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FJR Motorcycle Forums
Technical & Mechanical Problems
Infamous Code 19 trouble
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<blockquote data-quote="Constant Mesh" data-source="post: 1464052" data-attributes="member: 615"><p>You can check the side stand switch circuit by disconnecting the clutch switch two wire connector at the handlebar.</p><p></p><p>The blue/yellow wire will be grounded when the side stand is up and be an open circuit when down.</p><p></p><p>Make sure you're not in neutral when checking the side stand switch. The neutral switch can also ground this circuit.</p><p></p><p>There's a diode in series with the side stand switch which could be bad but not likely.</p><p></p><p>Once you've proven the side stand switch is good your problem is likely the ignition switch as discussed earlier. The ignition switch is two switches in one. One switch supplies power to almost everything. The other switch just closes and forwards a "ground" from the side stand switch and/or neutral switch to the computer. If the computer doesn't sense "ground" on that input the engine won't run.</p><p></p><p>Assuming the side stand switch and diode are good you're likely seeing "Off" and "Off" on Code 21 because the ignition switch is blocking/interrupting the signal to the computer.</p><p></p><p>If the ignition switch is good the engine should run when in neutral since the computer would be sensing "ground" from the neutral switch. However it would stop when shifting into gear unless the side stand was up and grounded.</p></blockquote><p></p>
[QUOTE="Constant Mesh, post: 1464052, member: 615"] You can check the side stand switch circuit by disconnecting the clutch switch two wire connector at the handlebar. The blue/yellow wire will be grounded when the side stand is up and be an open circuit when down. Make sure you're not in neutral when checking the side stand switch. The neutral switch can also ground this circuit. There's a diode in series with the side stand switch which could be bad but not likely. Once you've proven the side stand switch is good your problem is likely the ignition switch as discussed earlier. The ignition switch is two switches in one. One switch supplies power to almost everything. The other switch just closes and forwards a "ground" from the side stand switch and/or neutral switch to the computer. If the computer doesn't sense "ground" on that input the engine won't run. Assuming the side stand switch and diode are good you're likely seeing "Off" and "Off" on Code 21 because the ignition switch is blocking/interrupting the signal to the computer. If the ignition switch is good the engine should run when in neutral since the computer would be sensing "ground" from the neutral switch. However it would stop when shifting into gear unless the side stand was up and grounded. [/QUOTE]
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FJR Motorcycle Forums
Technical & Mechanical Problems
Infamous Code 19 trouble
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