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 DIAGNOSISHYBRID DRIVE SYSTEMSTESTING AND INSPECTIONPROGRAMMING AND RELEARNING
2011 Lexus HS 250h L4-2.4L (2AZ-FXE) Hybrid
Programming and Relearning
2011 Lexus HS 250h L4-2.4L (2AZ-FXE) HybridSECTION Programming and Relearning
HYBRID / BATTERY CONTROL: HYBRID CONTROL SYSTEM: REGISTRATION
NOTICE:
The Vehicle Identification Number (VIN) must be input into the replacement hybrid vehicle control ECU.
HINT
The VIN is a 17-digit alphanumeric vehicle identification number. The Techstream is required to register the VIN.
1. DESCRIPTION
(a) Read VIN: This process allows the VIN stored in the hybrid vehicle control ECU to be read, in order to confirm that the two VINs, provided with the vehicle and stored in the hybrid vehicle control ECU, are the same.
(b) Write VIN: This process allows the VIN to be input into the hybrid vehicle control ECU. If the hybrid vehicle control ECU is changed, or the hybrid vehicle control ECU VIN and the vehicle VIN do not match, the VIN can be registered, or overwritten in the hybrid vehicle control ECU by following this procedure.
2. READ VIN
(a) Confirm the vehicle VIN.
(b) Connect the Techstream to the DLC3.
(c) Turn the power switch on (IG).
(d) Turn the Techstream on.
(e) Enter the following menus: Powertrain / Hybrid Control / Utility / VIN / VIN Read.
3. WRITE VIN
(a) Confirm the vehicle VIN.
(b) Connect the Techstream to the DLC3.
(c) Turn the power switch on (IG).
(d) Turn the Techstream on.
(e) Enter the following menus: Powertrain / Hybrid Control / Utility / VIN / VIN Write.
RENDER: 1.0x
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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.