Section 4 (Lighting System (Ext) - Diagnostic Codes & Circuit Tests)
WARNING: This page does not describe the selected car, but rather 18 other vehicles, including the 2024 Lexus IS 500, 2024 Lexus IS 350, 2024 Lexus IS 300, 2023 Lexus IS 500, and 2023 Lexus IS 350. However, it is still accessible from the selected car via links, so may be relevant.
- Lighting System
- Vehicle Control History [09/2020 - ]
- DTC B1244: Light Sensor Circuit Malfunction [04/2013 - 10/2016]
- DTC B1244: Light Sensor Circuit [09/2020 - ]
- DTC B124B: Automatic High Beam System [09/2020 - ]
- DTC B124C: Automatic High Beam Camera [09/2020 - ]
- DTC B2414: Steering Position Sensor [09/2020 - ]
- DTC B2415: Vehicle Speed Sensor [09/2020 - ]
- DTC B2416: Height Control Sensor; DTC B241A: Rear Height Control Sensor [09/2020 - ]
- DTC B242C: Right Headlight ECU Malfunction; DTC B242D: Left Headlight ECU Malfunction [09/2020 - ]
- DTC B242E: Open in IG Circuit [09/2020 - ]
- DTC B2430: LED Headlight LH Circuit Malfunction; DTC B2431: LED Headlight RH Circuit Malfunction [04/2013 - 10/2016]
- DTC B2439: Headlight LH Circuit; DTC B243A: Headlight RH Circuit [09/2020 - ]
- DTC B243D: Left Low Beam Fan Malfunction; DTC B243E: Right Low Beam Fan Malfunction [09/2020 - ]
- DTC B2450: Height Sensor Initialization Incomplete [09/2020 - ]
- DTC B2451: Variation Code not Written [09/2020 - ]
- DTC B2452: Abnormal Height Sensor Data at Initialization [09/2020 - ]
- DTC B2456: Left Headlight ECU Variation Error [09/2020 - 11/2021]
- DTC B2456: Left Headlight ECU Variation Error [11/2021 - ]
- DTC U0073: Control Module Communication Bus Off; DTC U0100: Lost Communication with ECM/PCM/EV "A"; DTC U0101: Lost Communication with TCM; DTC U0126: Lost Communication with Steering Angle Sensor Module; DTC U0129: Lost Communication with Brake System Control Module; DTC U0142: Lost Communication with Body Control Module "B"; DTC U0155: Lost Communication with Instrument Panel Cluster (IPC) Control Module [09/2020 - ]
- DTC U0100: Lost Communication with ECM/PCM/EV "A"; DTC U0101: Lost Communication with TCM; DTC U0120: Lost Communication With Starter / Generator Control Module; DTC U0129: Lost Communication with Brake System Control Module; DTC U0151: Lost Communication with Restraints Control Module; DTC U0155: Lost Communication with Instrument Panel Cluster (IPC) Control Module; DTC U0182: Lost Communication with AFS; DTC U0199: Lost Communication with "Door Control Module A"; DTC U0200: Lost Communication with "Door Control Module B"; DTC U0208: Lost Communication with "Seat Control Module A"; DTC U023A: Lost Communication With Image Processing Module "A"; DTC U0327: Software Incompatibility with Vehicle Security Control Module; DTC U1002: Lost Communication with Gateway Module; DTC U1106: Lost Communication with Electric Parking Brake Module; DTC U1115: Lost Communication with Tilt & Telescopic Module; DTC U1117: Lost Communication with Accessory Gateway [09/2020 - ]
- DTC U0100-87: Lost Communication With ECM/PCM "A" Missing Message; DTC U0125-87: Lost Communication With Multi-axis Acceleration Sensor Module Missing Message; DTC U0129-87: Lost Communication with Brake System Control Module Missing Message; DTC U0140-87: Lost Communication with Body Control Module Missing Message [09/2020 - ]
- DTC U0235-87: Lost Communication with Cruise Control Front Distance Range Sensor Signal Sensor or Center Missing Message [09/2020 - ]
- DTC U0242: Lost Communication With Headlamp Control Module "B" [09/2020 - ]
- DTC U1000: CAN Communication Failure (Message Registry) [09/2020 - ]
- Turn Signal Switch Circuit [04/2013 - 10/2016]
- Turn Signal Switch Circuit [09/2020 - ]
- Automatic High Beam System does not Operate or Operation Indicator does not Illuminate [09/2020 - ]
- Headlight Dimmer Switch Circuit [04/2013 - 10/2016]
- Headlight Dimmer Switch Circuit [09/2020 - ]
- Headlight Solenoid Circuit [04/2013 - 10/2016]
- Daytime Running Light Relay Circuit [04/2013 - 10/2016]
- Parking Light/Daytime Running Light Circuit [09/2020 - ]
- Front Fog Light Circuit [04/2013 - 06/2014]
- Front Fog Light Circuit [06/2014 - 10/2016]
- Hazard Warning Switch Circuit [04/2013 - 10/2016]
- Hazard Warning Switch Circuit [09/2020 - ]
- Door Mirror Foot Light Circuit [04/2013 - 10/2016]
- Front Side Marker Light Circuit [09/2020 - ]
- Parking Brake Switch Circuit [04/2013 - 10/2016]
- Taillight Relay Circuit [04/2013 - 10/2016]
- Taillight Relay Circuit [09/2020 - ]
- Headlight Beam Level Control Actuator Circuit [09/2020 - ]
- Power Source Circuit [09/2020 - ]
- Low Beam Headlight Circuit [04/2013 - 10/2016]
- High Beam Headlight Circuit [04/2013 - 10/2016]
- High Beam Headlight Circuit [09/2020 - ]