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.
SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSTOYOTA2025HIGHLANDER XLE, FWDREPAIR AND DIAGNOSIS (SINGLE PAGE)STEERINGPOWER STEERINGPOWER STEERING SYSTEM - DIAGNOSTIC CODES & CIRCUIT TESTSPOWER STEERING SYSTEMDTC U0100: LOST COMMUNICATION WITH ECM / PCM "A"; DTC U0126: LOST COMMUNICATION WITH STEERING ANGLE SENSOR MODULE; DTC U0129: LOST COMMUNICATION WITH BRAKE SYSTEM CONTROL MODULE; DTC U023A: LOST COMMUNICATION WITH FRONT CAMERA MODULE; DTC U0293: LOST COMMUNICATION WITH HYBRID CONTROL MODULE [12/2019 - 11/2023]DESCRIPTION
2025 Toyota Highlander XLE, FWD
DTC U0100: Lost Communication with ECM / PCM "A"; DTC U0126: Lost Communication With Steering Angle Sensor Module; DTC U0129: Lost Communication with Brake System Control Module; DTC U023A: Lost Communication with Front Camera Module; DTC U0293: Lost Communication with Hybrid Control Module [12/2019 - 11/2023]: Description
2025 Toyota Highlander XLE, FWDSECTION Description
for Gasoline Model:
- The power steering ECU (rack and pinion power steering gear assembly) receives signals from the ECM, steering sensor, skid control ECU (brake actuator assembly) and forward recognition camera via CAN communication.
for HV Model:
- The power steering ECU (rack and pinion power steering gear assembly) receives signals from the hybrid vehicle control ECU, steering sensor, No. 2 skid control ECU (brake actuator assembly) and forward recognition camera via CAN communication.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | Warning Indicate | Return-to-normal Condition | Note |
|---|---|---|---|---|---|---|
| U0100 | Lost Communication with ECM / PCM "A" | Lost communication with ECM |
|
EPS warning light: When an error occurs during steering assist, the warning light does not illuminate. For errors that occur before assist (at the time of the decision to start assist), the warning light illuminates. | The ECU judges the system has returned to normal | for Gasoline Model |
| U0126 | Lost Communication With Steering Angle Sensor Module | Lost communication with steering angle sensor |
|
EPS warning light: Comes on | The ECU judges the system has returned to normal | - |
| U0129 | Lost Communication with Brake System Control Module | for Gasoline Model:
for HV Model:
|
for Gasoline Model:
for HV Model:
|
EPS warning light: Comes on | The ECU judges the system has returned to normal | - |
| U023A | Lost Communication with Front Camera Module | Lost communication with forward recognition camera |
|
EPS warning light: Does not come on | The ECU judges the system has returned to normal | - |
| U0293 | Lost Communication with Hybrid Control Module | Lost communication with hybrid vehicle control ECU |
|
EPS warning light: Does not come on | The ECU judges the system has returned to normal or the ignition switch is turned ON again | for HV Model |
RENDER: 1.0x
NO RELATED
Recommended Tools & Savings
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
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.