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Home >> Lexus >> 2019 >> RX 450h Base >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Control System (Diagnostic Codes) (8 Of 8) & Circuit Tests) >> SFI System >> DTC U0129: Lost Communication with Brake System Control Module [08/2018 - ] >> Typical Enabling Conditions
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Typical Enabling Conditions

Monitor runs whenever the following DTCs are not stored None
Both of the following conditions are met -
Auxiliary battery Voltage 10.5 V or higher
Power switch On (IG)
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