Tech 1A

[norwegianvette]

anyone who know where i can get a PDF manual for Tech 1A and for use on a 1993 car. I brought a manual but that was for older cars so i have the Tech but not a clue how to use it. Any help will be good.

Regards,
Steve

 

[Hib Halverson]

General T1A operation is the same from 1981 to 1993 so your older manual ought to offer some insight to use with a 93.

What software cartridge came with the tester you bought?

 

[norwegianvette]

General T1A operation is the same from 1981 to 1993 so your older manual ought to offer some insight to use with a 93.

What software cartridge came with the tester you bought?

Helpfull as allways It came with a MSC up to 1997, included 1996 model.
Tried on the car and it works but i don't dear to press anytrhing in case i do something wrong.

Regards,

 

[toptechx6]

I have a users guide in PDF format, but was unable to upload it here as an attachment, perhaps it is too large. PM me with an e-mail address and I will try sending it directly if you are interested.
Don't be intimidated by the tool, most screens are fairly intuitive and it is nearly impossible to cause any problems by pushing the wrong button. The "Programming" section might be one exception, but there are many safeguards even there that should keep you out of trouble.
Hook it up and start snooping around, that really is the best way to learn about it, have fun.

 

[norwegianvette]

I have a users guide in PDF format, but was unable to upload it here as an attachment, perhaps it is too large. PM me with an e-mail address and I will try sending it directly if you are interested.
Don't be intimidated by the tool, most screens are fairly intuitive and it is nearly impossible to cause any problems by pushing the wrong button. The "Programming" section might be one exception, but there are many safeguards even there that should keep you out of trouble.
Hook it up and start snooping around, that really is the best way to learn about it, have fun.

Thanks. I sent you an e-mail but in case i repeate it here.
stev-ber@online.no I take it slowly and safe and try to stay out of trouble

Regards,
Steve

 

[Hib Halverson]

I have a users guide in PDF format, but was unable to upload it here as an attachment, perhaps it is too large. PM me with an e-mail address and I will try sending it directly if you are interested.
Don't be intimidated by the tool, most screens are fairly intuitive and it is nearly impossible to cause any problems by pushing the wrong button. The "Programming" section might be one exception,

(snip)

Is it impossible to "program" the software calibration in the ECM of a 1993 model using a TECH 1A.

Do not worry about damaging the cal in the ECM.

What you can do with the T1 is "bi-directional" communication with the ECM. Part of that is taking temporary control of various engine actuators. For example. The T1 can control idle speed for diagnostic and service purposes. You enable that feature then, using the keyboard on the T1, control idle speed within a narrow range of RPMs. Of course, the rpm control is not permanent, ie: when you finish the task or just disconnect the T1 control of idle returns to the ECM.

 

[toptechx6]

(snip)

Is it impossible to "program" the software calibration in the ECM of a 1993 model using a TECH 1A.

Do not worry about damaging the cal in the ECM.

What you can do with the T1 is "bi-directional" communication with the ECM. Part of that is taking temporary control of various engine actuators. For example. The T1 can control idle speed for diagnostic and service purposes. You enable that feature then, using the keyboard on the T1, control idle speed within a narrow range of RPMs. Of course, the rpm control is not permanent, ie: when you finish the task or just disconnect the T1 control of idle returns to the ECM.

Thanks for the confirmation Hib, I believe the T1 can enter the mileage in a new CCM using the program function prior to accumulating 100 miles, but did not think it could change ECM calibration.
A guy on E-bay tried to sell me a cartridge he claimed could do so but I was pretty sure he was blowing smoke, glad I didn't bite!:L

 

[sportscar]

Alarm state in EEPROM to reset

Dear Mr and Mrs,
have you got some programming tool for a 92Vette - 92 SHOP SERVICE MANUAL says TECH1 ?
Following problem:
As I put the car from one place to another inside my garage, the alarm started.
My friend removed the minus cable from battery.
Now there is no spark and no alarm any more.
Lights are ok. ECM, PCM Readout tells no error.
Starter turns.
I suggest that ECM, PCM stored the alarm state in EEPROM. Is it possible to reset this ??
First thanks for your this answer.

I have another question to you.
I have a '92 Vette for spare parts. I saw in the GM 92 SHOP SERVICE MANUAL that it is necessary to program ECM or PCM everytime you change ECM or PCM or engine from one car to another.
Maybe this is the way to solve the problem. I am planing to change the motor in my next project anyway.

Thanks for your help
Armin

 

[geekinavette]

What is a Tech 1A? (out of curiousity)

 

[norwegianvette]

Tech 1 A

What is a Tech 1A? (out of curiousity)

It is a diagnostic tool which corvette garages used for reading codes and reprogramming of the corvette´s different systems.

Steve

 

[norwegianvette]

Answered by mail

 

[geekinavette]

For reading AND programming? From Hib's previous post I was under the impression that it was pretty much for scanning only...that you couldn't actually modify the engine parameters.

Is there a device that can do both, scan AND modify...say for an LT4?

(sorry to hijack...just curious)

Bill

 

[Hib Halverson]

The "TECH 1A" was the GM dealer scan tester from 1986 up to about 1996 or 97.

It cannot program calibartions (chips) used in ECMs up to 1993. I believe a T1A, with the proper accessories, could flash the EEPROMs in 94-97 ECMs with a new calibration the user supplied.

I think it can also program CCM after a CCM change.

Note the words "could" and "I think" above. i say that because it's been more than a decade since I used a T1A in the shop and I sold mine back about 2002, so I can't remember exactly some of the procedures. I'll add that the T1A is no longer supported nor are accessories or parts still available so anything you find is going to be Craig's List/eBay type items.

As for the question about a device which can both "scan and modify"...if you mean a hardware device, the answer is "conditional yes". There are a few high-end scan testers, such as Bosch TECH2 (see this web site Tech 2) which is the current GM dealer tester, which can both act as scan tester and can reprogram 94-up ECMs, however, they cannot write the software code for the calibration. You have to have that from a dealer or have to write it with another app, such as "HP Tuners", then bring that document into the T2 which flashes the EEPROM in the ECM.

There are also some software based apps which run on a PC which both help you write the cal, again, I suggest "HP Tuners", and with the addition of some hardware accessories, allow you to get the program from your PC into the ECM.

There are, also, PC apps that act strictly as scan testers and EASE is the best of them and the one I use when I use a software based tester. For more info, go to EASE DIAGNOSTICS

 

[geekinavette]

The "TECH 1A" was the GM dealer scan tester from 1986 up to about 1996 or 97.

It cannot program calibartions (chips) used in ECMs up to 1993. I believe a T1A, with the proper accessories, could flash the EEPROMs in 94-97 ECMs with a new calibration the user supplied.

I think it can also program CCM after a CCM change.

Note the words "could" and "I think" above. i say that because it's been more than a decade since I used a T1A in the shop and I sold mine back about 2002, so I can't remember exactly some of the procedures. I'll add that the T1A is no longer supported nor are accessories or parts still available so anything you find is going to be Craig's List/eBay type items.

As for the question about a device which can both "scan and modify"...if you mean a hardware device, the answer is "conditional yes". There are a few high-end scan testers, such as Bosch TECH2 (see this web site Tech 2) which is the current GM dealer tester, which can both act as scan tester and can reprogram 94-up ECMs, however, they cannot write the software code for the calibration. You have to have that from a dealer or have to write it with another app, such as "HP Tuners", then bring that document into the T2 which flashes the EEPROM in the ECM.

There are also some software based apps which run on a PC which both help you write the cal, again, I suggest "HP Tuners", and with the addition of some hardware accessories, allow you to get the program from your PC into the ECM.

There are, also, PC apps that act strictly as scan testers and EASE is the best of them and the one I use when I use a software based tester. For more info, go to EASE DIAGNOSTICS

You answered my next question....which is if HP Tuners can do a LT4 computer.

Thx for the info!

Bill

 

[Hib Halverson]

If you're going to try DIY cal work, I think HP Tuners is the best choice. Now...whether or not it supports LT4, I don't know but that web site of their's will no doubt tell you that.

 

[geekinavette]

If you're going to try DIY cal work, I think HP Tuners is the best choice. Now...whether or not it supports LT4, I don't know but that web site of their's will no doubt tell you that.

Ohhh heck I have been doing DIY cal work for several years now...just pondering converting from L83 to LT4. HP Tuners does seem to be the weapon of choice (where supported).

Thanks Hib!

Bill