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 MANUALSMAZDA2023CX-5 SREPAIR AND DIAGNOSISENGINE PERFORMANCESYSTEMON-BOARD DIAGNOSTIC - INTRODUCTION
2023 Mazda CX-5 S
On-Board Diagnostic - Introduction
2023 Mazda CX-5 SSECTION On-Board Diagnostic - Introduction
- Accessory Activation
- Basic Knowledge
- Outline
- Terminology
- Functions
- Notes
- Malfunction detection function
- External on-board diagnostic tester communication function
- Memory function
- Malfunction indication function
- PID/data monitor function
- Simulation function
- How to make use of PID/data monitor function and simulation function (Ex. Wipers do not operate correctly)
- Self-test function
- On-Board Diagnostic (OBD) test mode
- Notes
- Mode 1: On-Board system readiness test
- Mode 2: Freeze frame data
- Mode 3: Exhaust gas purification system related CMDTC
- Mode 4: Exhaust gas purification system-related malfunction information deletion/reset
- Mode 5: HO2S monitor test
- Mode 6: Diagnostic monitoring test
- Mode 7: Pending code
- Mode 8: Force drive
- Mode 9: Vehicle information read out
- Topological figure
- Block Diagram
- Circuit Inspection
- Clearing DTC
- Configuration
- Connector Inspection
- DTC Inspection
- On-Board Diagnostic (OBD) Test Modes
- PID/Data Monitor Inspection
- Simulation Inspection
- Tester Usage History
- Troubleshooting Procedure
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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.