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Home >> Lexus >> 2019 >> RX 450h Base >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Drivers Assistance Systems - ADAS >> Dynamic Radar Cruise Control System (Diagnostic Codes & Circuit Tests) >> Dynamic Radar Cruise Control System >> DTC U0104: Lost Communication with Cruise Control Module; DTC U0122: Lost Communication With Vehicle Dynamics Control Module; DTC U0293: Lost Communication With Hybrid Vehicle Control System [08/2019 - ] >> Description
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DTC U0104: Lost Communication with Cruise Control Module; DTC U0122: Lost Communication With Vehicle Dynamics Control Module; DTC U0293: Lost Communication With Hybrid Vehicle Control System [08/2019 - ]: Description

The hybrid vehicle control ECU assembly communicates with each sensor and ECU via CAN communication.

If any malfunction is detected in a CAN communication circuit, one or more CAN communication system DTCs are stored.

DTC No. Detection Item DTC Detection Condition Trouble Area DTC Output from
U0104 Lost Communication with Cruise Control Module When the power switch is on (IG) and the dynamic radar cruise control system is operating, a communication malfunction between the millimeter wave radar sensor assembly and hybrid vehicle control ECU assembly is detected for approximately 1 second or more. CAN communication system Radar Cruise1
U0122 Lost Communication With Vehicle Dynamics Control Module When the power switch is on (IG) and the dynamic radar cruise control system is operating, a communication malfunction between the skid control ECU assembly and hybrid vehicle control ECU assembly is detected for approximately 2.6 seconds or more. CAN communication system Radar Cruise1
U0293 Lost Communication With Hybrid Vehicle Control System When the dynamic radar cruise control system is operating, a communication malfunction between the skid control ECU assembly and hybrid vehicle control ECU assembly is detected for approximately 1 second or more. CAN communication system Radar Cruise1