2002 A4 VSS from ABS

[Audiguy1234]

Some people have contacted me about finding a VSS from the ABS. So I decided to post some pictures to let you guys know how I obtained the VSS from the ABS. As some may know, the 2002 A4 do not have the VSS from the ABS. There is an impulse signal from terminal 34, which reads 3 times the actual speed. When you open up the ABS connector, you will see an empty slot for terminal 33, which means you need to insert a new terminal pin and run that to the Instrument cluster green connector pin 5, which is brown/red wire. I spliced into that wire after removing the IC, you can probably find it somewhere else but I don't know exactly. I have some pictures showing the wires you need to splice from the IC and the ABS connector with the ADDED wire to terminal 33 to obtain the VSS.

Brown/red wire is speedometer for IC

You should see the wire sticking out of the bundle or wires and that is because I added that wire to terminal 33. You will need to find a small terminal pin, I was fortunate to have extra VW connectors laying around.

[Airflite40]

WIN thanks!!!

[Airflite40]

Does your cruise control work? Did you clip the wire on pin 5 or tap into it leaving the other end still connected?

[quattro guy]

I will be attempting this today. I wont be able to try it till at least next week, that's when ill have everything put together. Thanks so much for the pics.

[Audiguy1234]

The cruise control did work. I left the pin 5 wire alone and tapped into it. No error codes of sorts.

[quattro guy]

How did you manage to take out the female clip? I went and myself some from the junk yard but i cant find a way to remove them without damaging ut

[Audiguy1234]

I used tiny paper clips and flattened them with a hammer. But they do sell the de-pin tools. Or just break the connector if you don't care. They do sell the terminal pins as well if you don't mind going that route.

[AudiA4_20T]

This is huge man way to go. This helps everyone

[mauromj]

Good stuff. I have an 02 automatic car that I did a 5 speed swap on. The new 01a tranny had the VSS port blocked and did not contain the magnetic ring that is read by the sensor. I ended up buying a ring and sensor and installing it into the transmission, but my other thought was to retrofit the ABS VSS. This is good to know for the future tho!

[AudiA4_20T]

Good stuff. I have an 02 automatic car that I did a 5 speed swap on. The new 01a tranny had the VSS port blocked and did not contain the magnetic ring that is read by the sensor. I ended up buying a ring and sensor and installing it into the transmission, but my other thought was to retrofit the ABS VSS. This is good to know for the future tho!

Right. This is also the only option for guys doing 0A3 swaps (B6/B7 S4 Trans) because it doesn't have the port for the sensor.

[quattro guy]

I bught a connector from a b5. Bought the whole abs connectors with about 2 ft or wire. U ended up breaking it because i couldnt frtwit out. Also its intallled and everything and my swap is complete all i need to do is fi d the bolts from turbo to test pipe and hook up the muffler and away i go

[quattro guy]

Finished and took the car out for a test drive and speedo works perfect. Thanks audiguy1234 for this very very useful info.

[mauromj]

Bringing this thread back to life.

I have a 2002 b6 that uses the VSS from the tranny. When I did my 5 speed swap, I simply installed the magnetic ring on the output yoke and continued to run the tranny VSS.

Now, I am doing a 6 speed swap with a b6 01E. This transmission does not have the VSS on the tranny.

So, am I good to just re-route this ABS signal to the cluster? I am assuming that the ABS sensors are already installed in the 2002 and I just have to provide its signal to the cluster?

[diagnosticator]

Bringing this thread back to life.

I have a 2002 b6 that uses the VSS from the tranny. When I did my 5 speed swap, I simply installed the magnetic ring on the output yoke and continued to run the tranny VSS.

Now, I am doing a 6 speed swap with a b6 01E. This transmission does not have the VSS on the tranny.

So, am I good to just re-route this ABS signal to the cluster? I am assuming that the ABS sensors are already installed in the 2002 and I just have to provide its signal to the cluster?

The VSS at terminal 33 ABS control module, must be connected to the IC at pin 5 Green connector. There is no wire to reroute, the required circuit needs to be added. The stock wiring '03>, is routed from the ABS control module to the connection station at the lower left kick panel, then to the IC.

Go to the dealer and buy repair wires with the correct wire terminals already crimped on the repair wires for each device being connected. Splice the long run of wire to the repair wires on each end, then simply insert the repair wire terminals into the ABS control module connector at 33, and insert the IC VSS input to the Green connector, terminal 5, both will be empty before adding the VSS circuit.

Yes, the wheel speed sensors are already present being equipped with ABS. The ABS control module takes the raw wheel speed AC voltage signal from the wheel speed sensors and converts the AC voltage from the sensors into a VSS signal that the IC can use for vehicle speed.

[swededA4]

Ok so I also have a 2002 that went from a 5 speed to a 6 speed transmission. Followed this thread and got the speedo working. Guessed and was able to get the reverse lights working. So now to the question problem. How do I get the cruise control to work in 6th gear? Also how do I get the speedometer to keep working while in 6th gear? Which was really fun to find out while going on a road trip. Works fine in first through fifth. It works for a little bit while in 6th. Then it realizes it's not supposed to and drops to 0 mph. So awesome by the way. Cruising down the highway at 80 mph and then boom your going 0. How have you guys resolved this?

[seanf86]

Ok so I also have a 2002 that went from a 5 speed to a 6 speed transmission. Followed this thread and got the speedo working. Guessed and was able to get the reverse lights working. So now to the question problem. How do I get the cruise control to work in 6th gear? Also how do I get the speedometer to keep working while in 6th gear? Which was really fun to find out while going on a road trip. Works fine in first through fifth. It works for a little bit while in 6th. Then it realizes it's not supposed to and drops to 0 mph. So awesome by the way. Cruising down the highway at 80 mph and then boom your going 0. How have you guys resolved this?

did you code your ecu for 6spd? a 5spd quattro should be something like 16701 and 6spd should be 16711

[swededA4]

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[Airflite40]

My speedo always worked in every gear. To get the cruise working in 6th you will need to make changes to the map in the ecu that has rpm ranges per gear. I was never able to code my ecu to 6 speed coding. Research in the nefmoto forums, there is enough info on those forums to do, I never had time and sold my avant in March.

[swededA4]

My speedo always worked in every gear. To get the cruise working in 6th you will need to make changes to the map in the ecu that has rpm ranges per gear. I was never able to code my ecu to 6 speed coding. Research in the nefmoto forums, there is enough info on those forums to do, I never had time and sold my avant in March.

It works in 6th gear for a little bit and then just drops out.

[mrdoofer04]

Bumping this thread from the dead. I am trying to use this guide to wire in a signal for my b6 a4 with an 01E swap and now that I have the connector pulled apart it doesn’t seem to want to accept my replacement pin. Should be correct part from the dealer but doesn’t seem to fit. I see there’s a purple tab to slide open or close, but am I missing something here?


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[Matt Devo]

Bumping this thread from the dead. I am trying to use this guide to wire in a signal for my b6 a4 with an 01E swap and now that I have the connector pulled apart it doesn’t seem to want to accept my replacement pin. Should be correct part from the dealer but doesn’t seem to fit. I see there’s a purple tab to slide open or close, but am I missing something here?

the purple lock tab usually has to be removed before pins can be inserted or removed

[mrdoofer04]

Yeah I see and option to slide it left and right but no idea how I would remove it


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[Creechy]

Would this work on a B5 facelift. It has the same VSS sensor as the early B6.

[Fast4esT]

I have an 02 5 speed, installing the b7 GVE 6 speed right now, looking up info on the speed sensor and the reverse lights.

for speedo i think i understand it
run a wire from pin 33 at abs connector to pin 5 at the cluster connector, there is currently not supposed to be a wire there so I will add my own. there is no splicing correct?



thanks

[mrdoofer04]

Pin 33 in the ABS is empty. Splicing is to the connector behind the cluster. I had a hard time pulling apart the ABs connector with all the rubber grommets that are used to keep water out. A friend made a suggestion that worked for me, which was to take a file or really thin dremel sanding bit and just carefully bore out the hole leading to pin 33. I don’t know if it is the locking mechanism that was stuck or what but the wire I used to pin was getting caught up. Did this and it was able to travel far enough to be pinned. Thanks for the write up guys. Car is now getting Speedo readings and back in action!


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[Fast4esT]

Thanks doofer
Any other 02s dropping the speed readings in 6th gear? Is that common?

[Fast4esT]

I haven’t pulled the cluster yet, is pin 5 in the green connector empty on the 02 or is there a brown/red wire already in pin 5? Getting mixed info between OP saying brown/red wire and Diagnosticator says the pin is empty.
I found that pin 3 on the 02 speed sensor plug is a brown/red wire as well. Curious if I can get VSS from pin 33 at abs and connect to pin 3 at the original speed sensor plug?

Assuming no since it has not been mentioned?

[onlyjuancannoli]

I haven’t pulled the cluster yet, is pin 5 in the green connector empty on the 02 or is there a brown/red wire already in pin 5? Getting mixed info between OP saying brown/red wire and Diagnosticator says the pin is empty.
I found that pin 3 on the 02 speed sensor plug is a brown/red wire as well. Curious if I can get VSS from pin 33 at abs and connect to pin 3 at the original speed sensor plug?

Assuming no since it has not been mentioned?

The ABS connector has an empty pin. The cluster harness connector has a wire in pin 5. The wire you install in Pin 33 of the ABS connector will run directly into the car and SPLICE into the wire that is in pin 5 on the green cluster harness plug.

[Fast4esT]

Sorry for the questions, I followed Doofer’s advice and slightly bored the hole out, pinned right in. I ran my wire from pin 33 to pin 3 on the original 5 speed sensor plug, I have working speedo. The brown/red wire that goes from the original speed sensor plug at trans harness goes to pin 10 on the black 10 pin connector behind the ecu in the cowl box, that wire continues to pin 5 at the green connector behind IC. You do not have to remove the IC to get the speedo working on the 2002;)

[mrdoofer04]

Sorry for the questions, I followed Doofer’s advice and slightly bored the hole out, pinned right in. I ran my wire from pin 33 to pin 3 on the original 5 speed sensor plug, I have working speedo. The brown/red wire that goes from the original speed sensor plug at trans harness goes to pin 10 on the black 10 pin connector behind the ecu in the cowl box, that wire continues to pin 5 at the green connector behind IC. You do not have to remove the IC to get the speedo working on the 2002;)

Hey I’m glad it worked out. Just pinning that ABS connector was the biggest hurdle. Everything else about the mod is easy. And for the earlier question about 6th gear. So far I have had no issues, but it was also my understanding that this was only a potential issue while in cruise control. My build only has about 800 sporadic miles on it overall, so I haven’t even really had a chance to use cruise control more than just a little bit. But when I did, it all functioned properly. Personally not a huge deal even if I had problems as I typically prefer to not use CC unless I’m really on some wide open highway for long stretches.


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[DPDISXR4Ti]

As a 2002 owner I was just directed to this thread. My car has a B5 V6 spec 5-speed swapped in, so I never had to even be aware of this issue since the earlier gearbox had the same VSS. I had considered going with a 01E 6-speed; this would have been one more thing to contend with had I gone that route.

Just thinking ahead, if I was to have a failure of the VSS in the transmission, could I just add the circuit from the ABS module as described herein and use that as the new VSS input?

[frogspit]

As a 2002 owner I was just directed to this thread. My car has a B5 V6 spec 5-speed swapped in, so I never had to even be aware of this issue since the earlier gearbox had the same VSS. I had considered going with a 01E 6-speed; this would have been one more thing to contend with had I gone that route.

Just thinking ahead, if I was to have a failure of the VSS in the transmission, could I just add the circuit from the ABS module as described herein and use that as the new VSS input?

yes it works perfectly


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[Dirtyb5]

oops

[EuroxS4]

There is another option to resolve this but it entails editing eeprom in the cluster and no extra wires. More or less 2002 has canbus running to the cluster. The byte in the cluster eeprom 24c08 is probably turned off to set to european byte hence why speedo wont work. You need to set it to USA manually in the flash.

* for the sake of interest, dumped 24c08 dumps for 8E0xxxxxxx - everywhere at the address 0x33A is either [21] or [31];
* it was not possible to identify a 100% dependence of 0x33A bytes on the letter-suffix at the end of the model (8E09209.X), they can be found both [21] and [31] on any letter cluster. You should backup your cluster dump when reading or writing with vag eeprom always ave decrypted and encrypted dump before making any changes. As mentioned most cluster will have (21) or (31) written at address 0x33A changing from 21 to 31 and the speedo comes alive. No need for extra wires or depinning of connector and so on. It may seem like more work but For me its a great way to save some headaches from those that don't want to bother running another wire.

I hope this information will significantly expand the range of replacement clusters for some people on here.
Tested on the following Audi_A4_B6_8E_Quattro_ 8E0920950L, 8E0920950H, 8E0920900H

b3b21es-960.jpg

[DPDISXR4Ti]

There is another option to resolve this but it entails editing eeprom in the cluster and no extra wires.

I hope this information will significantly expand the range of replacement clusters for some people on here.
Tested on the following Audi_A4_B6_8E_Quattro_ 8E0920950L, 8E0920950H, 8E0920900H

Could you clarify what you're saying here? Are you perhaps saying I could run a 2003+ cluster in my 2002 and not need to add any physical wiring to add the VSS input?

From a practical standpoint, how common is the failure of the transmission-located VSS output? (i.e. pre-2003 vehicles)

[EuroxS4]

Correct or with a transmission swap no need to run another wire from abs. Just physically changing the bit in the flash file. Bringing the speedo to life. Its not so much a failure as 2002 vehicle do not recieve vss from abs. They do not have that wire in the connector.

[Kevin C]

If its just a code change in the cluster I wonder why the factory chose to run a wire to supply VSS in 2003? Not saying it doesn't work, more like why did they add a wire vs just a recode? Good info.

[DPDISXR4Ti]

If its just a code change in the cluster I wonder why the factory chose to run a wire to supply VSS in 2003? Not saying it doesn't work, more like why did they add a wire vs just a recode?

Yes, I have the same question. Maybe "one hand didn't know what the other was doing" and they just didn't realize that data-stream was already there?

[EuroxS4]

Its a physical code change cannot be changed via vcds coding its more or less has everything to do with the steppers used and scale of units used. Early cars simply had the coding still used for KM hence why speedo did not work according to the coding in cluster. USA and Europe are 2 different animals that dont get along. The 2002 cluster still gets a wheel speed signal via canbus not via dedicate wire for some reason. I have a feeling a dedicated wire was run just in case canbus system went down for whatever reason if there was a communication issue. This is the only thing reason that makes sense to me at this time.

[catalinos]

very hepful discusions here....just one thing if u guys can help me.i did change in bin file adress to have speedometer working but still my cruise control is not working.ive change my instrument cluster from monochrome to collor ones but i cant make cruise controll working.sorry for my bad english but maybe somene can help me.my car is an audi a4 b6 from 2002 1.9 tdi awx