Lexus Electrical Diagnostics
Lexus uses Toyota Group electronics (Main Body ECU, gateway, Techstream) with premium infotainment, audio and ADAS systems. Common faults include body-ECU issues, smart-key faults, and advanced ADAS warnings. Hybrid models share Toyota's high-voltage architecture.
Lexus Control Modules & Electronics
Key modules and electronic systems used across Lexus vehicles. Correct identification of the module is the first step in proper diagnosis.
Main Body ECU
Central body electronics.
Gateway
Network communication.
Hybrid / Engine ECU
Powertrain and hybrid management.
Smart Key
Keyless and security.
ADAS / Camera + Radar
Lexus Safety System+ driver assistance.
Common Lexus Electrical Faults
Faults we frequently see on Lexus vehicles. Each links to a detailed, all-makes guide covering symptoms, causes and our diagnostic approach.
Body Control Module (BCM) Faults
Central body electronics controlling locking, lighting, wipers and comfort.
READ GUIDEKey Not Detected
Vehicle doesn't recognise the key — won't start or unlock.
READ GUIDEABS Warning Light
ABS warning on — stability and braking-system fault.
READ GUIDEBattery Warning Light & Vehicle Not Charging
Charging-system fault — battery warning or vehicle not charging.
READ GUIDEParking Assist Unavailable
Parking sensors or park assist not working.
READ GUIDEAirbag / SRS Warning Light
Airbag or SRS warning light on — restraint-system fault.
READ GUIDEElectric Power Steering Fault
EPS warning — steering assistance reduced or unavailable.
READ GUIDEAir Suspension Faults
Air-suspension warning — ride-height or compressor fault.
READ GUIDECAN Bus / Network Communication Faults
Network communication fault affecting multiple modules.
READ GUIDELexus Models We Cover
Lexus Electrical Fault?.
Tell us about your Lexus, the symptoms and any warning messages. OBD_PAL diagnoses the complete system before recommending any repair — don't guess, diagnose it properly.