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.
2024 Mazda 3 Preferred, 4D HatchbackFACTORY OEM SERVICE PROCEDURE
Function Inspection
- Connect the M-MDS to the DLC-2.
- Switch the ignition ON (engine off).
- Display the PCM PID [WASTEGATE_POS_ACT] and [WASTEGATE_POS_ACT_VOLT]. (Refer to [PID/DATA MONITOR INSPECTION ] in the troubleshooting information.) (Refer to [PID/DATA MONITOR TABLE [PCM (SKYACTIV-G 2.5T)] ] in the troubleshooting information.)
- Compare the voltage and opening angle indications for the PIDs [WASTEGATE_POS_ACT_VOLT] and [WASTEGATE_POS_ACT] with the standard in the table indicated below.
- If they do not match the standard, perform the voltage inspection. (See VOLTAGE INSPECTION .)WASTEGATE VALVE POSITION SENSOR SPECIFICATIONS (STANDARD)
WASTEGATE_POS_ACT_VOLT WASTEGATE_POS_ACT Remarks V % Approx. 4.2 Approx. 100 Ignition switched ON (engine off) Approx. 4.06 Approx. 95 Idle (after warm up) Approx. 1.48 Approx. 0 Racing (Engine speed: 2, 000 rpm)
- If they do not match the standard, perform the voltage inspection. (See VOLTAGE INSPECTION .)
Factory Service Tools
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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.