faysalahmd

I had a D15Z4 as stock in my 99 Civic, with P2C OBD1 ecu.

I changed the assembly to D16 ZC sohc non vtec, with P76-902 ODB1.

I am getting a check engine light for
AT lockup control solenoid valve.

Its a 5-speed manual, and based on the ECU decoding, 9 means JDM (auto), 0 means 5-speed, so my ECU is manual or for Auto ?

How do i get rid of the check engine ? Do i need the AT lockup solenoid in manual transmission ? If no, is there any way u can get rid of the check engine light ? By ,i dont know removing any wires or pins from ecu ?

Thanks

TomCat39

If it's am OBD1 ECU, I suspect you can crack it open and see the resistors that would need to be removed and a jumper wire put in place on one of them to convert it to manual and also to verify it's an automatic.

Look up converting auto to manual OBD1 honda ecu and you should find a thread or two with pictures that show the two resistors. When you open your ECU if you see resistors there, you verify it's an auto ecu. And then you can do the conversion easily.

Or report back it's a manual ECU and hope someone has an idea of the issue.

OBD1 Trouble Codes:

Code 0 and 11 Electronic Control Module (ECM)
Code1 Heated oxygen sensor A
Code 2 Oxygen content B
Code 3 and 5 Manifold Absolute Pressure
Code 4 Crank position sensor
Code 6 Engine coolant temperature
Code 7 Throttle position sensor
Code 8 Top dead center sensor
Code 9 No.1 cylinder position sensor
Code 10 Intake air temperature sensor
Code 12 Exhaust recirculation system
Code 13 Barometric pressure sensor
Code 14 Idle air control valve or bad ECM
Code 15 Ignition output signal
Code 16 Fuel Injector
Code 17 Vehicle speed sensor
Code 19 A/T lock-up control solenoid
Code 20 Electric load detector
Code 21 V-TEC control solenoid
Code 22 V-TEC pressure solenoid
Code 23 Knock sensor
Code 30 A/T FI signal A
Code 30 A/T FI signal B
Code 41 Heated oxygen sensor heater
Code 43 Fuel supply system
Code 45 Fuel supply metering
Code 48 Heated oxygen sensor
Code 61 Front heated oxygen sensor
Code 63 Rear heated oxygen sensor
Code 65 Rear heated oxygen sensor heater
Code 67 Catalytic converter system
Code 70 Automatic transaxle
Code 71 Misfire detected cylinder 1
Code 72 Misfire detected cylinder 2
Code 73 Misfire detected cylinder 3
Code 74 Misfire detected cylinder 4
Code 75 Misfire detected cylinder 5
Code 76 Misfire detected cylinder 6
Code 80 Exhaust recirculation system
Code 86 Coolant temperature
Code 92 Evaporative emission control system

faysalahmd

Thanks for replying.

Its manual, it doesn't have the resistors RP17, RP18. The ECU code P76-902, 9=JDM auto , 0 = 5 Speed manual. What does the JDM auto means if its manual ?
Now that its confirmed manual ECU, why am i getting the Code 19 A/T lock-up control solenoid ?

TomCat39

Record a video of the CEL flashes, maybe you are miss-reading it. I know I suck at it and usually need others to confirm.

faysalahmd

I am sure its code 19, i have checked it with a diagnosing tool, as well as by counting the flashes too (one long flash (10) and 9 faster flashes (9) .

TomCat39

You have a Honda HIM and the software subscription for JDM OBD1 ECU?

OBD2 scanners will not work on OBD1 ECU's or even JDM OBD2 ECU's

Could you be getting code 10 then 9? if there is a little pause between the long blink and the 9 shorts, that is 10 then 9. IAT and Cylinder Postion 1 error (CYL).

faysalahmd

No, i don't have that. I went to someone who had a scanner, other than that, i also manually placed a jumper cable so that check engine will flash, and it was 19.

TomCat39

Well, I am not sure how a manual JDM ecu would be spitting 19 unless JDM flash codes differ than USDM ones. I don't think they do so I would suspect maybe you have a bad ECU.

tony_2018

No it shouldn't, so that means OP has an automatic ecu. So unless OP provides a video of the blinking CEL the assumption is its an automatic ecu.

TomCat39

The number on the ECU isn't automatic 902 is 9 - Japan 0 - Manual 2 - Version/Revision. As well as OP opened the ECU and noted no resistors in the key locations of an Auto ECU, RP17, RP18.

So, the assumption is a bad ECU in my opinion. I would like to see a pic of the ECU board as well as a video of the flashes, but no matter, the thread will likely fade away.