Bigmac1974

New Member
Hello this is my first thread

asking for some help along the way please guys gals

I’m doing something that I’m not sure if someone’s already done or not
i have a 2008 T5 2.5
swapping the interior dash out, crash bar, steering column, heater blower/heater matrix/ aircon unit, door cards and all revel at plastics to a complete T6

so progress so far
dash out
crash bar out steering column out
heater unit out
heater unit back in coolant refilled aircon regassed
crashbar in steering column in
dash switches amended
fuse boxes relays relocated
everything plugged in and tested NO ERRORS


Heater controller manual Bowden cables to electronic climate
Surely its just swapping something thats manual to electronic ????

basically
old unit had :
A large plug that was connected into the rear of the heater controller below
128978-6f5ac6296e9c9db7d169be111d53d4df.jpg
5 big cables
34688F00-8FA5-4E65-B432-1948C8334409.jpeg
1) white with black stripe *
2) white with red stripe *
3) blue *
4) yellow *
5) black with blue stripe terminated here

the 4 cables with * went to the heater matrix via links
1) white with black stripe *
2) white with red stripe *
3) blue *
4) yellow *

the only cable to continue was the 4) yellow* which was joined to a twin plug with a brown ground passenger side footwell and
went into the heater blower

there’s was then one black plug that was connected with a series of smaller cables
6A83E664-C76C-46A2-8147-A2E895243DBC.jpeg
1) brown with red bands ( ground also passenger footwell )
2) orange & green ( can bus high )
3) orange and brown ( can bus low )
4) green
5) white
6) red and white
7) a) white with red
b) blue with green ( both connected to blue plug )
8) a) brown
b) brown and white ( both connected to a grey plastic sensor in the vent )

New heater controller below
128979-ce82f5262d30a6b07e282071c936d73e.jpg
then new unit heater blower/heater matrix and air con all as one unit with its own wiring attached
only needed one connecting plug from using existing cables from above
1) big cables a) black and blue
b) brown ( ground passenger footwell )

2) smaller cables a) white
b) green
c) orange and green ( can bus high )
d) orange and brown ( can bus low )
e) brown and white
f) red and white
g) a) purple
b) purple and white ( both connected to air con sensor in dash vent drivers side )

i traced back all other wires that were remaining from existing plugs and the only ones that went into the main harness were the ones I’d re used all others were purely links

1) everything is wired soldered in no errors
2) air con regassed and pressurised NO LEAKS
3) Coolants all topped up and bleed NO AIRLOCKS
4) ignition on engine starts no issues
5) Lights on everything lights up inc new heater controller
128982-09ec343a2bcd4d602489f947303b8063.jpg
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6) temp dial moves but no change in temp from vents even though engine is up to temp
7) blower dial works
8) direction dial moves but no change in stepper flaps
9) rear screen button no light when pressed
10) aircon button no light when pressed
11) recirc button no light when pressed

pretty sure all it needs is recoding ?????????

anyone with any comments
@Pauly @Deaky @Bathaudio @Loz @Motortech

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Reactions: mmi
Interesting thread !

I think we need to look at old wiring diagrams vs new so we can compare differences etc

Have you done any coding ?
What does a fault scan show ?
Have you got the new module showing in the gateway list and can you communicate with it ?
 
No coding as of yet can’t get anyone to do it
only been plugged in with a basic vehicle diagnostic tool showing no errors

I’m hoping to have someone plug it in this coming week was let down by someone today
 
Could we see a photo of the rear of both units please, im interested in the type and size of each connector so i can see how many pins are there etc
 
Afternoon @Pauly

the old unit had 2 plugs going into the rear of the panel
1) with 5 big cables
2) with the smaller cables
B9672F6B-D81D-4DC8-8503-30F2E6A3782D.jpegA1E1665F-57B9-428B-8637-025C76D69536.jpegB4240F84-AC99-404B-948E-6DF7E4D74490.jpeg

Then the new unit has 3 plugs which is its own separate loom that clips into the heater blower/ heater matrix/aircon/ sensors all together
9CCA2FF7-AE16-407E-BBDE-0597D281EA11.jpeg

Hope this helps

many thanks for your hard work very much appreciated
lea
 
Hi Lea :)

I have a feeling you will need a new air box...

The motors are all integrated as part of that assembly if I remember correctly, along with the control unit connectors.

Let me know if you find out otherwise!!

Sam :)
 
Sorry its late Sam
I’ve got a brand new unit blower/aircon/heater with the loom attached which then connects to the existing loom

i could really do with someones help to get this going
I’m in Thornbury ill cover your costs
just drop me a message on WhatsApp
 
Sorry its late Sam
I’ve got a brand new unit blower/aircon/heater with the loom attached which then connects to the existing loom

i could really do with someones help to get this going
I’m in Thornbury ill cover your costs
just drop me a message on WhatsApp
Did you ever get this completed?
 
Sorry its late Sam
I’ve got a brand new unit blower/aircon/heater with the loom attached which then connects to the existing loom

i could really do with someones help to get this going
I’m in Thornbury ill cover your costs
just drop me a message on WhatsApp
Hi Did you get this sorted?, what if you remember were the part numbers of the new unit/blower/aircon/heater, and if the attached loom had part number.
 
Ull never get heater pannel to work it’s powered by canbus , from t6 ie u have ur live earth igition rest is can bud controlled , right mate.
 
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