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Home >> Toyota >> 2020 >> Prius LE AWD-e >> Repair and Diagnosis (Single Page) >> Electrical >> Gauges >> 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 [12/2018 - 08/2019] >> 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 [12/2018 - 08/2019]: 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 and driving support ECU assembly via CAN communication.

DTC No. Detection Item DTC Detection Condition Trouble Area Memory
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 continues for 2 seconds or more
  • No communication with 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
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