Help Plz Vagcom Code Fault

stevelufc · 20-04-2008, 12:05

i have a fault which vagcom is reading could anyone plz tell me in layman terms what the following means and how do i put it right :

1 Fault Found:
18043 - Powertrain Data Bus: Missing Message from A/C Controller
P1635 - 35-10 - - - Intermittent

EddyH · 20-04-2008, 12:11

Don't plug vagcom again and you'll never see the fault again. Problem solved.

Seriously, with that sort of code unless you are noticing something not working then I wouldn't worry about it.

**tfboy** · 20-04-2008, 12:12

Thread moved to diag area

stevelufc · 20-04-2008, 12:14

the heating control panal lights flash on and off and the air recirculation and air con buttons turn them selfs off to coincide with the flashing

EddyH · 20-04-2008, 12:17

What car is it?

stevelufc · 20-04-2008, 12:23

skoda fabia 1.9 sdi

stevelufc · 20-04-2008, 20:18

Has anyone else had this problem or heard of this before ?

devonutopia · 20-04-2008, 20:28

Just an intermittent loss of comms between the car and the aircon. Nowt to worry about. If the aircon stops working, then it's worth rescanning, and seeing if it's something more serious.

stevelufc · 20-04-2008, 21:23

thanks for the reply ! but the aircon is not working as i mentioned ~ the heating control panal lights flash on and off and the air recirculation and air con buttons turn them selfs off to coincide with the flashing ~ therefore the air recirculation and air con are not working. i have rescanned a few times and cleared the fault but it comes back straight away.
1 Fault Found:
18043 - Powertrain Data Bus: Missing Message from A/C Controller
P1635 - 35-10 - - - Intermittent

has anyone else come across this problem before.

**VRStu** · 20-04-2008, 21:37

I'd say it might be a broken or damaged wire on the A/C Controller.

stevelufc · 20-04-2008, 21:48

thanks for that info i'll start to look in that direction. would you or anyone else be able to tell me specifically where to look.

**VRStu** · 20-04-2008, 22:10

To be honest mate it's not an envious task.

What year is it?

Are you pretty handy with electrical diagnosis?

stevelufc · 20-04-2008, 22:22

its a 2001 skoda fabia 1.9 sdi i'm no expert by any means but quite handy

devonutopia · 20-04-2008, 22:29

Hmm, i would be tempted to just get a second hand replacement AC switch assembly unit complete. Should be plenty around I imagine

cars dismantled by skospares.com for all your skospares might be one place to try.

**VRStu** · 20-04-2008, 22:42

There are two wires, CAN Hi & CAN Lo (Normally Orange/Brown & Lilac/Brown) that will go to plug XS2 on the Electical Controller under the drivers knee panel.

They would be the signal ones directly from the A/C controller.

The problem is it could also be under the bonnet to the ECU.

stevelufc · 20-04-2008, 22:55

thanks devonutopia and VRStu for your reply's they are very helpful and i will look into both routes thanks again

stevelufc · 14-07-2008, 20:05

Does anyone have any detailed instructions on how i could attempt to fix this problem

fordfan · 15-07-2008, 07:28

It would be a case of getting a wiring diagram and tracing the wires looking for any dodgy connections. The key to the problem is finding out where the A/C controller is. I would start at the A/C panel in the car and would hope that it is a poor connection there. The CAN wires are twisted together, which will help with identification. It could even be an internal fault with a control unit.

stevelufc · 20-07-2008, 09:04

ok thanks fordfan

20-04-2008, 12:05	#1
stevelufc Briskodian Join Date: Mar 2008 Posts: 13 Members Car: Thanks: 0 Thanked 0 Times in 0 Posts	Help Plz Vagcom Code Fault i have a fault which vagcom is reading could anyone plz tell me in layman terms what the following means and how do i put it right : 1 Fault Found: 18043 - Powertrain Data Bus: Missing Message from A/C Controller P1635 - 35-10 - - - Intermittent

20-04-2008, 12:11	#2
EddyH Briskodian Join Date: Jun 2004 Location: West Yorkshire Posts: 4,839 Members Car: Audi A6 Thanks: 36 Thanked 26 Times in 26 Posts	Re: Help Plz Vagcom Code Fault Don't plug vagcom again and you'll never see the fault again. Problem solved. Seriously, with that sort of code unless you are noticing something not working then I wouldn't worry about it. __________________ EddyH Audi A6 Avant 2.7 TDI Audi A3 2.0 TDI Sport

20-04-2008, 12:12	#3
tfboy C+ à Paris! Join Date: Sep 2003 Location: Tilehurst, Berkshire Posts: 6,399 Members Car: "Fake" Black Magic vRS Thanks: 23 Thanked 93 Times in 82 Posts	Re: Help Plz Vagcom Code Fault Thread moved to diag area __________________ Xavier

20-04-2008, 12:14	#4
stevelufc Briskodian Join Date: Mar 2008 Posts: 13 Members Car: Thanks: 0 Thanked 0 Times in 0 Posts	Re: Help Plz Vagcom Code Fault the heating control panal lights flash on and off and the air recirculation and air con buttons turn them selfs off to coincide with the flashing

20-04-2008, 12:17	#5
EddyH Briskodian Join Date: Jun 2004 Location: West Yorkshire Posts: 4,839 Members Car: Audi A6 Thanks: 36 Thanked 26 Times in 26 Posts	Re: Help Plz Vagcom Code Fault What car is it? __________________ EddyH Audi A6 Avant 2.7 TDI Audi A3 2.0 TDI Sport

20-04-2008, 12:23	#6
stevelufc Briskodian Join Date: Mar 2008 Posts: 13 Members Car: Thanks: 0 Thanked 0 Times in 0 Posts	Re: Help Plz Vagcom Code Fault skoda fabia 1.9 sdi

20-04-2008, 20:18	#7
stevelufc Briskodian Join Date: Mar 2008 Posts: 13 Members Car: Thanks: 0 Thanked 0 Times in 0 Posts	Re: Help Plz Vagcom Code Fault Has anyone else had this problem or heard of this before ?

20-04-2008, 20:28	#8
devonutopia Mongreller Join Date: Apr 2003 Location: Exeter / Devon Posts: 30,490 Members Car: Skoda Fabia Mongrel Images: 5 Thanks: 79 Thanked 381 Times in 322 Posts	Re: Help Plz Vagcom Code Fault Just an intermittent loss of comms between the car and the aircon. Nowt to worry about. If the aircon stops working, then it's worth rescanning, and seeing if it's something more serious. __________________ Jason - Only a Skoda. Custom Fabia Bonnet Lifter Kits - £45! Click Me. BRISKODA CLUBSTAND @ Castle Combe! 25/04/09! Track session too! Click me! See the mongrel's 260bhp Dyno Video!

20-04-2008, 21:23	#9
stevelufc Briskodian Join Date: Mar 2008 Posts: 13 Members Car: Thanks: 0 Thanked 0 Times in 0 Posts	Re: Help Plz Vagcom Code Fault thanks for the reply ! but the aircon is not working as i mentioned ~ the heating control panal lights flash on and off and the air recirculation and air con buttons turn them selfs off to coincide with the flashing ~ therefore the air recirculation and air con are not working. i have rescanned a few times and cleared the fault but it comes back straight away. 1 Fault Found: 18043 - Powertrain Data Bus: Missing Message from A/C Controller P1635 - 35-10 - - - Intermittent has anyone else come across this problem before.

20-04-2008, 21:37	#10
VRStu Txt Spk Police Join Date: Dec 2004 Location: Hampshire Posts: 21,120 Members Car: Audi S3 Thanks: 195 Thanked 1,046 Times in 928 Posts	Re: Help Plz Vagcom Code Fault I'd say it might be a broken or damaged wire on the A/C Controller. __________________ Stu Stu's Websites - http://www.fabia-vrs.com & http://www.octavia-vrs.com Stu's Car - 2008 Audi S3 - Ibis White, Black Optics Pack, Privacy Glass, Auto Bi Xenon Headlights, Rain Sensing Wipers, Bose Sound System, Ipod Prep, GSM Phone Prep, Flat Bottom Multi Function Steering Wheel, Electric Folding Mirrors, Acoustic Parking, Cruise Control, Interior Light Pack, Non Smokers Pack. SWMBO's Car - 2008 Seat LEON TDi Stylance, Black Magic, Sports Pack, Rear Parking Sensors. Something for Weekend - A Patio

20-04-2008, 21:48	#11
stevelufc Briskodian Join Date: Mar 2008 Posts: 13 Members Car: Thanks: 0 Thanked 0 Times in 0 Posts	Re: Help Plz Vagcom Code Fault thanks for that info i'll start to look in that direction. would you or anyone else be able to tell me specifically where to look.

20-04-2008, 22:10	#12
VRStu Txt Spk Police Join Date: Dec 2004 Location: Hampshire Posts: 21,120 Members Car: Audi S3 Thanks: 195 Thanked 1,046 Times in 928 Posts	Re: Help Plz Vagcom Code Fault To be honest mate it's not an envious task. What year is it? Are you pretty handy with electrical diagnosis? __________________ Stu Stu's Websites - http://www.fabia-vrs.com & http://www.octavia-vrs.com Stu's Car - 2008 Audi S3 - Ibis White, Black Optics Pack, Privacy Glass, Auto Bi Xenon Headlights, Rain Sensing Wipers, Bose Sound System, Ipod Prep, GSM Phone Prep, Flat Bottom Multi Function Steering Wheel, Electric Folding Mirrors, Acoustic Parking, Cruise Control, Interior Light Pack, Non Smokers Pack. SWMBO's Car - 2008 Seat LEON TDi Stylance, Black Magic, Sports Pack, Rear Parking Sensors. Something for Weekend - A Patio

20-04-2008, 22:22	#13
stevelufc Briskodian Join Date: Mar 2008 Posts: 13 Members Car: Thanks: 0 Thanked 0 Times in 0 Posts	Re: Help Plz Vagcom Code Fault its a 2001 skoda fabia 1.9 sdi i'm no expert by any means but quite handy

20-04-2008, 22:29	#14
devonutopia Mongreller Join Date: Apr 2003 Location: Exeter / Devon Posts: 30,490 Members Car: Skoda Fabia Mongrel Images: 5 Thanks: 79 Thanked 381 Times in 322 Posts	Re: Help Plz Vagcom Code Fault Hmm, i would be tempted to just get a second hand replacement AC switch assembly unit complete. Should be plenty around I imagine cars dismantled by skospares.com for all your skospares might be one place to try. __________________ Jason - Only a Skoda. Custom Fabia Bonnet Lifter Kits - £45! Click Me. BRISKODA CLUBSTAND @ Castle Combe! 25/04/09! Track session too! Click me! See the mongrel's 260bhp Dyno Video!

20-04-2008, 22:42	#15
VRStu Txt Spk Police Join Date: Dec 2004 Location: Hampshire Posts: 21,120 Members Car: Audi S3 Thanks: 195 Thanked 1,046 Times in 928 Posts	Re: Help Plz Vagcom Code Fault There are two wires, CAN Hi & CAN Lo (Normally Orange/Brown & Lilac/Brown) that will go to plug XS2 on the Electical Controller under the drivers knee panel. They would be the signal ones directly from the A/C controller. The problem is it could also be under the bonnet to the ECU. __________________ Stu Stu's Websites - http://www.fabia-vrs.com & http://www.octavia-vrs.com Stu's Car - 2008 Audi S3 - Ibis White, Black Optics Pack, Privacy Glass, Auto Bi Xenon Headlights, Rain Sensing Wipers, Bose Sound System, Ipod Prep, GSM Phone Prep, Flat Bottom Multi Function Steering Wheel, Electric Folding Mirrors, Acoustic Parking, Cruise Control, Interior Light Pack, Non Smokers Pack. SWMBO's Car - 2008 Seat LEON TDi Stylance, Black Magic, Sports Pack, Rear Parking Sensors. Something for Weekend - A Patio

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20-04-2008, 22:55	#16
stevelufc Briskodian Join Date: Mar 2008 Posts: 13 Members Car: Thanks: 0 Thanked 0 Times in 0 Posts	Re: Help Plz Vagcom Code Fault thanks devonutopia and VRStu for your reply's they are very helpful and i will look into both routes thanks again

14-07-2008, 20:05	#17
stevelufc Briskodian Join Date: Mar 2008 Posts: 13 Members Car: Thanks: 0 Thanked 0 Times in 0 Posts	Re: Help Plz Vagcom Code Fault Does anyone have any detailed instructions on how i could attempt to fix this problem

15-07-2008, 07:28	#18
fordfan Jelly Mould Join Date: Mar 2005 Posts: 2,120 Members Car: Ford Thanks: 33 Thanked 264 Times in 231 Posts	Re: Help Plz Vagcom Code Fault It would be a case of getting a wiring diagram and tracing the wires looking for any dodgy connections. The key to the problem is finding out where the A/C controller is. I would start at the A/C panel in the car and would hope that it is a poor connection there. The CAN wires are twisted together, which will help with identification. It could even be an internal fault with a control unit.

20-07-2008, 09:04	#19
stevelufc Briskodian Join Date: Mar 2008 Posts: 13 Members Car: Thanks: 0 Thanked 0 Times in 0 Posts	Re: Help Plz Vagcom Code Fault ok thanks fordfan

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