Ok 90 cr-x. Originally auto was converted as well as a mpfi conversion. The wiring was done **** poor when I bought it last year.

Car runs great, problem is the CEL comes on and the blue pin connector when jumped does not read the codes. Is there an alternate way to pull the codes? Grounding a pin on the ecu or something. It's hard to diagnose a code when it's sparatic and doesn't effect drivability. Any help would be appreciated.

 

Is the car still OBD-0? If so when you turn the cars ignition to on, the LED on the ECU will flash the codes.

 

My apollogies. It's obd1 with a chipped pr4.

 

Make sure you are jumping the blue connector with the brown/white and a black wire coming out.

Maybe you accidently jumped the timing service connector?

Also what kind of obd-0 to obd-1 conversion harness? Usually there is a wire on those harnesses that you just have to ground out to throw the codes. In most cases it's pin D4 that you have to ground out to get the codes to throw, which is in the secondary bundle where the 4 wire o2 sensor vtec wires etc are.

 

thanks dephtone, great info, i didnt realize there were 2 different blue connectors, and im unsure the conversion harness, the wires are lime green. Ill go play with it and see what i can get. thanks again.