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Home >> Toyota >> 2012 >> Prius Plug-in >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Cruise Control Systems >> Cruise Control System (Plug-In) (Diagnostic Codes & Circuit Tests) >> Cruise Control System >> DTC U0122: Lost Communication with Vehicle Dynamics Control Module >> Description
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DTC U0122: Lost Communication with Vehicle Dynamics Control Module: Description

The vehicle speed sensors send vehicle speed signals to the brake booster with master cylinder (skid control ECU). Signals are then sent to the power management control ECU.

DTC No. DTC Detection Condition Trouble Area
U0122 While power switch is on (IG), communication stop between brake booster with master cylinder (skid control ECU) and power management control ECU continues for 2.6 seconds or more
  • Brake booster with master cylinder (skid control ECU)
  • CAN communication system
  • Power management control ECU