Question about Treadmill Doctor Proform 525 Si Treadmill Rear Roller

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Where is the sensor for reading speed and mph

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The speed sensor is located on the frame next to the front roller pulley. It will be clamped to the frame on the left side of the treadmill under the motor cover.
The pulley has a small round magnet mounted to it. It may have come loose and attached itself to the metal frame of the treadmill. Check for the magnet, and position the speed sensor as close to the pulley as possible without making contact.
If the speed still doesn't work, replace the speed sensor.

Posted on Jan 03, 2011

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Posted on Jan 02, 2017

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02 Silverado 1500 speedo reads 100 mph


When does it read 100 mph ? sitting still , all the time etc.... ? The speedometer is controlled by a step motor inside the instrument cluster , step motor is controlled by a microprocessor inside instrument cluster , which get's the speed info from the PCM - engine computer over the vehicle class 2 serial data network . The VSS - vehicle speed sensor is a input to the PCM , this is what the PCM uses to calculate the vehicle speed .

Speedometer
The IPC displays the vehicle speed based on the vehicle speed signal from the PCM. The PCM converts the data from the vehicle speed sensor to a 4000 pulses/mile signal. The IPC uses the vehicle speed signal circuit from the PCM in order to calculate the vehicle speed. The speedometer defaults to 0 km/h (0 mph) if a malfunction in the vehicle speed signal circuit exists.

Having the vehicle hooked up to factory scan tool can take all the guess work out of a diagnoses like this .

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1 Answer

My 05 Focus speedometer is wacky. All other gauges and systems work fine. The speedometer needle doesn't go to zero when vehicle stops moving.


Sounds like the speedometer is faulty. If the speed sensor were the problem, the odometer would not work correctly, the transmission would not shift correctly, and the check engine light would be on.

Nov 28, 2015 | Cars & Trucks

1 Answer

Im trying to fix a p38 1999 wabcoD abs traction failure prpblem, live data for the abs sensors signal all round are the same and goes up and down with road speed.the wheel speed os&ns rear,up


Erratic signals come from the speed sensors(all that I found). At the sensors by the tires/CV axles. When I tear them apart (the bearings) they have fine metal around them. The causes the erratic signals. As you said, they seem normal at most points. But you have to watch and see where(the signal) they jump. Could be 2 MPH or 20 MPH. Replace that wheel bearing.

Oct 29, 2014 | Cars & Trucks

1 Answer

P0720 stratus codes


code p0720 refers to output shaft speed sensor(OSS)--circuit malfunction====causes--wiring--OSS sensor--ECM/TCM
of it has just happened check the wiring and connections to the transmission for water and corrosion or replace the OSS sensor in the transmission.

May 08, 2013 | 2002 Jeep Liberty

1 Answer

I have a 92 grand Marquis. It's reading 10 mph


change speed sensor on transmission.

Mar 24, 2013 | Cars & Trucks

1 Answer

Speeds up and slows down


Dear Sir:

Please adjust the sensor speed for the main motor. Of course I am recommending Very Strong to RUN the software calibration for easy diagnose and troubleshooting.

Otherwise see my personal TIPS, for diagnosee
Trouble.

sincerely. God bless you

ernesto cuadra
managua, nicaragua. c.a

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Nissan Maxima speedometer reads 20 mph but actual speed is 40-50 mph, is my transmission going bad?


NO, IT'S NOT THE TRANSMISSION! SOUNDS LIKE A SPEEDOMETER PROBLEM! THAT WOULD BE ONE OF THREE THINGS! EITHER THE SPEEDOMETER, THE CABLE, OR THE SPEED SENSOR! THE SPEED SENSOR WILL USUALLY GIVE YOU A P0500 CODE ON AN OBD-II CODE READER! THE SPEED SENSOR IS ELECTRONIC SPEED CONTROL LOCATED ON THE TRANSMISSION! SOME HAVE A SPEEDOMETER CABLE HOOKED TO THEM, AND SOME JUST HAVE A 2 WIRE PLUG THAT HOOKS TO IT!

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1998 Nissan maxima ABS light is on


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  1. Connect diagnostic read-out tool to SMEC connector, then disconnect the speed sensor connector and ensure there are no pushed out or damaged terminals. Repair damaged terminals, then proceed to Test 38.
  2. If there are no damaged terminals, set diagnostic read-out tool to ``Read Sensor Values,'' and select ``Vehicle Speed.'' Connect a jumper wire at between black/light blue and white/orange wires of speed sensor connector. While reading diagnostic read-out tool, make and break jumper wire. If display reads any speed above 0 mph, replace speed sensor, then proceed to Test 38.
  3. If display reads 0 mph, turn ignition switch Off and disconnect 60-way connector from SMEC. Ensure there are no pushed out or damaged terminals. Repair damaged terminals, then proceed to Test 38. If there are no damaged terminals, proceed to step 4.
  4. With sensor disconnected, connect ohmmeter between 60-way connector terminal No. 67 and ground. If ohmmeter shows continuity, proceed to step 6. If ohmmeter does not show continuity, move meter lead from ground to white/orange wire of speed sensor connector.
  5. If ohmmeter indicates continuity, proceed to step 7. If ohmmeter does not indicate continuity, repair white/orange wire of 60-way connector for open circuit, then proceed to Test 38.
  6. Disconnect bulk head connector to instrument panel. If ohmmeter still indicates continuity, repair white/orange wire for a short to ground in harness, then proceed to Test 38. If ohmmeter does not indicate continuity, repair white/orange wire for a short to ground in instrument cluster area.
  7. Disconnect ohmmeter leads and connect ohmmeter between 60-way connector terminal No. 4 and sensor connector black/light blue wire. If ohmmeter does not indicate continuity, proceed to step 8. If ohmmeter indicates continuity, replace SMEC, then proceed to Test 38.
  8. If ohmmeter did not indicate continuity, repair black/light blue wire of speed sensor harness for an open circuit, then proceed to Test 38.




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Sep 24, 2009 | 2002 Nissan Maxima

1 Answer

I have 1998 dodge ram my abs and brake light came on


IIRC, the speedo reads off of the sensor in the center section of the rearend. Also controls ABS. Hope this helps!

Dec 24, 2008 | 1998 Dodge Ram 1500 4WD

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