dssenne

Thanks for your help Cougar (and everyone else!). I've replaced a few things before like starter, alt., axles, etc. but never got into anything electrical. I was always pretty intimidated by that. But when you look at the schematics and wiring diagrams, it's starting to seam a little less confusing. It's so great that folks on this forum are willing to take the time to help. I always feel great when I fix something my self and think about the money I saved!

Thanks for the info! And I'll check out the classified forum next time. Considering how much they probably cost new, I felt pretty good getting one for $80, but less is always good.

Bought an ECU from AA Autoparts in Little Rock for $80 including shipping. Put it in tonight and now my fan works!

After posting here and talking to my local mechanic, it seemed like the ECU was the only reason left why my main cooling fan didn't work. Bought one and put it in today, and it solved my problem. Paid $80 including shipping, so I'm happy.

They told me that it would work for me, so I went a head and ordered it. We'll see. At least it was only around $80 including shipping.

I'm looking to replace the ECU on my '92 Legacy. It's a FWD wagon. The sticker on the ECU is below: I found one online that has the same number, except that there's an F at the end (22611 AA930). They told me that it came out of a '92 Legacy, but if I get it and it turns out to not be the right one, I'm just out of luck. I've also seen ones that end in AA931. Mine also has the number A18-000RF6, but the ones online generally only list the 10 digit # above. Do you think that the one I found that ends in AA930F will work for me? Thanks!

Thanks to all who responded!

I tried the green connectors, but no response from the fan. Guess I'll see how much a used ECU is.

Do you mean connecting the two black connectors, below and to the left of the steering column? I did, and I got several codes, though none of them seem related to my problem of the fan not working. The codes I got were: 11 - crank sensor 22 - knock sensor 24 - air control valve 33 - speed sensor 35 - canister purge solenoid valve 42 - idle switch When I put the ECU in test mode, the fan didn't turn on. Though when I followed Cougars instructions for grounding the connector for the fan at the ECU, it did turn on.

Well I finally found the ECU. Not easy to get to the right pin (d17). Anyway, when I grounded the pin for the main fan, sure enough the fan turns on. So, what direction does this point me in? Since I made the fan turn on by grounding pin d17, does this mean that the ECU controls the fan by grounding or "un-grounding" it? If that's true, is there some sensor(s) that tells the ECU when to do this? I replaced the water temp sensor, thinking that was it, but that didn't fix it. I replaced the thermostat, in case it was the problem, but no luck with that either. Is there something else in the circuit that tells the ECU to turn the fan on?

The blower fan inside works fine, I meant the AC fan under the hood on the passenger side.

Well, I feel like an idiot! From doing some more google searching, it looks like the last image I posted is the transmission control unit, not the ECU. A post I read said that the ECU is located under the carpet on the passenger side. I'm going to check that out tonight.

Ok, now I'm really confused... The fsm shows the ECU as having four plugs with 22, 12, 16 and 26 pins. It looks like the pin for the m But my ECU only has three plugs with 16, 12 and 20 pins! Since the pins aren't labeled and my ECU doesn't match the schematic, I don't have a clue which pin to check!

Yes, it was the one with two wires. Not the one for the temp. gauge.

Cougar, thanks a lot for taking the time to respond to my posts. I really appreciate it. I do have a fsm so hopefully I'll be able to find the right pins in that. The section on the Radiator Fan shows a connection from the ECU at pin "d17" to FB-14 which says "To Power Supply Routing". When you say "relay coil" are you referring to the relays that I showed in the pictures above?