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 200 (SECURITY SYSTEM AND LOCKS SYSTEM)IMMOBILIZER SYSTEM REPROGRAM PROCEDUREBOTH IMMOBILIZER UNIT AND PCM REPLACEMENTWHEN CUSTOMER HAS BROUGHT TWO OR MORE VALID KEYS
2008 Mazda 6 s Sport, 4D Hatchback, Standard
When Customer Has Brought Two Or More Valid Keys
2008 Mazda 6 s Sport, 4D Hatchback, StandardSECTION When Customer Has Brought Two Or More Valid Keys
WARNING: This page is about a different car, the 2004 Mazda MPV. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
- Keys may be valid or new keys.
- When an error occurs in Steps 1 to 4 , repeat the procedure from Step 1.
- When an error occurs in Step 5, perform the "REPROGRAM ERROR RECOVERY PROCEDURE FOR BOTH IMMOBILIZER UNIT AND PCM REPLACEMENT ".
- If no specific time interval is given, each step should be performed within 30 seconds of the previous step.
- Cut new transponder equipped key (s) if necessary.
- Replace immobilizer unit and PCM. (See IMMOBILIZER UNIT REMOVAL/INSTALLATION .) (See PCM REMOVAL/INSTALLATION .)
- Using key 1, turn ignition switch to ON position. Observe security light illuminates and then goes out in instrument cluster.
- Turn key 1 to LOCK position. Observe security light blinks once repeatedly.
- Using key 2, turn ignition switch to ON position. Observe security light illuminates and then goes out.
- Turn key 2 to LOCK position. Observe security light blink twice repeatedly.
- Using key 3, turn ignition switch to ON position. Observe security light illuminates and then goes out.
- Turn key 3 to LOCK position. Observe security light blinks three times repeatedly.
- If there are 4-8 keys (valid and/or new keys), repeat step 4.
- Wait for 30 seconds to quit reprogram mode.
- After reprogramming, clear DTC's 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.