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Home >> Scion >> 2013 >> tC Automatic Trans >> Repair and Diagnosis (Single Page) >> Steering >> Power Steering >> Power Steering System (Diagnostic Codes & Circuit Tests) >> Power Steering System >> DTC U0100, U0129: Lost Communication with ECM/PCM "A"; Lost Communication with Brake System Control Module >> Description
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DTC U0100, U0129: Lost Communication with ECM/PCM "A"; Lost Communication with Brake System Control Module: Description

The power steering ECU receives signals from the ECM and brake actuator assembly (skid control ECU) via the CAN communication system.

DTC Code DTC Detection Condition Trouble Area
U0100 Lost communication with ECM/PCM "A".
  • CAN communication system
  • ECM
U0129 Lost communication with the brake system control module.
  • CAN communication system
  • Brake actuator assembly (skid control ECU)
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