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Home >> Lexus >> 2019 >> LS 500 Base, AWD >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Control System - Diagnostic Codes (14 Of 14), Circuit Tests & Symptom Tests (1 Of 4) >> SFI System >> DTC U0129-87: Lost Communication with Brake System Control Module Missing Message [10/2020 - ] >> Monitor Description

Monitor Description

The ECM and skid control ECU send and receive signals via CAN communication.

If a communication error occurs between the ECM and skid control ECU, the ECM stores this DTC.

DTC No. Detection Item DTC Detection Condition Trouble Area MIL Memory Note
U0129-87 Lost Communication with Brake System Control Module Missing Message All of the following conditions are met for 3.12 seconds or more (1 trip detection logic):
  • Engine switch on (IG)
  • Battery voltage is 10 V or higher
  • No communication between ECM and skid control ECU
  • CAN communication system
  • Skid control ECU
  • ECM
 - DTC stored SAE: U0129
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