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 MANUALSTOYOTA2004CELICA GT, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 293 (INTRODUCTION)PRECAUTIONS FOR ALL OF VEHICLESFOR USING OBD II SCANTOOL OR TOYOTA HAND-HELD TESTER
2004 Toyota Celica GT, Standard
For Using OBD II SCANTOOL Or TOYOTA Hand-Held Tester
2004 Toyota Celica GT, StandardSECTION For Using OBD II SCANTOOL Or TOYOTA Hand-Held Tester
WARNING: This page is about a different car, the 2002 Toyota Prius. However, it is still accessible from the selected car via links, so may be relevant.
Observe the following for safety reasons:
- Before using the OBD II SCANTOOL or TOYOTA hand-held tester, the OBD II scan tool's instruction book or TOYOTA hand-held tester's operator manual should be read thoroughly.
- Be sure to route all cables securely when driving with the OBD II scan tool or TOYOTA hand- held tester connected to the vehicle. (i.e. Keep cables away from feet, pedals, steering wheel and shift lever).
- Two persons are required when test driving with the OBD II scan tool or TOYOTA hand-held tester, one person to drive the vehicle and one person to operate the OBD II scan tool or TOYOTA hand-held tester.
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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.