Chevrolet LS3 and 6L90 electrical data

[100SRV]

Hi,
please could someone assist with finding out the following for Chevrolet LS3 and 6L90 transmission?

Pin allocations for interface connector to vehicle
Mating connector part number
Any circuit diagrams
How the engine communicates with the transmission (databus?)
Shift selector interface
Start lockout and start inhibit relay wiring

Is there a good source book I could buy?

Hope someone can help...
100SRV

[stevieturbo]

100SRV said:

Hi,
please could someone assist with finding out the following for Chevrolet LS3 and 6L90 transmission?

Pin allocations for interface connector to vehicle
Mating connector part number
Any circuit diagrams
How the engine communicates with the transmission (databus?)
Shift selector interface
Start lockout and start inhibit relay wiring

Is there a good source book I could buy?

Hope someone can help...
100SRV

Maybe try asking on LS1Tech or YellowBullet ? Or the Camaro5 forum ?

But presumably the engine ecu controls both engine and transmission, so there isnt comms between them as such, just sensor feedback to the ecu from both.

[Doctor Volt]

stevieturbo said:

Maybe try asking on LS1Tech or YellowBullet ? Or the Camaro5 forum ?

But presumably the engine ecu controls both engine and transmission, so there isnt comms between them as such, just sensor feedback to the ecu from both.

Wrong Transmission ECU's have been hooked up to the Controller Area Network for many years

The 6L90 is also in the below Link

http://www.novak-adapt.com/knowledge/transmissions...

Technology
The use of three-way solenoids and variable bleed solenoids for improved shift quality. The transmission is automatically shifted featuring performance algorithms to minimize upshifts during closed throttle driving to prevent unnecessary shifting. It can also be controlled under DSC, or Driver Shift Control, e.g., "tap shifting". Maximum shift speed is 6500 RPM.

The Transmission Control Module (TCM) is an adaptive learning, 32-bit computer integrated into the valve body of the 6L80 and communicates with the Engine Control Module via the onboard vehicle CAN bus network. This is both a return to and a departure from previous automotive control systems in the industry in that earlier electronic transmissions used a separate control module, later to be integrated into the Engine Control Modules which were thus termed Powertrain Control Modules. Now, the high-speed CAN network allows a high rate of data sharing between the units to achieve a collaboration between both engine and transmission functions. The TCM is actually even programmed to adjust its operation for transmission clutch wear.

Edited by Doctor Volt on Friday 30th January 13:20

[Doctor Volt]

100SRV said:

Hi,
please could someone assist with finding out the following for Chevrolet LS3 and 6L90 transmission?

Pin allocations for interface connector to vehicle
Mating connector part number
Any circuit diagrams
How the engine communicates with the transmission (databus?)
Shift selector interface
Start lockout and start inhibit relay wiring

Is there a good source book I could buy?

Hope someone can help...
100SRV

I cant find any information to help you but will keep looking

[100SRV]

Thank you Doctor Volt!
Is it J1939 CAN as per Allison transmissions or a protocol proprietary to GM?

I'd already worked out that there were seperate engine ECU and transmission ECU...I have a contact in the United States whom I am dealing with now but we are working to an exceedingly tight timescale hence the need for multiple enquiries in different places.

regards
100SRV

[Doctor Volt]

100SRV said:

Thank you Doctor Volt!
Is it J1939 CAN as per Allison transmissions or a protocol proprietary to GM?

I'd already worked out that there were seperate engine ECU and transmission ECU...I have a contact in the United States whom I am dealing with now but we are working to an exceedingly tight timescale hence the need for multiple enquiries in different places.

regards
100SRV

Yes I already knew by your opening post that you knew about the system layout but needed as much information as possible regarding communications and all other circuits

My post was to help educate a guesser

Sorry I have no information for you but will keep looking

I will get on it now and post back here if I find anything that may be of help

[100SRV]

Doctor Volt said:

Yes I already knew by your opening post that you knew about the system layout but needed as much information as possible regarding communications and all other circuits

My post was to help educate a guesser

Sorry I have no information for you but will keep looking

I will get on it now and post back here if I find anything that may be of help

Hi,
apologies DV, been a hectic week and I didn't check my original post before replying.
Surprised at so few responses to my question...thank you for your help!
100SRV

[Doctor Volt]

A very big good quality diagram Link -

http://cjnn.xtremefabricator.com/lsxtech/2007Silve...

Pinouts

http://www.lt1swap.com/E38%20ECM%20Connector%20Pin...

Above Links taken from below Link

http://ls1tech.com/forums/generation-iv-external-e...

In the above Link a poster comments - "but for those that don't know, you can go to Autozone and register. This allows you to plug in your vehicle make, model, and year and get any wiring diagrams (or assembly guides) you may need"

http://www.autozone.com/

Bearing in mind I know nothing about what you have or are planning to do

I am searching blind here as I dont have enough information as in - What did the engine and transmission come out of and how old are they

[Doctor Volt]

100SRV said:

Hi,
apologies DV, been a hectic week and I didn't check my original post before replying.
Surprised at so few responses to my question...thank you for your help!
100SRV

Please dont apologise to me 100SRV, I just took a look at your profile and now feel your frustration due to a time schedule

There is nothing worse than knowing what you want to do and how to do it yet struggle day in day out for wiring diagrams and information

If you are working for a vehicle manufacturer or have contacts - Is there a possibility that one manufacturer may know someone at another manufacture that knows someone at another manufacturer.....that will be able to help

As you are well aware JLR has contacts with America....

Edited by Doctor Volt on Friday 30th January 14:54

[Doctor Volt]

http://www.pro-touring.com/threads/80356-LS3-Wirin...

http://www.lt1swap.com/2010camaro.htm

http://www.lt1swap.com/2010camaro_ecm_pinouts.htm

http://www.lt1swap.com/2010camaro_x102.htm

http://www.lt1swap.com/2010camaro_underhood_x3.htm

[e-mail]

The below Link may be of use

http://www.pro-touring.com/threads/76217-BSharpe-s...

[Doctor Volt]

I have no idea if any of this or the above is of any use to you

http://www.tbmsport.com/6l80gm6spdinformation/6l80...

Taken from above Link

"Can my pre-2007 Engine/Harness be converted?

The Engine Control Modules (ECM) that communicates with the 6L80/90 Transmission Control Module (TCM) is programmed to only recognize Gen IV LSx engines. Specifically the 58X crankshaft reluctor ring, the 4x cam shaft sprocket, and relocated externally mounted knock sensors. The pre-2007 model year Gen III and Gen IV motors (LS2 Corvette notwithstanding) operate with a 24x crankshaft reluctor ring, a 1x camshaft sprocket, and knock sensors located internal to the engine.

A mechanical solution has already been designed, however, as it requires an additional harness and partial engine disassembly we are presently only going to offer it as an installation only service."

[Doctor Volt]

2010 TRANSMISSION Automatic Transmission - 6L45/6L50/6L80/6L90 - Camaro

http://www.anxa.de/camaro2010/werkstatthandbuch/au...

http://www.eficonnection.com/eficonnection/58x.asp...


This below PDF File may prove to be the best yet

From Google - paceperformance.com/files/pdf/19244807E-ROD.pdf
automatic transmissions and 17 pulses per revolution on manual transmissions. ... the 6L80 & 6L90 Transmissions. Axle Ratio and Tire Size ... GM. Parts List: These instructions cover the following packages: LS3 6.2L (Auto). LS3 6.2L (Man)



http://paceperformance.com/files/pdf/19244807E-ROD...

Edited by Doctor Volt on Friday 30th January 16:41

Edited by Doctor Volt on Friday 30th January 16:42

Edited by Doctor Volt on Friday 30th January 16:53

[Doctor Volt]

These below Links could be The Holy Grail

I found a Link in the below forum

http://ls1tech.com/forums/conversions-hybrids/8988...

Reading through it looks like Schematics for many vehicles are available here -

http://www.repairprocedures.com/login/

Going to spend another half hour on Google then I must try and achieve what I had planned for my day

Will keep posting any of my finds here

[anonymous-user]

100SRV said:

Hi,
please could someone assist with finding out the following for Chevrolet LS3 and 6L90 transmission?

Pin allocations for interface connector to vehicle
Mating connector part number
Any circuit diagrams
How the engine communicates with the transmission (databus?)
Shift selector interface
Start lockout and start inhibit relay wiring

Is there a good source book I could buy?

Hope someone can help...
100SRV

What are you trying to achieve? If you want to run the transmission or engine "standalone" then you'll almost certainly have to "spoof" the std CAN data transfer, to make either think it's talking to the other! I'd be amazed if it's J1939 in a passenger car application, much more likely to be a propriety protocol. As it's quite old, it probably not that complicated, unless it includes "torque up" demands from the gearbox, which required extra validation by the EMS safety supervisor before they are ratified. if you have both ECU's and a loom, it would be easy enough to tap the bus and see what's going backwards and forwards between the devices.

[Boosted LS1]

I can see the appeal of a TH400 on a carbed LS, lol.

[Doctor Volt]

Many sites I have visited point back to this Link that I posted above

http://lt1swap.com/2010camaro_ecm_pinouts.htm

Edited by Doctor Volt on Friday 30th January 21:08

[Doctor Volt]

In the page of the below Link is a picture of the ECU Pinouts for 3 Plug LS3

http://ls1tech.com/forums/conversions-hybrids/1654...

[Doctor Volt]

100SRV

I have noticed that when using the search function of some Websites a result is refused and I get redirected to the login page

Should you not know how to get around the above search problem I post it below as it can be of great help with difficult topics that are not all over the Internet

Use Google Advanced Search, type for example (Wiring Diagram) in the top box, type the main address of the Website where it asks for "site or domain" and click the Advanced Search Button. This method has been working very well today and has saved me the time of having to register with a website to be able to search it

[Doctor Volt]

More Pinouts at below Link

http://www.g8board.com/forums/showthread.php?t=234...

[Doctor Volt]

http://www.pistonheads.com/Gassing/topic.asp?h=0&f=20&t=1466112&nmt=LS3+ECU+and+Factory+harness

Contact posters at the above topic as they may well be able to help you