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.
Entering & Exiting Diagnostic Mode
To enter diagnostic mode, the use of a scan tool is required. With ignition on and engine off, connect scan tool to Data Link Connector (DLC) located under left side of dash. See Fig 1 . The ON-BOARD DIAGNOSTIC (OBD) SYSTEM CHECK will enter into a diagnostic system check. In this mode, PCM will display DTCs on scan tool. Refer to scan tool manufacturer's instructions. To exit diagnostic mode, turn ignition off and remove scan tool from DLC.
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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.