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.
2021 Mazda 3 BaseFACTORY OEM SERVICE PROCEDURE
Forced Ignition On
NOTE:
- In order to perform a forced ignition ON, the M-MDS is necessary. If the servicing is being done outside of an Authorized Mazda dealership, contact an Authorized Mazda dealership for instructions.
- The forced ignition ON procedure forces a power supply to each part when no power is available even after the ignition switch has been operated. However, the engine cannot be started and the steering cannot be unlocked.
- When performing a forced ignition ON procedure, remove all remote transmitters from the vehicle. If a remote transmitter is left in the vehicle, the forced ignition ON procedure cannot be done.
- Verify that there are no remote transmitters in the vehicle.
- Connect the M-MDS to the DLC-2.
- Activate the M-MDS and perform the following procedure.
- Press [Start] to start the vehicle identification.
- Press the [Toolbox] tab.
- Press the [Work Support] icon.
- Press the [POWER SYSTEMS].
- Press [Run] for [Compulsory Ignition ON].
- Switch the ignition ON according to the directions on the M-MDS screen.
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.
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