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96 xp dess problem

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Tmac

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Alright people new problem. I have a 1996 xp. The dess key when installed seems to work fine sometimes. It will always let the jet ski crank. The thing is that it does not always beep the way it should. I also notice that when you pull it off when ski is running it does not kill ski. Wondering if it could just be a bad dess post. Already checked all connections,fuses,and cleaned all contacts. Any help would be appreciated.
 
Dess key gives 2 beeps on intial contact. Then no more. It will also let ski crank when removed. Will not kill engine when removed. What do you think bad post or what?
 
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i would say bad post or mpem. Those are the only two things that i would think it could be. You can get in there with a meter and test the dess with lanyard on/off/running/no runnig/etc. and compare to what manual/wiring diagram says
 

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Here is information on your dess post and lanyard:

Advanced Self- Diagnostic Mode


By pushing the start/stop button 5 times, you’re putting the DESS in advanced diagnostics. When you have successfully done this, you'll hear 1 short, 1 long beep then, put on the lanyard cap. The engines should start if everything is ok.

2 Short beeps means MPEM can’t read the lanyard cap or it has bad magnet. It could be a bad wire connection at the Lanyard switch.
2 Long beeps means wrong lanyard or bad connection of DESS connection
3 beeps signal the wiring harness of the DESS switch are grounded, or a short circuit somewhere.

You may have a bad connection in your wiring harness, from corrosion. Go through your electrical systems connectors and check for corrosion. Clean them with some contact cleaner, then die-electric grease.

To listen to the codes again start from the beginning.


DESS System/Safety switch post/ lanyard

Engine start/stop switch verification;
Disconnect the Yellow/Red wire of the start/stop switch. Using an ohmmeter, connect test probes to the Yellow/Red wire and to ground. Measure resistance, it must be an open circuit (switch is normally open). Depress and hold switch, the ohmmeter should read close to “0” ohm.

Safety Lanyard Switch Verification;
If 2 short beeps are not heard when installing the safety lanyard, disconnect the switch wires.
Safety lanyard removed;
connect the test probes to switch Black and Black/Yellow wires. It’s an open circuit, there should be no continuity.
Connect one test probe to the White/Gray wire and the other test probe to the switch terminal. Measure resistance, it should be “0” ohm. Connect one test probe to the Black wire and the other test probe to the switch ring. Measure resistance, it must be close to “0” ohm.
Safety lanyard on switch; connect the probes to switch Black and Black /Yellow wires. Measure resistance, it must be “0” ohm.
Timer Verification;
The timer is integrated into the MPEM. Always confirm that the fuses are in good condition. To confirm operation of timer, remove the safety lanyard from switch. After 5 seconds delay, depress start/stop button once. The timer should stay on for 33 seconds (for example, the gauge(s) will be activated) and than turn off.


Let us know how you make out.

Karl
 
Thanks alot I'll get back when I find problem. Last summer it was the spx with problems, and the xp was MR.reliable, this summer just the opposite. Tmac
 
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