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.
2007 Mazda B2300 AutomaticFACTORY OEM SERVICE PROCEDURE
Restraint Control Module (RCM) DTCs
RESTRAINT CONTROL MODULE (RCM) DIAGNOSTIC TROUBLE CODE (DTC) LIST
| DTC | Description | Source | Action |
|---|---|---|---|
| B2432 | Driver Seat Belt Buckle Switch Circuit Open | RCM | See PINPOINT TEST 18: SAFETY BELT WARNING INDICATOR IS NEVER/ALWAYS ON , . |
| B2434 | Driver Seat Belt Buckle Switch Circuit Short to Ground | RCM | See PINPOINT TEST 18: SAFETY BELT WARNING INDICATOR IS NEVER/ALWAYS ON , . |
| B2435 | Driver Seat Belt Buckle Switch Circuit Resistance Out of Range | RCM | See PINPOINT TEST 18: SAFETY BELT WARNING INDICATOR IS NEVER/ALWAYS ON , . |
| B2438 | Passenger Seat Belt Buckle Switch Circuit Short to Ground | RCM | See PINPOINT TEST 18: SAFETY BELT WARNING INDICATOR IS NEVER/ALWAYS ON , . |
| B2439 | Passenger Seat Belt Buckle Switch Circuit Resistance Out of Range | RCM | See PINPOINT TEST 18: SAFETY BELT WARNING INDICATOR IS NEVER/ALWAYS ON , . |
| B2691 | Seat Belt Buckle Switch Circuit Fault Front Driver's Side | RCM | See DIAGNOSTIC TROUBLE CODE (DTC) INDEX - RESTRAINTS CONTROL MODULE (RCM) , . |
| B2692 | Front Passenger's Seat Belt Buckle Switch Circuit Fault | RCM | See DIAGNOSTIC TROUBLE CODE (DTC) INDEX - RESTRAINTS CONTROL MODULE (RCM) , . |
| All Other DTCs | - | RCM | See COMMUNICATIONS NETWORK , . |
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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