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.
2012 Lexus HS 250hFACTORY OEM SERVICE PROCEDURE
Can Communication System
DRIVING SUPPORT ECU OUTPUT DTCS (TECHSTREAM DISPLAY/PRE-COLLISION2) DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION
| DTC Code | Description |
|---|---|
| U0235 | Lost Communication with Cruise Control Front Distance Range Sensor |
| U1002 | Lost Communication with Gateway Module (Pre-Collision2) |
| U1121 | Lost Communication with Driver Monitor ECU |
MAIN BODY ECU OUTPUT DTCS (TECHSTREAM DISPLAY/MAIN BODY) DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION
| DTC Code | Description |
|---|---|
| U0127 | Lost Communication with Tire Pressure Monitor Module |
| U0199 | Lost Communication with "Door Control Module A" |
| U0200 | Lost Communication with "Door Control Module B" |
| U0208 | Lost Communication with "Seat Control Module A" |
| U1002 | Lost Communication with Gateway Module (Main Body) |
| U1115 | Lost Communication with Tilt and Telescopic Module |
POWER MANAGEMENT CONTROL ECU OUTPUT DTCS (TECHSTREAM DISPLAY/POWER MANAGEMENT1) DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION
| DTC Code | Description |
|---|---|
| U0100 | Lost Communication with ECM |
| U0125 | Lost Communication with Yaw Rate Sensor Module |
| U0126 | Lost Communication with Steering Angle Sensor Module |
| U0129 | Lost Communication with Brake System Control Module |
| U0131 | Lost Communication with Power Steering Control Module |
| U0293 | Lost Communication with HV ECU |
| U1002 | Lost Communication with Gateway Module (Power Management1) |
| U1110 | Lost Communication with Clearance Sonar Module |
| U110B | Lost Communication with Parking Assist Control Module "B" |
POWER MANAGEMENT CONTROL ECU OUTPUT DTCS (TECHSTREAM DISPLAY/POWER MANAGEMENT2) DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION
| DTC Code | Description |
|---|---|
| U0164 | Lost Communication with A/C ECU |
| U1002 | Lost Communication with Gateway Module (Power Management2) |
Factory Service Tools
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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.
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