I am wiring up the new engine harness into my hatch for my b18c and I have come across one problem with one of the connectors.
I have a 2p connector that is wired up right next to the oil pressure sending unit wire, but it isnt the 2p connector that is supposed to go to the sensor directly to the right of the oil pressure sensor. I forgot the name of that other sensor...

The chassis harness is from an 89 Si, and I picked up the engine harness used and never asked what year it was from, but that is the ONLY connector that isnt hooking up to anything.

Any insight on what this connector is?? Is it supposed to go there, cause if it is then I have the correct connector to splice on. I just need to make sure. If I could remember the name of the sensor then at least I could try and trace it easier. At the moment I am using the schematics in an 88 civic helms (mine is an 89) and that isnt helping much since the Si wiring changed drastically between the two years.

I am tired of looking and I cant find any info on this, and I have searched various sites, so any help is greatly appreciated.

Later,
BR

 

anyone?

 

I don't want to point you to the wrong sensor so best thing is to take a pic and post...I'm sure you'll get your help soon enough.

 

I am working on that part. I dont have access to a digicam so it is kinda hard for me to get to that. I am going to see what I can do about borrowing a friends camera so I can post some pics soon.

Later,
BR

 

I think that sensor is the ECT switch. It's what detects what the coolant temp is and triggers the circuit for the radiator fan.

Do you have any sensors on the water neck or thermostat housing that don't have wiring going to them? That is the new location for the ECT switch. Get the right plug and extend those mystery wires to the new location.

 

It is not the ECT. I already have the wire extended with the appropriate connector to the thermostat housing for that. Same thing I had to do when I had this engine in my integra.
I did go about and find some pics to help clear this mess up though, and here they are.

Here is a pic of what the back of the block looked like when I picked it up. It is a 2000 GSR block. Make sure to make note of the plug that is circled.

Here is a link to the picture if that one doesnt come up. Just copy and paste it into a new browser window... http://www.imagestation.com/pi...g.jpg

Here is what it looks like now, since I have pulled that plug out and installed the sensor that was previously in my LS block. Make note that the green sensor is in place of the plug that is shown in the above picture.

Here is a link to the picture if that one doesnt come up. Just copy and paste it into a new browser window... http://www.imagestation.com/pi...g.jpg


I hope this helps you guys out in helping me on this one. I am assuming that I dont even need this sensor for the setup that I am running, but I really want to make sure before I put it back on the ground and get it started up.

Later,
BR

 

Looks like and ECT to me... but I don't know B blocks well enough to say for sure.

 

Yes, it does resemble an ECT, mainly because they use the same design of connector. Although, my ECT is right here...


Here is the link for the original, just paste and copy into new window if necessary... http://www.imagestation.com/pi...g.jpg

Later,
BR

 

I believe that 2 pin plug that you are talking about is the Idle Air Temperature. When I helped my friend swap in the B16, it wasn't connected to anything at all cuz the B16 doesn't have that sensor. I dont know if the b18c has that, but I highly doubt it.

Steve

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by BR &raquo;</TD></TR><TR><TD CLASS="quote">Yes, it does resemble an ECT, mainly because they use the same design of connector. Although, my ECT is right here...

Later,
BR</TD></TR></TABLE>

Right - but didn't you swipe that sensor on the back of the engine from your LS?
So maybe you have 2 ECT switches now????

 

JUSTCRX - Are you thinking of the IAT (Intake Air Temp) sensor that is on the intake manifold??

4drEF - No, it actually cannot be the ECT from my LS. I had a 91 LS, and it used a TOTALLY different connector than the 92+ ECT's. It was two 1p connectors that looked identical to the oil pressure sensor 1p connector and it had a boot over it that looked like the oil pressure sensor boot, only bigger to accomodate for the larger sensor.
I would take a picture of it if I had the LS ECT sensor around. If I find it then I will, but it is completely different than the ECT's that people are used to working with now.

Later,
BR

 

the d16a and others used a two prong bullet connector, for the ect.
that is your ect for sure, i have the same block. just extend the wire to the water neck.

if you are doubting that it is the ect, just throw it all in and ground one of those pins on that connector and the fan will go on. hth

 

No, it is not the ECT. I already know that for sure.

Here is a picture of the back of the LS block that I was running in my integra (1991 LS) that clearly shows what sensors are on the back of the block.


Here is the link to the original just in case the above pic doesnt come up. Just cut and paste into new browser window... http://www.imagestation.com/pi...g.jpg

Ok, now to explain what is what...
The ECT is circled in RED.
The Oil Pressure Sensor is circled in GREEN
What the hell is that sensor circled in YELLOW???

Like I said, I have already gotten my ECT wires ran on this harness the same way that I had them ran on my DA harness when I had this b18c in my integra. I had to cut the 2 1p connectors off of the Si harness and extend the wires and put on a new 2p connector to reach the thermo housing.
The 1991 integra helms manual (factory service manual) says that the other sensor is an Oil Temperature Sensor and that is ONLY came on the USDM b18a's.
From what you can see on the previous pictures I posted up, the b18c block didnt have anything but a plug there when I got it and I had to pull that sensor off of the b18a to install there. The fact remains that I dont know for sure what, if anything, that sensor ever did for the b18c. I am starting to think that I didnt even need it.

That is it on that one. If anyone can tell me, or at least confirm what that third sensor is on the b18a block then I can rest a little easier tonight.

Later,
BR

 

actually come to think of it. it seems that sensor is for the ac system on the DA chassis only.

 

There is a chance it could be, but if I dont figure it out by tomorrow morning then I am just going to call the acura dealer and see what the hell that thing is. It is driving me crazy...

Later,
BR

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by BR &raquo;</TD></TR><TR><TD CLASS="quote">There is a chance it could be, but if I dont figure it out by tomorrow morning then I am just going to call the acura dealer and see what the hell that thing is. It is driving me crazy...

Later,
BR</TD></TR></TABLE>


I checked that sensor out a long time ago when dropping my B17 in. IF i can remember correctly, its an oil temp switch that controls the fans if the oil temp gets too hot. I remember following the wires for it in a schematic (sp?) and they went to the fans. U can leave it alone. Later B blocks come with a plug that replaces that switch, as we have seen in pics u posted.

 

fourthgenhatchB17 - Alright, so it is an oil temp sensor after all...
Did you leave your's in as a plug with no wires going to it then??

It is nice to finally have this figured out...

Later,
BR

 

Mine is still in the block with nothing plugged into it. I have a spare B16 block with an allen plug, and i was thinkin of using that plug in my B17 to make it look cleaner (even though u cant really see it), lol.

 

You sound as **** as I am when it comes to building engines, hehe. I gotta have EVERYTHING perfect or it just isnt good enough for me.

If I find the plug from the c1 block around then I will use it. If I cant find it then the sensor will be a good enough plug for me.

Thanks again for the info. Damn thing was driving me crazy.

Later,
BR

 

I hear ya...i am terribly **** about my **** (no pun intended). If u want to look at the schematic for yourself, check out the haynes (i think) manual. its whatever manual they sell at kragen/autozones. That way u know for yourself, for future references and what not. I remember when i came across that switch, all my wiring stopped and i had to find what it was.

 

I hear ya. Perfection is a must on all the cars that I work on and build...

I own the 91 and 94 integra helms manuals and the 88 civic helms manual and the only mention of that sensor is in the 91 manual. It does say that it is an oil temp sensor, but I wasnt exactly sure what its purpose was. It also says that it is ONLY on the USDM DA's. It is just something that honda ended up phasing out eventually I guess.

I just clipped the connector off of the extra wire and extended my oil pressure sensor wire then loomed them all up together and taped it up. Cant even tell that extra wire was ever there now.

Later,
BR