[I need help finding out if I need a new Control Unit or ecu on a 90 loyale]

12 hours ago, Rampage said:

Download the FSM with the following link. As you can see, it is for an 89, but I think they are the same or similar, at least for power distribution. Put the cursor on the link and click the right mouse button. Then left click on "Save Target As", or "Open In New Tab". That option depends on what web browser you are using. If you have to click on Open in new tab, once the PDF is loaded you can right click on a blank area on the page and go to "Save As or Save" and select a folder.

https://jdmfsm.info/Auto/Japan/Subaru/--Old Models--/Subaru Loyale Leone EA 82 Service Manual 1989.pdf

Once you have the pdf file saved, open it. Scroll all the way to the bottom for the wiring diagrams. There are 8 different diagrams for 8 different models. Find the one for your model (upper left corner of each page, also lower left) and look at the bottom right corner for Battery, Fusible Links, IGN switch and Fuses. Follow the wires to the ECU and other items that do not work.

Some of it is hard to read but you can zoom in.

Thank you 

I’ll see what I find out 

[I need help finding out if I need a new Control Unit or ecu on a 90 loyale]

10 hours ago, Step-a-toe said:

It might help again if you can identify the wiring your gifted friend shorted out. Where it is located, more importantly the colours, main and trace

Someone may recognise it.

It’s all the main radio wires I don’t remember off hand but I’ll look 

 

[I need help finding out if I need a new Control Unit or ecu on a 90 loyale]

3 minutes ago, rickyhils said:

Without ECU the car will simply not run at all. I know that much at this point. You need to check voltage going into the ECU. Undo the three 12mm bolts at ECU and unplug connectors. I think check for voltage with the key at ON position. Not sure which pins.

I will see if I can find out the pins 

[I need help finding out if I need a new Control Unit or ecu on a 90 loyale]

On 6/28/2020 at 5:13 AM, Step-a-toe said:

Give us some background?

Was running fine for you for years?

Or you picked it up as a project with a no start?

Something that may help us help you.

Starting to think every no start needs to be asked for compression test and go from there.

Is it a broken dizzy side timing belt causing this no start?

Pull dizzy cap off and confirm rotor turns with engine, you have rotor at all and intact carbon brush inside centre of cap?

Know how to test a coil?

Back ground 

Got it to be a daily drive I drove it for about a month then my friend tired to put a radio in he didn’t discount the batter and shocked him self.   After this it didn’t start no spark          I checked fusible links, relays, fuses, new spark plug, new distributor cap does spin when cranking, new coil, new coil bracket made sure it’s wired right, spark plug wires are good

[I need help finding out if I need a new Control Unit or ecu on a 90 loyale]

On 6/27/2020 at 9:57 PM, rickyhils said:

Then as General Disorder said- power supply issue. Even if no codes you should see several blinks in succession as a normal "alive and well" indication.

So something it’s something with the ecu 

[I need help finding out if I need a new Control Unit or ecu on a 90 loyale]

On 6/4/2020 at 1:34 PM, rickyhils said:

Grounding for ECU should include both the mounting bracket under the driver dash AND the heavy wire eyelet [in the harness] that bolts onto the thermostat housing. Check those.  And, just curious, with ignition ON and engine OFF, how many blinks does the ECU show. Maybe six blinks that repeat?

Sorry I’ve been really busy lately.  There are no blinks     I also could not find the heavy eyelet on the wiring harness  

I did make sure the brakes are good and tight and test for ground just in the out side of the ecu 

[I need help finding out if I need a new Control Unit or ecu on a 90 loyale]

To the ecu?  So ether a ground or bad connection 

[I need help finding out if I need a new Control Unit or ecu on a 90 loyale]

That wasn’t it 

if I got a new Ecu would that fix the ignition pause

[Fusible links Questions]

Okay thank you 

[I need help finding out if I need a new Control Unit or ecu on a 90 loyale]

Okay thank you I’ll try tomorrow

if it’s not that any ideas on what it would be 

[I need help finding out if I need a new Control Unit or ecu on a 90 loyale]

I tested the corrent on each side of the links all reads about 12.8 to see if the current was making it threw and I also tested the amps and there all .30 of my thing is set right I’m pretty new on this stuff 

[Fusible links Questions]

Not sure if this feed is still active but is there any test I can do to test a fusible link and if so how do I do them 

I have a no start no spark 

[I need help finding out if I need a new Control Unit or ecu on a 90 loyale]

How do I test them just the amperage

[I need help finding out if I need a new Control Unit or ecu on a 90 loyale]

Thank you so much.  So this would also case it not to start 

[Can someone tell me where I can get a ignition transistor or is it possible to bye pass it. On a 90 Loyale]

I will double check but there is no blink 

[I need help finding out if I need a new Control Unit or ecu on a 90 loyale]

Alright 

it’s the only thing I could rhink I shorted something out beside the radio and ever senses it hasn’t started and something’s haven’t been work 

[I need help finding out if I need a new Control Unit or ecu on a 90 loyale]

I have a 1990 Subaru loyale with a no start no spark I’ve replaced ignition distributor made sure it is properly wired the only thing is the ignition pulse if I’ve done the test right with a test light.  there is no pulse.   There is also other random stuff that doesn’t work on the car , lights, dash light etc. I wondering if it is infact the ecu that isn’t working and if not other things it would be 

side note there is no check engine light or codes 

 

[Can someone tell me where I can get a ignition transistor or is it possible to bye pass it. On a 90 Loyale]

Sorry I haven’t been on here for awhile 

there is no pulse does this mean there something wrong with my ecu

there are no codes

[Can someone tell me where I can get a ignition transistor or is it possible to bye pass it. On a 90 Loyale]

I have the test light I’ll try that tomorrow 

it should pluses when cranking 

brand new coil 

[Can someone tell me where I can get a ignition transistor or is it possible to bye pass it. On a 90 Loyale]

Okay so it should spark if there voltage on there side of the ignition coil correct and what would cause it to not spark even though there reading 12 on both sides.  
 

there are other random stuff not working on the car I’m wondering could it be something with the ecu 

 

[Can someone tell me where I can get a ignition transistor or is it possible to bye pass it. On a 90 Loyale]

Positive on both sides of the ignition coil 

[Can someone tell me where I can get a ignition transistor or is it possible to bye pass it. On a 90 Loyale]

thnak you that’s how everything is set up and still nothing 

[Can someone tell me where I can get a ignition transistor or is it possible to bye pass it. On a 90 Loyale]

Is the yellow wire supposed to Read 12 or anything 

[Can someone tell me where I can get a ignition transistor or is it possible to bye pass it. On a 90 Loyale]

Yes it has two wires 

so what are you saying I should do 

[Can someone tell me where I can get a ignition transistor or is it possible to bye pass it. On a 90 Loyale]

So I guess I need to figure out what’s on the other side of the round connector