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 XLE, FWDREPAIR AND DIAGNOSIS (SINGLE PAGE)QUICK LOOKUPSDTC INDEXDTC INDEX (4 OF 6)NAVIGATION / MULTI INFO DISPLAY DTCSTOYOTA MULTI OPERATION TOUCH SYSTEM
2025 Toyota Highlander XLE, FWD
TOYOTA Multi Operation Touch System
2025 Toyota Highlander XLE, FWDSECTION TOYOTA Multi Operation Touch System
TOYOTA MULTI OPERATION TOUCH SYSTEM DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION
| DTC Code | Description |
|---|---|
| B1522 | Lost Communication with DCU Video Line Signal |
| B1523 | DCU GVIF Disconnected (from D-SEAT SW to Multi Display) |
| B15A6 | Display Malfunction (D-SEAT SW) |
| B15D6 | Display Disconnected |
| U0073 | Control Module Communication Bus "A" Off |
| U0100 | Lost Communication with ECM / PCM "A" |
| U0101 | Lost Communication with TCM |
| U0114 | Lost Communication with Four-Wheel Drive Clutch Control Module |
| U0125 | Lost Communication with Multi-axis Acceleration Sensor Module "A" |
| U0126 | Lost Communication with Steering Angle Sensor Module |
| U0129 | Lost Communication With Brake System Control Module "A" |
| U0140 | Lost Communication with Body Control Module |
| U0155 | Lost Communication with Instrument Panel Cluster (IPC) Control Module |
| U0163 | Lost Communication with Navigation Control Module |
| U0164 | Lost Communication with HVAC Control Module |
| U0293 | Lost Communication with Hybrid/EV Powertrain Control Module |
| U1103 | Lost Communication with Stop and Start Control Module |
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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.