Hi all, i just change p13-n01 ecu for h22a jdm style to p30-010 auto ecu,
after reading about auto to manual conversion, i remove p30-010 RP17 and jump RP18 with wire, and chip it with p30h22a bin. But there check light with code 16, fuel injector. It is ok if i just disable injector test circuit in crome?

 

http://www.youtube.com/watch?v=ZZJhSW4gEZE

 

You should verify that there isn't something wrong with the injector circuit before you disable the diagnostic codes.

Start your engine and listen to the injectors. Take a long shaft screw driver and place the tip on the body of the injector. Place your ear to the other end of the screw driver. This acts like a stethoscope. You should be able to hear a loud clicking noise coming from each of the 4 injectors. If you do not then you will need to check the injector and/or wire harness.

 

Wow that new knowledge for me, thank for the tip for checking injector, i check it used small long screw driver as you said, all injector have clicking noise. but there little white smoke out from exhaust when car at idle, but it gone after car warm out. And is that true JDM engine dont have injector test circuit?

 

I don't think a JDM p30 has the circuitry for the injector test and he has probably used USDM P30 code or soem orther USDM ECU code.

 

I just download:

JDMHAFINA
Stock JDM H22 Street Tune, good starting point...tuned by Dennis McIntosh


i think this is USDM .bin

 

IC, I've never run into the JDM - USDM injector test circuit issue. If that's the case then you should disable the test circuit. Sorry


I agree that it was probably tuned on a USDM ECU. If you look down at the bottom of the screen in Crome when you have this .bin file open. It should tell you what ROM base is being used. P30 - P28 etc...etc...

 

Thank GhostAccord and Spunkster, the code 16 gone now, hm actually what injector test circuit for..

 

The circuitry tells the ECU if an open circuit is detected. This could be an injector unplugged or a break in the wire or internal circuitry break within the injector.

Why they didn't use this in JDM ECUs, who knows...

 

Look USDM more safety for engine, in my place it hard to find USDM part n engine extra buck $$$. Thanks, that explain it mean a lot for me. xenocron

 

Ahhh...new problem come, why car cannot go to reverse gear. it ok after i swap p13 to p30 for h22a, but today it cannot reverse even i put to reverse gear.. 1st - 5th gear can run perfectly..it is any effect to reverse gear if wrong tuning?

 

If this is a manual trans it won't have anything to do with the ECU/TCU. From what I have always been told. Reverse is usually the first gear that you have problems with when you need a new clutch kit. ???

 

Yup mine is manual trans, will open and check the clutch tomorrow...ah money involve here.. okay will i post after checking clutch..hope not have too much damage there..

 

By the way, my friend miss gear when high rpm..i think need to overhaul gear box..$$$ $$$

 

Check your clutch fluid level? You could try bleeding the clutch. If your clutch is in good shape and bleeding the system doesn't help it could be the clutch master or slave cylinder .

 

Mission done, just change new cluch kit..bleeding not help so just change with half cut part

 

After reading some thread, Some one said, H22a not fit with P30, is that true, since P30 do not have IAB and TCu.. Are H22a JDM engine have IAB and any effect if i used P30? Some said P28 more compatible for H22a.. Hmmm

 

A p30 ecu has most of the same functions as a p28 other then the knock board which is useless anyways. IAB is not supported by the p30 or p28.

In other words, a chipped p28 and p30 complete the same function.

A p72 & p13 supports IAB, however the p72 uses a different board which allows you to run systems like hondata on it.

The TCU is an external module, it is not built into the obd1 p13/p28/p72 etc.

 

thank mtber for the explanation, think to change to P72 soon, but what actually IAB (Intake air bypass) for, any additional advantage if i use this system? or it just give little change to power down low and power up top.

P72-000 JDM on list.. But it expensive in my area

 

Some P06 and P28 ECU main boards can have the IAB circuitry added to them easy enough. If the P72 is too rich for your blood you can look into having a chipped P06 ECU modified to have VTEC and IAB circuits added for a couple bucks.

 

Found this :http://www.xenocron.com/install/OBD1-IABs.htm maybe try this first. Thank God halfcut beside my house. Haha whose person i can borrow p06 to do some experiment.
GhostAccord

 

Hey it is possible adding new tach circuit control iab? example tach circuit detect > 5600RPM then give output to relay, relay on iab? Just the idea so i dont need to change new ecu..

 

Need variable resistor to calibrate which RPM we need to open IAB

 

You shouldn't need anything that complicated............

All you need is an available output signal on the ECU and the proper software to enable it. You could possibly use these outputs; ACC - Air conditioning clutch (A15) PCS - Purge Control solenoid (A20) PO2H - Primary O2 heater (A6) FANC - Rad fan relay (A12) MIL - Malfunction indicator light, aka CEL (A13) and there are a few more.

For example, with eCtune there is a menu that will enable you to select a general purpose output to enable the IAB solenoid. As long as the ECU you are using allows for the use of the specific components your good to go. And a chipped P30 has an EVAP (A20) output that you could use

All you need to do is set the RPM in the software and the ECU and the IAB solenoid do the rest.

 

Good information here Thank!! eCtune next reading