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.
2019 Mazda 3 Preferred, 4D Hatchback, AWDFACTORY OEM SERVICE PROCEDURE
Function Inspection
- Connect the M-MDS to the DLC-2.
- Switch the ignition ON (engine off).
- Display the PIDs TP1 and TP2. (See PID/DATA MONITOR INSPECTION .)
- Compare the voltage and opening angle indications for the PIDs TP1 and TP2 with the standard in the table indicated below.
- If they do not match the standard, perform the voltage inspection. (See VOLTAGE INSPECTION .)
Standard
THROTTLE POSITION (TP) SENSOR CONDITION
| Condition | TP1 | TP2 | ||
|---|---|---|---|---|
| V | % | V | % | |
| Accelerator pedal released | Approx. 1.11 | Approx. 22 | Approx. 3.92 | Approx. 22 |
| Accelerator pedal depressed | Approx. 4.59 | Approx. 92 | Approx. 0.41 | Approx. 92 |
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:
- • 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.