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Home >> Toyota >> 2017 >> Prius Prime Advanced >> Repair and Diagnosis (Single Page) >> Steering >> Manual Steering >> Power Steering System - Diagnostic Codes & Circuit Tests >> Power Steering System >> DTC U0129: Lost Communication with Brake System Control Module; DTC U023A: Lost Communication with Front Camera Module; DTC U0293: Lost Communication with Hybrid Control Module; DTC U1110: Lost Communication with Intuitive Parking Assist Module [09/2016 - ] >> Description
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DTC U0129: Lost Communication with Brake System Control Module; DTC U023A: Lost Communication with Front Camera Module; DTC U0293: Lost Communication with Hybrid Control Module; DTC U1110: Lost Communication with Intuitive Parking Assist Module [09/2016 - ]: Description

The power steering ECU assembly receives signals from the skid control ECU (brake booster with master cylinder assembly), forward recognition camera, hybrid vehicle control ECU, and clearance warning ECU assembly (w/ Simple Advanced Parking Guidance System) via CAN communication.

DTC No. Detection Item DTC Detection Condition Trouble Area Warning Indicate Return-to-normal Condition Note
U0129 Lost Communication with Brake System Control Module Lost communication with skid control ECU (brake booster with master cylinder assembly)
  • CAN communication system
  • Skid control ECU (Brake booster with master cylinder assembly)
EPS warning light: Comes on The ECU judges the system has returned to normal or the power switch is turned on (IG) again -
U023A Lost Communication with Front Camera Module Lost communication with forward recognition camera
  • CAN communication system
  • Forward recognition camera
EPS warning light: Does not come on The ECU judges the system has returned to normal or the power switch is turned on (IG) again -
U0293 Lost Communication with Hybrid Control Module Lost communication with hybrid vehicle control ECU
  • CAN communication system
  • hybrid vehicle control ECU
EPS warning light: Does not come on The ECU judges the system has returned to normal or the power switch is turned on (IG) again -
U1110 Lost Communication with Intuitive Parking Assist Module Lost communication with clearance warning ECU assembly
  • CAN communication system
  • Clearance warning ECU assembly
EPS warning light: Does not come on The ECU judges the system has returned to normal or the power switch is turned on (IG) again w/ Simple Advanced Parking Guidance System