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 657 (SECURITY SYSTEM AND LOCKS SYSTEM)IMMOBILIZER SYSTEM COMPONENT REPLACEMENT/KEY ADDITION AND CLEARING[WITH KEYLESS ENTRY SYSTEM]NO.4 CHANGING THE METHOD FOR REGISTERING ADDITIONAL KEYSPROCEDURE
2008 Mazda 6 s Sport, 4D Hatchback, Standard
No.4 Changing the Method for Registering Additional Keys: Procedure
2008 Mazda 6 s Sport, 4D Hatchback, StandardSECTION Procedure
WARNING: This page is about a different car, the 2008 Mazda RX-8. However, it is still accessible from the selected car via links, so may be relevant.
- Using any key, turn the ignition switch to the ON position. (Either a valid or an unregistered key can be used.)NOTE:
- When using an unregistered key, although the security light flashes and DTC 15 is displayed, this does not indicate an improper procedure. Continue to perform the procedure as indicated.
- Connect the M-MDS to the DLC-2.
- Select "Body/Security/PATS function" from the screen menu of the M-MDS.
- Perform security access as indicated on the M-MDS screen. (see No.6 Security Access Procedure .)
- Select either "Customer Spare Key Programming Enable" or "Customer Spare Key Programming Disable" from the screen menu of the M-MDS. Depending on the selected menu, the additional key registration method is as shown below:ADDITIONAL KEY REGISTRATION METHOD
Setting Additional key registration method Procedure using two valid keys Procedure using the M-MDS Customer Spare Key Programming Enable X X Customer Spare Key Programming Disable - X X: Procedure is possible -: Procedure is not possible - After verifying that the PATS function menu is displayed again on the M-MDS screen, select "Exit" to complete the M-MDS function.
- After Step 6, wait 10 s or more and then turn the ignition switch to the LOCK position.
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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.