Read DTCs from 1996 LT1
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Joined: Apr 2002
Posts: 58
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From: Dresden, Germany
Read DTCs from 1996 LT1
Hello Forum,
I couldn't find anything according to it in the forum: is there a possibility to read DTCs for a 1996 LT1 without a cable+scan tool or a code reader? Maybe someone has a Service Manual and there is a similar way as for the OBD-I LT1s? A sequence holding and pressing keys maybe? The OBD-I paper clip approach does not work right?
Thanks in advance and greetings from Germany,
Heiko
I couldn't find anything according to it in the forum: is there a possibility to read DTCs for a 1996 LT1 without a cable+scan tool or a code reader? Maybe someone has a Service Manual and there is a similar way as for the OBD-I LT1s? A sequence holding and pressing keys maybe? The OBD-I paper clip approach does not work right?
Thanks in advance and greetings from Germany,
Heiko
Le Mans Master
Joined: Feb 2000
Posts: 9,715
Likes: 27
From: Kempner Texas
Yes, you read them by just using a paper clip/wire, etc., plugged into the Assemby Line Diagnostic Link.
Ground terminals 12 and 5 (or 4 and 12 - both 4 and 5 are grounds). Then turn the ignition key to on BUT DO NOT START THE ENGINE.
Then you'll need to review Section 8D-1 through 8D-10 for which dash buttons to press or just let the system just run automatically. Any code will be displayed on the dash.
Jake
Ground terminals 12 and 5 (or 4 and 12 - both 4 and 5 are grounds). Then turn the ignition key to on BUT DO NOT START THE ENGINE.
Then you'll need to review Section 8D-1 through 8D-10 for which dash buttons to press or just let the system just run automatically. Any code will be displayed on the dash.
Jake
Race Director
Joined: Apr 2000
Posts: 15,344
Likes: 4,009
From: Texas
Can't jumper and read PCM codes on a '96. OBD II uses a 4 digit code (technically 5 since the PCM codes start with a "P") but the speedo can only display three digits.
You can get some of the other codes by jumpering and going thru the CCM (ie ABS, ASR, etc)...just not PCM (engine / transmission) codes.
You can get some of the other codes by jumpering and going thru the CCM (ie ABS, ASR, etc)...just not PCM (engine / transmission) codes.
Le Mans Master
Joined: Aug 2000
Posts: 8,838
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From: Australia
Thread Starter
Advanced
Joined: Apr 2002
Posts: 58
Likes: 0
From: Dresden, Germany
Thanks a lot guys, that was really helpful. Unfortunately I need to read the PCM DTCs because "Service Engine Soon" is on. I wanna find out what is wrong. The engine feels powerless, as it would only put out 200 HP.
And I understood I need an OBD-II code reader, either cable + PC software like Autotap or a standalone scanner right?
Greetings, Heiko
And I understood I need an OBD-II code reader, either cable + PC software like Autotap or a standalone scanner right?
Greetings, Heiko
Race Director
Joined: Apr 2000
Posts: 15,344
Likes: 4,009
From: Texas
Thanks a lot guys, that was really helpful. Unfortunately I need to read the PCM DTCs because "Service Engine Soon" is on. I wanna find out what is wrong. The engine feels powerless, as it would only put out 200 HP.
And I understood I need an OBD-II code reader, either cable + PC software like Autotap or a standalone scanner right?
Greetings, Heiko
And I understood I need an OBD-II code reader, either cable + PC software like Autotap or a standalone scanner right?
Greetings, Heiko
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