Redbeard
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- Snowmobile
- 2012 Apex, 136 M20, PB80
2008 Vector, 136 M20, PB80
I've been reading LOTS of old posts about throttle position sensors, what they do and how to check them. After all the research, I now understand how to check TPS continuity, but I'm not 100% certain on setting/checking the proper output voltage of the sensor? I have a good idea, but I need someone to confirm my conclusion.
The shop manual talks about "Calculating the Specified Voltage!" As per manual description, I made my own 4.5 volt DC power source from a broken flashlight and connected it to a voltmeter. The manual then says to measure the voltage and multiply it by a factor of (.136) to obtain the "Specified Voltage". Then, watching the meter, adjust the TPS until you obtain the specified voltage.
Example:
My home made power source shows 4.9 volts on the meter. (4.9)x (.136) = .67 volts (specified voltage)
At throttle closed, my meter (set on 10 volt setting) shows the TPS at about .7 volts. Am I correct in how I've deciphered the shop manual? If so, I'd say I'm almost spot on! Is 3.5 volts at WOT correct or should that number be higher? Sled is an '04 Warrior.
The shop manual talks about "Calculating the Specified Voltage!" As per manual description, I made my own 4.5 volt DC power source from a broken flashlight and connected it to a voltmeter. The manual then says to measure the voltage and multiply it by a factor of (.136) to obtain the "Specified Voltage". Then, watching the meter, adjust the TPS until you obtain the specified voltage.
Example:
My home made power source shows 4.9 volts on the meter. (4.9)x (.136) = .67 volts (specified voltage)
At throttle closed, my meter (set on 10 volt setting) shows the TPS at about .7 volts. Am I correct in how I've deciphered the shop manual? If so, I'd say I'm almost spot on! Is 3.5 volts at WOT correct or should that number be higher? Sled is an '04 Warrior.
Last edited:
tedgoesfast
Expert
you should always inspect and test tps hooked in circuit.From my experience in dionostics on vechiles voltage being used is the best way.Build you jumper harness to backprob referance voltage and signal voltage in use to verify no drop outs when running.I have seen many tech get fooled by not doing this.
tedgoesfast
Expert
Also use dvom not old syle ohm meter
