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.
Test Procedures: Notes
Five different diagnostic modes are available through the ECCS. Diagnostic Mode I and Mode II monitor air/fuel mixture ratio using LED inspection lights. Mode III is the self-diagnostic system and is used to obtain trouble codes for component or circuit failures. Mode IV monitors for malfunction(s) in the system's on-off control switches. Mode V is the real-time diagnostic system; it monitors the system and its components during actual driving, usually to simulate intermittent condition.
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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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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