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 300 Base, AWDFACTORY 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 |
| U0100 | Lost Communication with ECM / PCM "A" |
| U0122 | Lost Communication with Vehicle Dynamics Control Module |
| U0142 | Lost Communication with Body Control Module "B" |
| U0418 | Invalid Data Received From Brake System Control Module |
| U0422 | Invalid Data Received from Body Control Module |
ASC SYSTEM DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION [09/2017 - ]
| DTC Code | Description |
|---|---|
| B1360 | Speaker Circuit |
| B1361 | Volume Switch Circuit |
| B1362 | ECU Malfunction |
| U0100 | Lost Communication with ECM / PCM "A" |
| U0122 | Lost Communication with Vehicle Dynamics Control Module |
| U0142 | Lost Communication with Body Control Module "B" |
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Disclosure: Verified tool recommendations may earn an affiliate commission at no 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.