fob battery all within 2 weeks :grin:
Surely it's trying to tell me something?
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Not heated seats on was it?
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They were for the first 5 min of the trip but turned off after, so they shouldn't be responsible I think.
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My start stop rarely kicked in just showedthe crossed out A. When I was getting some bits retro fitted the gent said my battery was poor so got it replaced and the start stop is back. Mine is a 63 plate and only gets used every other week so expected the battery not to be at its best.
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It’ll stop-start faultlessly after the charge. Time will tell if the battery holds the charge...
Why do you want to bring the car back to default state? Selling up?
Yeah I guess I can only charge fully and see how it goes.
Answer to your question is: Yes. Funnily, car has been practically flawless for 2.5 years since new, when I decide I need to move on I get: a) Ambient temperature sensor failure (shows 3-4 degrees higher than real temp but no sign of physical damage) b) Low coolant (ok it's done it in the past too) c) Start-Stop not working (probably battery being too low) d) message to replace key fob battery all within 2 weeks :grin:
Surely it's trying to tell me something?
Hopefully you didn’t name your car Christine.......
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It’ll stop-start faultlessly after the charge. Time will tell if the battery holds the charge...
Why do you want to bring the car back to default state? Selling up?
Yeah I guess I can only charge fully and see how it goes.
Answer to your question is: Yes. Funnily, car has been practically flawless for 2.5 years since new, when I decide I need to move on I get: a) Ambient temperature sensor failure (shows 3-4 degrees higher than real temp but no sign of physical damage) b) Low coolant (ok it's done it in the past too) c) Start-Stop not working (probably battery being too low) d) message to replace key fob battery all within 2 weeks :grin:
Surely it's trying to tell me something?
Hopefully you didn’t name your car Christine.......
:grin:
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Forgot to update: So left the car charging overnight. In the morning, the charger's LED showed only 4/5 lights fully lit and the 5th one still blinking which according to DEFA's manual indicates voltage is between 12.55V - 12.65V and battery status max 80%.
I believe this shouldn't have been the case with a good battery given it was left charging for like 14hr. Start-Stop started working again immediately but after a day's usage and overnight parking the charge status dropped again to something like 58% and SS became again unavailable.
At this point I believe the battery is on borrowed time, and that at one point sooner or later I will walk up to the car and find it unable to start. Since I am in the process of selling the car I will simply make sure the buyer is aware of it but isn't it a rather short time for the battery to go? Just 30 months of ownership? On the other hand I wonder whether that drain incident around a year ago (when the OBDEleven was left working the CANBus all night) took its toll on the battery so maybe not a representative example of how long stock batteries will last on these cars.
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From what I understand, the start/stop battery is much more powerful and expensive; is yours the right one?
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From what I understand, the start/stop battery is much more powerful and expensive; is yours the right one?
Can't imagine why it wouldn't be as it's the one that the car came with from factory.
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Oops, my bad! Thought it was a replacement. :nerd: