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Home >> Toyota >> 2021 >> Mirai XLE >> Repair and Diagnosis >> Accessories & Equipment >> Exterior Lights >> Lighting System (W/ Headlight Ecu) - Diagnostic Codes (2 Of 2) & Circuit Tests >> LIGHTING SYSTEM (w/ Headlight ECU) >> DTC U1000: CAN Communication Failure (Message Registry) [11/2020 - 11/2021] >> Description

DTC U1000: CAN Communication Failure (Message Registry) [11/2020 - 11/2021]: Description

The headlight ECU sub-assembly LH or headlight ECU sub-assembly RH stores this DTC if it detects an internal malfunction related to the CAN communication system.

DTC No. Detection Item DTC Detection Condition Trouble Area DTC Output from Priority
U1000 CAN Communication Failure (Message Registry) Detection condition: 
  1. The ignition switch is ON

Malfunction status: 
  1. CAN communication failure

Malfunction duration: 
  1. -
 Headlight ECU sub-assembly LH HL AutoLeveling A
DTC No. Detection Item DTC Detection Condition Trouble Area DTC Output from Priority
U1000 CAN Communication Failure (Message Registry) Detection condition: 
  1. The ignition switch is ON

Malfunction status: 
  1. CAN communication failure

Malfunction duration: 
  1. -
 Headlight ECU sub-assembly RH HL AutoLeveling (Sub) A
DTC No. Detection Item DTC Detection Condition Trouble Area DTC Output from Priority
U1000 CAN Communication Failure (Message Registry) Detection condition: 
  1. The ignition switch is ON

Malfunction status: 
  1. CAN communication failure

Malfunction duration: 
  1. -
 Headlight ECU sub-assembly LH AFS A
DTC No. Detection Item DTC Detection Condition Trouble Area DTC Output from Priority
U1000 CAN Communication Failure (Message Registry) Detection condition: 
  1. The ignition switch is ON

Malfunction status: 
  1. CAN communication failure

Malfunction duration: 
  1. -
 Headlight ECU sub-assembly RH AFS (Sub) A
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