Specifically 5Q0907685 / 5Q0907686?
also known as the "Blindspot Radars".

 

I need to tap into the CANBUS High and CANBUS Low pins, so i can connect a TPMS (direct) controller module that i'm looking to retrofit.

 

any help would b much appreciated.

Edited 28 December, 20205 yr by JR RS

I have just read this topic on a spanish forum. They said that works on VW and also on Seat so I supposed it works on Skoda. I hope to be helpful

 

When I was looking to retrofit the BSD, I also loooked this kit:

Aliexpress

 

It seems that it bring all that you need. You only have to code.

 

With normal glass the kit has a good price. I do not know how it cost the anti-glare glass on a deleader but I find it so expensive

Hey @bak- thanks for sharing that.

However, just to b clear, I'm not looking to retrofit BSD system.  My car came with it from factory.

 

I'm going to retrofit Direct TPMS.

To do this, I need to tap into the existing BSD radar to get a connection to CANBUS High and Low.

I've read XAGICO's write-up on the TPMS retrofit, a number of times.  However he's connected it up differently with the Golf 7 wiring - he ran wires from the canbus gateway at the front, through the sides and into the rear.  I don't want to do that.

 

A Kodiaq member has tapped into the BSD for the CANBUS connections.  I'm looking to do the same. See blue arrow in pic below.

The BSD connector has 6 wires.  I'm trying to figure out which one/pin is CANBUS High and CANBUS Low.

 

I'll source power for the TPMS from the boot 12v source.

 

Edited 28 December, 20205 yr by JR RS

The two can bus wires should be obvious enough, they'll be the pair twisted together.

 

You'll probably find the colours on the tpms wiring also match them so I'd try that first.

 

If you still want the wiring diagram, you can get it from https://erwin.skoda-auto.cz/erwin/showHome.do for a small fee.

11 hours ago, JR RS said:

11 hours ago, JR RS said:

Hey @bak- thanks for sharing that.

However, just to b clear, I'm not looking to retrofit BSD system.  My car came with it from factory.

 

I'm going to retrofit Direct TPMS.

 

 

 

 

 

Oh ****! I was reading to retrofit the BSD system on a spanish forum and after that I found this post with the "radars" and I was excited XD That´s my foult.

 

I hope you find the help

16 hours ago, bak said:

 

Oh ****! I was reading to retrofit the BSD system on a spanish forum and after that I found this post with the "radars" and I was excited XD That´s my foult.

 

I hope you find the help

 

All good @bak 

 

I found some good info on the Ross-Tech forums, as well some help from messaging some Briskoda members 

 

I've been told that CANBUS wires are easily spotted using wire colors. Orange/gray for CAN-H and orange/brown for CAN-L in case of CAN Extended.
 

Below is the pin assignments of the blindspot radar connectors:-

 

Master J1086 right - connector T8bs
3 - CAN high to pin 19 on BCM plug B (white)
4 - CAN low to pin 18 on BCM plug B (white)
5 - GND
6 - to Slave 6
7 - to Slave 7
8 - +12V, terminal 15a

Slave J1087 left - connector T8br
3 - lamp mirror right K304
4 - lamp mirror left K303
5 - GND
6 - from Master 6
7 - from Master 7
8 - +12V, terminal 15a

 

I also found this handy diagram on the Russian forum:-

 

 

So I've got CANBUS pins all figured out.  I'll be tapping into the Master Radar unit.

 

Now I'm just doing research on the best way to power the TPMS module.   it requires constant power, not switched (ignition) power.  the blindspot radars do have a power source, but its unfortunately switched.  so no good for the TPMS module.

 

I have 3 options for power:-

 

1. Easiest - source from the 12v cig lighter in the boot.  this is a constant power source.

 

2. unknown - source power from the trailer electrics.   Problem is my car doesn't come with a tow bar fitted, but i hear our cars come with "tow bar preparation (electrics)" in place.  I also noticed in my car's fuse board, location 44 has a 15 amp fuse in it already. 

i just don't know if I'll find any actual tow bar electrics behind the bumper?

 

3. Hardest, but ideal - source power from the Fuse board under the dash, specifically piggyback from Fuse Location 7. 

However this requires running a wire, from under the dashboard, under the B and C trims, under the boot trim, and down to the chassis behind the rear bumper.

 

need to do some more research........

Edited 30 December, 20205 yr by JR RS

was doing some more digging around my car boot and interior, and i've come across these plugs below, found behind the left side C-pillar.

does anyone know which one is the towbar electrics?

 

i'm assuming/hoping the black connector is, and if so, then i can tap into, as per option 2 above.

@XaGiCo had suggested in his TPMS write up that SC44 was a possible alternate option to power the TPMS module.

it will also mean i don't have to run a power wire all the way to the front fuse board.

 

 

I'm not convinced your car will have trailer electrics preparation unless it was ordered specifically.

 

I don't have wiring diagrams for Superbs as recent as yours, but on the 2013- diagrams, the "trailer detection control unit" is somewhere a bit forward of those connectors on LHS of trunk. Can't quite make out exactly where we are in your photo, bit too close-in. The wiring from the front of the car to this unit doesn't seem to have any intermediate connections, and goes into a 12-way connector at the control unit.

 

May all have changed since then though.

 

Do you have a multimeter? If not, borrow or buy one (cheapest one you can find will do) and just look for 12v supplies that are always live amongst the pins of those connectors; or any others you can find near point of need.

2 hours ago, Wino said:

I'm not convinced your car will have trailer electrics preparation unless it was ordered specifically.

 

It definitely does - "1D7 - Trailer Hitch Preparation".  See screenshot of my car's specific build codes below.

 

Even though I didn't specify for factory towbar, Oz bound mk3 Superbs come with Trailer Hitch Preparation as standard.

 

Nonetheless, others have stated, as u have too, that the trailer hitch harness from the BCM is unlikely to have an intermediate connector.

 

That picture/location is the C-pillar directly behind the rear seats.  I have a hatch/liftback.

 

Yes, I have a multimeter, just in case.

 

I'm just going to go with Option 3 - I found a suitable path from the fuse dashboard, up the A-pillar, under the roof liner, front to back, and down into the C-pillar.  From there, it's an easy run behind the boot trim, and into the area behind the bumper, where the TPMS module will b located.

I'll piggyback of SC44 (Trailer device) fuse, which already has a 15A fuse in place.

 

Edited 31 December, 20205 yr by JR RS

On 30/12/2020 at 03:56, JR RS said:

 

All good @bak 

 

I found some good info on the Ross-Tech forums, as well some help from messaging some Briskoda members 

 

I've been told that CANBUS wires are easily spotted using wire colors. Orange/gray for CAN-H and orange/brown for CAN-L in case of CAN Extended.
 

Below is the pin assignments of the blindspot radar connectors:-

 

Master J1086 right - connector T8bs
3 - CAN high to pin 19 on BCM plug B (white)
4 - CAN low to pin 18 on BCM plug B (white)
5 - GND
6 - to Slave 6
7 - to Slave 7
8 - +12V, terminal 15a

Slave J1087 left - connector T8br
3 - lamp mirror right K304
4 - lamp mirror left K303
5 - GND
6 - from Master 6
7 - from Master 7
8 - +12V, terminal 15a

 

I also found this handy diagram on the Russian forum:-

 

 

So I've got CANBUS pins all figured out.  I'll be tapping into the Master Radar unit.

 

Now I'm just doing research on the best way to power the TPMS module.   it requires constant power, not switched (ignition) power.  the blindspot radars do have a power source, but its unfortunately switched.  so no good for the TPMS module.

 

I have 3 options for power:-

 

1. Easiest - source from the 12v cig lighter in the boot.  this is a constant power source.

 

2. unknown - source power from the trailer electrics.   Problem is my car doesn't come with a tow bar fitted, but i hear our cars come with "tow bar preparation (electrics)" in place.  I also noticed in my car's fuse board, location 44 has a 15 amp fuse in it already. 

i just don't know if I'll find any actual tow bar electrics behind the bumper?

 

3. Hardest, but ideal - source power from the Fuse board under the dash, specifically piggyback from Fuse Location 7. 

However this requires running a wire, from under the dashboard, under the B and C trims, under the boot trim, and down to the chassis behind the rear bumper.

 

need to do some more research........

There is a cable connection fault in this diagram. Because the master radar unit canbus cables pin 3 and 4 should not be connected to BCM pin 18 and 19 but to pin 7 and 17 CAN bus extended of the J533 Data bus diagnostic interface controller

13 minutes ago, komand1306 said:

There is a cable connection fault in this diagram. Because the master radar unit canbus cables pin 3 and 4 should not be connected to BCM pin 18 and 19 but to pin 7 and 17 CAN bus extended of the J533 Data bus diagnostic interface controller

I don’t have a wiring diagram to hand currently but I assume the B108 and B109 connections also go to BCM B plug pin 18 and 19. I can confirm this tomorrow.

 

The canbus extended network goes between a lot of components and that black dot half way up the wires in your diagram show a branch point to other parts of the car.

Edited 7 January, 20242 yr by ApertureS

The B109 and B108 is conected only to :

 

J533 -Data bus diagnostic interface

J745 -Control unit for cornering light and headlight range control

J844 -Main beam assist control unit

R242 -Front camera for driver assist systems

J769 -Lane change assist control unit

J428 -Adaptive cruise control unit

And only these controllers are connected to this CAN bus line.

 

The BCM is connected via pins 17 and 16 of the T73a conector to the B507 and B506 CAN bus line in CAN bus unit. 

This is the case with Octavia 3 FL

Does anyone know how to convert from the 5Q0 radar to the 2Q0? You have to swap the PINs and pull a cable, I know that. But does anyone have the exact occupancy?

Superb 3V Combi