I recently bought a honda accord my first car ever first problem Was the ecu so I put a new one in then I changed plugs wires cap and rotor now my problem is the cooling fans won't come on when I shut the car off one comes on if I pull the fuel pump/ alternator fuse the both come on I could hook them to a switch but I want them to work right any suggestions the ecu light told me to change my coolant temp sensor so I did and the engine light went off but then came back on with same code any thoughts

 

Welcome to HAF.

Can we assume this is an LXi - fuel injected


Was this a code 6 (six flashes from the led under the seat)? Which switch did you replace....there are a few of them

 

Yes it is a lxi fuel injected I went and asked for a coolant temp sensor and changed that yes the ecu blinks 6 times

 

Which, where was this "switch".....the TW sensor is on the t-stat housing - where the upper hose connects to the engine.

From there, there are two connectors. One is green in color and the other is white (maybe yellow because of age).

Might download a manual for this car - it will help if we need to get into tracing wires to the ECU - https://www.hondaaccordforum.com/for...threads-40780/

Get the one for the 86 Accord, it comes with a few updates as well.

 

There were two side by side I change the one that the green plug goes into next to it is the white one I think that one is the sending unit isn't it

 

The TW/ECT is the white one...

The green one - closest to the pass side - is ONE of the cooling fan switches.

The one for the gauge is the "single" wire one almost 90 degrees of the green plug..pointing towards the firewall.

Also, if you loose any amount of coolant be sure to use the bleeder to remove said "air" from the system.

 

So on mine the green connector is closer tithe driver side and the white connector is on the passenger

 

That sounds like an issue.....on both the 88LXi and 89 LXi I have they are the other way around......now to know if the switches are reversed or are they pluged into the wrong one.......which would cause the code 6 and also cause the fan not to come on when the car is shut off.

Have a volt meter, a pan of water and a bit of time? One is a simple switch, on is a thermal resistor.

 

Well I pulled them both out the one on the passenger side has a larger I guess probe then the other does that sound right

 

I can't remember the "length" of the probes.

Do you have a volt meter to measure the resistance on the pins on the switches?