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 MANUALSACURA2015RDX AWDREPAIR AND DIAGNOSISQUICK LOOKUPSDTC INDEXKEYLESS ACCESS BACKUP CONTROL UNIT DTCS
2015 Acura RDX AWD
Keyless Access Backup Control Unit DTCS
2015 Acura RDX AWDSECTION Keyless Access Backup Control Unit DTCS
KEYLESS ACCESS BACKUP CONTROL UNIT DIAGNOSTIC TROUBLE CODE (DTC) INDENTIFICATION
| DTC | Description |
|---|---|
| B1901 | Backup Control Unit Internal Error (CPU Error (2013-18) |
| B1902 | Backup Control Unit Internal Error (EEPROM Error (2013-18) |
| B1926 | Backup Control Antenna Open or Short (2013-15) |
| B1926 | Backup Control Antenna Open or Short (2016-18) |
| B1927 | MTR CONT Signal Error (2013-18) |
| B1931 | BackUp Control Unit No Response (2013-15) |
| B1931 | BackUp Control Unit No Response (2016-18) |
| U1280 | Backup Control Unit Communication Bus Line Error (BUS-OFF) (2013-15) |
| U1280 | Backup Control Unit Communication Bus Line Error (BUS-OFF) (2016-18) |
| U128D | Backup Control Unit Lost Communication With Gauge Control Module (2013-15) |
| U128D | Backup Control Unit Lost Communication with Gauge Control Module (2016-18) |
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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.