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.
2011 Mazda 3 L4-2.5LFACTORY OEM SERVICE PROCEDURE
Restraint System
DTC B2856, B2886, B2887 [STANDARD DEPLOYMENT CONTROL SYSTEM]
System Malfunction Location
Detection Condition
WARNING:
- Detection conditions are for understanding the DTC outline before performing an inspection. Performing an inspection according to only the detection conditions may cause injury due to an operating error, or damage the system. When performing an inspection, always follow the inspection procedure.
- The SAS control module detects an error of impact magnitude set in the sensor, which occurs due to installation mismatch of the crash zone sensor or side air bag sensors.
Possible Causes
- Crash zone sensor misinstalled with wrong sensor
- Driver-side side air bag sensor misinstalled with wrong sensor
- Passenger-side side air bag sensor misinstalled with wrong sensor
- SAS control module malfunction
Diagnostic Procedure
Factory Service Tools
Use the Manual With the Right Hardware
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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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