Input speed sensor replacement

Tiny
JOHN.COUTURE
  • MEMBER
  • 2005 MAZDA 3
  • 2.0L
  • 4 CYL
  • 150,000 MILES
Need to know the location of the input speed sensor on the transmission.
Thursday, April 18th, 2019 AT 2:45 PM

6 Replies

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Good afternoon,

They call it a turbine shaft speed sensor. Check out the images (Below). Please let us know if you need anything else to get the problem fixed.
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Thursday, April 18th, 2019 AT 3:19 PM
Tiny
JOHN.COUTURE
  • MEMBER
  • 4 POSTS
Input sensor on a transmission, transmission won't shift into high gear.
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Thursday, April 18th, 2019 AT 5:02 PM
Tiny
JOHN.COUTURE
  • MEMBER
  • 4 POSTS
I researched this found it could be the problem.
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Thursday, April 18th, 2019 AT 5:03 PM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Again, do you have a code?

If the input speed sensor was the issue it would not shift as that signal is critical for shifting. The location is in the diagrams below.

If you have an advanced scan tool you can monitor the sensor readings.

Roy

NPUT/TURBINE SPEED SENSOR REMOVAL/INSTALLATION
1. Remove the battery duct and battery cover.
2. Disconnect the negative battery cable.
3. Remove the battery, battery box and battery tray.

4. Disconnect the input/turbine speed sensor connector.
5. Remove the input/turbine speed sensor.
6. Apply ATF to a new O-ring and install it on a new input/turbine speed sensor.
7. Install the input/turbine speed sensor.
Tightening torque 8 - 11 Nm (82 - 112 kgf-cm, 71 - 97 inch lbs.)
8. Connect the input/turbine speed sensor connector.
9. Install the battery, battery box and battery tray.
10. Connect the negative battery cable.
11. Install the battery duct and battery cover.

Testing

INPUT/TURBINE SPEED SENSOR INSPECTION

Caution: Water or foreign material entering the connector can cause a poor connection or corrosion. Be sure not to drop water or foreign material on the connector when disconnecting it.

1. Remove the battery duct and battery cover.
2. Disconnect the negative battery cable.
3. Remove the battery, battery box and battery tray.
4. Disconnect the input/turbine speed sensor connector.
5. Measure the resistance between the input/turbine speed sensor terminals. If there is any malfunction, replace the input/ turbine speed sensor.
Resistance 250 - 600 ohms (ATF temperature: 40 - 160°C (-40 - 320°F))
6. Connect the input/turbine speed sensor connector.
7. Install the battery, battery box and battery tray.
8. Connect the negative battery cable.
9. Install the battery duct and battery cover.

Check out the diagrams (Below). Please let us know if you need anything else to get the problem fixed.
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Thursday, April 18th, 2019 AT 5:10 PM
Tiny
JOHN.COUTURE
  • MEMBER
  • 4 POSTS
Seems to be helpful, but I never heard it called a turbine speed sensor before, thank you so I'll try I'll try this.
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Friday, April 19th, 2019 AT 7:16 PM
Tiny
ASEMASTER6371
  • MECHANIC
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You are welcome.

Always glad to help.

Roy
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Saturday, April 20th, 2019 AT 4:24 AM

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