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Topic Review (Newest First)
09-06-2017 11:01 AM
mike d Hey, just adding an update for those of you seaking to have working AC (air conditioning) again!

here is the recipe, When converting a TCS harness to non TCS (i don't swap full harnesses anymore)

Go to T5 ECU plug, locate pin 59, and open slot (no current contact) in spot #54

-Add wire, and contact to spot 54 of ECU plug
-locate pin 59, and cut wire going to pin 59, 3-6 inchs away from ecu
- Attach harness side of what was pin 59, to the newly added pin 54
- From pin 59, run wire across the bulkhead to AC anti-frost switch. Attach splice into green/white wire of anti-frost switch. Thus detaching car end of green white wire from switch

Enjoy properly working AC!

Also, as another note i do not swap the engine bay harness when i do swaps anymore, the only difference is the wiring for the AIC valve, and TPS, And its much easier for me to just add these wires, and pins to the ECU plug, (its 5 wires total) than it is for me to remove a harness from said junk car, remove harness from from current car, install new harness, ect ect ect..
07-11-2017 05:58 PM
doug knoll
Quote:
Originally Posted by Svenska94Aero View Post
dumb question, but how can i be sure if i have TCS or not? 1994 9k Aero

clean it
02-17-2012 05:20 AM
dantinne
Quote:
Originally Posted by tuner4life View Post
Do you just cut/resplice the wires close to the abs computer? Or somewhere else?

Also Does this work on a 1992?
IMO, the easiest way to temporarily disable the Traction Control "feature" is installing the kit:
TCS On/Off Switch Kit for Saab vehicles

If you don't care about having a fancy TCS switch in the dash, then check out the wiring diagram on the installation instructions that come with the kit... and DIY.
Here's a link.
02-17-2012 03:53 AM
tuner4life
Quote:
Originally Posted by as10en View Post
If you want to put TCS "to sleep" I can tell you how to do it. It will make sure the system never comes on but as the guy mentioned before it wont help you with LHM or codes. Leave the four wheel speed input wires in thier stock configuration going into ABS ECU so you get correct ABS function but change them into ASR (if an automatic), or TCS (on a manual). Swap the LF with the RR, the RF with The LR. I tried it first front to back (LF to LR, etc.)to front and it did not work. I then tried "crossing" them and it worked. The ECM thinks it is looking at the rear wheels as a constant and it's looking for wheel slip in the front. So swaping front to back makes sense. The ECM is tricked into thinking the front wheels are the constant. But why did I have to swap side to side too? I did this 9 years ago and last week I found out why! My girlfriend is great, she rotates my saab manuals in and out of the magazine rack. I was sitting on my throne reading 1993 ABS manual and there it was in the description of operation right in the begining! The brake circuts are split LF and RR, and RF and LR instead of the front being one circut and the back another. Well I'll be!
PS you cant run 94 9000 T5 on a 93 9000 because the crank pickups are different (not compatible) the pickup wheel is on the crank pulley on the 93 but on the crank on the 94
Do you just cut/resplice the wires close to the abs computer? Or somewhere else?

Also Does this work on a 1992?
02-16-2012 11:00 PM
john85020
Quote:
Originally Posted by dantinne View Post
I could have used your wisdom two years ago... back then, I couldn't find anybody who has removed TCS from a '93. Consensus on three major forums was to avoid '93s like the plague because of the 1-year-only goofiness and "inability" to remove TCS.

I struggled with getting access to information-- especially with finding complete and accurate wiring diagrams. It took me a while to learn how to use T5 Suite and reprogram my ECU. Relatively recently, as you can see in this thread, we've struggled to figure out how and where to make wiring connections.

SO thanks for stopping in and sharing your knowledge... some of us are dumber than trained monkeys and can really use the help
Sorry, I met no disrespect. I was a member of ecuproject a long time ago and I had access to all the wire diagrams from the start. Really, that website is what made it easy for me so I guess I should thank them...
02-16-2012 07:24 PM
dantinne
Quote:
Originally Posted by john85020 View Post
Independent of the guide on here. But I've looked through it and everything seems pretty similar, my guide is just a little more complete IMO. I've actually been planning to do this conversion since I got the car two years ago. Then TCS never had any problems so I stuck with it.

There's really not much to it, just rerun the wiring according to the schematic then find out which parts work from the EPC. Honestly, a trained monkey could have figured out how to do the conversion
I could have used your wisdom two years ago... back then, I couldn't find anybody who has removed TCS from a '93. Consensus on three major forums was to avoid '93s like the plague because of the 1-year-only goofiness and "inability" to remove TCS.

I struggled with getting access to information-- especially with finding complete and accurate wiring diagrams. It took me a while to learn how to use T5 Suite and reprogram my ECU. Relatively recently, as you can see in this thread, we've struggled to figure out how and where to make wiring connections.

SO thanks for stopping in and sharing your knowledge... some of us are dumber than trained monkeys and can really use the help
02-16-2012 06:58 PM
john85020 Independent of the guide on here. But I've looked through it and everything seems pretty similar, my guide is just a little more complete IMO. I've actually been planning to do this conversion since I got the car two years ago. Then TCS never had any problems so I stuck with it.

There's really not much to it, just rerun the wiring according to the schematic then find out which parts work from the EPC. Honestly, a trained monkey could have figured out how to do the conversion
02-16-2012 06:15 PM
dantinne Is your guide based on the info already posted here?

If you developed it independently, I'll take some the time to compare the two and make sure they agree.
02-16-2012 05:31 PM
john85020 SO, add me to the list of people with a non-tcs '93 turbo. I made a decent (well, i think it is) guide for anyone else who wants to try:

Saab Trionic TCS Removal

The only problem I've noticed is a somewhat high idle (1500-1700 rpm) sometimes on decel. Pretty sure it's just a sticky throttle cable though.

-John
11-10-2011 08:39 PM
zedsup83 I have been reading and reading and i still can not figure this out. I have a 95 aero and i just recently pulled the engine and tranny. Before that the car was running fine no TCS issues or limp mode. now it will not stop doing it. this is pissing me off and making me want to give up. here in california it is kinda hard to find the parts i need to remove the ETB, maybe someone somewhere else can help me with the parts i need?
11-04-2011 03:24 PM
as10en If you want to put TCS "to sleep" I can tell you how to do it. It will make sure the system never comes on but as the guy mentioned before it wont help you with LHM or codes. Leave the four wheel speed input wires in thier stock configuration going into ABS ECU so you get correct ABS function but change them into ASR (if an automatic), or TCS (on a manual). Swap the LF with the RR, the RF with The LR. I tried it first front to back (LF to LR, etc.)to front and it did not work. I then tried "crossing" them and it worked. The ECM thinks it is looking at the rear wheels as a constant and it's looking for wheel slip in the front. So swaping front to back makes sense. The ECM is tricked into thinking the front wheels are the constant. But why did I have to swap side to side too? I did this 9 years ago and last week I found out why! My girlfriend is great, she rotates my saab manuals in and out of the magazine rack. I was sitting on my throne reading 1993 ABS manual and there it was in the description of operation right in the begining! The brake circuts are split LF and RR, and RF and LR instead of the front being one circut and the back another. Well I'll be!
PS you cant run 94 9000 T5 on a 93 9000 because the crank pickups are different (not compatible) the pickup wheel is on the crank pulley on the 93 but on the crank on the 94
11-04-2011 03:09 PM
WSW
Quote:
Originally Posted by as10en View Post
the tcs system was so problematic in 93 that all 94 9000's were regular throttle cable cars. tcs was reintoduced in 1995
I believe in 94 it was an option, i could be wrong though but i dont think i am
11-04-2011 03:05 PM
as10en the tcs system was so problematic in 93 that all 94 9000's were regular throttle cable cars. tcs was reintoduced in 1995
09-07-2011 09:40 AM
sp53 Thanks Dantinne for your note. If I go that route, I would really appreciate the help. I purchased my first Saab 9000 6 years ago and have since made them my hobby. I have done most the general repair problems like, CPC, water pump, alternator, fuel pump, CV, brake master cylinder, heater and a couple of auto boxes. Purchasing the 93 fixer was something I thought I could handle, but when I found out that the ETB had to be calibrated and that the vehicle could go into this LMH, I was surprised. The one local Saab shop has the tech 2 stuff but was reluctant to work on the vehicle. He felt he would be into it 4 hours @105.00 and I more than likely needed an ETB. He commented most people do not want to stick that money into 93 and referred me to a shop in Seattle called, Scan West. I understand they are an off shoot from an old Saab dealer. I called them and they said sure for 60.00 we can tell you what you need. They have a good reputation. My thinking is I will most likely be back at the 800.00 mark with one of those rebuilt ETB and the possibility of LMH problems later. Plus I have to get the vehicle the 30 miles to Seattle and I have never driven it. It had not been tagged since 06 and the auto box had 4 naturals. I put a new oil pump into the auto box and now it at least has one forward and Reverse. (I just drove it in the drive way). The engine compression is equal, but again the throttle body will not let any air in, so it runs horrible. The 92 I have has 250k and a knock. It is a very basic model and has some attributes of an earlier 9000. For example, the radio hook up is like my 89. Would you know if there is an over lay on the 91 and 92 vins because it sounds like the 91 is more desirable donor vehicle for a conversion.
Steve
09-07-2011 05:35 AM
dantinne
Quote:
Originally Posted by sp53 View Post
Wow and thanks I read your posts and found some hope. I just purchased a 93 Saab 9000 with ETB and TCS and it runs horrible. The car had low miles and nice interior, but I did know about the ETS system. No wonder it was a cheap fixer upper. The ETB is locked up, so can I convert a 93 back to standard throttle. One of the post suggested negative. I do have a 92 w/o and a 93 w/o ETS for parts. I did see the information about the rebuilt ETBs also, so perhaps that would be best. However, I would to just like to make the vehicle more mechanical and eliminate ETS.
Steve
I was able to remove TCS from my '93 Aero, but I've owned 9000's for 15+ years.

Buying a '93 9000 fixer-upper -- without even knowing about TCS-related problems -- suggests that you're new to DIY Saab repair.

If that's the case, then I'd suggest that you set a limit to the amount of time and money that you'll spend on diagnosing and fixing TCS-related problems. It's likely worth your time to troubleshoot the check valves, clean the throttle body, and take to dealer and/or local Saab specialist and have the system calibrated.

-----

That said, if you do decide to remove TCS, I'd be glad to help.
09-06-2011 06:18 PM
sp53
93 9000 with ETS

Wow and thanks I read your posts and found some hope. I just purchased a 93 Saab 9000 with ETB and TCS and it runs horrible. The car had low miles and nice interior, but I did know about the ETS system. No wonder it was a cheap fixer upper. The ETB is locked up, so can I convert a 93 back to standard throttle. One of the post suggested negative. I do have a 92 w/o and a 93 w/o ETS for parts. I did see the information about the rebuilt ETBs also, so perhaps that would be best. However, I would to just like to make the vehicle more mechanical and eliminate ETS.
Steve
08-29-2011 03:03 AM
VI009DZ Looking for confirmation here.

I am using a 1991 9kT harness from the bulkhead forward. In order to use that, do I need to rip apart the factory 1992 harness that connects to the bulkhead AND the DI/APC box under the bulkhead, and basically separate out everything connected to the DI/APC box, keep it in the car, and pitch the rest of it?

The 1991 harness has no connections for things like speedometer sending unit, crank position sensor and a 2-wire plug on the back of the block (coolant, oil pressure?). The 1992 harness does.
08-28-2011 07:59 PM
132417SAAB Why is it that when you do the delete you loose cruise control?
08-28-2011 10:28 AM
Ninety5Aero ^^The APC/DI ECU under the bulkhead on the '92 stays intact with it's harness. I forget what the story was with the sensors. I don't think I had issues there.
08-28-2011 10:24 AM
VI009DZ I am halfway through this an need some clarification.

1) Crank position sensor and speedometer sending unit plug ends were different from the 1991 donor car, to the 1992 recipient car, so I swapped all that stuff over, but I notice that those plugs dont attach to the round-plug, firewall-forward harness on the 1991 (I believe they did on the 1992, but could be wrong.) Did these need to be swapped? Where do they attach to the 1992 car's factory harness?

2) ECU's and stuff. Each car has a metal jetronic ECU? under the bulkhead, but the 1992 also has a plastic APC-looking box, similar to a C900 under the bulkhead. The 1991 does not. Is there something else I'm missing on either car? I didn't find anything under the seats in the 1991. Do I just swap the metal Jetronic boxes add the wires and go?
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