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 MANUALSMAZDA20113 MAZDASPEED, 2.3 3REPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 424 (SECURITY SYSTEM AND LOCKS SYSTEM)IMMOBILIZER SYSTEM REPROGRAM PROCEDURE [CALIFORNIA EMISSION REGULATION APPLICABLE MODELS.]BOTH IMMOBILIZER UNIT AND PCM REPLACEMENTREPROGRAM ERROR RECOVERY PROCEDURE FOR BOTH IMMOBILIZER UNIT AND PCM REPLACEMENT
2011 Mazda 3 Mazdaspeed, 2.3 3
Reprogram error recovery procedure for both immobilizer unit and PCM replacement
2011 Mazda 3 Mazdaspeed, 2.3 3SECTION Reprogram error recovery procedure for both immobilizer unit and PCM replacement
WARNING: This page is about a different car, the 2005 Mazda MPV. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
- If no specific time interval is given, each step should be performed within 30 seconds of the previous step.
- Insert key 1 into the steering lock and turn the key to the ON position.
- Verify that the security light illuminates.
- After verifying that the security light goes off, turn the key to the LOCK position.
- Remove and insert key 1 five times
at no more than 1-second intervals.
- After the final key insertion, verify that the security light illuminates.
- Remove the key from the steering lock and verify that the security light goes off.
- Insert key 2 into the steering lock and turn the key to the ON position.
- Verify that the security light illuminates for 1-2 seconds.
- After verifying that the security light goes off, turn the key to the LOCK position and remove from the steering lock.
- Insert key 3 into the steering lock and turn the key to the ON position.
- Verify that the security light illuminates for 1-2 seconds.
- After verifying that the security light goes off, turn the key to the LOCK position.
- Wait for 30 seconds.
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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.