CrispyEdd
Member
THink it uses the external temp sender for aux heater, is this not air intake to engine? Just guessing?
Electric Aux Heater retrofit
- Thread starter fyrstyk
- Start date
PlasticMac
Member
Edit: I don't have any info on the electric at heater controller, but the "rules" will be the same as the Webasto, but I'd expect it to use the car's ambient temperature sensor.
Mac.
Editted for clarity.
Mac.
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PlasticMac
Member
Do check Group 16, Block 2.
Unless it's a row of eight 0s (zeros), the aux heater won't run.
If there are any 1s, the conditions list is:
xxxxxxx1 = Coolant Temperature above 80.0 °C
xxxxxx1x = Generator Malfunction
xxxxx1xx = Battery Voltage too Low
xxxx1xxx = Engine Speed too Low
xxx1xxxx = Start Delay active
xx1xxxxx = System Malfunction (G62 OR G72 FAULTY)
1xxxxxxx = Ambient Temperature above 5.0 °C
Mac.
Unless it's a row of eight 0s (zeros), the aux heater won't run.
If there are any 1s, the conditions list is:
xxxxxxx1 = Coolant Temperature above 80.0 °C
xxxxxx1x = Generator Malfunction
xxxxx1xx = Battery Voltage too Low
xxxx1xxx = Engine Speed too Low
xxx1xxxx = Start Delay active
xx1xxxxx = System Malfunction (G62 OR G72 FAULTY)
1xxxxxxx = Ambient Temperature above 5.0 °C
Mac.
stevec
Member
HI All
Just checked engine group 16 block 2 and have this code.
It is 10 degrees outside and car has not been used since friday
11000001
Ambient temp above 5 degrees.
Checked G62 engine coolant temp sensor and this appeared to be showing correct temperature and rose with engine at idle?
What is the second digit of the code and where is the coolant temp sensor taken from?
Thanks
Steve
Found some more info referring to last digit and it seem to reference either a coolant temp above 70 degrees C or intake air above 5 degrees C.
Will have to check this on a colder day me thinks
Just checked engine group 16 block 2 and have this code.
It is 10 degrees outside and car has not been used since friday
11000001
Ambient temp above 5 degrees.
Checked G62 engine coolant temp sensor and this appeared to be showing correct temperature and rose with engine at idle?
What is the second digit of the code and where is the coolant temp sensor taken from?
Thanks
Steve
Found some more info referring to last digit and it seem to reference either a coolant temp above 70 degrees C or intake air above 5 degrees C.
Will have to check this on a colder day me thinks
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bit 2 in the 8 digit readiness code (at least on my BHC engined car) switches from 0 to 1 when you activate the "Econ" button on Climatronic - ie the red light is on, and vice versa. It is also permanently on 1 when the engine ECU is on code 00005 rather than the standard 00002.
stevec
Member
Hmm mine doesn't change when i activate econ. Just checked and changed engine ecu setting back to 000002.
Still have 10000001 showing in engine group 16.
It is 10 degrees out so that would account for 1st '1' , Assuming an other audi site is correct in saying that the last '1' is either coolant temp above 80 or air intake temperature above 5?
Looks like i have to wait for the next cold morning.
Thanks
Steve
the workshop manual advises using a cryogenic spray of some description, although an easier option would be to unclip the external temp sensor from its mount and dunk it into a glass of iced water - presume you'd need to unclip the lower grille to gain access to that area though.
Unless very unusual situation though 00002 engine ECU code is imperative.
1st and last bits are either coolant or external temp complying with requirements but I can't remember which is which. It is quoted often enough in various diagnostic threads here and elsewhere ; however, all need to be 0 for Webasto (or electric heater) to be active.
stevec
Member
Interstingly my coolant temp was showing 46 degrees yet there was still a 1 at the last digit. Looking on another audi site they say that intake air temperature affects this as well.
Apologies. Just jumping in on this post since us petrol guys are left out on this "diesel only" webasto auxillary heating...
I've seen more modern VAG cars can be retrofitted with an electrical heater matrix which is slotted in the heater box. Is this possible?
Here's an example:
I've seen more modern VAG cars can be retrofitted with an electrical heater matrix which is slotted in the heater box. Is this possible?
Here's an example:
Volkswagen Polo Heater Matrix Radiator Core 6q0963235b Mk4 1.4 Diesel 05-2009⪠| eBay
Item Specifics:2005 - 2009 - MK4 - 1.4 DIESEL - HEATER MATRIX - WITH AC - 3 PIN PLUG - PART NO 6Q0963235B - D0467976. POLO 2005 -2009 HEATER CORE. POLO 2002 -2005 HEATER CORE. IBIZA 2002 -2009 HEATER CORE.
www.ebay.co.uk
There is an electric additional heater stuffed into the HVAC unit of later BHC- and ATL-engined cars (and possibly some very late AMFs) in place of the Webasto. Consequently they are also fitted with 140A alternator rather than the 120A supplied with Webasto-fitted cars. So the component exists, and probably the space required.Apologies. Just jumping in on this post since us petrol guys are left out on this "diesel only" webasto auxillary heating...
I've seen more modern VAG cars can be retrofitted with an electrical heater matrix which is slotted in the heater box. Is this possible?
Here's an example:
Volkswagen Polo Heater Matrix Radiator Core 6q0963235b Mk4 1.4 Diesel 05-2009⪠| eBay
Item Specifics:2005 - 2009 - MK4 - 1.4 DIESEL - HEATER MATRIX - WITH AC - 3 PIN PLUG - PART NO 6Q0963235B - D0467976. POLO 2005 -2009 HEATER CORE. POLO 2002 -2005 HEATER CORE. IBIZA 2002 -2009 HEATER CORE.www.ebay.co.uk
I assume they could be fitted to a petrol-engined car but suspect that the wiring required is (like most other things in an A2) not physically present unless it was required.
An after market coolant heater like a Defa / Calix could be fitted to a petrol-engined A2 although that's not the same as what you're asking. Defa do have a heater specifically for 1.4 petrol-engined cars, but it is a direct block heater that bolts onto the back of the engine block using a pre-existing bolt rather than a coolant heater.
PlasticMac
Member
The heater is part 2, and part 7 is a version specific to the electric heater.
Mac.
Mac.
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PlasticMac
Member
There are two relays, one for each element. I think they are driven directly from the engine ECU, the last two blocks, (3&4), of Group 16.
So very simple. Must have been a huge cost saving over the Webasto.
Mac
Yes I expected that but would that not mean altering the ECU map as the function will not be present with a petrol ECU?
Andy
PlasticMac
Member
Ahh, yes. I considered fitting it to The FSI, with manual control, (a two position switch), but the electrical load put me off. It's brutal, 70-100 amps, (500 1500 watts).
My current plan is to fit a mains powered, pumped coolant pre heater, which will circulate round the small, (cylinder head, and heater matrix), circuit.
Mac.
I was thinking one of these could be rigged-up directly to the battery with a low current circuit triggering a relay via a dash switch. The aim is more to clear the windows rather than make the interior toasty.
What's the part code please?
Mac is spot on, two ECU pins on the EDC15 diesel ECU to control it. You don’t have those pins, or functionality on a petrol.
I may look into a CAN module that can control this if there is any interest.
A bit of trivia, in the ECU it’s called “Kühlmittelheizung” - “Coolant Heating”. Obviously we all know about Webasto, but there was another system used on some Golf MK4’s (maybe others) that used 3 glow plugs in a coolant manifold. That system is what I imagine this feature was originally intended for, hence why it considers generator load and battery state.
The third system is the electric PTC heater you’ve been discussing. Doesn’t heat the coolant, but is cheap and probably faster at heating up the driver.
As for part number, I can check later. You also need the lower housing as it’s different
I may look into a CAN module that can control this if there is any interest.
A bit of trivia, in the ECU it’s called “Kühlmittelheizung” - “Coolant Heating”. Obviously we all know about Webasto, but there was another system used on some Golf MK4’s (maybe others) that used 3 glow plugs in a coolant manifold. That system is what I imagine this feature was originally intended for, hence why it considers generator load and battery state.
The third system is the electric PTC heater you’ve been discussing. Doesn’t heat the coolant, but is cheap and probably faster at heating up the driver.
As for part number, I can check later. You also need the lower housing as it’s different
PlasticMac
Member
The duct, and the single element heater part numbers are in this thread:
Thread 'No Longer Required. Is Anyone Breaking An A2 with a PTC, (Electric), Heater?' https://www.a2oc.net/community/inde...aking-an-a2-with-a-ptc-electric-heater.54452/
The two element version is D0467976 I think.
Mac.
Thanks @PlasticMac
Knowing those product codes I found this:
Interesting that there is doubt one is needed on an FSI. I did notice mine heated up quickly when it was covered in frost recently but it was longer than 5mins!
...edit...it opened-up translated otherwise I would have been able to read it !!!
Knowing those product codes I found this:
Elektrischer Zuheizer - Nachrüsten beim Benziner möglich?
Hallo. Ist es abwägig eine vom A2 Diesel bekannte Zusatzheizung ( 8Z0819011A mit 1500W oder 8Z0819011B mit 900W) bei einem Benziner zu verbauen? Der Klimakasten ist laut Reperaturleitfaden identisch. Der sich unnterscheidende Gehäuseunterdeckel ( 6Q0819875C ) des Klimakastens hat bei der Zusatzhe...
a2-freun.de
Interesting that there is doubt one is needed on an FSI. I did notice mine heated up quickly when it was covered in frost recently but it was longer than 5mins!
...edit...it opened-up translated otherwise I would have been able to read it !!!