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Auto Headlights and Rain sensor retrofit

IcorradoI

New member
Hello,

Also trying to do this to my '17 GTI Sport. I recently changed the windshield and added the light/rain sensor, have an auto HL switch, and bought the wiring harness from Kufatec. My question is where does the Kufatec wiring plug into the BCM? I thought I had a link showing it, but can't find it now.
 

StorableComa

Autocross Champion
Location
Long Beach, USA
Car(s)
17 GSW S
Hello,

Also trying to do this to my '17 GTI Sport. I recently changed the windshield and added the light/rain sensor, have an auto HL switch, and bought the wiring harness from Kufatec. My question is where does the Kufatec wiring plug into the BCM? I thought I had a link showing it, but can't find it now.
Normally if you check your documents when logged in, they'll have posted install docs for their harnesses after you purchase them. Do you not see one? I ordered the fog light retrofit harness, and it came with a single separate blue wire to connect the LDS to the BCM for the fog pin on the switch. I would assume their harness for light/rain would have the same, but do not know for sure.
 

DV52

Drag Race Newbie
Location
Australia
Hello,

Also trying to do this to my '17 GTI Sport. I recently changed the windshield and added the light/rain sensor, have an auto HL switch, and bought the wiring harness from Kufatec. My question is where does the Kufatec wiring plug into the BCM? I thought I had a link showing it, but can't find it now.
Here's my guess at the internal wiring of the rotary light switch on a MQB platform vehicle (the wiring external to the light switch is from VW - and yes, "J519" = BCM):
 

IcorradoI

New member
Here's my guess at the internal wiring of the rotary light switch on a MQB platform vehicle (the wiring external to the light switch is from VW - and yes, "J519" = BCM):

Thanks! I'm also tryin to add the wiring harness so that I can power my auto dimming mirror. I have the wiring harness 39980 from BKS. Do you happen to know which pins the two connectors go into the BCM? I figure the round connector is a ground(earth)?
 

DV52

Drag Race Newbie
Location
Australia
here
Thanks! I'm also tryin to add the wiring harness so that I can power my auto dimming mirror. I have the wiring harness 39980 from BKS. Do you happen to know which pins the two connectors go into the BCM? I figure the round connector is a ground(earth)?
here you go - for a RoW Golf mk7:


Don
 

IcorradoI

New member
OK. so I'm dense. My auto dimming mirror is the VW one which connects in line to the headlight switch. So nothing to wire up there, it's all plug and play.

And, I bought my wiring harness from BKS Tuning, not Kufatec, and I cannot find any installation instructions on the BKS website.

Does anyone know what I need to connect to where on this wiring harness from the rain/light sensor? It has one round terminal, which I'm guessing is for ground. Then, one wire has a smaller factory type terminal and the other a larger factory type terminal. I'm guessing one goes to a pin on the BCM and the other to the fuse box? Any help would be greatly appreciated!

Also have an extra cable to go from Pin 2 on the HLS to terminal 16 on the BCM for CH/LH.
 

IcorradoI

New member
So I've installed the rain/light sensor and ran the wiring down to the fusebox/BCM area. Installed the wiring into connector C28 of the BCM and did the ground/power connection as well. Also had to run the wire from PIN2 of the HLS to C16 on the BCM. Auto headlights now turn on/off and work well. However, I am getting an error message for a lighting system fault on the dash. I scanned it and it is code B126A29 Implausible signal from the HLS.

So, I figure I need to let the BCM know now that there is a light/rain sensor installed. I have a VAG-COM, but have never used it to code before. Is there a step by step guide anywhere to do this? I think I would also need to activate auto wipers and CH/LH while I'm at it.
 

DV52

Drag Race Newbie
Location
Australia
To register the RLS with the BCM (note this sensor is in fact a LIN slave module to the BCM) - do this:

Fire up VCDS software and connect to cable/dongle - click on Select


Click on 09-Cent. Elect.


Click on Security Access - 16


Enter the magic number 31347 - and press Do It!

Click on Adaptation - 10 (in the screen above)

Enter "ENG141985" into search box

Select IDE08786-ENG141985-Assistance light functions-Regen_Lichtsensor - change setting to LIN_REGEN_LICHT_SENSOR and press Do It!

Don

PS: I'm less sure that the steps above will address the "B126A29" error - I suspect that you might need to also change the adaptation channel ENG141656-ENG141992-Außenlicht_uebergreifend-LDS_mit_AFL to Yes - in the BCM. This tells the BCM that you ran a wire from PIN2 on the "HLS" (which is actually called the "LDS") to C16.
 
Last edited:

carbon_gecko

Passed Driver's Ed
Location
texas
Car(s)
2016 GOLf tsi 'S'
so i am having a similiar issue. I am Retrofitting the RLS in a mk7 golf with a highline bcm and all my lights work except i am getting the vehicle lighting fault on my dash and the indicator lights on the dash flash twice as fast as the lights outside when signaling. i have changed IDE08786-ENG141985-Assistance light functions-Regen_Lichtsensor - change setting to LIN_REGEN_LICHT_SENSOR , but when i try to find ENG141656-ENG141992-Außenlicht_uebergreifend-LDS_mit_AFL it doesnt show up under 09 central electronics. I have the wiring following the euro light switch wiring guide, all wires from the switch are properly routed. my only possible issue is using the mini fuse tap to fuse 8. when i look at the errors this is what shows up:
Address 09: Cent. Elect. Labels: 5Q0-937-08X-MV1.clb
Control Module Part Number: 5Q0 937 087 AA HW: 5Q0 937 087 AA
Component and/or Version: BCM PQ37BOSCH 028 0162
Software Coding: 0000184240C196DC69E4400000040F001008000000000000000000000000
Work Shop Code: WSC 12345 123 61029
ASAM Dataset: EV_BodyContrModul1UDSBosc 015002 (VW37)
ROD: EV_BCMBOSCH_015.rod
VCID: 7AADF59C2C5353AB3D6-802E
4 Faults Found:

568836 - Databus
U1121 00 [009] - Missing Message
[LWR AFS - Kein Signal/Kommunikation]
Confirmed - Tested Since Memory Clear
Freeze Frame:
Fault Status: 00000001
Fault Priority: 6
Fault Frequency: 1
Reset counter: 208
Mileage: 90069 km
Date: 2021.01.16
Time: 14:42:19

568086 - Databus
U1123 00 [009] - Received Error Message
[LCM links - Blinker defekt]
Confirmed - Tested Since Memory Clear
Freeze Frame:
Fault Status: 00000001
Fault Priority: 6
Fault Frequency: 1
Reset counter: 209
Mileage: 90070 km
Date: 2021.01.16
Time: 16:45:24

568342 - Databus
U1123 00 [009] - Received Error Message
[LCM rechts - Blinker defekt]
Confirmed - Tested Since Memory Clear
Freeze Frame:
Fault Status: 00000001
Fault Priority: 6
Fault Frequency: 1
Reset counter: 209
Mileage: 90070 km
Date: 2021.01.16
Time: 16:44:33

929796 - Light Switch
U110B 00 [009] - No Communcations
[Lichtschalterkeine Kommunikation]
Confirmed - Tested Since Memory Clear
Freeze Frame:
Fault Status: 00000001
Fault Priority: 2
Fault Frequency: 1
Reset counter: 208
Mileage: 90069 km
Date: 2021.01.16
Time: 14:42:21
 

Attachments

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DV52

Drag Race Newbie
Location
Australia
@carbon_geko: The reason for your difficulty is because your mk7 has the older style BCM with has a non-zero long-code string. On these older BCM, the facility that tells the BCM that a rotary light switch with an AUTO position is on Byte 17, Bit 5.
Your BCM has the following long-code string:

Code_String to Byte_list convert
ByteHexadecimal ValueBinary Value
00000000000
10000000000
21800011000
34201000010
44001000000
5C111000001
69610010110
7DC11011100
86901101001
9E411100100
104001000000
110000000000
120000000000
130400000100
140F00001111
150000000000
161000010000
170800001000
180000000000
190000000000
200000000000
210000000000
220000000000
230000000000
240000000000
250000000000
260000000000
270000000000
280000000000
290000000000

So, as you can see - Byte 17 has the value hex08. Set this Byte according to the screenshot blow:



Don
 

carbon_gecko

Passed Driver's Ed
Location
texas
Car(s)
2016 GOLf tsi 'S'
@carbon_geko: The reason for your difficulty is because your mk7 has the older style BCM with has a non-zero long-code string. On these older BCM, the facility that tells the BCM that a rotary light switch with an AUTO position is on Byte 17, Bit 5.
Your BCM has the following long-code string:

Code_String to Byte_list convert
ByteHexadecimal ValueBinary Value
00000000000
10000000000
21800011000
34201000010
44001000000
5C111000001
69610010110
7DC11011100
86901101001
9E411100100
104001000000
110000000000
120000000000
130400000100
140F00001111
150000000000
161000010000
170800001000
180000000000
190000000000
200000000000
210000000000
220000000000
230000000000
240000000000
250000000000
260000000000
270000000000
280000000000
290000000000

So, as you can see - Byte 17 has the value hex08. Set this Byte according to the screenshot blow:



Don
Thank you for the reply, just to confirm does that mean I have no LIN and so I should not have byte 6 light sensor selected? Also are there any adaptions that need to be modified? I have the vehicle light fault still on my dash after modifying byte 7.
 

DV52

Drag Race Newbie
Location
Australia
@carbon_gecko : Byte 6, Bits0-1 on the BCM should be set to LIN_REGEN_LICHT_SENSOR , which has the value xxxx xx10.

I'm surprised to read in your post that your BCM has the adaptation channel IDE08786-ENG141985-Assistance light functions-Regen_Lichtsensor. Normally when these older BCMs have a non-zero long-code string, this channel is absent (because it duplicates the software switches in Byte 6). So it's really strange that your BCM has both facilities!!!

Just to confirm, your BCM is coded for incandescent headlight lamps - is this correct? Also, how did you code the new RLS/RLHS/RLFS module (meaning what is the long-code string value for the LIN slave module)?

Don
 
Last edited:

carbon_gecko

Passed Driver's Ed
Location
texas
Car(s)
2016 GOLf tsi 'S'
@carbon_gecko : Byte 6, Bits0-1 on the BCM should be set to LIN_REGEN_LICHT_SENSOR , which has the value xxxx xx10.

I'm surprised to read in your post that your BCM has the adaptation channel IDE08786-ENG141985-Assistance light functions-Regen_Lichtsensor. Normally when these older BCMs have a non-zero long-code string, this channel is absent (because it duplicates the software switches in Byte 6). So it's really strange that your BCM has both facilities!!!

Just to confirm, your BCM is coded for incandescent headlight lamps - is this correct? Also, how did you code the new RLS/RLHS/RLFS module (meaning what is the long-code string value for the LIN slave module)?

Don
Okay so I have Byte 6 set , the bcm is upgraded to a highline which might be why it has some adaptions lines. the rlhss is coded 0038DD. The auto lights seem to work even though the fault won't clear. The rain sensor is sporadic when set to interval (one wipe a minute, seven wipes the next, none for 4 minutes even though it is moderate to heavy rain) the dash indicators blink twice as fast as the actual turn signals and show errors. I bought a new sensor 5Q0-955-547-B hopefully this will correct most issues. Also I need to recheck fuses.
 

DV52

Drag Race Newbie
Location
Australia
Okay so I have Byte 6 set , the bcm is upgraded to a highline which might be why it has some adaptions lines. the rlhss is coded 0038DD. The auto lights seem to work even though the fault won't clear. The rain sensor is sporadic when set to interval (one wipe a minute, seven wipes the next, none for 4 minutes even though it is moderate to heavy rain) the dash indicators blink twice as fast as the actual turn signals and show errors. I bought a new sensor 5Q0-955-547-B hopefully this will correct most issues. Also I need to recheck fuses.

OK: when you install 5Q0-955-547 module, perhaps these VCDS screens will be useful?
Don

 

carbon_gecko

Passed Driver's Ed
Location
texas
Car(s)
2016 GOLf tsi 'S'
OK: when you install 5Q0-955-547 module, perhaps these VCDS screens will be useful?
Don

Yes hopefully, actually I have come to realize that while I have the errors currently the sensor is working. The quality of the sensor is poor so while I have the wiper blade set to interval I have to press the sensor to the glass for it to register and wipe. The auto lights are set way to dark like 8pm at night to register. As for humidity, I have been un able to get it to activate by itself even after fogging up the front windscreen.
 
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