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.

2010 Mazda CX-9 Touring, 3.7 V, AWDFACTORY OEM SERVICE PROCEDURE

DTC B2477 [Advanced Keyless Entry And Start System]: Notes

DTC B2477 CHART (ADVANCED KEYLESS ENTRY AND START SYSTEM)

DTC B2477	Configuration error
DETECTION CONDITION	Keyless control module configuration has not been performed correctly
POSSIBLE CAUSE	Keyless control module configuration error Malfunction in the keyless control module internal circuit

Factory Service Tools

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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.

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