Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2011 Mazda 3 L4-2.5LFACTORY OEM SERVICE PROCEDURE
Transmission Position Sensor/Switch: Service and Repair
TRANSAXLE RANGE (TR) SWITCH REMOVAL/INSTALLATION [FS5A-EL]
CAUTION:
- Water or foreign objects entering the connector can cause a poor connection or corrosion. Be sure not to drop water or foreign objects on the connector when disconnecting it.
1. Engage the parking brake and use wheel chocks at the front and rear of the wheels.
2. Shift the selector lever to the N position.
3. Perform the following procedures.
a. Remove the battery cover. Removal and Replacement
b. Disconnect the negative battery cable.
c. Remove the air cleaner component. Service and Repair
4. Remove in the order indicated in the table.
5. Install in the reverse order of removal.
6. Inspect the TR switch. Testing and Inspection
Manual Shaft Nut Removal Note
1. Set the adjustable wrench as shown to hold the manual shaft lever and loosen the manual shaft nut.
CAUTION:
- Do not use an impact wrench. Hold the manual shaft lever when removing the manual shaft nut, or the transaxle may be damaged.
TR switch Installation Note
1. Verify that the manual shaft is aligned with the N position.
2. Adjust the TR switch between terminals B and C until the resistance becomes specification.
TR switch specification
- 713-787 ohms
3. Tighten the TR switch installation bolts.
Tightening torque
- 8-11 Nm {82-112 kgf-cm, 71-97 in-lbf}
Manual Shaft Nut Installation Note
1. Set the adjustable wrench as shown to hold the manual shaft lever and tighten the manual shaft nut.
CAUTION:
- Do not use an impact wrench. Hold the manual shaft lever when installing the manual shaft nut, or the transaxle may be damaged
Tightening torque
- 32-46 Nm {3.3-4.6 kgf-m, 24-33 ft-lbf}
Factory Service Tools
Use the Manual With the Right Hardware
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- β’ You smell fuel, burning insulation, or see smoke.
- β’ Brakes feel soft, pull hard to one side, or make grinding noises.
- β’ The engine overheats, stalls repeatedly, or misfires under load.
- β’ You are missing required tools, torque specs, or safe lifting equipment.
- β’ You are not confident in the next step or safety outcome.
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