Webasto and VCDS

simufly

simufly

A2OC Donor
United-Kingdom
Problem with the scan of the Webasto.
I am using the protocol as recommended by @PlasticMac
The scan comes up with this which is not very helpful
IMG_1374.jpeg

so what do I do now?
Thanks for any inputs.
Simon
 
simufly said:
Here you go!View attachment 117368
Click to expand...
You need the login code to continue. I don't know the login code for Aux Heat Controller. Tom ( @2work ) will know it. I'm sure.
I can't help, as mine is not so blessed. Just imagine an FSI with Webasto. No, perhaps not.

I'd start with a scan of the engine, Measuring Blocks, Group 016, to see the status of the Shutdown conditions for the Aux Heater, (Webasto, or Electric).
With engine running, a cool engine, and ambient above 5.0C, you should see 10000001. If this isn't right, the Aux Heater won't run.
Block 03 relates to the Electric Heater.

016,0,Auxiliary Heating (Group 016).
016,1,Generator Load,,Range: 0.0...100.0 %
016,2,Auxiliary Heating,Shut-Off Conditions,xxxxxxx1 = Coolant Temparature above 80.0 °C\nxxxxxx1x = Generator Malfunction\nxxxxx1xx = Battery Voltage too Low\nxxxx1xxx = Engine Speed too Low\nxxx1xxxx = Start Delay active\nxx1xxxxx = System Malfunction (G62 OR G72 FAULTY)\n1xxxxxxx = Ambient Temperature above 5.0 °C
; 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)
; x1xxxxxx = Econ Switch Off, (Econ Not Selected).
; 1xxxxxxx = Ambient Temperature above 5.0 °C
016,3,Heating Element,Activation,1x = Relay for High Heat Output (J360) ON\nx1 = Relay for Low Heat output (J359) ON
; 1x = Relay for High Heat Output (J360) ON
; x1 = Relay for Low Heat output (J359) ON
016,4,Supply Voltage,(Terminal 30),Range: 0.0...20.0 V\n Specification: 13.0...15.0 V
Mac.
 
Hi Simon,

I’ve just come in from the car as my laptop is dead after being out there tinkering.

From memory:

1. Log into Aux Heater 18
2. Select and go through the output tests to ensure all is fine.
3. Check for any faults after the output tests are complete
4. To conduct a test run select basic setting and read channel 022

This will start the webasto

Remember to read channel 033 to stop the testing

About to head out but will come back to you later on if you have any issues with the above quick tips.

Kind regards,

Tom
 
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Ahhhh darn it.

Got home today 10 deg c, and the webasto fan was buzzing whirring away, sporadically and a smell of diesel!! Odd as it shouldn't be on at all.

No signs of leaks so plugged it in and got this...
20240124_181951.jpg


Then looked measuring and saw these
..
20240124_182219.jpg
20240124_182218.jpg
20240124_182048.jpg


Under voltage malfunction. ⚡️

So why would unit be getting under 12 volts?
Why would it be switched on too?

My gut feeling is circuit board is malfunctioning else why would it even try and fire up at 10.5 deg c and a hot engine?
I've pressed econ to try and shut it off for now and see what happens. I guess that diesel has nowhere to go but soak the gauze inside and build up, not good as it'll congealed and burn when it does work.

Your thoughts good people?

No issue with my battery I charged it at weekend and its starting in a millisecond..
 
Last edited:
CrispyEdd said:
Ahhhh darn it.

Got home today 10 deg c, and the webasto fan was buzzing whirring away, sporadically and a smell of diesel!! Odd as it shouldn't be on at all.

No signs of leaks so plugged it in and got this...
View attachment 118154

Then looked measuring and saw these
..
View attachment 118155View attachment 118156View attachment 118157

Under voltage malfunction. ⚡️

So why would unit be getting under 12 volts?
Why would it be switched on too?

My gut feeling is circuit board is malfunctioning else why would it even try and fire up at 10.5 deg c and a hot engine?
I've pressed econ to try and shut it off for now and see what happens. I guess that diesel has nowhere to go but soak the gauze inside and build up, not good as it'll congealed and burn when it does work.

Your thoughts good people?

No issue with my battery I charged it at weekend and its starting in a millisecond..
Click to expand...
Couple of thoughts here.


1) under voltage -> bad earth so the voltage being input can't be shunted through the unit to the earth and back to battery. Hence under 12V read.
2) you've mentioned charging the battery up at the weekend. Could some of the issues be legacy voltage-related ie before it was charged? Secondly, could there be something daft but high-consuming like a dirty starter earth point that is causing very abrupt voltage drops globally within the vehicle systems during cranking and thereby upsetting ECUs even with a good battery?
 
Robin_Cox said:
Couple of thoughts here.


1) under voltage -> bad earth so the voltage being input can't be shunted through the unit to the earth and back to battery. Hence under 12V read.
2) you've mentioned charging the battery up at the weekend. Could some of the issues be legacy voltage-related ie before it was charged? Secondly, could there be something daft but high-consuming like a dirty starter earth point that is causing very abrupt voltage drops globally within the vehicle systems during cranking and thereby upsetting ECUs even with a good battery?
Click to expand...
A good point. I charged the battery just for hell of it really while had the kit out, it wasnt low. All earth were cleaned and refit on last 12 months so hopefully not those. Certainly no issues with starting it's one of the fastest 1sr crank cars I've had now.
Is there an earth to the unit I can check somewhere?

So odd that it fired up when not meeting criteria though.
I wiped the codes and the unit was going (thinl it has a 120 seconds shut down procedure as a safety thing) and undervolts came back fluctuating around 5v
 
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