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Home >> Lexus >> 2025 >> RX 350h Premium >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Communication Devices >> Can Communication System - Diagnostic Codes (3 Of 3) & Circuit Tests (1 Of 7) >> CAN COMMUNICATION SYSTEM (except Gasoline Model) >> DTC U111A-87: Lost Communication with ECM/PCM "A" (ch2) Missing Message; DTC U0100-87: Lost Communication With ECM/PCM "A" Missing Message; DTC U0110-87: Lost Communication with Drive Motor Control Module "A" Missing Message; DTC U111A-00: Lost Communication with ECM/PCM "A" (ch2); DTC U1150-00: Lost Communication with Hybrid Powertrain Control Module (ch2); DTC U1150-87: Lost Communication with Hybrid/EV 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 "A" (ch2) Bus Signal / Message Failure; DTC U1170-87: Lost Communication with Brake System Control Module (ch2) Missing Message; DTC U11B7-00: Lost Communication with TCM (ch4) (System 2) Missing Message; DTC U11B7-87: Lost Communication with TCM (ch4) Missing Message; DTC U11BC-87: Lost Communication with Hybrid/EV Powertrain Control Module (ch6) Missing Message; DTC U11BE-87: Lost Communication with ECM/PCM "A" (ch7) Missing Message [08/2023 - ] >> Description
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DTC U111A-87: Lost Communication with ECM/PCM "A" (ch2) Missing Message; DTC U0100-87: Lost Communication With ECM/PCM "A" Missing Message; DTC U0110-87: Lost Communication with Drive Motor Control Module "A" Missing Message; DTC U111A-00: Lost Communication with ECM/PCM "A" (ch2); DTC U1150-00: Lost Communication with Hybrid Powertrain Control Module (ch2); DTC U1150-87: Lost Communication with Hybrid/EV 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 "A" (ch2) Bus Signal / Message Failure; DTC U1170-87: Lost Communication with Brake System Control Module (ch2) Missing Message; DTC U11B7-00: Lost Communication with TCM (ch4) (System 2) Missing Message; DTC U11B7-87: Lost Communication with TCM (ch4) Missing Message; DTC U11BC-87: Lost Communication with Hybrid/EV Powertrain Control Module (ch6) Missing Message; DTC U11BE-87: Lost Communication with ECM/PCM "A" (ch7) Missing Message [08/2023 - ]: Description

DTC No. Detection Item DTC Detection Condition Trouble Area Note
U0100-87 Lost Communication With ECM/PCM "A" Missing Message Communication stops between the No. 1 skid control ECU (brake booster with master cylinder assembly) and the ECM.
  • CAN main/branch bus lines or connector
  • No. 1 skid control ECU (brake booster with master cylinder assembly)
  • ECM
  • No. 12 junction connector
  • No. 8 CAN junction connector
  • No. 9 CAN junction connector
  • No. 10 CAN junction connector
  • No. 11 CAN junction connector
 DTC Output from
  • No. 1 skid control ECU (brake booster with master cylinder assembly)
U0110-87 Lost Communication with Drive Motor Control Module "A" Missing Message Communication stops between the No. 2 skid control ECU (brake actuator assembly) and the hybrid motor control inverter assembly.
  • CAN main/branch bus lines or connector
  • No. 2 skid control ECU (brake actuator assembly)
  • Hybrid motor control inverter assembly
  • No. 12 junction connector
  • No. 8 CAN junction connector
 DTC Output from
  • No. 2 skid control ECU (brake actuator assembly)
U111A-00 Lost Communication with ECM/PCM "A" (ch2) Communication stops between the hybrid vehicle control ECU and the ECM.
  • CAN main/branch bus lines or connector
  • Hybrid vehicle control ECU
  • ECM
  • No. 12 junction connector
  • No. 8 CAN junction connector
  • No. 9 CAN junction connector
  • No. 10 CAN junction connector
  • No. 11 CAN junction connector
 DTC Output from
  • Hybrid vehicle control ECU
U111A-87 Lost Communication with ECM/PCM "A" (ch2) Missing Message Communication stops between the No. 2 skid control ECU (brake actuator assembly) or hybrid vehicle control ECU and the ECM.
  • CAN main/branch bus lines or connector
  • No. 2 skid control ECU (brake actuator assembly)
  • Hybrid vehicle control ECU
  • ECM
  • No. 12 junction connector
  • No. 8 CAN junction connector
  • No. 9 CAN junction connector
  • No. 10 CAN junction connector
  • No. 11 CAN junction connector
 DTC Output from
  • No. 2 skid control ECU (brake actuator assembly)
  • Hybrid vehicle control ECU
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
  • No. 1 skid control ECU (brake booster with master cylinder assembly)
  • Hybrid vehicle control ECU
  • No. 12 junction connector
  • No. 8 CAN junction connector
  • No. 9 CAN junction connector
  • No. 10 CAN junction connector
  • No. 11 CAN junction connector
 DTC Output from
  • No. 1 skid control ECU (brake booster with master cylinder assembly)
U1150-87 Lost Communication with Hybrid/EV Powertrain Control Module (ch2) Missing Message Communication stops between the ECM, TCM or No. 2 skid control ECU (brake actuator assembly) and the hybrid vehicle control ECU.
  • CAN main/branch bus lines or connector
  • ECM
  • TCM
  • No. 2 skid control ECU (brake actuator assembly)
  • Hybrid vehicle control ECU
  • No. 12 junction connector
  • No. 8 CAN junction connector
  • No. 9 CAN junction connector
  • No. 10 CAN junction connector
  • No. 11 CAN junction connector
 DTC Output from
  • ECM
  • TCM
  • 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 hybrid motor control inverter assembly.
  • CAN main/branch bus lines or connector
  • ECM
  • Hybrid vehicle control ECU
  • Hybrid motor control inverter assembly
  • No. 12 junction connector
  • No. 8 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. 12 junction connector
  • No. 8 CAN junction connector
  • No. 9 CAN junction connector
  • No. 10 CAN junction connector
  • No. 11 CAN junction connector
 DTC Output from
  • No. 2 skid control ECU (brake actuator assembly)
U1170-08 Lost Communication with Brake System Control Module "A" (ch2) Bus Signal / Message Failure Communication stops between the hybrid motor control inverter assembly and the No. 2 skid control ECU (brake actuator assembly).
  • CAN main/branch bus lines or connector
  • Hybrid motor control inverter assembly
  • No. 2 skid control ECU (brake actuator assembly)
  • No. 12 junction connector
  • No. 8 CAN junction connector
 DTC Output from
  • Hybrid motor control inverter assembly
U1170-87 Lost Communication with Brake System Control Module (ch2) Missing Message Communication stops between the No. 1 skid control ECU (brake booster with master cylinder assembly), hybrid vehicle control ECU, TCM or hybrid motor control inverter assembly and the No. 2 skid control ECU (brake actuator assembly).
  • CAN main/branch bus lines or connector
  • No. 1 skid control ECU (brake booster with master cylinder assembly)
  • Hybrid vehicle control ECU
  • TCM
  • Hybrid motor control inverter assembly
  • No. 2 skid control ECU (brake actuator assembly)
  • No. 12 junction connector
  • No. 8 CAN junction connector
  • No. 9 CAN junction connector
  • No. 10 CAN junction connector
  • No. 11 CAN junction connector
 DTC Output from
  • No. 1 skid control ECU (brake booster with master cylinder assembly)
  • Hybrid vehicle control ECU
  • TCM
  • Hybrid motor control inverter assembly
U11B7-00 Lost Communication with TCM (ch4) (System 2) Missing Message Communication stops between the hybrid vehicle control ECU and the TCM.
  • CAN main/branch bus lines or connector
  • Hybrid vehicle control ECU
  • TCM
  • No. 9 CAN junction connector
  • No. 10 CAN junction connector
  • No. 11 CAN junction connector
 DTC Output from
  • Hybrid vehicle control ECU
U11B7-87 Lost Communication with TCM (ch4) Missing Message Communication stops between the hybrid vehicle control ECU and the TCM.
  • CAN main/branch bus lines or connector
  • Hybrid vehicle control ECU
  • TCM
  • No. 9 CAN junction connector
  • No. 10 CAN junction connector
  • No. 11 CAN junction connector
 DTC Output from
  • Hybrid vehicle control ECU
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. 12 junction connector
  • No. 8 CAN junction connector
  • No. 9 CAN junction connector
  • No. 10 CAN junction connector
  • No. 11 CAN junction connector
 DTC Output from
  • Hybrid vehicle control ECU
U11BE-87 Lost Communication with ECM/PCM "A" (ch7) Missing Message Communication stops between the TCM and the ECM.
  • CAN main/branch bus lines or connector
  • TCM
  • ECM
  • No. 9 CAN junction connector
  • No. 10 CAN junction connector
  • No. 11 CAN junction connector
 DTC Output from
  • TCM
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