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HOMESERVICE MANUALSTOYOTA2025HIGHLANDER HYBRID XLEREPAIR AND DIAGNOSIS (SINGLE PAGE)BRAKESMECHANICAL - HYDRAULICELECTRONICALLY CONTROLLED BRAKE SYSTEM (HV) - DIAGNOSTIC CODES (11 OF 11), SYMPTOM TESTS & CIRCUIT TESTSELECTRONICALLY CONTROLLED BRAKE SYSTEM (FOR HV MODEL)DTC U0110-00: LOST COMMUNICATION WITH DRIVE MOTOR CONTROL MODULE "A"; DTC U0129-87: LOST COMMUNICATION WITH BRAKE SYSTEM CONTROL MODULE "A" MISSING MESSAGE; DTC U0293-00: LOST COMMUNICATION WITH HYBRID/EV POWERTRAIN CONTROL MODULE; DTC U1106-00: LOST COMMUNICATION WITH ELECTRIC PARKING BRAKE MODULE; DTC U1150-00: LOST COMMUNICATION WITH HYBRID POWERTRAIN CONTROL MODULE (CH2); DTC U117D-87: LOST COMMUNICATION WITH BRAKE SYSTEM CONTROL MODULE (CH4) MISSING MESSAGE; DTC U1492-57: SOFTWARE INCOMPATIBILITY WITH HYBRID/EV POWERTRAIN CONTROL MODULE INVALID/INCOMPATIBLE SOFTWARE COMPONENT [11/2023 - ]PROCEDURE
2025 Toyota Highlander Hybrid XLE

DTC U0110-00: Lost Communication with Drive Motor Control Module "A"; DTC U0129-87: Lost Communication with Brake System Control Module "A" Missing Message; DTC U0293-00: Lost Communication with Hybrid/EV Powertrain Control Module; DTC U1106-00: Lost Communication with Electric Parking Brake Module; DTC U1150-00: Lost Communication with Hybrid Powertrain Control Module (ch2); DTC U117D-87: Lost Communication with Brake System Control Module (ch4) Missing Message; DTC U1492-57: Software incompatibility with Hybrid/EV Powertrain Control Module Invalid/Incompatible Software Component [11/2023 - ]: Procedure

2025 Toyota Highlander Hybrid XLESECTION Procedure
  1. CHECK DTC (HEALTH CHECK) 
    1. Perform the Health Check using the GTS.

      Result

      Result Proceed to
      DTCs for related systems are output together with DTC U0110-00, U0129-87, U0293-00, U1106-00, U1150-00, U117D-87 or U1492-57. A
      DTC U0110-00, U0129-87, U0293-00, U1106-00, U1150-00, U117D-87 or U1492-57 is output. B
      DTCs are not output. C

    Result: 

    A 

    GO TO DIAGNOSTIC TROUBLE CODE CHART (RELATED SYSTEM). Refer to  DIAGNOSTIC TROUBLE CODE CHART [11/2023 - ] 

    Result: 

    B 

    INSPECT CAN COMMUNICATION SYSTEM. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [11/2023 - ] 

    Result: 

    C 

    USE SIMULATION METHOD TO CHECK. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [12/2019 - ] 

RENDER: 1.0x

NO RELATED

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.