Buzz Kill

On my CRVtec, I am getting a code 9. The CYP sensor. Just where is this puppy located. I was under the impression it was in the distributor.

Vexamus

What OBD version is your ECU, engine, and chassis?

Buzz Kill

Sorry 'bout that. It is an '88 crx si obd 0 with a new distributor. First gen b16a on a B20B block

khang77642

I am having the same problem too.

poison

What ECU are you using and what Dist? the first gen b16?

and is your crx an si or hf? or a dx?

Buzz Kill

THe car is an SI. The ecu is a CRX si that has be reprogrammed by zdyne. THe distributor is a B16 aftermarket replacement from Canada that was new (newly rebuilt??) 60 days ago. I had the same problem in the original that I got with the engine. I also have an Apexi fuel and vtec computer but doubt that is part of this issue. (unless of course someone knows different.

poison

Well the CYP is located in the Dist going to the ECU on C1 and C2.

Verify it's plugged in and the CYP is functioning.

If you have something wired interupting it like V-AFC or anything, then you will need to disconnect it and verify your wiring with that.

YumVTEC

i know on ZC's the CYP is on the exhaust cam and not in the distributor. i don't know if this is the case for b16a's though. check to see if you have a sensor on the passenger side of the valve cover near the exhaust cam.

Vexamus

ok, kids, it's like this, I've done TONS of research on this.

You have to have your distributor match the OBD version of your ECU for BEST operating. In example:

My car

95 Accord Euro R Hybrid

OBDIIb Euro R H22A
controlled by an OBDI P30 with a Hondata s200
Custom built hybrid OBDI/OBDII harness.

Everything would have worked correctly save for the CYP sensor, they operate very differently between those two versions. The easiest solution is to match what your ECU's expecting. I have an OBDI ecu as stated above, so I just bought an OBDI H22A4 distributor with external coil. This has the CYP sensor in the housing and I can just leave the OBDII CYP sensor in the block, because getting to it is major work(sensor rotor is on the crank itself by the oil pump).

If you're running a B16A2 or the like, you're probably running a P30 or P27 ecu, which should be OBDI, pins B11 and B12 are the CYP sensor, just to clarify that. The wires on OBDI harness are orange and white in the distributor wiring and on the ECU side. TDC is Orange/Black and Black(or white, depends on where yours was built, but black and white are interchangeable). Ignitor signal is black/yellow and rpm signal should be blue. There are two other wires, that I can't remember but aren't very important, like power and ground or something to the ICM.

If I'm misinformed about your setup, please correct me. I'm not trying to sound all knowledgable by spouting off detailed **** when it's not even pertinent to what you're doing.

YumVTEC

nice setup mang!

poison

word.

Vexamus

heh, thanks guys.

Buzz Kill

PROBLEM SOLVED!!!!!!

Started getting the code occasionally, then I started getting it all the time. Following Helms instructions, measure resistance between blue/green and blue/yellow - looking for 350 - 700 ohms. Got it. Pulled bottom plug off ecu and measured resistance there. NOTHING. Measured continuity, got it. WTF.

Noticed that when I plugged in the two plugs into the distributor, I twisted them around each other, stretching the wires. I undid this unprofessional mistake and it solved the problem.

Vexamus

good for you man, I'm glad it was that simple. Mine was a nightmare of waiting for my obdi distributor.

sweet

iTrader: (5)

i just had a problem with code #9 on a swap. i changed out the 95 GSR dist. for a 94 GSR dist. and the problem went away. but now i'm wondering if the CYP sensor can be replaced on an OBD1 95 GSR dist.?? i'd hate to have to buy another OBD1 DOHC VTEC dist. to replace the faulty one i have now.

is it possible to rewire an OBD2 dist. or use OBD1 plugs in order to have it work with an OBD1 harness and ECU?