Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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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 - ]DESCRIPTION
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 - ]: Description
2025 Toyota Highlander Hybrid XLESECTION Description
The No. 1 skid control ECU (brake booster with master cylinder assembly) receives signals from the hybrid vehicle control ECU, inverter with converter assembly and No. 2 skid control ECU (brake actuator assembly) via CAN communication.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | MIL | Note |
|---|---|---|---|---|---|
| U0110-00 | Lost Communication with Drive Motor Control Module "A" | When terminal IG2 voltage is 9.5 V or more, data from the inverter with converter assembly cannot be received for 2 seconds or more. |
|
Does not come on | Output ECU: No. 1 skid control ECU (brake booster with master cylinder assembly) |
| U0129-87 | Lost Communication with Brake System Control Module "A" Missing Message | When the voltage at terminal IG1 is 9.5 V or more, communication between the No. 1 skid control ECU (brake booster with master cylinder assembly) and No. 2 skid control ECU (brake actuator assembly) is not possible for 2 seconds or more. |
|
Comes on |
|
| U0293-00 | Lost Communication with Hybrid/EV Powertrain Control Module | When terminal IG2 voltage is 9.5 V or more, data from the hybrid vehicle control ECU cannot be received for 2 seconds or more. |
|
Does not come on | Output ECU: No. 1 skid control ECU (brake booster with master cylinder assembly) |
| U1106-00 | Lost Communication with Electric Parking Brake Module | With terminal IG1 voltage at 9.5 V or more, data cannot be received from the No. 2 skid control ECU (brake actuator assembly) for 1 second or more. |
|
Does not come on | Output ECU: No. 1 skid control ECU (brake booster with master cylinder assembly) |
| U1150-00 | Lost Communication with Hybrid Powertrain Control Module (ch2) | When terminal IG2 voltage is 9.5 V or more, data from the hybrid vehicle control ECU cannot be received for 2 seconds or more. |
|
Does not come on | Output ECU: No. 1 skid control ECU (brake booster with master cylinder assembly) |
| U117D-87 | Lost Communication with Brake System Control Module (ch4) Missing Message | When the voltage at terminal IG1 is 9.5 V or more, communication between the No. 1 skid control ECU (brake booster with master cylinder assembly) and No. 2 skid control ECU (brake actuator assembly) is not possible for 2 seconds or more. |
|
Comes on |
|
| U1492-57 | Software incompatibility with Hybrid/EV Powertrain Control Module Invalid/Incompatible Software Component | Either of the following is detected:
|
|
Does not come on | Output ECU: No. 1 skid control ECU (brake booster with master cylinder assembly) |
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.