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FJR Motorcycle Forums
Technical & Mechanical Problems
Air flow sensor test
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<blockquote data-quote="HYCLE" data-source="post: 1120344" data-attributes="member: 4680"><p>Silent, with a digital multi meter you can measure the output of an intake manifold pressure sensor. On most engine management systems, they have three wires. Power, Ground and signal. The power side is usually reference voltage of 5 volts with the signal wire showing aprox. 5 volts with no vacuum and moving toward 1-2 volts at idle, depending upon altitude.The voltage drop on the ground side should be somewhere less than, point 2 volts.</p><p></p><p>With the wires connected and key on, backprobe the terminals and see what readings you get. If you can't find specs from Yamaha look at the test procedures for a MAP sensor on a car.</p><p></p><p>Check this website for testing procedures of many vehicle sensors.<a href="https://www.wellsve.com/ds_map.html" target="_blank">https://www.wellsve.com/ds_map.html</a></p></blockquote><p></p>
[QUOTE="HYCLE, post: 1120344, member: 4680"] Silent, with a digital multi meter you can measure the output of an intake manifold pressure sensor. On most engine management systems, they have three wires. Power, Ground and signal. The power side is usually reference voltage of 5 volts with the signal wire showing aprox. 5 volts with no vacuum and moving toward 1-2 volts at idle, depending upon altitude.The voltage drop on the ground side should be somewhere less than, point 2 volts. With the wires connected and key on, backprobe the terminals and see what readings you get. If you can't find specs from Yamaha look at the test procedures for a MAP sensor on a car. Check this website for testing procedures of many vehicle sensors.[URL="https://www.wellsve.com/ds_map.html"]https://www.wellsve.com/ds_map.html[/URL] [/QUOTE]
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FJR Motorcycle Forums
Technical & Mechanical Problems
Air flow sensor test
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