FUNCTION
| Headlight ECU Sub-assembly LH | Headlight ECU Sub-assembly RH |
| Air Conditioning Amplifier Assembly | Air Conditioning Control Assembly |
| Steering Vibration and Heater ECU*1 | Map Light Assembly*2 - IR Matrix Sensor |
| Rear Power Seat Switch*3 | Main Body ECU (Multiplex Network Body ECU) |
| Front Multiplex Network Door ECU LH | Front Multiplex Network Door ECU RH |
| Rear Multiplex Network Door ECU LH | Rear Multiplex Network Door ECU RH |
| Front Power Window Regulator Motor Assembly LH | Front Power Window Regulator Motor Assembly RH |
| Rear Power Window Regulator Motor Assembly LH | Rear Power Window Regulator Motor Assembly RH |
| Multiplex Network Master Switch Assembly | Side Window Curtain Assembly Rear LH*4 |
| Side Window Curtain Assembly Rear RH*4 | Kick Door Control Sensor*5 |
| Sliding Roof Control ECU | FR Position Control ECU Assembly LH |
| Valve Control ECU (for Support) (FR LH)*6 | Valve Control ECU (for Seat Back) (FR LH)*7 |
| Valve Control ECU (for Seat Cushion) (FR LH)*7 | FR Position Control ECU Assembly RH |
| Valve Control ECU (for Support) (FR RH)*6 | Valve Control ECU (for Seat Back) (FR RH)*7 |
| Valve Control ECU (for Seat Cushion) (FR RH)*7 | RR Position Control ECU Assembly LH*8 |
| RR Position Control ECU Assembly RH*8 | Valve Control ECU (for Support) (RR LH)*6, *8 |
| Valve Control ECU 1 (for Seat Back) (RR LH)*7, *8 | Valve Control ECU 2 (for Seat Back) (RR LH)*7, *8 |
| Valve Control ECU (for Seat Cushion) (RR LH)*7, *8 | Valve Control ECU (for Support) (RR RH)*6, *8 |
| Valve Control ECU 1 (for Seat Back) (RR RH)*7, *8 | Valve Control ECU 2 (for Seat Back) (RR RH)*7, *8 |
| Valve Control ECU (for Seat Cushion) (RR RH)*7, *8 | Rear Multi Operation Panel (Rear Power Seat Switch)*8 |
| Certification ECU (Smart Key ECU Assembly) | Steering Lock ECU |
| ID Code Box (Immobilizer Code ECU) | Rain Sensor |
| Windshield Wiper Motor Assembly | Hybrid Vehicle Control ECU Assembly |
| Battery State Sensor Assembly | Compressor with Motor Assembly |
| Forward Recognition Camera*9 | Object Recognition Camera*10 |
| Double Lock Door Control Relay Assembly*10 | - |
*1: Models with steering wheel heater system
*2: Models with Multi-zone (4-ZONE) Climate Control
*3: Models without rear power seat system
*4: Models with rear door sunshade system
*5: Models with hands free power trunk lid
*6: Models without seat vibration system
*7: Models with seat vibration system
*8: Models with rear power seat system
*9: Models with Lexus Safety System +
*10: Models with Lexus Safety System +A
*11: Models with double locking function
DIAGNOSIS
If a malfunction occurs on a LIN communication bus, ECUs that are connected to the CAN communication bus store Diagnostic Trouble Codes (DTCs) in memory.
The 5-digit DTCs can be read by connecting the Global TechStream (GTS) to the DLC3.
For details, refer to the Repair Manual.