Pantera EFI problems - Snowmobile Forum: Your #1 Snowmobile Forum

jKsled · 11-29-2011, 11:35 AM

hey guys,
this is on pops machine, the pantera is acting up. ('97 580 efi) When I was home last weekend, he had it in the garage for some pre-season maintenance. when he went to take it back outside, the fuel pump wouldn't kick in, and the EFI computer was flashing 2 long 2 short, 2-2. I had to leave, but I told him to check over all the basics, he emailed me today and said everything checked out. but now the code has changed too, heres the text from his email

It's now: long, long, short

One time it did this: long long short (pause) long long short short (pause) long long short

The next time it was: long long short

Go figure.

anybody have any ideas? I won't be able to check it out till friday when I am back home. But I can forward him any tips. I couldn't seem to find the codes for this machine's efi system online. but I haven't really had much time to look this week either.

**RJ Gleason** · 11-29-2011, 01:43 PM

21 would be short or break in the mag side injector circuit. Check the connections to the injectors.

jKsled · 11-29-2011, 01:56 PM

alright. would that cause the machine not to go through its pre-start cycle? with priming the fuel pump?

Forgot to add, how would I bypass key switch and kill switch on this, just to double check them? I know how on my poo efi, but never done it on the AC.

**kccats** · 11-29-2011, 03:00 PM

There should be a 3 wire flat connector, with 2 yellow and a brown I believe? Just unplug it! Hey did he unplug any of the connectors around the throtle bodies? Oh and by the way Great ride!

jKsled · 11-29-2011, 04:49 PM

Not that i'm aware of. i'll also have him try the bypass.
and agreed its a great riding sled for the family!

Blaine1 · 11-29-2011, 06:12 PM

Here are the codes that the ecu can output:

1 flash = Open or short circuit in TPS
2 flashes = Open or short circuit in water temp sensor
3 flashes = Open or short circuit in intake air temp sensor
4 flashes = Open or short circuit in barometric pressure sensor
5 flashes = Injector failure

**kccats** · 11-30-2011, 09:27 AM

I thought is was Long / short?

**RJ Gleason** · 11-30-2011, 11:19 AM

1-1 is the left injector, 2-1 is the right one.

jKsled · 12-03-2011, 07:27 PM

Ok guys, need some more help with this one. Not very experienced with this EFI system.

The code is blinking a 2-1 code. So, since this is supposed to be the mag injector, I checked it over. both injectors ohm @ 5 ohms, both click on and off when voltage applied with 5v battery, and both injector leads read 8.2V with power on. So I am quite confused, as everything seems to be checking out.

The fuel pump does not prime the system when the key is turned over. I am attaching two pics of the wires coming out of stator. which wires are for what on this sled? I did not know which one was the 3 prong connection (referenced to above) for bypassing the key/kill switch.

It did throw out a 2-2 code a few times too, in addition to the 2-1 code. Not sure whats going on with that.

It did run recently. My dad said when he first turned the key, he didn't hear the fuel pump come on. so he hit the gas tank a few times i guess, and it must have shook something because then it worked. However it is obviously not working now. So what should I check next? How would I diagnose this and get it going? Which wires lead to the fuel pump so i can test that?

**kccats** · 12-03-2011, 09:09 PM

Have you checked the fuse? Fuel pump relay? Removed the fuel pump?

jKsled · 12-03-2011, 10:14 PM

yes fuse is good. Ok, heres what i just did. its getting confusing to me

The fuel pump connection (see picture) The red line gets a constant 12v, on and off. fuel pump never turns on however. When I disconnect it and jump the fuel pump (red to 12v and black to ground) it runs. The black wire on the other side of the connection turns into two brownish wires. These I assume are ground. However, they never show any continuity, with key on or off.

I assume it is a switched ground for the fuel pump and injectors, as they are on the same circuit it seems like. could the switch/relay be bad? but my problem is where is the relay for them? Right in front of the gas tank? right now the tank is still on, do i need to take it off to get to it? can't see in there right now

**kccats** · 12-04-2011, 07:27 AM

Yes it does sound like the fuel pump relay!

jKsled · 12-04-2011, 09:06 AM

where is the relay located? I can see one relay in front of the bulkhead/firewall, but that ones for the lights. can't seem to see any other ones!

jKsled · 12-04-2011, 07:38 PM

anyone know where the relay is located? can't seem to find it!

**kccats** · 12-04-2011, 08:38 PM

There is a head light relay?

jKsled · 12-04-2011, 11:40 PM

ya that one seems to work fine! However I need to find the fuel pump relay, I've been looking online and can't seem to find anything, even the microfiche doesn't have its location shown at all

**kccats** · 12-05-2011, 05:26 AM

Hmm ok, well I have a 95 and an 03 and 04 and I belive the 95 is right behind the ECU unit itself!

jKsled · 12-05-2011, 08:27 AM

hmm. Is it the bosch type relay? the 4 prong one?

93Wildcat700 · 12-05-2011, 10:17 AM

Usually yes. I count find it in the Microfiche either Bro thats why i didnt comment on it. Maybe built into the ECU itself?? IF you cannot see it strapped to the ECU it should be fairly obvious.

If not maybe its inside. Can you follow the wires BACK from the injectors to the ECU. that will tell you where they go. Follow the colors from the injector backwards to the ECU

**RJ Gleason** · 12-05-2011, 12:17 PM

Fiche does not show a separate relay for the fuel pump.
One relay for both functions apparently.