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Author Topic: Help 2009 MS3 250 Won't start  (Read 1309 times)

Starrjim13

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Help 2009 MS3 250 Won't start
« on: September 11, 2013, 01:15:30 AM »

Any help would be appreciated.  Recently bought a 2009 MS3 250 scooter with only 1400km for my wife to learn to ride. The bike has an intermittent starting problem and is currently dead.
The symptoms: when I turn the key on the FI Light DOES NOT come on and the fuel pump does not start. The fuel pump relay has been changed. Battery has a good charge and the engine will turn over.  All ground points seem good. The Tip Over Sensor may be faulty as it is always "open line" on continuity test. (the dealer says that does not matter and can be removed)  The dealer has not been able to offer much help.
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Hylife

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Re: Help 2009 MS3 250 Won't start
« Reply #1 on: September 12, 2013, 11:20:54 AM »

Start with that relay. Get your multimeter onto it and check that it is actually receiving power to the relay and that the relay is sending power to the pump.
Check ECU is seated correctly. Turn off key and CAREFULLY remove ECU from its socket. Spray socket and pins with Electrolube (dont use WD spray) and reconnect.
« Last Edit: September 12, 2013, 11:22:46 AM by Hylife »
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Cloud

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Re: Help 2009 MS3 250 Won't start
« Reply #2 on: September 16, 2013, 02:55:33 AM »

Can you bypass the whole circuit to check the fuel pump is working?

Once you know the pump itself is working, you can backtrack through the loom to find the broken bit. By backtrack, I mean do what Hylife said and go straight for the relay and ECU.
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