Hi HT,

Well,I just bought 98 Honda Hatchback CX with D16Y5 motor (HX Model). Im having problems with the ECU and TCM/TCU. I have read that the HX model has the ECU and TCM/TCU separate while the CX model has both in one ECU. Im undecided either to install HX Model (D16Y5) harness or just swap back the CX motor. Im looking for a fast fix. Please let me know what you think is better? or if you think is something else. Hope to hear from you guys.

Thanks,
SGTechrepairs

 

It would be useful if you actually told us what problem you're having.

 

I don't think it's possible to be any more vague than you currently are.

 

Lol sorry i am half retarted so my car has no power till About 3100rpms even when my foots to the floor in all gears. Did a valve adjustment cuase it was making alot of ticking an the specs said int .007-.009 ex.009-.011 an still ticks an runs choppy till 3100 in all gears

 

just look for a used tcu on ebay

 

So what makes you think that's a TCU problem? Do you have any CELs? Have you checked your mechanical and ignition timing?

 

I'm have tranny problem. Its stuck on 3rd gear (car is auto). I have used the scanner and gave me TCU problem code.

 

Pull the tcm out and take the cover off and check to see if any of the resistors are burned or any capacitors are leaking. I had the same issue in my accord. The main relay went bad and caused the tcm to burn a capacitor and resistor

 

of course you're gonna have a transmission issue. hx tcm is separate from the ecu, but also an hx auto is cvt. all other d series are non-cvt with the tcm integrated in the ecu. swap the correct motor back in.

 

thanks for the info. what you think about rewiring the CX harness to HX. would it more of a headache and more expensive than swapping back the CX motor?

 

i don't see how you can run an hx auto motor with a non-cvt transmission.

 

how would i know if its a cvt tranny or not?

 

The HX was only available in CVT or 5MT. Look for the identifier code stamped/casted somewhere on the transmission.

 

Would you know where the code be? Tranny is installed would I need to take it out to know?

 

There's a VIN tag is attached to the front of the transmission. Enter the VIN into the VIN Decoder under Tech Tools.

 

That's the correct answer.

You'd also need the trans, and you'd have to fab up at upper transmission mount since the CVT HX chassis is different from every other '96 - '00 Civic. And you'd need to replace the cabin harness with one from an HX as well. The easiest and cheapest thing you can do it just swap the correct engine and ECU back in. The next easiest thing to do would be to swap in a manual trans and manual HX ECU.

You can't, well not without getting into the issues the OP is having.

 

ok i will be swapping the CX motor this weekend. Wanna thank everyone that has responded and have helped me. THANKS LOTS