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How to tell between OBD1 and OBD2 ecu's?

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Old May 18, 2004 | 01:01 AM
  #1  
253EK's Avatar
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Default How to tell between OBD1 and OBD2 ecu's?

i searched around but no luck.

i have a gsr ecu that i was told was obd2. but it plugs into my obd1 harness. how can i figure out what year the ecu is? someone told me that if it plugs into my harness it is OBD1.

what do the numbers on the sticker on the ecu stand for? any relevance to the year?

thanks
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Old May 18, 2004 | 07:19 AM
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Default Re: How to tell between OBD1 and OBD2 ecu's? (253EK)

All of this, courtesy of Team-Integra.net.



Here are all the ECU's found in Integras:

P61 92-93 OBD1 GSR
P72 94-95 OBD1 GSR
P72 96-00 OBD2 GSR
P73 96-00 OBD2 ITR
P74/75 92-95 OBD1 LS/RS
P75 96-00 OBD2 LS/RS
PG6 88-89 OBD0 (all models)
PR4 90-91 OBD0 LS/GS
PR4 92-93 OBD1 LS/GS
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Old May 18, 2004 | 09:30 AM
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Default Re: How to tell between OBD1 and OBD2 ecu's? (ScreaminTeg)

thanks ScreaminTeg

good lookin

does the numbers located on the sticker on the ecu mean anything?

TTT
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Old May 18, 2004 | 09:49 AM
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Default Re: How to tell between OBD1 and OBD2 ecu's? (253EK)

Yeah...the first 5 digits will always be the same.

The second set, which would read something like P75, is the model of the ECU.

And the last set of numbers and letters, such as A01, identifies the revision of the ECU. That means that dues to upgrades in emissions standards or something like that, the ECU was done to accomodate it. I.E. P75-A01 would be from a 94 LS and a P75-A04 would be a 98 LS.
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