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Home >> Lexus >> 2023 >> NX 350 Base >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Headlights >> Lighting System (W/ Level Control) - Diagnostic Codes (2 Of 2) & Circuit Tests >> LIGHTING SYSTEM (w/ Automatic Headlight Beam Level Control System) >> DTC U023A-87: Lost Communication with Image Processing Module "A" [11/2021 - 03/2022] >> Description
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DTC U023A-87: Lost Communication with Image Processing Module "A" [11/2021 - 03/2022]: Description

The headlight ECU sub-assembly LH communicates with the forward recognition camera, front side radar sensor (RH)* and blind spot monitor sensor RH (A) via CAN communication. If communication between the headlight ECU sub-assembly LH and forward recognition camera stops, the headlight ECU sub-assembly LH will store this DTC.

  1. *: w/ Front Cross Traffic Alert
DTC No. Detection Item DTC Detection Condition Trouble Area DTC Output from Priority
U023A-87 Lost Communication with Image Processing Module "A" Detection condition: 
  1. The ignition switch is ON.

Malfunction status: 

  1. A communication malfunction with the forward recognition camera is detected

Malfunction duration: 

  1. 10 seconds or more
  • Front camera system
  • Forward recognition camera
  • Headlight ECU sub-assembly LH
  • Front side radar sensor (RH)*
  • Blind spot monitor sensor RH (A)
  • No. 4 CAN junction terminal
  • Harness or connector
Headlight Control B
  1. *: w/ Front Cross Traffic Alert

HINT: 

If the DTCs are simultaneously output, the inspection area can be narrowed down.

Pattern DTC output part name
(Display on GTS)
Suspected Area (Malfunction Status)
Headlight ECU Sub-assembly LH Forward Recognition Camera
Headlight Control Front Recognition Camera
U023A-87 U0232-87 U0241-87 U1236-87*
Pattern 1 Harness or connector (Open or short)
Blind spot monitor sensor RH (A) (Internal malfunction)
Front side radar sensor (RH) (Internal malfunction)*
Headlight ECU sub-assembly LH (Internal malfunction)
Forward recognition camera (Internal malfunction)
Pattern 2 - - Harness or connector (Open)
Forward recognition camera (Internal malfunction)

◦: DTC is output

-: DTC is not output

*: w/ Front Cross Traffic Alert