| Author |
Message |
    
J2blue
| | Posted on Wednesday, September 10, 2008 - 06:18 pm: | 
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This problem is tough to summarize. I went to start the bike(03 XB9S) after it had not been run for two days. The starter turns the engine but it doesn't sound like it is getting any spark...then the fan comes on as though the bike was hot! The battery quickly started to drain when rolling the starter so I quit that and turned the key off. The fan continued to run and I finally had to pull a fuse to stop it. I guessed which fuse and got lucky, it was the right side 7.5amp fuse.
I searched the KV here last night to find out where and what sensor controls the fan and it seems to be the rear cylinder temperature sensor. Today I began removing the air-box cover and the air-box to begin inspecting. It was easy to identify the wire for the sensor but not easy to see how to remove or replace it. I took the battery from my Blast to see if the other battery was just to low for the electrical system to function correctly but got the same result. Just trying to visually inspect the wiring doesn't reveal any problems that I can see.
I'm not sure what troubleshooting steps to take next. Any ideas? I'd rather not take it to a dealer yet. Is there a way to read any diagnostic codes? Is it possible to remove the sensor and fan circuit from the ignition control loop without causing a problem?
Note that the bike ran fine with no symptoms on Sunday. |
Bombardier
| | Posted on Friday, September 12, 2008 - 02:17 am: |
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13mm socket cut down the side to allow the cable to fit.
Use a quarter inch drive to allow enough room to seat the socket properly after moving the alloy engine support that attaches to the frame and the engine.
You need this sensor as it controls both fuel and ignition advance.
Be very gentle with the cable when replacing it as rough treatment will change the values it sends to the ecu and you will be back to square one. |
J2blue
| | Posted on Friday, September 12, 2008 - 02:01 pm: |
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Thanks Jason, that is some very helpful info. Until I get a service manual I'm reluctant to dig into the bike much more. I put the air-box back on last night. I still have my Blast to get around on thankfully! I may go out and buy a cheap 13mm socket today and find someone who can modify it. |
Bombardier
| | Posted on Friday, September 12, 2008 - 08:36 pm: |
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Put in a vise very tightly and cut down the side with an angle grinder.
Make sure you have eye protection on whilst doing this as the chrome and hardened steel of the socket is not very forgiving on the eyes. |
J2blue
| | Posted on Wednesday, September 17, 2008 - 09:52 pm: |
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It is running again!
Here are the things I did today that seemed to make a difference.
1) Removed rear spark plug to check for spark; found it did not spark.
2) Noticed the front cylinder did spark and the engine ran on it!
3) Reseated all fuses and relays.
4) Put in a spare plug and torqued to spec.
Both cylinders fire, hooray! I'm not sure that a bad plug would explain the fan running when the engine was cold, but hey. |
Troubleshooting (Poor Starting/Running/Handling/Ride Issues) »
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03 XB9S not starting, fan runs regardless of temp