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 MANUALSMAZDA20133 MAZDASPEED, 2.3L ENG VIN 3REPAIR AND DIAGNOSISBODY & FRAMEDOOR LOCKSON-BOARD DIAGNOSTIC [IMMOBILIZER SYSTEM (KEYLESS ENTRY SYSTEM)]FOREWORD [IMMOBILIZER SYSTEM (KEYLESS ENTRY SYSTEM)]DTC INSPECTION NOTE
2013 Mazda 3 Mazdaspeed, 2.3L Eng VIN 3
DTC Inspection Note
2013 Mazda 3 Mazdaspeed, 2.3L Eng VIN 3SECTION DTC Inspection Note
- When there is a malfunction in the immobilizer system, DTCs are recorded in the instrument cluster and PCM. (See DTC INSPECTION [IMMOBILIZER SYSTEM (KEYLESS ENTRY SYSTEM)] .)
- There are two methods of DTC verification: One is by the number of times the security light flashes and the other is by using the M-MDS.
- If immobilizer system DTCs are not recorded even if the engine cannot be started, perform symptom troubleshooting. (See NO.3 WILL NOT CRANK [MZR 2.0, MZR 2.5] .) (See NO.3 WILL NOT CRANK [MZR 2.3 DISI TURBO] .) (See NO.3 WILL NOT CRANK [SKYACTIV-G 2.0] .)
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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.