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 MANUALSMAZDA2009CX-9 FWD V6-3.7LREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSRELAYS AND MODULES - COMPUTERS AND CONTROL SYSTEMSBODY CONTROL MODULETESTING AND INSPECTIONREADING AND CLEARING DIAGNOSTIC TROUBLE CODESDTC INSPECTION [BCM]
2009 Mazda CX-9 FWD V6-3.7L
DTC Inspection [BCM]
2009 Mazda CX-9 FWD V6-3.7LSECTION DTC Inspection [BCM]
DTC INSPECTION [BCM]
1. Connect the M-MDS to the DLC-2.
2. Verify the following vehicle conditions:
- All the switches are turned off (except the ignition switch).
- All the doors, bonnet, and liftgate are closed.
- All the doors, and liftgate are unlocked.
- All the seat belts are unbuckled.
- Parking brake lever is pulled.
3. Start the engine.
NOTE:
- If the engine is not running, the BCM determines that the oil pressure switch malfunction.
4. After the vehicle is identified, select the following items from the initialization screen of the M-MDS.
- When using the IDS (laptop PC)
1 Select "Self Test".
2 Select "Modules".
3 Select "GEM".
- When using the PDS (Pocket PC)
1 Select "Module Tests".
2 Select "GEM".
3 Select "Self Test".
5. Verify the DTC according to the directions on the screen.
- If any DTCs are displayed, perform troubleshooting according to the corresponding DTC inspection.
6. After completion of repairs, clear all DTCs stored in the BCM. Clearing DTC [BCM]
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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.