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Home >> Toyota >> 2023 >> GR86 Base, Standard Trans >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Communication Devices >> Can Communication System - Circuit Tests (1 Of 3) & Diagnostic Codes >> Can Communication System >> DTC B1E00: Registration Fault Of Authentication Unit; DTC C1E00: Registration Fault Of Authentication Unit; DTC P1E00: Registration Fault of Authentication Unit [11/2021 - ] >> Description
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DTC B1E00: Registration Fault Of Authentication Unit; DTC C1E00: Registration Fault Of Authentication Unit; DTC P1E00: Registration Fault of Authentication Unit [11/2021 - ]: Description

DTC No. Detection Item DTC Detection Condition Note
B1E00 Registration Fault Of Authentication Unit The communication key of the central gateway ECU (network gateway ECU) does not match other control modules after performing module registration (verification). Trouble Symptom: 
  1. Authentication communication with No. 2 network gateway ECU is not possible. (Communication error occurs in modules that conduct ECU security key communication with No. 2 network gateway ECU and related failures occur.)
C1E00 Registration Fault Of Authentication Unit The communication key of the central gateway ECU (network gateway ECU) does not match other control modules after performing module registration (verification). Trouble Symptom: 
  1. Authentication communication with brake actuator assembly and steering sensor is not possible. (Communication error occurs in modules that conduct ECU security key communication with brake actuator assembly and steering sensor. Related failures occur.)
P1E00 Registration Fault of Authentication Unit The communication key of the central gateway ECU (network gateway ECU) does not match other control modules after performing module registration (verification). Trouble Symptom: 
  1. Authentication communication with engine and AT is not possible. (Communication error occurs in modules that conduct ECU security key communication with ECM and TCM. Related failures occur.)
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