p28 ecu chipped by hondata, s200 + boost
88 crx si, b16a.. . car runs , but engine light stays on when i start it
how to check codes?

i've been told to find some wire and jump/short them, but where are they in a crx?

 

They don't exist on a CRX.

You might have SOME luck jumping the D7 pin on the ecu to a ground, and making the CEL flash the codes. But this is pure speculation.

The CRX originally had an ECU that had an LED and a window IN the ecu that flashed.

The P28 cars have a service connector in the passenger kick-panel to make the CEL flash.

It looks like this: http://www.honda-acura.net/for...80725

-PHiZ

 

slightly different application but when i swapped a sohc vtec into my friends EF i decided to do a full obd1 conversion so we used a conversion harness and p28. since he doesnt have the jumper harness like a car like a stock p28, we wired up a switch to ground so that he just flips that switch when he throws a code to check it. basically you just have to find out which pinout it is on the ecu and ground it to check the code. can't say for sure it's the same since its chipped to run a b16, but i'm assuming it would still be there somewhere. good luck

 

thanks for the info guys

 

Uh, D7???

Try D4 brown (service connector) to D22 grn/wht (sensor ground) just like the factory 92-95 Honduhs do it.

Every OBD0-OBD1 conversion harness I've built has a check engine plug tapped into those pins, it helps a lot sorting the codes when distributor wiring colors aren't what service literature claims it should be.

 

i did so, and i got 2 flashes.. weird?

 

does it do 2 quick flashes, pause, and then repeat? if so then you have code 2, which i think is o2 sensor

 

hm, i believe i'm getting a code 20, and a code 41

ELD, and O2 heater

??