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DTC U0129: Lost Communication with Brake System Control Module [06/2015 - ]: Description

The ECM receives signals sent from the skid control ECU via CAN communication. When DTCs indicating a CAN communication system malfunction are output, repair the CAN communication system before performing troubleshooting for each corresponding ECU or sensor.

DTC No. Detection Item DTC Detection Condition Trouble Area MIL Memory
U0129 Lost Communication with Brake System Control Module 1. Diagnosis Condition 2. Malfunction Status 3. Malfunction Time 4. Other
  1. The ignition switch is ON.
  2. There is no communication between the ECM and skid control ECU.
  3. 2.22 seconds
  4. 1-trip detection logic
  • CAN communication system
  • Brake actuator assembly (Skid control ECU)
  • ECM
 Comes on DTC stored
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