grbac
Junior Member
Posts: 51
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Post by grbac on Sept 6, 2022 6:46:40 GMT
So today I noticed that the air blower works fine on all speed settings, but sometimes, when the speed is on 4 and above the fan just starts blowing Max on 3rd speed setting and won't blow more even if it on 6 and throws a Blower reduction due to energy menegment B10CE00 fault. Is this the blower resistor/blower or something else?
OBDeleven vehicle history log
Date: 2022-09-06 08:46:02
VIN:
Car: Volkswagen Golf GTI Sport
Year: 2017
Body type: D5 Hatchback
Engine: CXCB kW ( hp) l
Mileage: 44336 km
---------------------------------------------------------------
08 Air Conditioning
System description: AC Manuell
Software number: 5GM907426E
Software version: 1801
Hardware number: 5GM907426E
Hardware version: H03
Faults:
B10CE00 - Blower reduction due to energy management
static
Priority - 6
Malfunction frequency counter - 1
Unlearning counter - 55
km-Mileage - 43912 km
Dynamic environmental data - 02868727BE9F01
date - 2022-08-29 19:55:44
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Post by carlosrocha on Sept 11, 2022 18:33:57 GMT
First sorry for the english, I'm using google translator. I had the same problem, but in addition to this problem with the air conditioning, my car stopped working the start stop and the rpm was always at 1000 at idle. I searched a lot for what it could be and didn't find it. until one day, I turned off the sensor that is on the negative cable and the air conditioning returned to normal, the rpm stabilized again at 720 at idle, but the startstop was still inactive. Do this test, because it is probably a problem in this sector in the negative battery cable.
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grbac
Junior Member
Posts: 51
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Post by grbac on Sept 28, 2022 23:29:24 GMT
Hi,
thank you for helping out, I'll try it whenever I have the chance and report back.
Have a nice day
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Post by dv52 (Australia) on Sept 30, 2022 0:18:26 GMT
hmm....... I would caution against "turn[ing] off the sensor that is on the negative cable". This is the battery monitor control module and its job is to supply a continuous stream of battery data to the car's Energy Management System (EMS). Yes, "turn[ing] off the sensor that is on the negative cable" will turn-off Start Stop - but it does this by telling the EMS that the battery condition is unknown - so the EMS doesn't know whether there is sufficient capacity to turn-on the engine again if it turns the engine off. Result = Start Stop is disabled!! However, the EMS on a MQB platform car is very sophisticated- apart from controlling Start Stop, the EMS also controls the charging profile of the battery over its life. It uses the data stream from the battery monitor module to maximize the longevity of the battery. If this data stream is missing - there will be a consequential impact on this function!!
Don
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grbac
Junior Member
Posts: 51
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Post by grbac on Sept 30, 2022 11:23:31 GMT
Hi Don,
the thing is that I don't even have Start-Stop in my car. I just want to get to know on how to diagnose this problem before I go on buying replacement parts like the blower resistor/blower motor.
Is there a possibility that it's a battery problem? Every time I check with OBDeleven with the car being "not fully ON/running", the little battery voltage thing in the obd app shows around 11.4V and when running it shows from 13.0V to 14.5V
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Post by dv52 (Australia) on Sept 30, 2022 22:30:12 GMT
grbac : OK - If your car doesn't have SS, then almost certainly it most likely will not have "the sensor that is on the negative cable". Your car will have a simplified EMS.
At face value, those voltage readings don't suggest a bad battery (remember that OBD11 is NOT measuring volts at the battery terminal - it's reading the rail voltage on pin #16 on OBD port- which will be lower because of VD ("Volt Drop", not the sexual disease!!). I suspect that making a link between the DTC and battery volts might be drawing a long bow (no offense intended)!!!
If you look at the fault descriptor- it strongly suggests (to me, at least) that the decision to throttle-back the blower function is because of the EMS.
Now, remote diagnosis on forums like this is prone to many, many, many problems and the only basis for someone typing on a keyboard on the other side of the planet to make a judgement about the cause of this particular fault is this one piece of information.
So- whilst acknowledging that anything is possible, my hunch (emphasis on "hunch"- or better described, "guess") is that the more likely cause here is that the EMS has made this decision because of a confluence of driver/environmental conditions.
To explain - If the car is driven hard at the same time that the climate control function is battling to maintain the cabin temperature because of high/low ambient conditions - a decision must be made by the EMS as to where to direct limited engine-power. In these conditions, the EMS will restrict climate control and direct the limited engine-power to the drive-train!
The freeze-frame data in your extract of the fault says that the period between first registration of the error and the date of the report is 7 days. Malfunction frequency counter - 1 means that in this period, the fault has not reappeared on a subsequent ignition cycle. Priority - 6 means that this is a low priority matter
Again, with the restrictions noted above about this being a hunch, I suggest that you clear the error message and keep track of any further occurrences (and take note of how the car is driven during elevated weather conditions)
Don
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grbac
Junior Member
Posts: 51
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Post by grbac on Dec 12, 2023 1:10:00 GMT
Sooo. I forgot about this post and forgot to say that the problems were gone as soon as I cleaned the connection of the ground cable behind the battery, bolted to the chassis. So before that, I did look a couple of times at the ground connection, but by the looks, it was clean, no dirt, corrosion or anything, even when I removed it, but then I decided to clean it even if it looked ok, so I sprayed it with some "electrical cleaning spray" and brushed it with a hard brush, but not hard enough to scratch the paint, sprayed it with some brake cleaner and put everything back to place. Since that day, everything works like it should.
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