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.
2015 Lexus GS 350 Base, AWDFACTORY OEM SERVICE PROCEDURE
Engine Control System - Diagnostics - Introduction
- SFI System
- Precaution [09/2014 - 10/2015]
- Definition Of Terms [09/2014 - 10/2015]
- Parts Location [09/2014 - 10/2015]
- System Diagram [09/2014 - 10/2015]
- How To Proceed With Troubleshooting [09/2014 - 10/2015]
- Check For Intermittent Problems [09/2014 - 10/2015]
- Basic Inspection [09/2014 - 10/2015]
- Registration [09/2014 - 10/2015]
- Initialization [09/2014 - 10/2015]
- Checking Monitor Status [09/2014 - 10/2015]
- Readiness Monitor Drive Pattern [09/2014 - 10/2015]
- Problem Symptoms Table [09/2014 - 10/2015]
- Terminals Of ECM [09/2014 - 10/2015]
- Diagnosis System [09/2014 - 10/2015]
- DTC Check / Clear [09/2014 - 10/2015]
- Freeze Frame Data [09/2014 - 10/2015]
- Check Mode Procedure [09/2014 - 10/2015]
- Fail-Safe Chart [09/2014 - 10/2015]
- Data List / Active Test [09/2014 - 10/2015]
- Diagnostic Trouble Code Chart [09/2014 - 10/2015]
Factory Service Tools
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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