Update: My bike has been investigated by a Tech in my local Yamaha dealer. He has not been able to find the root cause of the fault, but he has spent time explaining to me what he has done, and to be fair, because they couldn't fix it, I was charged for 1 1/2 hors labour instead of the 2 1/2hours that he spent on it. When he road tested(after investigating) he did have the fault and the Dealership suggested that I might want to carry on looking into it myself rather than have to pay them for (an unknown) number of hours labour for them to carry on trying to fix it.
1) He has measured the resistance of the three wires into the sensor and they are ok.
2) The Error Code 13 is fagging and is immediately becoming an historical code-if it wasn't(if it was a permanent error) it would show in the instrument pack(Clock/meter) when starting the bike.
3) He thinks that the root cause might not be the air pressure sensor, but diagnostically the bike is thinking that it is what the fault (a bit like a faulty starter motor showing up as a missing crank position sensor[CPS] signal because the bike detects the start switch signal but can't detect the CPS signal because the engine isn't being turned by the [faulty] starter motor).
4) He couldn't measure the output voltage from the air pressure sensor(they haven't got the Yamaha tool(which I think is a link lead so that a multi meter can be put in series with the sensor and harness).
5) I think he said that the Reference Voltage is ok. Would that be L1(see attached circuit diagram)?
6) He has contacted Yamaha Technical for help buy they couldn't advise what it could be
I have attached a snap shot of the circuits.
At the moment I am thinking that maybe there is an intermittent voltage spike on the B/L circuit into the sensor, only occurring while riding, that is causing this problem? Does anybody know if an intermittent voltage spike from one of the other sensors spliced into the B/L circuit for the senor would be held as an historical error code?
1) He has measured the resistance of the three wires into the sensor and they are ok.
2) The Error Code 13 is fagging and is immediately becoming an historical code-if it wasn't(if it was a permanent error) it would show in the instrument pack(Clock/meter) when starting the bike.
3) He thinks that the root cause might not be the air pressure sensor, but diagnostically the bike is thinking that it is what the fault (a bit like a faulty starter motor showing up as a missing crank position sensor[CPS] signal because the bike detects the start switch signal but can't detect the CPS signal because the engine isn't being turned by the [faulty] starter motor).
4) He couldn't measure the output voltage from the air pressure sensor(they haven't got the Yamaha tool(which I think is a link lead so that a multi meter can be put in series with the sensor and harness).
5) I think he said that the Reference Voltage is ok. Would that be L1(see attached circuit diagram)?
6) He has contacted Yamaha Technical for help buy they couldn't advise what it could be
I have attached a snap shot of the circuits.
At the moment I am thinking that maybe there is an intermittent voltage spike on the B/L circuit into the sensor, only occurring while riding, that is causing this problem? Does anybody know if an intermittent voltage spike from one of the other sensors spliced into the B/L circuit for the senor would be held as an historical error code?
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