Section 3 (Lighting System (Triple Beam Headlight) - Diagnostic Codes & Circuit Tests)
WARNING: This page does not describe the selected car, but rather 9 other vehicles, including the 2018 Lexus RC 350, 2018 Lexus RC 300, 2017 Lexus RC 350, 2017 Lexus RC 300, and 2017 Lexus RC 200t. However, it is still accessible from the selected car via links, so may be relevant.
- LIGHTING SYSTEM (for Triple Beam Headlight)
- DTC B1244: Light Sensor Circuit Malfunction [09/2014 - 10/2018]
- DTC B242C: Right Headlight ECU Malfunction; DTC B242D: Left Headlight ECU Malfunction [09/2014 - 10/2018]
- DTC B242E: Open in IG Circuit [09/2014 - 10/2018]
- DTC B2439: Headlamp LH Circuit; DTC B243A: Headlamp RH Circuit [09/2014 - 10/2018]
- DTC B243D: Left Low Beam Fan Malfunction; DTC B243E: Right Low Beam Fan Malfunction [09/2014 - 10/2018]
- DTC B2443: Lost Communication with Left Headlight and Right Headlight LIN [09/2014 - 10/2018]
- DTC B2451: Vehicle Specifications have not been Stored [09/2014 - 10/2018]
- DTC B2455: Right Headlight ECU Variation Error [09/2014 - 10/2018]
- DTC B2456: Left Headlight ECU Variation Error [09/2014 - 11/2017]
- DTC B2456: Left Headlight ECU Variation Error [11/2017 - 10/2018]
- DTC U0073: Control Module Communication Bus OFF; DTC U0100: Lost Communication with ECM / PCM "A"; DTC U0101: Lost Communication with TCM; 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 [09/2014 - 11/2017]
- DTC U0073: Control Module Communication Bus OFF; DTC U0100: Lost Communication with ECM / PCM "A"; DTC U0101: Lost Communication with TCM; 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 [11/2017 - 10/2018]
- DTC U1000: CAN Communication Failure (Message Registry) [09/2014 - 10/2018]
- Turn Signal Switch Circuit [09/2014 - 11/2017]
- Turn Signal Switch Circuit [11/2017 - 10/2018]
- Headlight Dimmer Switch Circuit [09/2014 - 10/2018]
- Daytime Running Light Relay Circuit [09/2014 - 10/2015]
- Daytime Running Light Relay Circuit [10/2015 - 10/2018]
- Front Fog Light Circuit [09/2014 - 10/2018]
- Hazard Warning Switch Circuit [09/2014 - 11/2017]
- Hazard Warning Switch Circuit [11/2017 - 10/2018]
- Outside Handle Foot Light Circuit [09/2014 - 10/2018]
- Parking Brake Switch Circuit [09/2014 - 10/2018]
- Taillight Relay Circuit [09/2014 - 10/2018]
- Power Source Circuit [09/2014 - 10/2015]
- Power Source Circuit [10/2015 - 11/2017]
- Power Source Circuit [11/2017 - 10/2018]