Last week I successfully install my p28 with JUN chipped and it run very good, thanks to you guys. Now I had try my other P28 but with this one my check engine light always stay ON. It's not my chipped because I put the same chip that with my other P28. My solder are ok and everything was install resistor 10k, jumper on J1 and two capacitor 103. When I open J1 and leave the chips I read the code 20, but with the jumper on J1 the light stay ON. My ecu is 37820-P28-A00, I hope somebody have good idea because I really don't know !!

Thanks !!!!

 

Please I need some help !!!

 

I don't found anything yet so I already wait for some help !!!

 

No visible signs of burned chips? You know I noticed Hondata uses 1.1k resistors, I wonder if there's any merit to this.

 

I don't have visible burned chips. I had try to desolder R52, because I don't have this resistor in my other P28 but It's was not this. Do you have more information about where hondata but their resistors and do you think I should try this.

Thanks !!!

 

Well obviously a 1.1k will pass more current than a 10k, and so is inherently less safe, but I figure Hondata knows what they're doing. It won't give you a CEL code at all when you short the service jumper on the car? What car is it installed on?

 

When I short the service jumper with the ecu chip I can't read the code because the light stay ON, but when I open J1 in the ecu and leave the chip (I don't know if it's suppose to be the same then without the chip, but I try) I read the code 20 ? This is the code for Electrical Load Detector, defective circuit or unplugged / defective sensor. I don't had try the 1.1K because I am scare of blow the chip so before doing this I will try everythink else.

This ecu is install in my 98 integra with obd2-obd1 harness and the know it's good because I don't have any trouble with my other P28 ecu in the same car.

(Revision are not the same ? G02=good, A00=Bad ????)

 

I'm not sure what to tell you other than checking everything over to make sure it's right. Is this an OBDII to I conversion? If so have you used this harness before? Is the cars ECU wiring stock(unchanged)? Make sure all the solder points are solid, the eprom or eeprom is in fully and the right direction. Nothing else comes to mind aside from ECU swaps for diagnosis.

 

If somebody already had this kind of trouble I need to know how did you fix it. Who is the king with ecu I need some technical help, I am sure somebody know how too fix this **** !!!!!!!!!!