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.
Reading and Clearing Diagnostic Trouble Codes
2009 Mazda CX-9 FWD V6-3.7LSECTION Reading and Clearing Diagnostic Trouble Codes
TIRE PRESSURE MONITORING SYSTEM (TPMS) ON-BOARD DIAGNOSIS
Reading DTCs Procedure
1. Connect the M-MDS to the DLC-2.
2. 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 "IC".
- When using the PDS (Pocket PC)
1 Select "Module Tests".
2 Select "IC".
3 Select "Self Test".
3. Verify the DTC according to the directions on the screen.
- If any DTCs are displayed, perform troubleshooting according to the corresponding DTC inspection.
4. After completion of repairs, clear all DTCs stored in the instrument cluster. DTC Table Instrument Cluster
Clearing DTCs Procedures
1. Connect the M-MDS to the DLC-2.
2. 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 "IC".
- When using the PDS (Pocket PC)
1 Select "Module Tests".
2 Select "IC".
3 Select "Self Test".
3. Verify the DTC according to the directions on the screen.
4. Press the clear button on the DTC screen to clear the DTC.
5. Turn the ignition switch to the LOCK position.
6. Turn the ignition switch to the ON position and wait for 5 s or more.
7. Perform DTC inspection.
8. Verify that no DTCs are displayed.
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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.