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 MANUALSMAZDA20086 S SPORT, 4D HATCHBACK, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 423 (SECURITY SYSTEM AND LOCKS SYSTEM)IMMOBILIZER SYSTEM REPROGRAM PROCEDURE [FEDERAL EMISSION REGULATION APPLICABLE MODELS.]BOTH IMMOBILIZER UNIT AND PCM REPLACEMENTREPROGRAM ERROR RECOVERY PROCEDURE FOR BOTH IMMOBILIZER UNIT AND PCM REPLACEMENT
2008 Mazda 6 s Sport, 4D Hatchback, Standard
Reprogram error recovery procedure for both immobilizer unit and PCM replacement
2008 Mazda 6 s Sport, 4D Hatchback, StandardSECTION 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.
- Using key 1, start engine. After security light illuminates for 1-2 seconds , turn key 1 to LOCK position.
- Using key 1, turn ignition switch to ON position then back to LOCK position five times. Key should not remain at ON position or LOCK position for more than 1 second.
- Using key 1, turn ignition switch to ON position (security light illuminates).
- Turn key 1 to LOCK position and remove from steering lock (security light goes out).
- Using key 2, start engine. Observe that security light illuminates (for 1-2 seconds ) and engine continues to run.
- Turn key 2 to LOCK position and remove from steering lock.
- Repeat Steps 5 and 6 with key 1.
- Repeat Steps 5 and 6 with key 3.
- If there are 4-8 keys (valid and/or new keys), repeat Steps 5 and 6.
- Wait for 30 seconds to quit reprogram mode.
- After reprogramming, clear DTCs of PCM with WDS or equivalent.
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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.