cooling fan computer 1992 3fe

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spencer arndt

spencer arndt

10 Year
Joined
Nov 29, 2014
Threads
20
Messages
218
Location
Utah
Okay so i have been working on a wire harness for my 3fe'd fj60 for about 6 months now. im finally down to the last few wires, making some splices and turning the key for the first time with the 3fe in my truck. but my actual wires are butting heads with my wire diagram. I actually cant find the cooling fan computer anywhere on any diagrams i have. so here is the issue: the computer is wired directly to the vss and my air injection vsv valve. now i do not know why it would be hooked up through those parts but clearly the cooling fan isnt as simple as i had previously thought. i have no way of finding this out because as far as i can tell this cooling fan set up was only this way 1991-1992 so there isnt a lot of info out there on this part, not to mention for some reason its completely non existent on my wire schematics and instead of the air injection vsv being hooked up through the cooling fan computer my schematics show it being hooked up to the engine ecu. please any info will be helpful.
 
i just dont understand why it has to be wired to the air injection vsv and the vss....but the cooling fan to vss wire could potentially just be a grounding wire for the vss and cooling fan computer.
 
Are you referring to the mouse wheel cooling fan on the driver's side front behind the headlight?

I don't how much help I can be because I deleted all of that stuff including the VSV and EGR on my 92. FWIW, I'm sure Mr T and the EPA had a valid reason for including it but I can't find one.
 
LS1FJ40 said:
Are you referring to the mouse wheel cooling fan on the driver's side front behind the headlight?

I don't how much help I can be because I deleted all of that stuff including the VSV and EGR on my 92. FWIW, I'm sure Mr T and the EPA had a valid reason for including it but I can't find one.
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I just posted a link and the part number to the part I'm referring to I'm just wondering if I remove the computer and cut the wire to the air intake vsv valve, if my air intake won't work.
 
spencer arndt said:
i mean i thought there was only one cooling fan so i guess i dont know how to specify which one.... the part reads: COOLING FAN 89257-60010 072900-0030
I believe it is the only cooling fan computer on the 1992 model. Cooling Fan Computer 91-92 [89257-60010-U] - $85.00 : CruiserParts.net, Toyota Landcruiser Parts
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OK, since you're not giving complete information, I'll just assume you're referring to the engine compartment cooling fan. That's the one that @LS1FJ40 mentioned. It is a squirrel cage fan that lives behind the left headlight and blows air onto the intake manifold.
It has an "ECU" which is simply a time switch, a thermistor that lives on the exhaust manifold heat shield, and a relay for the fan motor.
Power for the fan relay/motor comes from the DOME fuse. Power for the time switch comes from the ECU-IG fuse. There are no other connections. Ground for the motor is on the left fender. Ground for the time switch is in the right kick panel which is where it lives. The relay is in the left kick panel.

If this is not what you're referring to, then please elaborate.
 
Okay I'm sorry I don't know what more info than a picture of the part a part number and a description of where the wires are running from it I can give. I will post a video of the wires coming from the part. Thanks for the help guys sorry I can't be more elaborate.
 
Okay I really don't know how much more info I can give these are pictures of the part, if it helps yes the little computer is up by your knees under the dashboard I didn't take it out of the 80. Yes it controls the cooling fan inside the engine bay like I said I think it's the only "cooling fan" on the truck and if not it's definitely the only cooling fan that has an computer wired directly to a vsv valve. There's even pictures of the wire and the vsv valve itself if needed. I literally just need a wiring schematic that shows the blue wire going from the air injection vsv valve to a cooling fan computer.

IMG_0099.webp


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IMG_0102.webp
 
jonheld said:
OK, since you're not giving complete information, I'll just assume you're referring to the engine compartment cooling fan. That's the one that @LS1FJ40 mentioned. It is a squirrel cage fan that lives behind the left headlight and blows air onto the intake manifold.
It has an "ECU" which is simply a time switch, a thermistor that lives on the exhaust manifold heat shield, and a relay for the fan motor.
Power for the fan relay/motor comes from the DOME fuse. Power for the time switch comes from the ECU-IG fuse. There are no other connections. Ground for the motor is on the left fender. Ground for the time switch is in the right kick panel which is where it lives. The relay is in the left kick panel.

If this is not what you're referring to, then please elaborate.
Click to expand...

I'm sorry I'm trying to by clear I need to know how this "It has an "ECU" which is simply a time switch, a thermistor that lives on the exhaust manifold heat shield, and a relay for the fan motor" is wired up and why it's wired to the vsv
 
I mean if all of this isn't enough info I don't know what to say anymore I mean I thought a part number and a link to the part on a land cruiser website would have been enough so if there's any more info I can give please ask specifically for it I'm really in a tight spot
 
I guess I'm wondering how you are in a tight spot. It isn't needed to run the 3FE.

Numerous guys have removed them. I can try to trace it when I get home as my 92 is sitting in the garage at home.
 
LS1FJ40 said:
I guess I'm wondering how you are in a tight spot. It isn't needed to run the 3FE.

Numerous guys have removed them. I can try to trace it when I get home as my 92 is sitting in the garage at home.
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Okay so that's what I'm asking if I cut the blue wire off of my vsv valve is it going to run properly? I guess I need to know if the blue wire is sending a signal to the vsv from the cooling fan computer or if it's comin from the vsv to the computer. Because if the vsv is on the receiving end than I know this engine isn't going to run the Way I want.
 
THis wiring project has been a real bitch and the fact that I'm on my very last wire and it's the first and only wire that is different from my schematic, really really has my brain all jumbled up. Stress level 10 right now.
 
I didn't cut any wires when I removed my VSV. I just disconnected everything. I'm going to PM you.
 
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