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Home >> Lexus >> 2019 >> LS 500 Base, AWD >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Headlights >> Lighting System (Ext) - Diagnostic Codes (3 Of 3), Symptom Tests & Circuit Tests (1 Of 2) >> Lighting System >> DTC U0126-87: Lost Communication with Steering Angle Sensor Module Missing Message; DTC U0129-87: Lost Communication with Brake System Control Module "A" Missing Message; DTC U0140-87: Lost Communication with Body Control Module Missing Message; DTC U0155-87: Lost Communication with Instrument Panel Cluster (IPC) Control Module Missing Message; DTC U0241-87: Lost Communication with Headlamp Control Module "A" Missing Message; DTC U114F-87: Lost Communication with Power Integration Module Missing Message [10/2023 - ] >> Description
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DTC U0126-87: Lost Communication with Steering Angle Sensor Module Missing Message; DTC U0129-87: Lost Communication with Brake System Control Module "A" Missing Message; DTC U0140-87: Lost Communication with Body Control Module Missing Message; DTC U0155-87: Lost Communication with Instrument Panel Cluster (IPC) Control Module Missing Message; DTC U0241-87: Lost Communication with Headlamp Control Module "A" Missing Message; DTC U114F-87: Lost Communication with Power Integration Module Missing Message [10/2023 - ]: Description

These DTCs are stored if a CAN communication malfunction occurs between the headlight ECU sub-assembly RH and other ECUs.

DTC No. Detection Item DTC Detection Condition Trouble Area Priority
U0126-87 Lost Communication with Steering Angle Sensor Module Missing Message The headlight ECU sub-assembly RH does not receive data from the steering sensor for approximately 10 seconds or more. CAN communication system B
U0129-87 Lost Communication with Brake System Control Module "A" Missing Message The headlight ECU sub-assembly RH does not receive data from the skid control ECU (brake actuator assembly) for approximately 10 seconds or more. CAN communication system B
U0140-87 Lost Communication with Body Control Module Missing Message The headlight ECU sub-assembly RH does not receive data from the main body ECU (multiplex network body ECU) for approximately 10 seconds or more. CAN communication system B
U0155-87 Lost Communication with Instrument Panel Cluster (IPC) Control Module Missing Message The headlight ECU sub-assembly RH does not receive data from the combination meter assembly for approximately 10 seconds or more. CAN communication system B
U0241-87 Lost Communication with Headlamp Control Module "A" Missing Message The headlight ECU sub-assembly RH does not receive data from the headlight ECU sub-assembly LH for approximately 10 seconds or more. CAN communication system B
U114F-87 Lost Communication with Power Integration Module Missing Message The headlight ECU sub-assembly RH does not receive data from the power distribution box assembly for approximately 10 seconds or more. CAN communication system B