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FJR Motorcycle Forums
Technical & Mechanical Problems
2006 died on freeway on way home from trip
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<blockquote data-quote="slatonp4" data-source="post: 1414132" data-attributes="member: 88581"><p>Okay, I'm back. I can hear the groans.</p><p></p><p>Have a good friend who is a magician with wiring. He came over today to see if he could help me make some sense of this and we have both conceded that it is probably the ECU. Wanted to run this by you all to see if there was anything else I might need to look at before taking that plunge. Not absolutely certain it is the ECU, but can't find anything else that makes sense.</p><p></p><p>I replaced the multi-function relay up front and it seems to be giving the same results as the old one. What is making us think it is the ECU is that there is a ground that is supposed to be happening that runs through it that isn't happening.</p><p></p><p>On the relay, the red wire to the red/blue wire is supposed to be a normally open circuit. It is. When the ignition is turned on, the relay closes the circuit like it is supposed to, but only giving .041V to the red/blue wire. 12V to the red wire, but not the red/blue when the ignition is on. No voltage to either when ignition is off.</p><p></p><p>It looks like according to the wiring diagram, that there is a coil inside the relay that is supposed to energize the fuel pump when ignition is turned on, but it isn't. I ;have the 12V to the coil, but the ground that would operate it seems to run through the ECU and it's not happening. The blue/yellow wire that runs from the out side of the coil/relay to the ECU has continuity. When cheking the blue/yellow wire for ground, it registers 76 ohms of resistance, but we can run a jumper ground to the blue/yellow wire and the relay operates as intended giving the red/blue wire 12V.</p></blockquote><p></p>
[QUOTE="slatonp4, post: 1414132, member: 88581"] Okay, I'm back. I can hear the groans. Have a good friend who is a magician with wiring. He came over today to see if he could help me make some sense of this and we have both conceded that it is probably the ECU. Wanted to run this by you all to see if there was anything else I might need to look at before taking that plunge. Not absolutely certain it is the ECU, but can't find anything else that makes sense. I replaced the multi-function relay up front and it seems to be giving the same results as the old one. What is making us think it is the ECU is that there is a ground that is supposed to be happening that runs through it that isn't happening. On the relay, the red wire to the red/blue wire is supposed to be a normally open circuit. It is. When the ignition is turned on, the relay closes the circuit like it is supposed to, but only giving .041V to the red/blue wire. 12V to the red wire, but not the red/blue when the ignition is on. No voltage to either when ignition is off. It looks like according to the wiring diagram, that there is a coil inside the relay that is supposed to energize the fuel pump when ignition is turned on, but it isn't. I ;have the 12V to the coil, but the ground that would operate it seems to run through the ECU and it's not happening. The blue/yellow wire that runs from the out side of the coil/relay to the ECU has continuity. When cheking the blue/yellow wire for ground, it registers 76 ohms of resistance, but we can run a jumper ground to the blue/yellow wire and the relay operates as intended giving the red/blue wire 12V. [/QUOTE]
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FJR Motorcycle Forums
Technical & Mechanical Problems
2006 died on freeway on way home from trip
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