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.
SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSACURA2015MDX BASEREPAIR AND DIAGNOSIS (SINGLE PAGE)QUICK LOOKUPSDTC INDEX (EXCEPT HYBRID)KEYLESS ACCESS CONTROL UNIT DTCS
2015 Acura MDX Base
Keyless Access Control Unit DTCS
2015 Acura MDX BaseSECTION Keyless Access Control Unit DTCS
KEYLESS ACCESS CONTROL UNIT DIAGNOSTIC TROUBLE CODE (DTC) INDENTIFICATION
| DTC | Description | DTC type |
|---|---|---|
| B1601 | Keyless Access Control Unit internal (CPU) error | Internal error |
| B1602 | Keyless Access Control Unit internal (EEPROM) error | Internal error |
| B1627 - Refer to: DTC Troubleshooting: B1627 (2017 2018 2019 2020) | RF1 Unit disconnected (2-way transceiver or RF antenna disconnected) | Signal error |
| B1632 | MTR CONT signal error | Signal error |
| B1640 | RF1 antenna not connected or malfunction (Internal RF antenna malfunction) | Signal error |
| B1641 - Refer to: DTC Troubleshooting: B1641 (2017 2018 2019 2020), . | RF2 antenna not connected or malfunction (2-way transceiver or RF antenna not connected or malfunction) | Signal error |
| B1645 | Driver's Door LF Antenna circuit short (Left-Front LF Antenna circuit short) | Signal error |
| B1646 | Driver's Door LF Antenna circuit open (Left-Front LF Antenna circuit open) | Signal error |
| B1647 | Passenger's Door LF Antenna circuit short (Right-Front LF Antenna circuit short) | Signal error |
| B1648 | Passenger's Door LF Antenna circuit open (Right-Front LF Antenna circuit open) | Signal error |
| B1649 | Driver Side Rear Passenger Door Antenna circuit short (Left-Rear LF Antenna circuit short) | Signal error |
| B1650 | Driver Side Rear Passenger Door Antenna circuit open (Left-Rear LF Antenna circuit open) | Signal error |
| B1651 | Passenger side rear passenger door antenna circuit short (Right-Rear LF Antenna circuit short) | Signal error |
| B1652 | Passenger side rear passenger door antenna circuit open (Right-Rear LF Antenna circuit open) | Signal error |
| B1659 | Front Interior LF Antenna circuit short | Signal error |
| B1660 | Front Interior LF Antenna circuit open | Signal error |
| B1663 - Refer to: DTC Troubleshooting: B1663 (2017 2018 2019 2020), . | Rear Interior LF Antenna circuit short | Signal error |
| B1664 - Refer to: DTC Troubleshooting: B1664 (2017 2018 2019 2020) | Rear Interior LF Antenna circuit open | Signal error |
| U1280 | Keyless Access Control Unit communication Bus Line Error (BUS-OFF) | Loss of communication |
| U1281 - Refer to: DTC Troubleshooting: U1281 (2017 2018 2019 2020) | Keyless Access Control Unit lost communication with MICU | Loss of communication |
| U128D - Refer to: DTC Troubleshooting: U128D (2017 2018 2019 2020), . | Keyless Access Control Unit lost communication with Gauge Control Module | Loss of communication |
RENDER: 1.0x
NO RELATED
Recommended Tools & Savings
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra 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.