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.
Air Conditioning System: Precaution
- Do Not Handle Refrigerant In An Enclosed Area Or Near An Open Flame
- Always Wear Eye Protection
- Be Careful Not To Get Liquid Refrigerant In Your Eyes Or On Your Skin
If liquid refrigerant gets in your eyes or on your skin.
- Wash the area with lots of cool water.CAUTION: Do not rub your eyes or skin.
- Apply clean petroleum jelly to the skin.
- Go immediately to a physician or hospital for professional treatment.
- Wash the area with lots of cool water.
- Never Heat Container Or Expose It To Naked Flame
- Be Careful Not To Drop Container And Not To Apply Physical Shocks To It
- Do Not Operate Compressor Without Enough Refrigerant In Refrigerant System
If there is not enough refrigerant in the refrigerant system oil lubrication will be insufficient and compressor burnout may occur, so take care to avoid this, necessary care should be taken.
- Do Not Open High Pressure Manifold Valve While Compressor Is Operating
If the high pressure valves opened, refrigerant flows in the reverse direction and could cause the charging cylinder to rupture, so open and close the only low pressure valve.
- Be Careful Not To Overcharge System With Refrigerant
If refrigerant is overcharged, it causes problems such as insufficient cooling, poor fuel economy, engine overheating etc.
- Supplemental Restraint System (SRS)
The LEXUS IS300 is equipped with an SRS (See AIR BAG RESTRAINT SYSTEMS ) such as the driver, passenger and side airbag Failure to carry out service operations in the correct sequence could cause the SRS to unexpectedly deploy during servicing, possibly leading to a serious accident. Before servicing (including removal or installation of parts, inspection or replacement), be sure to read the precautionary notices in the RS section.
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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.