jumpin4abeat

So I have been having speedo issues and when I went looking I saw a bunch on harnesses not connected. What are they for and are they important? There are two large harnesses, a blue one and a gray one that look like they could go together but I dunno. If anyone has done a b20b swap in jersey could you pm me too.
Thanks

Former User

Pic 1 - The blue connector is fine. It's the C115 junction connector. Gray connector - in general, connectors can be identified by the colors of the wires.

Pic 2 & 3 - In general, connectors can be identified by the colors of the wires.

pic 4 - service connector. It's fine as is.

h22apwrd95

iTrader: (1)

The gray in pic #1 looks like a junction connection as well, half black and half yellow/black.

Former User

Yep. That's the C116 junction connector.

jumpin4abeat

sorry if this is dumb but im not really good with motors. What do you mean by a junction? I know that there are some harnesses that I will not have connected because this motor the guy put in is not vtec. Im assuming the two smaller ones are for the vtec. Would those junction connectors have any affect on me not getting a signal when I hook up my code reader? What about the one that the harness does not fit? Should I splice it and tie it in? Im not really sure what it does

Former User

A junction connector does not connect to another connector. It instead remains free and has a cap.

Post colors for all wires in the remaining unidentified connectors.

jumpin4abeat

ok is there any way to read the code im getting then besides using a reader? I heard something about using that harness behind the ecu. The thing is it will come on and once the car is turned off it wont come back til I drive a few miles. Could it be because the speedo harness is not really firmly attached? It wont click down so I dont know if its a bad speedo or cluster cause my guage just stays at 20mph and odometer does not change

Former User

Click the CEL link in my signature.

jumpin4abeat

this will work even if it goes away once i turn the car off? ill give it a shot. A paperclip can work as a jumper correct?

HondaPartsHero

pics 2 looks like VTEC solenoid and VTEC pressure switch which would make sense, since the B20B doesn't have VTEC

pick 3 is the intake air temp sensor. The Si's had a square type and the B20 has a round type. If you can find a round connector swap it with the square connector. There plentiful in the junkyard.

Former User

Yes

jumpin4abeat

would this cause the car to run differently?

Former User

When you pull the CEL codes, you will probably get an IAT code. This will cause the engine to run a non-optimal fuel trim. The unplugged VTEC connector will be of no consequence if the ECU does not look for VTEC.

jumpin4abeat

Do any of you know if the harness going to the speedo meter, if its not attached firmly would it not work? It looks like to me that the snap part does not reach on the harness clip. I can push it down as hard as I can but it wont snap, all I need to do is lift the wire and it will come right off. Also if the speedo is not attached properly, would it also cause the odometer to not change?

jumpin4abeat

I looked at the ECU and it says that it is a b16 chipped. I dunno what that means but its what it says on the side. I did notice towards the bottom where a ton of red wires are it says for off road use only. Ideas? This car is my dd and it kinda worries me with all this stuff im finding. The car is fast still but cel scares me along with the stuff I am seeing.

apexi_rsx

what are all the codes list them so we can help you?... u need a chip for a stock b20b would cost 20 bucks for a basemap from phearable.net.

jumpin4abeat

so I pulled the code it was 17. speed sensor. That would explain why my speedometer is not working and just staying at 20 mph no matter what? also odometer not turning?

adamrich33

you have the wrong ecu for your engine, you need a non vtec ecu, the red harness you see attached to the ecu is a obd2-obd1 ecu conversion harness, obd1 ecus can be chipped and modded for performance. If you want to keep the motor you need to get a ecu for the motor or have someone write you a new map on the chip in the ecu you have now and remove the vtec from the ecu.

What type of transmission do you have, i believe some of the b series transmission speedo sensors have different plug in connection.

jumpin4abeat

The trans is the b that came with the original b16 motor. I was told that the vtec part will not read if they harness is not hooked up. I checked the speed sensor juswt now and i got continuity on the outter pins but not on the inner with either outter. Is there suppose to be c between both outter pins? I did the same to the harness and i got the same, both outters but nothing with inner.