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FJR Motorcycle Forums
Technical & Mechanical Problems
Clock Resetting/changing time
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<blockquote data-quote="Fred W" data-source="post: 1359805" data-attributes="member: 3828"><p>The power that goes to the instrument panel for the clock doesn't go through the ignition switch. I don't see how key switching the bike on would reset the clock.</p><p></p><p>Backup Power to the clock, trip odometer, and windshield drive mechanism comes from the battery <em>at all times</em> via the "Main" fuse, and the "Backup" fuse. And if the backup fuse were blown for some reason none of these things would work at all since there is no alternate power path when the key is switched on.</p><p></p><p>It is a very common symptom of a battery on its way out that you get clock and trip odometer resets when starting the bike. This happens because the starter loads the battery voltage down too low during starting. Counter-intuitively this symptom seems to first appear during hot starts (not cold ones) for some reason never fully determined. It may continue to start the bike with the resetting electronics for some time until the battery is no longer able to turn the bike over fast enough, or the voltage drops too low for the fuel injection to work.</p><p></p><p>In any case, I'd be looking at replacing the battery for the reset symptom 1st.</p><p></p><p>edit - Unless... this is some sort of symptom of a bad ground path for the instrument panel? Another spider sutuation we hadn't heard of before?</p></blockquote><p></p>
[QUOTE="Fred W, post: 1359805, member: 3828"] The power that goes to the instrument panel for the clock doesn't go through the ignition switch. I don't see how key switching the bike on would reset the clock. Backup Power to the clock, trip odometer, and windshield drive mechanism comes from the battery [I]at all times[/I] via the "Main" fuse, and the "Backup" fuse. And if the backup fuse were blown for some reason none of these things would work at all since there is no alternate power path when the key is switched on. It is a very common symptom of a battery on its way out that you get clock and trip odometer resets when starting the bike. This happens because the starter loads the battery voltage down too low during starting. Counter-intuitively this symptom seems to first appear during hot starts (not cold ones) for some reason never fully determined. It may continue to start the bike with the resetting electronics for some time until the battery is no longer able to turn the bike over fast enough, or the voltage drops too low for the fuel injection to work. In any case, I'd be looking at replacing the battery for the reset symptom 1st. edit - Unless... this is some sort of symptom of a bad ground path for the instrument panel? Another spider sutuation we hadn't heard of before? [/QUOTE]
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FJR Motorcycle Forums
Technical & Mechanical Problems
Clock Resetting/changing time
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