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Home >> Lexus >> 2021 >> LS 500 Base, AWD >> Repair and Diagnosis >> Brakes >> Mechanical - Hydraulic >> Electronically Controlled Brake System (W/ Vacuum Brake Booster) - Diagnostic Codes (3 Of 4) >> ELECTRONICALLY CONTROLLED BRAKE SYSTEM (w/ Vacuum Brake Booster) >> DTC C1437: Lost Communication with ECM [12/2017 - 09/2018] >> Description

DTC C1437: Lost Communication with ECM [12/2017 - 09/2018]: Description

The skid control ECU (brake actuator assembly) receives signals from the ECM via CAN communication.

DTC No. Detection Item DTC Detection Condition Trouble Area Note
C1437 Lost Communication with ECM When the +BS terminal voltage is between 10 to 17.4 V and the vehicle speed is 15 km/h (9 mph) or more, data cannot be sent to the ECM for 2 seconds or more.
  • CAN communication system
  • Skid control ECU (brake actuator assembly)
  • ECM
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