S2000 Under The Hood S2000 Technical and Mechanical discussions.

Can you fail OBDII inspection for a swapped ECU?

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Old 02-22-2007, 05:50 PM
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Well, in NY

The OBDII inspection equipment will do a verification check that the car is an S2000.

It will not read a vin, so your could would pass. As long as the CEL is not commanded on, and all the monitors have run (you can still pass with one un-ready monitor, as long as the CEL is not on)

1996-2000 cars can pass with two un-ready monitors.
Old 02-22-2007, 06:46 PM
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My current state of residence requires no emmisions testing. Yet.

I've also lived in the PRK (Peoples Republic of Kalifornia) and NY. both have different rules. My Pre-66 Barracuda was exempt from smog testing in both states, but not a safety inspection in NY.

My S2K would fail the visual inspection in PRK, but pass all OBD II monitors in both states, and fail a 4 or 5 gas analysis. So my car would be legal in NY, but illegal in the PRK, and nobody cares in Alabama. If I lived in Metro Atlanta my car would pass, as long as I didn't have a 5-gas ran or I put the convertor back on.

00-03 PCM's do not have a specific VIN encoded in them.They do communicate what kind of car they are. Later PCM's will communicate with Honda scan tools the full VIN. Replacement PCM's have the VIN encoded at time of replacement.
Old 02-22-2007, 07:52 PM
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Most here will attest I pride myself in knowing the OBD-II system very well (perhaps too well). In short there is ABSOLUTELY NO WAY for your car to communicate VIN info back to the ECU. Period end of story.

Utah

P.S. Slow....I know what a pain in the ass it is to come in here and get challenged every night on basic BS. But "Figure it out and Have Fun" is kind of un-moderator like don't you think?
Old 02-22-2007, 08:02 PM
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Originally Posted by Utah S2K,Feb 22 2007, 10:52 PM
Most here will attest I pride myself in knowing the OBD-II system very well (perhaps too well). In short there is ABSOLUTELY NO WAY for your car to communicate VIN info back to the ECU. Period end of story.

Utah

P.S. Slow....I know what a pain in the ass it is to come in here and get challenged every night on basic BS. But "Figure it out and Have Fun" is kind of un-moderator like don't you think?
Old 02-22-2007, 08:44 PM
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Originally Posted by Slows2k,Feb 22 2007, 09:02 PM
Been there! Most people don't have any clue what it takes to do what you do! I do...been there done that!

To all:
Please give thanks to the folks that are here nightly to direct traffic and provide insight (gained by being in here every night I might ad).

Utah

P.S. Slow don't tell them to get the H*** out. Only did it once. Hey I wonder if that's the reason there isn't a Chat Room anymore?
Old 02-23-2007, 05:37 AM
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[QUOTE=deathsled,Feb 21 2007, 08:25 PM] "An OBD II test is a simple plug-in computer check that verifies four things:
Old 02-23-2007, 09:17 AM
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now this thread has some awesome information! this is great guys!
Old 02-23-2007, 01:27 PM
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Originally Posted by Clone,Feb 23 2007, 09:37 AM
And uh, Utah... , and trust me when I say that the vast majority of ECUs are keyed with a VIN number, and it is readable through the diagnostic connector.
Utah said the CAR cannot send VIN info to the ECU.


Old 02-23-2007, 04:12 PM
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Originally Posted by Billman250,Feb 23 2007, 02:27 PM
Utah said the CAR cannot send VIN info to the ECU.
ha! well yeah, I guess if you take that literally... no, the car itself cannot send VIN information to the ECU. The ECU already has that information anyway...

come on man, replace your VIN sensor! haha
Old 02-24-2007, 10:18 PM
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So I passed inspection today with the AP1 ecu.

The best part was when I was watching the computer and the first thing it said was "checking VIN". I asked the guy about it and he says "oh yeah, they just recently started checking that in order to keep you from plugging it in to another car to falsify the inspection. Now, if you hook up another car to try and pass the inspection they'll shut down the station no questions asked."

I just kept my mouth shut about having an ECU that had a different VIN than my car at that point, haha. I'm sure it was really just checking to see if the VIN reported was really an S2000. The computer didn't seem to care.


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