2002 GTX 4-Tec no display, one long beep????

[cchiapellone]

When trying to start the Seadoo I install the lanyard and get one long beep then nothing. I checked the fuses and found a 5A fuse blown. Replaced the fuse but still will not start, and no display. All the fuses are good and I cleaned and tried two different lanyards, still the long beep. Battery voltage is good and load tested the battery. The Manual said that it could be a Defective DESS post, or the EMS ECU is bad. Is their anything else I could check, bad oil sensor etc.?

Thanks in advance for any help. My kids are waiting to ride the Seadoo!

 

[aklim]

Starter Solenoid maybe?

 

[Rrm1387]

How are the battery terminals ! Are the cables still flexable ? Any signs of corrosion. I always start with the battery.you might not being getting a good ground. How old is the battery?

 

[linhster]

Just had the same problem with my 2003 GTX 4 TEC last weekend. Had starting problem after launch (had to hit the starter a few time). A few seconds after leaving the dock, the engine shut down and the ski flatline. I try to reinsert the DESS and get a long beep. After towing to shore, I discovered the ground post was loose. Tighten it up without any result. After coming home, I discovered that the bottom 5 amp fuse closest to the fuel tank was blown. Here were the things that I have tried without any results:

- Checked, clean and tighten all grounding points. And starter relay points.
- Checked all existing fuse and made sure they are not blown.
- Remove the MPEM and tried it on my wife ski. It work fine and started her ski.
- Replaced the 5 amp fuse and retest again and again with the fuse blowing every time. With a good fuse, the beep is immediate when I insert my DESS. With a blown fuse, it takes a few seconds before the long beep occurred.
- Disconnect the TOPS and fuel pump with no result. New fuse blown right away.
- Although the battery was fine, I topped it off with my battery tender (just making sure).
- Disconnected the A portion of the ECM and blown fuse and beep still occurred. Disconnect the B portion and no power anywhere.

At this point I think it's the ECM but not sure how to test it. I was told to try and swap out the ECM from my wife ski. I might give that a try but a little scare of it frying the working ECM.

 

[cchiapellone]

Well, I think we have the same problem, Thinking back it all started with a loose ground on the battery, but for me I changed the fuse and tighten the battery terminal and it worked for about 4 hours. But then later when I tried to start it the starter seemed to run slow but it would start. Later is stopped working all together.

I checked the bottom fuse again it was blown. This fuse is for the Start Stop and ECM module. The also tried to isolate the problem, but the fuse always blows.

I also tried to disconnect the starter solenoid, but this also had no power. so this was not a good test. I don't think it the starter solenoid because the fuse blows even before I push the start button.

I agree the next step is to replace the ECM unit, but that is taking a risk. I don't have a second ECM module so I will need to purchase a replacement. If you do take a chance with replacing the ECM module let me know if that fixed the problem. I won't be able to get a replacement for a couple of weeks. Just remember that you will need to use the lanyard that is programmed for the ECM.

Good luck, keep in touch

 

[cchiapellone]

Could the starter solenoid blow the 5 amp starter fuse/EMS without trying to start? The fuse blow as soon as I plug in the lanyard.

 

[cchiapellone]

My next step is to replace the EMS module. I have a 2002 4-Tec non-supercharged and found a use 2004 4-Tec supercharged EMC which comes with the MPEM and lanyard. The part no. is the same on the EMC MSE 3.7 R but the revision is newer 2002 # is 412.252.00/001 but the replacement 2004 # is 412.252.00/015. Using the lanyard which comes with the replacement EMC – will this work or will I need to take it to a dealer to have it reprogrammed or do I need to get the exact replacement, with the same revision?

Thanks

 

[fable]

I'm having a similiar issue with my 04. It used to turn on. THen it stopped and only lighted up the display, and now nothing completely.

My vts is shot, so i removed the fuse and charging the batter.

 

[linhster]

Maybe the tech guys can chime in about using the ECM from the SC (super charged) models? There are many more ECMs from the SC because of the ceramic washer problems in the super charger. What years share the ECM? I know that they share the same MPEM in 2003. Or is this a "premium area" question?

 

[linhster]

Wow, with the vast knowledge of all the users in this forum, I am shocked that no one reply yet.

 

[linhster]

Replaced the ECM with one from the same HP class (155hp) from a GTI. It started the ski but anything above 3000rpm was a problem. Gauges were flipping out. So tracked down the replacement ECU and now it's running like before. Hope this help someone else.

 

[Andrew_lbreman]

Everything I am hearing from you both is that you probably have a short or a positive that is corroded and not getting good contact. I would track down everything after that fuse and see where is goes. I am going to look at your schematics and Ill post back in a few. I dont think that your problem sounds like a bad computer. I am not saying it isnt that but, it sounds like a short to me. Also the starter solenoid shouldnt blow anything without it being actuated. Sometimes lines get corroded on any ski (fresh or salt use) and that can cause problems so I would check every bit of that wire.

 

[Andrew_lbreman]

Ok so after reading the manual a little bit, The one long beep is the MPEM (ECU) telling you that it is in shut down mode and either you have the lanyard on wrong, wrong dess key, switch not kicking over, no power to some portion of the ignition system. The beep is a safety that is activated in the unit. you need to find out why it is blowing the fuses.

 

[Andrew_lbreman]

Does the fuse blow before you press the start button or when you press it. It really sounds like some sort of a short to me and before I bought a new(used ecu)I would make sure that it is bad. I would think that if it went bad it wouldn't do anything. Also sometimes they may need to be unplugged and plugged back in because they have corrosion or a bad connection. Let me know what you come up with. Also if you havent done so visit

http://******************/download/pdf/service/manuals/2002/2002-seadoo-shop-manual-2.pdf

check p220 and 270 on for electrical troubleshooting.

 

[linhster]

Does the fuse blow before you press the start button or when you press it. It really sounds like some sort of a short to me and before I bought a new(used ecu)I would make sure that it is bad. I would think that if it went bad it wouldn't do anything. Also sometimes they may need to be unplugged and plugged back in because they have corrosion or a bad connection. Let me know what you come up with. Also if you havent done so visit

http://******************/download/pdf/service/manuals/2002/2002-seadoo-shop-manual-2.pdf

check p220 and 270 on for electrical troubleshooting.

Thanks Andrew for looking into the problems. I tested everything before trying my wife's ski ECM on my ski. The fuse stop blowing when the working ECM is installed. That's when I when looking for a replacement ECM w/dress. New unit in and it's running like before.

I really think that the loose terminal at the battery cause the short in the ECM. Low to high voltage frm the arcing amble the blame.

BTW, the link is not valid (to me at least).

 

[Andrew_lbreman]

Did you try your ecm on your wifes seadoo? That is how I test everything. I generally buy two of whatever I have one for me and one for the wife. I always also plug the "bad part" in the good unit and see if it works as suppose to. Then I plug the good part in the bad unit and check the same. Anyway sounds like you got it fixed. Good luck with it and I will always try to help out. Now if you ever have a problem with a motorcycle pm me and I can tell you whats what on them.

Andy

 

[seadooman55]

I just went throught the process of replacing my ECM in my 2002 GTX 4-tec...Everything worked fine except no spark..when i went to replace the ECM, the existing part number was replaced by a new one...super charged ECMs will NOT work..do an on board dignostics and see if your getting any Pcodes that might help point you in the right direction...if not, take it to the dealer and they will use a B.U.D.D.S tool to more accuratley identify whats wrong.

 

[tkazaz]

Hi guys,
I'm new with this forum.
Me and my brother have a 2003 GTX 4-tec supercharched and we had the SAME shitty problem today.. :-(
The 5A fuse is getting blown as we put the lanyard.
I have read this forum and other forums. It seems that many others have the exact same problem.
You recommended to replace the ECM. Others have replaced or fixed the MPEM (replaced a burnt diode - MR2535, http://www.seadooforum.com/showthread.php?18184-RFI-MPEM-5A-Fuse-blows-problem-found).
I am getting confused since there are 2 electrical parts:
1) "ECU" - http://www.ebay.com/itm/2005-Sea-Do...rts&hash=item519f01f863&vxp=mtr#ht_763wt_1037
2) "MPEM" - http://www.ebay.com/itm/Sea-Doo-GTX...rts&hash=item27c65132d1&vxp=mtr#ht_825wt_1037
Which one should I replace?

BTW - how can I find this ECU \ MPEM? just search it on eBay? There is a range of prices? how much should it cost?

 

[tkazaz]

Hi guys,
I have the same problem in my 2003 GTX 4-tec supercharged.
You and others sometimes refer to the ECU and sometimes to the MPEM.
I know 2 electrical boxes in my GTX:
http://www.ebay.com/itm/Sea-Doo-GTX...rts&hash=item27c65132d1&vxp=mtr#ht_825wt_1037
http://www.ebay.com/itm/Seadoo-ECU-...rts&hash=item2ebd55bbec&vxp=mtr#ht_500wt_1054

So which one I need to replace?
Do you know where can I find this box in a reasonable price? how much should it cost?

Thanks!

 

[tkazaz]

ECU vs MPEM.

Hi guys,
I have the same problem in my 2003 GTX 4-tec supercharged.
You and others sometimes refer to the ECU and sometimes to the MPEM.
I know 2 electrical boxes in my GTX: (2 pictures are also attached)
http://www.ebay.com/itm/Sea-Doo-GTX...rts&hash=item27c65132d1&vxp=mtr#ht_825wt_1037
http://www.ebay.com/itm/Seadoo-ECU-...rts&hash=item2ebd55bbec&vxp=mtr#ht_500wt_1054

So which one I need to replace?
Do you know where can I find this box in a reasonable price? how much should it cost?

Thanks!

 

[Kerrygarth]

Well, I think we have the same problem, Thinking back it all started with a loose ground on the battery, but for me I changed the fuse and tighten the battery terminal and it worked for about 4 hours. But then later when I tried to start it the starter seemed to run slow but it would start. Later is stopped working all together.

I checked the bottom fuse again it was blown. This fuse is for the Start Stop and ECM module. The also tried to isolate the problem, but the fuse always blows.

I also tried to disconnect the starter solenoid, but this also had no power. so this was not a good test. I don't think it the starter solenoid because the fuse blows even before I push the start button.

I agree the next step is to replace the ECM unit, but that is taking a risk. I don't have a second ECM module so I will need to purchase a replacement. If you do take a chance with replacing the ECM module let me know if that fixed the problem. I won't be able to get a replacement for a couple of weeks. Just remember that you will need to use the lanyard that is programmed for the ECM.

Good luck, keep in touch

2003 GTX 4-tec SC limited: I seem to be having a similar or same problem including the loose battery terminal...replaced DESS post but didn't help...replaced the 5 amp fuse, connected lanyard and got 2 beeps and display activated - hurrah! Removed lanyard ...then put it back on only to get one long beep and no display. What did you end up doing to correct this problem? Thanks.