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.
2003 Lexus GS 300FACTORY OEM SERVICE PROCEDURE
For Using OBD II Scan Tool Or LEXUS Hand-Held Tester
WARNING: This page is about a different car, the 2005 Lexus GS 430 and 2005 Lexus GS 300. However, it is still accessible from the selected car via links, so may be relevant.
CAUTION:
Observe the following items for safety reasons:
- Before using the OBD II scan tool or LEXUS hand-held tester, the OBD II scan tool's instruction book or LEXUS 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 LEXUS 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 LEXUS hand-held tester, one person to drive the vehicle and the other person to operate the OBD II scan tool or LEXUS hand-held tester.
Factory Service Tools
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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.