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Home >> Lexus >> 2015 >> ES 300h >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Warning Systems >> Lane Departure Alert System (Diagnostic Codes & Circuit Tests) >> LANE DEPARTURE ALERT SYSTEM (w/o Dynamic Radar Cruise Control System) >> DTC U0101: Lost Communication with TCM; DTC U0123: Lost Communication with Yaw Rate 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 (Combination Meter) [08/2014 - ] >> Description
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DTC U0101: Lost Communication with TCM; DTC U0123: Lost Communication with Yaw Rate 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 (Combination Meter) [08/2014 - ]: Description

These DTCs are output when a communication malfunction occurs between the sensors and ECUs.

DTC Code DTC Detection Condition Trouble Area
U0101 While the vehicle is being driven at 1 km/h (1 mph) or more, a communication between the ECM and lane departure warning camera stops for 5 seconds or more.
  • CAN communication system
  • ECM
  • Lane departure warning camera
U0123 While the vehicle is being driven at 1 km/h (1 mph) or more, a communication between the yaw rate and acceleration sensor and lane departure warning camera stops for 5 seconds or more.
  • CAN communication system
  • Airbag sensor assembly
  • Lane departure warning camera
U0129 While the power switch is on (IG), a communication between the skid control ECU and lane departure warning camera stops for 5 seconds or more.
  • CAN communication system
  • Skid control ECU (Brake booster with master cylinder assembly)
  • Lane departure warning camera
U0142 While the power switch is on (IG), a communication between the main body ECU (multiplex network body ECU) and lane departure warning camera stops for 5 seconds or more.
  • CAN communication system
  • Main body ECU (multiplex network body ECU)
  • Lane departure warning camera
U0155 While the power switch is on (IG), a communication between the combination meter assembly and lane departure warning camera stops for 50 seconds or more.
  • CAN communication system
  • Combination meter assembly
  • Lane departure warning camera