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 MANUALSACURA2023RDX BASEREPAIR AND DIAGNOSIS (SINGLE PAGE)QUICK LOOKUPSDTC INDEXHANDSFREELINK SYSTEM DTCS
2023 Acura RDX Base
HANDSFREELINK System DTCS
2023 Acura RDX BaseSECTION HANDSFREELINK System DTCS
HANDSFREELINK SYSTEM DIAGNOSTIC TROUBLE CODE (DTC) INDENTIFICATION
| DTC | Description | DTC Type |
|---|---|---|
| B1401 | Telematics Control Unit Internal Error (CPU Error) | Internal error |
| B1404 | Cell Phone Module Malfunction | Internal error |
| B1410 | Primary Cellular Antenna Disconnect | Signal error |
| B1411 | Primary Cellular Antenna Short to Ground | Signal error |
| B1412 | TEL Antenna Disconnected | Signal error |
| B1413 | TEL Antenna Shorted to Ground | Signal error |
| B1414 | GPS Antenna Disconnected | Signal error |
| B1415 | GPS Antenna Shorted to Ground | Signal error |
| B1416 | TELE Console Switch Assembly Disconnected | Signal error |
| B1417 | TELE Console Switch Shorted to Ground | Signal error |
| B1418 | GREEN/RED LED Disconnect | Signal error |
| B1419 | GREEN/RED LED Switch Short to Ground | Signal error |
| B1425 | CDS (Collision Detection Signal) Input Circuit Malfunction | Signal error |
| B1775 | Microphone Input/Output Open or Shorted to Power | Signal error |
| B1776 | Microphone Input/Output Shorted to Ground | Signal error |
| U1280 | Communication Bus Line Error (BUS OFF) | Loss of communication |
| U1281 | Telematics Control Unit Lost Communication with MICU (MICU Frame) | Loss of communication |
| U128D | Telematics Control Unit Lost Communication with Gauge Control Module | Loss of communication |
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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.