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HOMESERVICE MANUALSTOYOTA2025HIGHLANDER XLE, FWDREPAIR AND DIAGNOSIS (SINGLE PAGE)BRAKESMECHANICAL - HYDRAULICELECTRONICALLY CONTROLLED BRAKE SYSTEM (EXCEPT HV) - DIAGNOSTIC CODES (3 OF 3), SYMPTOM TESTS & CIRCUIT TESTSELECTRONICALLY CONTROLLED BRAKE SYSTEM (FOR GASOLINE MODEL)DTC U0074-88: CONTROL MODULE COMMUNICATION BUS "B" OFF BUS OFF; DTC U0100-87: LOST COMMUNICATION WITH ECM/PCM "A" MISSING MESSAGE; DTC U0101-87: LOST COMMUNICATION WITH TCM MISSING MESSAGE; DTC U0125-87: LOST COMMUNICATION WITH MULTI-AXIS ACCELERATION SENSOR MODULE MISSING MESSAGE; DTC U0126-87: LOST COMMUNICATION WITH STEERING ANGLE SENSOR MODULE MISSING MESSAGE; DTC U0151-87: LOST COMMUNICATION WITH RESTRAINTS CONTROL MODULE MISSING MESSAGE [12/2019 - ]DESCRIPTION
2025 Toyota Highlander XLE, FWD

DTC U0074-88: Control Module Communication Bus "B" Off Bus Off; DTC U0100-87: Lost Communication with ECM/PCM "A" Missing Message; DTC U0101-87: Lost Communication with TCM Missing Message; DTC U0125-87: Lost Communication with Multi-axis Acceleration Sensor Module Missing Message; DTC U0126-87: Lost Communication with Steering Angle Sensor Module Missing Message; DTC U0151-87: Lost Communication with Restraints Control Module Missing Message [12/2019 - ]: Description

2025 Toyota Highlander XLE, FWDSECTION Description

The skid control ECU (brake actuator assembly) communicates with the following ECUs and sensors via CAN communication.

  • ECM
  • TCM (ECM)
  • Yaw rate and acceleration sensor (airbag sensor assembly)
  • Steering angle sensor
  • Airbag sensor assembly
DTC No. Detection Item DTC Detection Condition Trouble Area
U0074-88 Control Module Communication Bus "B" Off Bus Off Any of the following is detected:
  • A bus OFF state occurs once or more within 0.1 seconds, 10 times in succession.
  • When the +BS terminal voltage is between 9.5 and 17.4 V, a delay in receiving data from the yaw rate and acceleration sensor (airbag sensor assembly) and steering angle sensor continues for 1 second or more.
  • When the +BS terminal voltage is between 9.5 and 17.4 V, the following occurs 10 times in succession within 60 seconds:
    • A delay in receiving data from the yaw rate and acceleration sensor (airbag sensor assembly) and steering angle sensor occurs once or more within 5 seconds.
 CAN communication system
U0100-87 Lost Communication with ECM/PCM "A" Missing Message When the +BS terminal voltage is between 9.5 and 17.4 V and the vehicle speed exceeds 15 km/h (9 mph), data cannot be received from the ECM for 2 seconds or more.
  • CAN communication system
  • ECM
  • Skid control ECU (brake actuator assembly)
U0101-87 Lost Communication with TCM Missing Message When the +BS terminal voltage is between 9.5 and 17.4 V and the vehicle speed exceeds 15 km/h (9 mph), data cannot be received from the TCM (ECM) for 2 seconds or more.
  • CAN communication system
  • TCM (ECM)
  • Skid control ECU (brake actuator assembly)
U0125-87 Lost Communication with Multi-axis Acceleration Sensor Module Missing Message Either of the following is detected:
  • When the +BS terminal voltage is between 9.5 and 17.4 V, data from the acceleration sensor (airbag sensor assembly) cannot be received for 1 second or more.
  • When the +BS terminal voltage is between 9.5 and 17.4 V, the following occurs 10 times in succession within 60 seconds:
    • Data from the acceleration sensor (airbag sensor assembly) cannot be received once or more within 5 seconds.
  • CAN communication system
  • Acceleration sensor (airbag sensor assembly)
  • Skid control ECU (brake actuator assembly)
U0126-87 Lost Communication with Steering Angle Sensor Module Missing Message Either of the following is detected:
  • When the +BS terminal voltage is between 9.5 and 17.4 V, data from the steering angle sensor cannot be received for 1 second or more.
  • When the +BS terminal voltage is between 9.5 and 17.4 V, the following occurs 10 times in succession within 60 seconds:
    • Data from the steering angle sensor cannot be received once or more within 5 seconds
  • CAN communication system
  • Steering angle sensor
  • Skid control ECU (brake actuator assembly)
U0151-87 Lost Communication with Restraints Control Module Missing Message When the +BS terminal voltage is between 9.5 and 17.4 V and the vehicle speed exceeds 7 km/h (4 mph), data cannot be received from the airbag sensor assembly for 5 seconds or more.
  • CAN communication system
  • Airbag sensor assembly
  • Skid control ECU (brake actuator assembly)
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