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.
Transmission Position Sensor/Switch: Testing and Inspection
2005 Mazda MX-5 Miata L4-1.8L DOHCSECTION Testing and Inspection
TRANSMISSION RANGE (TR) SWITCH INSPECTION
Inspection of Operation
1. Verify that the starter operates only with the ignition switch at the START position and selector lever in the P/N position.
2. Verify that the back-up lights illuminate when shifted to the R position with the ignition switch at the ON position.
- If not as specified, inspect the continuity of the TR switch.
Inspection of Continuity
1. Inspect the OBD trouble code.
2. Remove the TR switch.
3. Inspect for continuity at the TR switch.
- If not as specified, replace the TR switch.
4. Install the TR switch.
Inspection of Operation
1. Verify that the starter operates only with the ignition switch at the START position and selector lever in the P/N position.
2. Verify that the back-up lights illuminate when shifted to the R position with the ignition switch at the ON position.
- If not as specified, inspect the continuity of the TR switch.
Inspection of Continuity
1. Inspect the OBD trouble code.
2. Remove the TR switch.
3. Inspect for continuity at the TR switch.
- If not as specified, replace the TR switch.
4. Install the TR switch.
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.