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 MANUALSLEXUS2010LS 460L AWDREPAIR AND DIAGNOSIS (SINGLE PAGE)BODY & FRAMEDOOR LOCKSENGINE IMMOBILISER (DIAGNOSTIC CODES & CIRCUIT TESTS)
2010 Lexus LS 460L AWD
Engine Immobiliser (Diagnostic Codes & Circuit Tests)
2010 Lexus LS 460L AWDSECTION Engine Immobiliser (Diagnostic Codes & Circuit Tests)
- Engine Immobilizer System
- DTC B2784: Antenna Coil Open / Short
- DTC B278A: Short to GND in Immobilizer System Power Source Circuit
- DTC B2790: ID BOX EEPROM Malfunction
- DTC B2799: Engine Immobilizer System Malfunction
- DTC B279A: Theft Deterrent System Communication Line High Fixation
- DTC B279C: Theft Deterrent System Presence Detection
- ID Code Box Power Source Circuit
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.