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Home >> Toyota >> 2019 >> Prius XLE AWD-e >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Gauges & Instrument Panels >> HEADUP Display - Diagnostic Codes & Circuit Tests >> HEADUP Display System >> DTC U0100: Lost Communication with ECM / PCM "A"; DTC U0142: Lost Communication with Body Control Module "B"; DTC U0163: Lost Communication with Navigation Control Module; DTC U023A: Lost Communication with Front Camera Module; DTC U1104: Lost Communication with Driving Support ECU [11/2015 - 12/2018] >> Description
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DTC U0100: Lost Communication with ECM / PCM "A"; DTC U0142: Lost Communication with Body Control Module "B"; DTC U0163: Lost Communication with Navigation Control Module; DTC U023A: Lost Communication with Front Camera Module; DTC U1104: Lost Communication with Driving Support ECU [11/2015 - 12/2018]: Description

The combination meter mirror ECU communicates with the ECM, hybrid vehicle control ECU, main body ECU (multiplex network body ECU), navigation receiver assembly, forward recognition camera*1 and driving support ECU assembly*2 via CAN communication.

DTC No. Detection Item DTC Detection Condition Trouble Area Memory Note
U0100 Lost Communication with ECM / PCM "A" When IG voltage is 9.5 V or more and the following condition is detected:
  • No communication with ECM or hybrid vehicle control ECU continues for 3 seconds or more
  • ECM
  • Hybrid vehicle control ECU
  • CAN communication system
  • Combination meter mirror ECU
DTC stored -
U0142 Lost Communication with Body Control Module "B" When IG voltage is 9.5 V or more and the following condition is detected:
  • No communication with main body ECU (multiplex network body ECU) continues for 3 seconds or more
  • Main body ECU (multiplex network body ECU)
  • CAN communication system
  • Combination meter mirror ECU
DTC stored -
U0163 Lost Communication with Navigation Control Module When IG voltage is 9.5 V or more and the following condition is detected:
  • No communication with navigation receiver assembly continues for 3 seconds or more
  • Navigation receiver assembly
  • CAN communication system
  • Combination meter mirror ECU
DTC stored -
U023A Lost Communication with Front Camera Module When IG voltage is 9.5 V or more and the following condition is detected:
  • No communication with forward recognition camera continues for 10 seconds or more
  • Forward recognition camera
  • CAN communication system
  • Combination meter mirror ECU
DTC stored w/ Lane Departure Alert System
U1104 Lost Communication with Driving Support ECU When IG voltage is 9.5 V or more and the following condition is detected:
  • No communication with driving support ECU assembly continues for 10 seconds or more
  • Driving support ECU assembly
  • CAN communication system
  • Combination meter mirror ECU
DTC stored w/ Pre-collision System
  1. *1: w/ Lane Departure Alert System
  2. *2: w/ Pre-collision System