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.
2021 Lexus NX 300h BaseFACTORY OEM SERVICE PROCEDURE
ASC System
ASC SYSTEM DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION [10/2014 - 09/2017]
| DTC Code | Description |
|---|---|
| B1360 | Speaker Circuit |
| B1361 | Volume Switch Circuit |
| B1362 | ECU Malfunction |
| U0129 | Lost Communication with Brake System Control Module |
| U0142 | Lost Communication with Body Control Module "B" |
| U0293 | Lost Communication With Hybrid Powertrain Control Module |
| U0418 | Invalid Data Received From Brake System Control Module |
| U0422 | Invalid Data Received from Body Control Module |
| U0594 | Invalid Data Received From Hybrid Powertrain Control Module |
ASC SYSTEM DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION [09/2017 - ]
| DTC Code | Description |
|---|---|
| B1360 | Speaker Circuit |
| B1361 | Volume Switch Circuit |
| B1362 | ECU Malfunction |
| U0129 | Lost Communication with Brake System Control Module |
| U0142 | Lost Communication with Body Control Module "B" |
| U0293 | Lost Communication With Hybrid Powertrain Control Module |
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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