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 MANUALSLEXUS2011HS 250H L4-2.4L (2AZ-FXE) HYBRIDREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSTESTING AND INSPECTIONINITIAL INSPECTION AND DIAGNOSTIC OVERVIEWCHECK FOR INTERMITTENT PROBLEMS
2011 Lexus HS 250h L4-2.4L (2AZ-FXE) Hybrid
Check For Intermittent Problems
2011 Lexus HS 250h L4-2.4L (2AZ-FXE) HybridSECTION Check For Intermittent Problems
2AZ-FXE ENGINE CONTROL: SFI SYSTEM: CHECK FOR INTERMITTENT PROBLEMS
HINT
Inspect the vehicle's hybrid vehicle control ECU using check mode. Intermittent problems are easier to detect with the Techstream when the hybrid vehicle control ECU is in check mode. In check mode, the hybrid vehicle control ECU uses 1 trip detection logic, which is more sensitive to malfunctions than normal mode (default), which uses 2 trip detection logic.
(a) Clear the DTCs Reading and Clearing Diagnostic Trouble Codes.
(b) Switch the hybrid vehicle control ECU from normal mode to check mode using the Techstream Check Mode Procedure.
(c) Perform a simulation test How To Proceed With Troubleshooting.
(d) Check and wiggle the harness(es), connector(s) and terminal(s) Electronic Circuit Inspection Procedure.
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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.