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Home >> Lexus >> 2021 >> LS 500h RWD >> Repair and Diagnosis >> Restraints >> Air Bag, SRS >> Airbag System (W/O Advanced Park) - Diagnostic Codes (3 Of 3) >> AIRBAG SYSTEM (w/o Advanced Park) >> DTC U0154: Lost Communication with Restraints Occupant Classification System Module; DTC U1104: Lost Communication with Driving Support ECU; DTC U124F: Lost Communication with Pedestrian Protection ECU [10/2020 - 10/2023] >> Description

DTC U0154: Lost Communication with Restraints Occupant Classification System Module; DTC U1104: Lost Communication with Driving Support ECU; DTC U124F: Lost Communication with Pedestrian Protection ECU [10/2020 - 10/2023]: Description

DTC No. Detection Item DTC Detection Condition Trouble Area Warning Indicate Test Mode / Check Mode
U0154 Lost Communication with Restraints Occupant Classification System Module Communication stop occurs between the airbag ECU assembly and occupant detection ECU continuously for 5 seconds or more.
  • CAN communication system
  • Occupant detection ECU
  • Airbag ECU assembly
 Comes on Not applicable
U1104 Lost Communication with Driving Support ECU for Stereo Camera Type: 
  1. The airbag ECU assembly is unable to receive certain data from the driving support ECU for 5 seconds or more.

for Mono Camera Type: 

  1. The airbag ECU assembly is unable to receive certain data from the forward recognition camera for 5 seconds or more.
 for Stereo Camera Type: 
  • CAN communication system
  • Driving support ECU
  • Airbag ECU assembly

for Mono Camera Type: 

  • CAN communication system
  • Forward recognition camera
  • Airbag ECU assembly
 Comes on Not applicable
U124F Lost Communication with Pedestrian Protection ECU Communication stop occurs between the airbag ECU assembly and pedestrian detection ECU assembly continuously for 5 seconds or more.
  • CAN communication system
  • Pedestrian detection ECU assembly
  • Airbag ECU assembly
 Comes on Not applicable
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