DTC U0129-87: Lost Communication with Brake System Control Module Missing Message [11/2021 - ]: Description
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The ECM receives signals sent from the skid control ECU (brake actuator assembly) via the CAN communication system. When DTCs indicating a CAN communication system malfunction are output, repair the CAN communication system before repairing each corresponding ECU or sensor.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | MIL | Memory | Note |
|---|---|---|---|---|---|---|
| U0129-87 | Lost Communication with Brake System Control Module Missing Message | No communication between the ECM and skid control ECU (brake actuator assembly) for 2.2 seconds or more (1-trip detection logic) |
|
Comes on | DTC stored | SAE Code: U0129 |