Another wiring question

Rrowlan2

New Member
i have searched for hours looking for an answer to this question specifically, and have found no definitive answers. I plan on swapping my obd1 d15b7 for a b16. I want to get the whole swap kit from hmotors, which comes with obd2 harness and ecu. I’m wondering if my stock obd1 instrument panel and accessories will work with an obd2 harness and ecu?
 

E_SolSi

Member of the 20 nut club
Moderator
VIP
You are better off running an OBD-1 ECU
Your car will not have several of the sensors and whatnot the OBD-2 ECU will be looking for

A P30 or a chipped and tuned P28 will work fine
 

Rrowlan2

New Member
You are better off running an OBD-1 ECU
Your car will not have several of the sensors and whatnot the OBD-2 ECU will be looking for

A P30 or a chipped and tuned P28 will work fine
Even if the swap kit comes with all of the sensors? I am only worried about whether obd1 instrument panels are compatible with obd2 ecu. Thanks for your response.
 

dilbeckskate

infamous
lol if the obd1 instrument panel is compatible ? lol... yes ... people swap obd2 motors into obd1 cars since the 90s and heres where you are over complicating this is A buying a motor from some jdm importer when there are probably healthy ones for a much better deal local to you esp for something like e b16 B your car is not obd2 soo you are missing alot of the obd2a stuff on your chassis itself for that harness to plug into C most direct swap for your car and for ease of tuning would be literally to drop that obd2 motor in and use literally everything on obd1 IIRC you just have to change to obd1 injectors and everything else plugs in and works , idk why you would think something silly like the tach signal and VSS would make the motor incompatible vs all the other components to the swap
 

Rrowlan2

New Member
lol if the obd1 instrument panel is compatible ? lol... yes ... people swap obd2 motors into obd1 cars since the 90s and heres where you are over complicating this is A buying a motor from some jdm importer when there are probably healthy ones for a much better deal local to you esp for something like e b16 B your car is not obd2 soo you are missing alot of the obd2a stuff on your chassis itself for that harness to plug into C most direct swap for your car and for ease of tuning would be literally to drop that obd2 motor in and use literally everything on obd1 IIRC you just have to change to obd1 injectors and everything else plugs in and works , idk why you would think something silly like the tach signal and VSS would make the motor incompatible vs all the other components to the swap
The kit comes with the ecu and all the sensors on the engine that the ecu is looking for. I’m just wondering if the plugs for my instrument cluster and things like the heater/fuel pump will be the same. I would prefer to use the obd2 ecu for data and troubleshooting reasons. I’m not trying to mess with hondalogger and crome. Thanks for taking the time to express your view on the matter. I don’t understand whether or not my cabin harness will function with the obd2 ecu. The obd2 engine harness will come in the kit.
 

E_SolSi

Member of the 20 nut club
Moderator
VIP
The harness that comes with the engine is really only useful for canabalizing for wires and plugs from. It is going to be for a RHD car which means that the cannon plugs are on the opisite side of the engine bay.

The JDM ECU is also speed limited at 180km/h (112mph)
And US scanners can't communicate with them

And again you will be missing a lot of sensors and equipment that the OBD-2 ECU needs to see (there is more than just what is on the engine)

Run the engine OBD-1 and save yourself a ton of headaches
 

reikoshea

HS Troll...And Mod
Moderator
VIP
Just to back up what E is saying. The harness from H-Motors is cut at the firewall, so you'll have the connector with a bunch of wire stubs, and the rest of the harness will be attached to the engine. It wont be plug and play anyway.

You're better off using the OBD-1 ECU. And as was already mentioned, there's a few downsides to using the JDM OBD-2 ECU.
 

Rrowlan2

New Member
The harness that comes with the engine is really only useful for canabalizing for wires and plugs from. It is going to be for a RHD car which means that the cannon plugs are on the opisite side of the engine bay.

The JDM ECU is also speed limited at 180km/h (112mph)
And US scanners can't communicate with them

And again you will be missing a lot of sensors and equipment that the OBD-2 ECU needs to see (there is more than just what is on the engine)

Run the engine OBD-1 and save yourself a ton of headaches
Thank you very much. Learning how to datalog an obd1 does sound easier. Assuming the jdm ecu can communicate to software through a Hondalog?
 

dilbeckskate

infamous
The kit comes with the ecu and all the sensors on the engine that the ecu is looking for. I’m just wondering if the plugs for my instrument cluster and things like the heater/fuel pump will be the same. I would prefer to use the obd2 ecu for data and troubleshooting reasons. I’m not trying to mess with hondalogger and crome. Thanks for taking the time to express your view on the matter. I don’t understand whether or not my cabin harness will function with the obd2 ecu. The obd2 engine harness will come in the kit.
YOU ARE NOT CONVERTING YOUR CAR TO OBD2 AND IF YOU DID YOU WOULD THROW STUPID AMOUNT OF CEL CODES IDGAF WHAT THE SWAP COMES WITH FROM HMOTORS - YOU ASKED WE TOLD YOU , you are missing the entire obd2 evap system and purge .. and you dont have to use hondalogger or chrome if thats really a concern for you .. use hondata s300v3 with the $$$ you are saving ( I meant to hit post on this hrs ago)
 

Vteccbooyy

New Member
Can someone please help me out!
I have a B16B I have the engine harness the ECU everything. I just need help on where everything on the harness plugs in like the location. Please and thank you!
 

CAFROG

Honda Minion
VIP
As a general rule of thumb, I use the engine harness of the chassis not the motor. I make the chassis' engine harness work by de-pinning and re-pinning the right plugs to old harness. OBD1 car means OBD1 ECU. Heck....I'd probably run an OBD1 ecu in an OBD2A chassis.
 
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