T5.1 Rain sensitive wipers not working

[jengledow]

HI, I've just bought a 2015 T5.1 and after lurking on here for a while this is my first post! The rain sensitive wipers aren't working (I can do single wipes or wipers on full, but no intermittent or rain sensitive wiping). I've done the usual google searches and tried a BCM Hard reset/Capacitive discharge and checked the fuses, but still not working. what else should I look at? Thanks.

 

[mmi]

Just to clarify - the following gives no wipes at all?

Set the wiper stalk to OFF, sensitivity switch to the left (least sensitive position) -- IGN ON​

1) move wiper stalk one step up (intermittent/rain sense position) -- do you get one wipe?​

2) move sensitivity switch one step to right -- do you get one wipe?​

2.a) move sensitivity switch one more step to right -- do you get one wipe?​

 

[jengledow]

Yes, that is exactly what I get (much better explanation than I can manage)!.

I've tried it at various speed (including motorway) and with everything from light drizzle to torrential rain and get nothing more than the single wipe when I move the wiper stalk or sensitivity switch.

 

[mmi]

Ok - obviously the functionality is initialized correctly. I believe we are left with the rain sensor circuitry. The fuse is SC21 (T5.1).

What about the autolights - do they work? OFF in bright daylight, ON if you blank the sensor?
(The sensors are in the same module).

Can you see if rain sensor transmits infrared (use cellphone's camera)?
Have a look here --> https://www.t6forum.com/threads/rain-closing.58/post-261054
(The above is T6 but it might be similar working principle in T5.1 - although the part numbers for the sensor are not the same).

 

[jengledow]

The auto headlights are working and I tried looking for the infrared using my phone camera but cannot see anything (not sure if that's because its not there or just because I'm incompetent - I'll try again later when the sun isn't so bright!).

 

[Pauly]

I think a fault scan could be helpful to determine if there are any faults logged ?

 

[jengledow]

Cheers both, I'm hoping I know someone with a suitable VCDS, but if not any recommendations as to what's good value?

 

[mmi]

Cheers both, I'm hoping I know someone with a suitable VCDS, but if not any recommendations as to what's good value?

An earlier thread on the subject...

VCDS where to buy?

Good evening all, Where in the UK is the best place to purchase Ross-Tech VCDS? Does anywhere offer discounts for forum members? If I were to purchase the 3 VIN version can you upgrade to 10 VIN at a later date? I have my VW T6 and my partners Seat Ibiza that it would be very useful for...

www.t6forum.com

Then just some weird stuff to demonstrate how deep you can go with VCDS -->

Noise at 1350rpm

While I can't completely rule out the fact that it could be a big issue, one major thing for me is that it doesn't appear to be from the major rotating assemblies. That is, when I turn the engine off I can hear the "noise" slowly running down and this continues almost unchanged beyond the point...

www.t6forum.com

Anyone Know What This Fault Is And Whats Broken?

Thanks for any info.

www.t6forum.com

Battery charging through regenerative braking.

Engine start at 30 s. Start of downhill at 100 s - foot off the throttle. Slight touch on the throttle at 108 s. Again foot off the throttle at 180 s, at 200 s, and very briefly at 220 s. In this case regenerative braking gained approx. 5 Amps more charging during 100-160 seconds. Unfortunately...

www.t6forum.com

 

[jengledow]

I’ve borrowed a Carista and there are no obvious wiper related fault codes and the auto wipers were set ‘on’! I’ve tried turning them off and on again and it’s not made any difference. I’ve currently just turned it off so at least have the intermittent wipers now! Is there anything else (relatively simple) worth looking at or should I just live with intermittent wipers?

 

[mmi]

Although unlikely culprit, but we could double-check that the rain sensor is activated correctly in Central electrics controller (BCM).
It can be then decrypted from "Detailed ECU info"-report (under Service menu) - just post it here.
For the above you need to activate the auto wipers first and then do the "Detailed ECU info".

 

[jengledow]

DETAILED ECU INFO

ECU info obtained with Carista 610099 for iOS:



VIN: WV1ZZZ7HZFH069387



Engine

Part #: 03L906019FK

Component: R4 2,0L EDC

Software version: 6306

ASAM/ODX identifier: EV_ECM20TDI01103L906019FK

Coding: 01254012232400080000 (hex)

[No fault codes]



Transmission

Part #: 0BT300045R

Component: DSG DQ500-7F

Software version: 2241

ASAM/ODX identifier: EV_TCMDQ500021

Coding: 0014 (hex)

[No fault codes]



ABS

Part #: 7E0907379L

Component: ESP MK25A XT

Software version: 0113

ASAM/ODX identifier: [none]

Coding: 108724AD09AA089E24A59079BA6512 (hex)

[No fault codes]



Instrument cluster

Part #: 7E0920970N

Component: KOMBI

Software version: 0805

ASAM/ODX identifier: EV_Kombi_UDS_VDD_RM09

Coding: 460A01 (hex)

[No fault codes]



Airbags

Part #: 7E0959655B

Component: VW10Airbag009

Software version: 0013

ASAM/ODX identifier: EV_AirbaVW10BPAVN750

Coding: 000000000000000000000000000000003039 (hex)

[No fault codes]



Steering angle

Part #: 6R0959654

Component: LENKW.SENSOR

Software version: 0070

ASAM/ODX identifier: EV_LWSKLOVW25X

Coding: 01 (hex)

[No fault codes]



Parking/steering assist

Part #: 7E0919475K

Component: PARKHILFE 4K

Software version: 0106

ASAM/ODX identifier: EV_VW75XParkAssis4K

Coding: 108101 (hex)

[No fault codes]



Heater & air conditioning

Part #: 7E5907047BM

Component: Climatic-T5

Software version: 0506

ASAM/ODX identifier: EV_ClimaticT5

Coding: 0000000002 (hex)

[No fault codes]



Radio

Part #: 5M0035186J

Component: RCD310 EU T

Software version: 5007

ASAM/ODX identifier: [none]

Coding: 05000200020014 (hex)

[No fault codes]



Telephone

Part #: 7P6035730M

Component: TELEFON

Software version: 4217

ASAM/ODX identifier: EV_UHVNA

Coding: 0A01010000010110 (hex)

[No fault codes]



Central electronics

Part #: 7H0937090D

Component: BCM PQ25 Max4

Software version: 0725

ASAM/ODX identifier: [none]

Coding: B8FC79BA0A61341393284E706CEB1EDC0780612F60842C40320000020800 (hex)

[No fault codes]



CAN network gateway

Part #: 6N0909901

Component: GW-K-CAN TP20

Software version: 0725

ASAM/ODX identifier: [none]

Coding: 042300 (hex)

[No fault codes]



Immobilizer

Part #: 5K0953234

Component: IMMO

Software version: 0805

ASAM/ODX identifier: EV_Immo_UDS_VDD_RM09

Coding: 000000 (hex)

[No fault codes]



Obtained with Carista 610099 for iOS.

Download app: ‎Carista OBD2

Facebook: Log in to Facebookl

 

[mmi]

DETAILED ECU INFO

Thanks - yes the rain/light sensor is coded correctly and activated in the BCM.
The fact that autolights work, a kind of proves that power and wiring to the sensor are good. Also the wiper stalk+switches work correctly. Thus current assumption is that the rain sensor part is faulty.

Anyways, the "manual" intermittent wipers is a good workaround.

 

[WeeLee]

Glad to have found this thread. I have a similar issue. No Intermittent wipers at all.
Will ask my mate to plug his PC in to it and see what comes up.