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.
2017 Acura RDX AWDFACTORY OEM SERVICE PROCEDURE
Keyless Access Control Unit DTCS
KEYLESS ACCESS CONTROL UNIT DIAGNOSTIC TROUBLE CODE (DTC) INDENTIFICATION
| DTC | Description |
|---|---|
| B1601 | Keyless Access ECU CPU Error (2013-15) |
| B1601 | Keyless Access Control Unit Internal (CPU) Error (2016-18) |
| B1602 | Keyless Access Control Unit Internal (EEPROM) Error (2013-15) |
| B1602 | Keyless Access Control Unit Internal (EEPROM) Error (2016-18) |
| B1627 | RF1 Unit Disconnected (2016-18) |
| B1632 | MTR CONT Signal Error (2013-18) |
| B1640 | RF Unit Not Connected (2013-15) |
| B1640 | RF Unit Not Connected (2016-18) |
| B1641 | RF2 Unit Transmitter/receiver Circuit Malfunction (2016-18) |
| B1645 | Driver's Door LF Antenna Circuit Short (2016-18) |
| B1646 | Driver Door Antenna Circuit Open or Short (2013-15) |
| B1646 | Driver's Door LF Antenna Circuit Open (2016-18) |
| B1647 | Passenger's Door LF Antenna Circuit Short (2016-18) |
| B1648 | Front Passenger Door Antenna Circuit Open or Short (2013-15) |
| B1648 | Passenger's Door LF Antenna Circuit Open (2016-18) |
| B1649 | Driver Side Rear Passenger Door Antenna Circuit Short (2016-18) |
| B1650 | Driver Side Rear Passenger Door Antenna Circuit Open (2016-18) |
| B1651 | Passenger Side Rear Passenger Door Antenna Circuit Short (2016-18) |
| B1652 | Passenger Side Rear Passenger Door Antenna Circuit Open (2016-18) |
| B1658 | Tailgate/Rear Bumper Antenna Circuit Open or Short (2013-15) |
| B1659 | Front Interior LF Antenna Circuit Short (2016-18) |
| B1660 | Front Interior Antenna Circuit Open or Short (2013-15) |
| B1660 | Front Interior LF Antenna Circuit Open (2016-18) |
| B1662 | Middle Interior Antenna Circuit Open or Short (2013-15) |
| B1663 | Rear Interior LF Antenna Circuit Short (2016-18) |
| B1664 | Rear Interior Antenna Circuit Open or Short (2013-15) |
| B1664 | Rear Interior LF Antenna Circuit Open (2016-18) |
| U0199 | Keyless Access - P/W Communication Error (2013-18) |
| U1280 | Keyless Access ECU Bus Line Error (2013-15) |
| U1280 | Keyless Access ECU Bus Line Error (2016-18) |
| U1281 | Keyless Access Control Unit Lost Communication With MICU (2013-15) |
| U1281 | Keyless Access Control Unit Lost Communication With MICU (2016-18) |
| U128D | Keyless Access Control Unit Lost Communication With Gauge Control Module (2013-15) |
| U128D | Keyless Access Control Unit Lost Communication with Gauge Control Module (2016-18) |
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.