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DTC U0129: Lost Communication with Brake System Control Module [06/2015 - 11/2018]: Description

DTC No. Detection Item DTC Detection Condition Trouble Area Note
U0129 Lost Communication with Brake System Control Module No communication from the skid control ECU (brake booster with master cylinder assembly) continues.
  • Skid control ECU (brake booster with master cylinder assembly) branch line or connector
  • Power source circuit of skid control ECU (brake booster with master cylinder assembly)
  • Skid control ECU (brake booster with master cylinder assembly) ground circuit
  • Skid control ECU (brake booster with master cylinder assembly)
HINT: 
The network gateway ECU stores DTCs when it detects a communication stop or network communication error for ECUs connected to sub bus 2.

HINT: 

This diagnosis procedure is for when DTC U0129 is output by the network gateway ECU (Techstream display: Gateway).