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.
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HOMESERVICE MANUALSMAZDA20103 L4-2.5LREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSTRANSMISSION POSITION SENSOR/SWITCHSERVICE AND REPAIR
2010 Mazda 3 L4-2.5L
Transmission Position Sensor/Switch: Service and Repair
2010 Mazda 3 L4-2.5LSECTION 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. Select the selector lever to N position.
2. 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
3. Remove in the order indicated in the table.
4. Install in the reverse order of removal.
5. 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 N position.
2. Adjust the TR switch between terminals B and C until the resistance becomes specification.
TR switch specification
- 713-788 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}
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.