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Home >> Lexus >> 2021 >> LS 500h RWD >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Communication Devices >> Can Communication System - Circuit Tests (1 Of 9) & Diagnostic Codes >> Can Communication System >> 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 U1170-87: Lost Communication With Brake System Control Module (ch2) Missing Message; DTC U117D-87: Lost Communication with Brake System Control Module (ch4) Missing Message [11/2021 - 10/2023] >> 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 U1170-87: Lost Communication With Brake System Control Module (ch2) Missing Message; DTC U117D-87: Lost Communication with Brake System Control Module (ch4) Missing Message [11/2021 - 10/2023]: Description

DTC No. Detection Item DTC Detection Condition Trouble Area DTC Output from
U111A-87 Lost Communication with ECM/PCM "A" (ch2) Missing Message The DTC output ECU does not receive data from the ECM.
  • CAN main / branch lines or connector
  • Hybrid vehicle control ECU
  • ECM
  • Brake actuator assembly (No. 2 skid control ECU)
  • Brake booster assembly (No. 1 skid control ECU)
  • Driving support ECU assembly
  • No. 10 CAN junction connector
 Hybrid Control
Brake/EPB
U1150-00 Lost Communication with Hybrid Powertrain Control Module (ch2) The DTC output ECU does not receive data from the hybrid vehicle control ECU.
  • CAN main / branch lines or connector
  • Hybrid vehicle control ECU
  • ECM
  • Brake actuator assembly (No. 2 skid control ECU)
  • Brake booster assembly (No. 1 skid control ECU)
  • Driving support ECU assembly
  • No. 10 CAN junction connector
 Brake/EPB
U1150-87 Lost Communication with Hybrid Powertrain Control Module (ch2) Missing Message The DTC output ECU does not receive data from the hybrid vehicle control ECU.
  • CAN main / branch lines or connector
  • Hybrid vehicle control ECU
  • ECM
  • Brake actuator assembly (No. 2 skid control ECU)
  • Brake booster assembly (No. 1 skid control ECU)
  • Driving support ECU assembly
  • No. 10 CAN junction connector
 Engine
Brake Booster
U1154-87 Lost Communication with Drive Motor Control Module "A" (ch2) Missing Message The DTC output ECU does not receive data from the hybrid vehicle control ECU.
  • CAN main / branch lines or connector
  • Hybrid vehicle control ECU
  • ECM
  • Brake actuator assembly (No. 2 skid control ECU)
  • Brake booster assembly (No. 1 skid control ECU)
  • Driving support ECU assembly
  • No. 10 CAN junction connector
 Hybrid Control
U1159-87 Lost Communication with Electronic Brake Booster Control Module "A" (ch3) Missing Message The DTC output ECU does not receive data from the brake booster assembly (No. 1 skid control ECU).
  • CAN main / branch lines or connector
  • Hybrid vehicle control ECU
  • ECM
  • Brake actuator assembly (No. 2 skid control ECU)
  • Brake booster assembly (No. 1 skid control ECU)
  • Driving support ECU assembly
  • No. 10 CAN junction connector
 Brake/EPB
U1170-87 Lost Communication With Brake System Control Module (ch2) Missing Message The DTC output ECU does not receive data from the brake actuator assembly (No. 2 skid control ECU).
  • CAN main / branch lines or connector
  • Hybrid vehicle control ECU
  • ECM
  • Brake actuator assembly (No. 2 skid control ECU)
  • Brake booster assembly (No. 1 skid control ECU)
  • Driving support ECU assembly
  • No. 10 CAN junction connector
 Hybrid Control
U117D-87 Lost Communication with Brake System Control Module (ch4) Missing Message The DTC output ECU does not receive data from the brake actuator assembly (No. 2 skid control ECU).
  • CAN main / branch lines or connector
  • Hybrid vehicle control ECU
  • ECM
  • Brake actuator assembly (No. 2 skid control ECU)
  • Brake booster assembly (No. 1 skid control ECU)
  • Driving support ECU assembly
  • No. 10 CAN junction connector
 Brake Booster
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