HW mod to be able to run late softwares in early (98-99) 9-5

[voodorush]

Hi,
I'm sure that article was posted in the bulgarian SAAB club forum by myself some 5-6 years ago but i was unable to find it so i checked the wiring.
And then i rememberd the whole thing...
There is wire missing from J61 crimp connection to H70-1 connector.
So the brake light signal (not the one for cruise control - there are 2 switches on the pedal - one normaly open and one normaly closed) goes to MIU/DICE etc but doesnt reach the ECU on pin 63.
It seems in pre-98-99 cars the wire exists from H70-1 to ECU cable,but lacks from J61 to H70-1.
Obviously in the late software versions a double check of the switches is performed for security reasons.
So what we need is a wire from J61 to H70-1 -> Pin-17 (you will need a pin too since its missing on the connector).
Actualy i wired directly brake light switch (29) pin3 with H70-1 pin17 since it was much easier - at least you can easly take-off the connector and work without laying like a dog in the pedal section.
And YES - this thing is never documented anywhere - once upon a time it took me 2 days scratching my head and measuring with a multi-meter to discover it.
I dont know why SAAB missed that in WIS,but this will help all 1998-1999 owners to upgrade to 2000-on spec ECU,as i did 5 years ago.

Cheers,
Stoyan

29-H70-1 copy.jpg

H70-1.jpg

[J.K Nilsson]

Just to make this lovley piece of information idiot proof (but nature will always make better idiots. ) I'd like to add that you must splice the new cable to the cable betwwen the switch 29 and crimp J-61. Check the following diagram out:

Brakelight.JPG

J.K Nilsson, one of the idiots.

[voodorush]

Nice adition
...and thanks for keeping things organized

Cheers,
Stoyan

[pussyinboot]

I have been taking a look at two different H70-1 connectors and there is no pin-slot or cable at 17.

Would it be OK to just connect it to pin 68 at the ecu?

[J.K Nilsson]

I have been taking a look at two different H70-1 connectors and there is no pin-slot or cable at 17.

I think you have a slot under a weather seal plug. Just use a long thin object to poke it out from the connector side of the connector piece.

J.K Nilsson

[J.K Nilsson]

It seems in pre-98-99 cars the wire exists from H70-1 to ECU cable,but lacks from J61 to H70-1.

The cable was present all the way in my mothers car, 9-5 MY -98.

J.K Nilsson

[pussyinboot]

It seems in pre-98-99 cars the wire exists from H70-1 to ECU cable,but lacks from J61 to H70-1.

The cable was present all the way in my mothers car, 9-5 MY -98.

J.K Nilsson

Hi!

Double checked at three cars this evening and two cable wires and all of them are missing pin and pin slot. Strange!

But, If i connect it directly to the ECU, would that not give me anything?

[J.K Nilsson]

Double checked at three cars this evening and two cable wires. Strange!

I am not sure what you mean.

But, If i connect it directly to the ECU, would that not give me anything?

If you already have that wire from crimp J61 and connector H70-1, you are done. Just flash a program and watch the Mlow in the Sid.

The connector point is already occupied at the ECU så it is an extra moment of connecting to the cable or unplug the connector and plug the new one in. I think it is easier to splice the new cable to the pedal switch and route it out to the Engine bay and connect it to the H70-1.

J.K Nilsson

[D.M]

what benefit to run late software in early 98 model?

[David]

Hello ..
My car is 2.0 9-5t 1998
software I have is: 98-00 Green 9-5 B205E EU 190HP Inj EA1YZA9C.47B.bin +SID+OBD

I have connected as recommended voodorush :-H70-1-pin 17 with the brake light switch (29) pin3, for access to OBD.
Can I generate "Check Control"? with OBD: p0140

What is a solution?
OBD off again?
What did I do wrong?

Thank you.

[lekonna]

thanks guys for the post BUT running a risk of looking like a total idiot, i've got few questions:

1) where the heck are these connectors in the car, schematics do not help. photos are better.

2) i've been running 01 aero sw on my 99 9-5 for like a year now, whats not working ?

[Fahrer]

I have been taking a look at two different H70-1 connectors and there is no pin-slot or cable at 17.

Would it be OK to just connect it to pin 68 at the ecu?

Pin 68 is not the correct pin. This one goes to injector 4.
I did´nt double check this and flooded cyl 4 with a wide open injector.
The right pin is no. 63, wire has the same colour (GN/GY)

[kvistarn]

did this to my -98 car yesterday, worked nicely, finally I can run newer bins, which also solved all my problems with fluctuating boost and strange behavior at higher rpms

[Viking]

I have a friend with My98 2,3t automatic and no tcs, i have download he´s original software from ecu and the ecu/soft is MY00, is this mean that someone has made this mod in this car? I have notice also that many many -98-99 car use MY00 ecu/sw with no problem, but some car´s don´t work with MY00 sw.

[faen]

Hey,

Actualy i wired directly brake light switch (29) pin3 with H70-1 pin17 since it was much easier - at least you can easly take-off the connector and work without laying like a dog in the pedal section.

I was just doing this one today, but I can't seems to grasp which switch it's. I got two switches at my braking pedal. One black connector with one fat red and one fat green cable. Then a green connector with thin red/gren and green/white cable. Both connectors have numbered pins from 1-4. Well maybe it's as simple as check the color of the H70-1 pin17 cable?


Regards
-Faen

[voodorush]

Yes - the color can be seen from my first post here (the images from WIS).
It should be green/grey in color cable diamater 1,5mm (pretty thick).

Cheers,
Stoyan

[faen]

Hey voodorush,

Thanks, that was the one I though just wasn't 100%.


Cheers!
-Faen

[jcarlson]

The presence/absence of this wire probably relates to manufacturing date of early 1998 cars (those that were built during 1997 maybe?). Mine is a late 1998 model (spring 1998 assembly) and has this wire already, runs 01 or 07-08 base SW without problems.

[gredd]

When does software start using this wire? Is it when they got ESP? How about old aero soft?

[mackan]

When does software start using this wire? Is it when they got ESP? How about old aero soft?

Seems like -01 softwares uses the brake check.