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 MANUALSMAZDA2009B2300 L4-2.3LREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSDESCRIPTION AND OPERATIONMODULE CONTROLLED FUNCTIONS
2009 Mazda B2300 L4-2.3L
Module Controlled Functions
2009 Mazda B2300 L4-2.3LSECTION Module Controlled Functions
MODULE CONTROLLED FUNCTIONS
The smart junction box (SJB) is the only multifunction module present on this vehicle.
The SJB is a combination of a power distribution box and a multifunction module that controls the following features:
- Parking lamps
- Front wiper and washer
- Battery saver
- Illuminated entry and interior lighting
- Driver one-touch down power window (optional)
- Remote keyless entry (RKE) (optional)
- Power door locks (optional)
- Tire pressure monitoring system (TPMS) (optional)
RENDER: 1.0x
NO RELATED
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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.