PR4 info

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Slammed90Lude

Senior Member
i checked the reference section and it says that PR4 ecus are OBD 0 and this auction says it's an OBD 1 ecu that came out of a 93 integra what's the story here can anyone verify this for me-
 
I have, what was sold to me, a PR4 OBD1 ecu too and i was also skeptical...i posted a question here and the answer i got was to see if it has three gray plugs (on the ecu in the auction) then it is OBD1
hope that helps ;)
 
Originally posted by Slammed90Lude@Jan 21 2004, 05:41 AM
three gray plugs on the outside of the ecu, where the harness would plug in? beacuse it has that

Then it is OBD I, OBD 0 has two, a green and grey, and OBD II(B) has four.
 
I thought that the obd0 ('90-91) had a window with a LED on top of the ECU housing for the error codes. The obd1 ('92-93) has a remote plug for a jumper. Is this correct?

stackof4ecus.jpg


Also, this image depicts the differences between ECU generations. From top to bottom: OBD IIb, OBD II, OBD I and OBD 0.
 
Originally posted by MofongoY2K@Jan 22 2004, 12:31 AM
The obd1 ('92-93) has a remote plug for a jumper. Is this correct?

92-95 have a seperate jumper that displays in the CEL.
 
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