Sorry But Another Aux Heater Question

[dave_m]

I have checked the Aux heater module and am getting the following codes

 

Tuesday, 08 November 2005, 17:22:25

 

VAG-COM Version: Release 504.1-D

Control Module Part Number: 7M3 819 008 C

 

Component and/or Version: HEIZG. B/D5W 0001

 

2 Faults Found:

 

01415 - Recirculating Pump (V55)

36-00 - Open Circuit

 

 

Had a look on TIS but can't seem to find any info relating to the Recirculating Pump any help will be greatly appreciated.

 

I have VAG COM and am in Bedfordshire area if anyone needs a hand :lol:

[Masked Marauder]

Does yours have a time switch. If not it won't have a pump.

[dave_m]

It does not have a timer, is this why it is showing an open circuit

[Masked Marauder]

Is your heater working?

 

Mine works OK, but I can't get it to talk to VAG-COM, so no idea what errors I would be getting.

[dave_m]

My heater does not appear to be working, the only fault code showing is the one above for the recirculation pump which the car doesn't have.

 

Maybe its not cold enough yet but it did not work last winter.

 

I have checked the glowplug in the heater and that is ok

 

Anyone know what to try next is there any way to force the booster heater to fire up? Its getting colder now and the car never seems to heat up on its own :(

 

step by step instructions anyone?

[Ivor_E_Tower]

is there any way to force the booster heater to fire up?

Short out the temperature sensor near the wiper mechanism, under the bonnet

[greg_68]

Try searching under aux heater,

 

here' a starter, there maybe a few more :(

 

http://www.fordgalaxy.org.uk/ford/index.ph...ic=3623&hl=hans motors&st=0

 

or this one

 

http://www.fordgalaxy.org.uk/ford/index.ph...=booster+heater

[Masked Marauder]

is there any way to force the booster heater to fire up?

Short out the temperature sensor near the wiper mechanism, under the bonnet

Yep, it is on the passenger side, clipped to the wiper mechanism stay. Best thing for shorting it out is a 10amp mini-fuse.

 

I have mine permanently connected this way at the moment, and the heater comes on when the coolant is below about 70 degrees. Once it gets above that it goes onto low output then when the engine is fully warmed up it goes off.

[dave_m]

According to TIS the Switch that operates the Booster Heater is N289 which is located by the Fog lamp on the Drivers Side. I hava a thermo switch attached to the wiper arm but cannot find this one on TIS is it definately the one on the wiper arm that controls the heater.

 

by the way I forgot to mention in my first post that VAG COM operates the metering pump and the combustion blower OK on the output tests.

[dave_m]

sorry to keep replying to my own posts but i really cannot work out whats going on with this heater.

 

If as mentioned earlier a recirculating pump is only fitted to cars with the timer and independant heating. why does VAG Com throw up an open circuit fault for this as mine does not have the timer.

 

I have the rear heating switch on the dash between the A/C and the Recirculated Air Button under the heater controls. It also has the Fan Speed Control and the Temp Control in the headlining in the rear.

 

Can anyone confirm which type system I have and whether or not there is a recirculation Pump as this seems to be the fault which is preventing the heater from running. I have trawled through the TIS but am none the wiser.

 

Help me someone before i freeze to death :ph34r:

[Jeff115]

Can anyone confirm which type system I have and whether or not there is a recirculation Pump as this seems to be the fault which is preventing the heater from running. I have trawled through the TIS but am none the wiser.

 

Help me someone before i freeze to death  :lol:

Hi Dave,

Do you have the physical recirculation pump (V55) in front of / near the booster heater unit and on the coolant circuit? It seems (from drawings) to be surrounded by a retainer box.

 

Docs. seems pretty vague about it but it seems to be installed with engines which do not have the coolant run-on pump.

 

Unfortunately if suspect the only remedy recomended if open circuit, after checking wiring and connections, is renewal. :ph34r:

 

Regards,

J.

[GSMGuy]

Righty...

 

 

The Temp sensor near the foglight is for the dash display and Ice warning, the one on the wiper arm is the one for the aux heater.. Try unplugging and spraying with a bit of WD40, the connector to the actual aux heater... It's a tricky little blighter that doesn't alwatys go all the way home..

 

Mike

[dave_m]

Right another update,

 

Had the car in bits, Bridged the temp Sensor on wiper blade to ensure heater would fire

 

Still same fault reported

 

01415 Recirculation pump

36-00 open circuit

 

Followed coolant pipes from front of car to aux heater and no recirc pump could be found anywhere.

 

removed aux heater and checked and wd-40'd connector.

 

I noticed that in addition to the 8 pin main connector there is a two pin connector coming from the aux heater which is not plugged on to the car. Purple wire and Brown Wire.

 

i shorted this out and fault code now displayed is

 

01415 Recirculation pump

35-00 Short To Ground

 

So next i got a 12v headlight bulb and connected to the two pin connector and fault code was cleared.

 

Started engine and lo and behold the heater fired and is running fine. (Headlight Bulb Shines Brightly)

 

this leads me to my next question, what is that connector supposed to be connected to??? from TIS it seems to be C312??

 

Does anyone else have the wayward connector on their heater?? and if you do can you tell me what it is connected to.

[GSMGuy]

Hmm, maybe it should have a termination plug with a resistor in it?

 

Will have a root later..

 

 

Mike

[Jeff115]

Hi Dave,

 

Followed coolant pipes from front of car to aux heater and no recirc pump could be found anywhere.

 

I was logging on to ask if you then had the cooland run-on pump (V51) as you should have either V55 or V51 but your PM answered that for me (I'll get back on the Seat Workshop Manual).

 

I'm tempted to suggest that you attach a fluorescent glow tube in place of your 12v headlight bulb so that you complete the space theme i.e. jet turbine sound plus glowing purple light from under your Galaxy but you're probably not in a good mood for jokes as you've no heat at the moment :ph34r:

 

I'd follow Mike's suggestion, if you can weather-proof the connection.

 

You don't say in previous mails if the aux heater has ever worked for you so I assume that you've inherited the problem?

 

I'd say that someone previous to you has failed to diagnose the problem. I'd say that the connector is for the recirculation pump which you do not need as you have the run-on pump - could someone else have re-fitted an aux heater not appropriate to your car with the additional connection?

 

Regards,

J.

[dave_m]

Also when the bulb is connected Heater Runs when Ignition is on regardless of whether or not the engine is running so it won'tbe pumping water through it.

 

My thoughts are that someone has changed the aux heater for one from a Gal with Auxilliary Heating, mine only has the Booster Heater which only runs when the engine is on!

 

Obviously I dont want it running when the engine is not on as it surely will just overheat and cut out.

 

Can anyone shed anymore light on this situation??

[dave_m]

Thanks everyone for the help on this, i am beginning to think that the car has the wrong heater unit fitted.

[Masked Marauder]

EPC show all heaters after Y2000 with pumps.

 

TIS shows this

 

http://www.trevor.dynip.com/gifs/auxheater.gif

 

The extra pump in inside the car by the look of it.

[Masked Marauder]

Also when the bulb is connected Heater Runs when Ignition is on regardless of whether or not the engine is running so it won'tbe pumping water through it.

 

Can anyone shed anymore light on this situation??

 

EDIT: Further investigation shows several scenarios for the heater to come on.

 

You need to drop the heater from it's bracket and see what model number it is.

[dave_m]

will find out model number tomorrow I have put it all back together now as i have to go to work

 

thanks for all your advice it is a great help

 

regards,

 

dave

[GSMGuy]

Hmm mine was built Dec 2001, reg'd Feb 2002, and it definately only had the single multiplug connection to the aux heater... I had it off enough times lol...

 

Mike

[Masked Marauder]

Hmm mine was built Dec 2001, reg'd Feb 2002, and it definately only had the single multiplug connection to the aux heater... I had it off enough times lol...

 

Mike

That is handy to know.

[dave_m]

its no good i am lost I cannot work out the wiring diagrams, basically C312 is the connector that is not connected to anything if anyone can provide any expertise

I think on TIS in the Aux Heater Wiring Diagrams ithe wiring on the car is that of

 

412-02B-00-004, Auxiliary Heating, Booster heater, Diesel, as of 11/2001

 

And the Heater Unit has the wiring for

 

412-02B-00-005, Auxiliary Heating, Independent Heating, as of 11/2001

 

 

Wonder how much a new control module(with single multiplug) for the aux heater is?

[Masked Marauder]

C312 connects to the pump, I know that much.

[dave_m]

I want to use a resistor in place of the bulb, what sort of value and power rating resistor should I use,