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FJR Motorcycle Forums
Technical & Mechanical Problems
Throttle position sensor
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<blockquote data-quote="ionbeam" data-source="post: 39138" data-attributes="member: 277"><p>Most of the TPS test procedure is from the shop manual, the balance is from life 101. The specifications are straight from the manual. I've been there, done that and I hope to have clarified the procedure from the Factory Service Manual procedure a bit. The FSM doesn't say to <strong><em>watch the diAG screen for irregular readings while slowly opening the throttle</em></strong>. I have enough experience with pot 'n wiper fed Analog to Digital converters to know to check the full range.</p><p></p><p>The TPS test should take you way less than 30 minutes including a cigarette and coffee break :lol: </p><p></p><p>Alan</p><p></p><p>*Pot 'n wiper: The ECU feeds a potentiometer a fixed reference voltage, the wiper moves along the length of the resistor as the throttle moves, this causes the wiper voltage to change with throttle position. The analog (varying) voltage gets converted to digital (on/off; 0/1) to be digestible by the ECU.</p></blockquote><p></p>
[QUOTE="ionbeam, post: 39138, member: 277"] Most of the TPS test procedure is from the shop manual, the balance is from life 101. The specifications are straight from the manual. I've been there, done that and I hope to have clarified the procedure from the Factory Service Manual procedure a bit. The FSM doesn't say to [B][I]watch the diAG screen for irregular readings while slowly opening the throttle[/I][/B]. I have enough experience with pot 'n wiper fed Analog to Digital converters to know to check the full range. The TPS test should take you way less than 30 minutes including a cigarette and coffee break :lol: Alan *Pot 'n wiper: The ECU feeds a potentiometer a fixed reference voltage, the wiper moves along the length of the resistor as the throttle moves, this causes the wiper voltage to change with throttle position. The analog (varying) voltage gets converted to digital (on/off; 0/1) to be digestible by the ECU. [/QUOTE]
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FJR Motorcycle Forums
Technical & Mechanical Problems
Throttle position sensor
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