1996 Geo Tracker LSI Blowing FI fuse and now won't start. - Suzuki Forums: Suzuki Forum Site
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Old 05-18-2015, 09:22 PM   #1 (permalink)
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Default 1996 Geo Tracker LSI Blowing FI fuse and now won't start.

Man it never stops. Drove my tracker to a friends house today and after leaving it running in his driveway for a min it stopped. I tried to restart it and it it wouldn't turn over. Turns out the FI fuse blew. I replaced it and it blew immediately. My buddy helped me diagnose ( Very accomished mechanic) and we had no spark whatsoever. We pulled the main relay which was warm. I believe we discovered that the injector wire harness has a short but I think that means that the ECU is toast. Below is the relay we pulled that stopped the fuses from popping.

So just to recap, FI Fuse pops immediately, doesn't start at all, no spark, we narrowed it down to injector harness. And yes any advice.



Any advice?

Last edited by umiami80; 05-18-2015 at 09:31 PM.
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Old 05-19-2015, 06:22 AM   #2 (permalink)
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The F1 circuit runs along the blue/black wire. Some info in post #4 here may help you:
https://www.suzuki-forums.com/suzuki-...-key-turn.html
With this fuse blown, you will not have spark, as the main relay is circuited to the ECU, which controls spark. The injector harness is governed by the red and yellow wire, directly from the ECU, by the way.
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Old 05-19-2015, 07:56 AM   #3 (permalink)
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Thank you, I will follow up short. How do I get a 1995 LSI 16V automatic ECU if I toasted if?


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Old 05-19-2015, 02:21 PM   #4 (permalink)
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Probably with some difficulty, frankly. For some reason, even the gusy on ebay who do the core returns are not handling the 95 ECU's for some reason. However, if you pull the ECU, you should be able to see if anything is fried or leaking in it - presumably you have already changed the caps in your ECU?? Many of the components, caps, drivers, etc., can be individually replaced - if there is damage on your board, upload a photo of it, and Rhino can probably help you with it. However, there is no reason (yet) to assume the ECU is 'fried'. You need to find your short. While it is unlikely that the main relay has anything to do with your problem, you can try to plug the fuel pump relay (the green one next to the main relay) into the main relay socket - they are interchangeable. Presumably the f1 fuse will continue to blow at key on, though. You need to follow the wiring - there have been many threads on the forum about this problem, if you search for them.
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Old 05-19-2015, 02:34 PM   #5 (permalink)
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This should be a nice diagram to follow. Not sure if it's on here somewhere already ?
All credit to this "J.Benoit" chap for this.

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Old 05-19-2015, 03:00 PM   #6 (permalink)
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That is one excellent diagram.....
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Old 05-19-2015, 04:36 PM   #7 (permalink)
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Quote:
Originally Posted by Bex View Post
That is one excellent diagram.....
X2. Good job Dudley.
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Old 05-19-2015, 05:18 PM   #8 (permalink)
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Not sure where I found this as I've had it for some time, all I did was join the two pages to make one diagram and turn it 90 degrees.
I've just has a look though some files and J benoit "aka Warbird" is the chap who did a really detailed write-up on converting a Samurai wiring loom to fit a 16v sidekick/vitara engine.
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Old 05-19-2015, 05:39 PM   #9 (permalink)
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Out comes the "NON DESTRUCTIVE TONE GENERATOR" and connect to the system side of the burned fuse.. follow the tone, no need to panic and open harness...

... Philip
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Old 05-20-2015, 05:40 AM   #10 (permalink)
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Quote:
Originally Posted by aquanaut20 View Post
Out comes the "NON DESTRUCTIVE TONE GENERATOR" and connect to the system side of the burned fuse.. follow the tone, no need to panic and open harness...

... Philip
x2. This is certainly the easy way to do it.

Regarding J Benoit, I have found 3 of his ECU diagrams on the internet, one for OBD1 TBI, OBD1 MPI and OBD2. I'll upload them to a new thread - maybe it would be a good idea to make them into a sticky. Kudos to this guy, whoever he is - they are truly incredibly excellent....
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