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Home >> Toyota >> 2023 >> Prius LE >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Communication Devices >> Can Communication System (HEV) - Circuit Tests (1 Of 3) & Diagnostic Codes >> CAN COMMUNICATION SYSTEM (for HEV Model) >> DTC U111A-87: Lost Communication with ECM/PCM "A" (ch2) Missing Message; DTC U1150-00: Lost Communication with Hybrid Powertrain Control Module (ch2); DTC U1150-87: Lost Communication with Hybrid Powertrain Control Module (ch2) Missing Message; DTC U1154-87: Lost Communication with Drive Motor Control Module "A" (ch2) Missing Message; DTC U1159-87: Lost Communication with Electronic Brake Booster Control Module "A" (ch3) Missing Message; DTC U1170-08: Lost Communication with Brake System Control Module (ch2) Bus Signal / Message Failure; DTC U1170-87: Lost Communication with Brake System Control Module (ch2) Missing Message; DTC U117D-87: Lost Communication with Brake System Control Module (ch4) Missing Message; DTC U11BC-87: Lost Communication with Hybrid/EV Powertrain Control Module (ch6) Missing Message [12/2022 - ] >> Description
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DTC U111A-87: Lost Communication with ECM/PCM "A" (ch2) Missing Message; DTC U1150-00: Lost Communication with Hybrid Powertrain Control Module (ch2); DTC U1150-87: Lost Communication with Hybrid Powertrain Control Module (ch2) Missing Message; DTC U1154-87: Lost Communication with Drive Motor Control Module "A" (ch2) Missing Message; DTC U1159-87: Lost Communication with Electronic Brake Booster Control Module "A" (ch3) Missing Message; DTC U1170-08: Lost Communication with Brake System Control Module (ch2) Bus Signal / Message Failure; DTC U1170-87: Lost Communication with Brake System Control Module (ch2) Missing Message; DTC U117D-87: Lost Communication with Brake System Control Module (ch4) Missing Message; DTC U11BC-87: Lost Communication with Hybrid/EV Powertrain Control Module (ch6) Missing Message [12/2022 - ]: Description

DTC No. Detection Item DTC Detection Condition Trouble Area Note
U111A-87 Lost Communication with ECM/PCM "A" (ch2) Missing Message Communication stops between the hybrid vehicle control ECU or No. 2 skid control ECU (brake actuator assembly) and the ECM.
  • CAN main/branch bus lines or connector
  • ECM
  • No. 2 skid control ECU (brake actuator assembly)
  • Hybrid vehicle control ECU
  • No. 1 CAN junction connector
  • No. 2 CAN Junction Connector
 DTC Output from
  • Hybrid vehicle control ECU
  • No. 2 skid control ECU (brake actuator assembly)
U1150-00 Lost Communication with Hybrid Powertrain Control Module (ch2) Communication stops between the No. 1 skid control ECU (brake booster with master cylinder assembly) and the hybrid vehicle control ECU.
  • CAN main/branch bus lines or connector
  • Hybrid vehicle control ECU
  • No. 1 skid control ECU (brake booster with master cylinder assembly)
  • No. 1 CAN junction connector
 DTC Output from
  • No. 1 skid control ECU (brake booster with master cylinder assembly)
U1150-87 Lost Communication with Hybrid Powertrain Control Module (ch2) Missing Message Communication stops between the ECM or No. 2 skid control ECU (brake actuator assembly) and the hybrid vehicle control ECU.
  • CAN main/branch bus lines or connector
  • ECM
  • No. 2 skid control ECU (brake actuator assembly)
  • Hybrid vehicle control ECU
  • No. 1 CAN junction connector
  • No. 2 CAN Junction Connector
 DTC Output from
  • ECM
  • No. 2 skid control ECU (brake actuator assembly)
U1154-87 Lost Communication with Drive Motor Control Module "A" (ch2) Missing Message Communication stops between the ECM or hybrid vehicle control ECU and the inverter with converter assembly.
  • CAN main/branch bus lines or connector
  • ECM
  • Hybrid vehicle control ECU
  • Inverter with converter assembly
  • No. 1 CAN junction connector
  • No. 2 CAN Junction Connector
 DTC Output from
  • ECM
  • Hybrid vehicle control ECU
U1159-87 Lost Communication with Electronic Brake Booster Control Module "A" (ch3) Missing Message Communication stops between the No. 2 skid control ECU (brake actuator assembly) and the No. 1 skid control ECU (brake booster with master cylinder assembly).
  • CAN main/branch bus lines or connector
  • No. 2 skid control ECU (brake actuator assembly)
  • No. 1 skid control ECU (brake booster with master cylinder assembly)
  • No. 2 CAN Junction Connector
 DTC Output from
  • No. 2 skid control ECU (brake actuator assembly)
U1170-08 Lost Communication with Brake System Control Module (ch2) Bus Signal / Message Failure Communication stops between the hybrid vehicle control ECU or inverter with converter assembly and the No. 2 skid control ECU (brake actuator assembly).
  • CAN main/branch bus lines or connector
  • Inverter with converter assembly
  • No. 2 skid control ECU (brake actuator assembly)
  • No. 1 CAN junction connector
  • No. 2 CAN Junction Connector
 DTC Output from
  • Hybrid vehicle control ECU
  • Inverter with converter assembly
U1170-87 Lost Communication with Brake System Control Module (ch2) Missing Message Communication stops between the inverter with converter assembly or hybrid vehicle control ECU and the No. 2 skid control ECU (brake actuator assembly).
  • CAN main/branch bus lines or connector
  • Inverter with converter assembly
  • Hybrid vehicle control ECU
  • No. 2 skid control ECU (brake actuator assembly)
  • No. 1 CAN junction connector
  • No. 2 CAN Junction Connector
 DTC Output from
  • Inverter with converter assembly
  • Hybrid vehicle control ECU
U117D-87 Lost Communication with Brake System Control Module (ch4) Missing Message Communication stops between the No. 1 skid control ECU (brake booster with master cylinder assembly) and the No. 2 skid control ECU (brake actuator assembly).
  • CAN main/branch bus lines or connector
  • No. 2 skid control ECU (brake actuator assembly)
  • No. 1 skid control ECU (brake booster with master cylinder assembly)
  • No. 1 CAN junction connector
  • No. 2 CAN Junction Connector
 DTC Output from
  • No. 1 skid control ECU (brake booster with master cylinder assembly)
U11BC-87 Lost Communication with Hybrid/EV Powertrain Control Module (ch6) Missing Message Communication stops between the hybrid vehicle control ECU and the No. 2 skid control ECU (brake actuator assembly).
  • CAN main/branch bus lines or connector
  • Hybrid vehicle control ECU
  • No. 2 skid control ECU (brake actuator assembly)
  • No. 1 CAN junction connector
  • No. 2 CAN junction connector
 DTC Output from
  • Hybrid vehicle control ECU
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