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Home >> Toyota >> 2018 >> Prius C One >> Repair and Diagnosis >> Accessories & Equipment >> Communication Devices >> Can Communication System (W/O Safety Sense C) - Diagnostic Codes & Symptom Tests >> CAN COMMUNICATION SYSTEM(w/o Toyota Safety Sense C) >> DTC U0129: Lost Communication with Brake System Control Module [11/2015 - ] >> Description

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

DTC No. DTC Detection Condition Trouble Area
U0129 No communication from the brake booster with master cylinder assembly (skid control ECU) continues.
  • Brake booster with master cylinder assembly (Skid control ECU) branch line or connector
  • Power source circuit of brake booster with master cylinder assembly (skid control ECU)
  • Brake booster with master cylinder assembly (Skid control ECU) ground circuit
  • Brake booster with master cylinder assembly (Skid control ECU)

HINT: 

This diagnosis procedure is for when DTC U0129 is output only by the hybrid vehicle control ECU (Techstream display: Hybrid Control).