Self-Diagnostic Function
WARNING: This page is about a different car, the 2016 Acura RDX, 2015 Acura RDX, 2014 Acura RDX, and 2013 Acura RDX. However, it is still accessible from the selected car via links, so may be relevant.
The keyless access system has a self-diagnostic function. If any malfunction is stored in the keyless access control unit, the DTC codes can be determined by the keyless access indicator blinking pattern.
Short the SCS line with the HDS, then press the engine start/stop button to select the ON mode. The keyless access indicator starts to show the DTCs if any DTCs are stored.
The DTC is cleared when the battery terminal is disconnected, or by removing the No. A29 (10 A) fuse from the under-hood fuse/relay box.
| DTC | Keyless access indicator | Description | |
|---|---|---|---|
| B1601 - Refer to: DTC Troubleshooting: B1601 (2013-15), or DTC Troubleshooting: B1601 (2016-17) | 1 | ◦ | Keyless access ECU CPU error |
| B1602 - Refer to: DTC Troubleshooting: B1602 (2013-15), or DTC Troubleshooting: B1602 (2016-17) | 2 | ◦ | Keyless access ECU EEPROM error |
| B1632 | 32 | ◦ | MTRCONT signal error |
| B1640 - Refer to: DTC Troubleshooting: B1640 (2013-15), or DTC Troubleshooting: B1640 (2016-17) | 40 | ◦ | RF unit circuit malfunction |
| B1646 - Refer to: DTC Troubleshooting: B1646 (2013-15), or DTC Troubleshooting: B1646 (2016-17) | 46 | ◦ | Driver door antenna circuit open or short |
| B1648 - Refer to: DTC Troubleshooting: B1648 (2013-15), or DTC Troubleshooting: B1648 (2016-17) | 48 | ◦ | Front passenger door antenna circuit open or short |
| B1658 | 58 | ◦ | Tailgate/rear bumper antenna circuit open or short |
| B1660 - Refer to: DTC Troubleshooting: B1660 (2013-15), or DTC Troubleshooting: B1660 (2016-17) | 60 | ◦ | Front interior antenna circuit open or short |
| B1662 | 62 | ◦ | Middle interior antenna circuit open or short |
| B1664 - Refer to: DTC Troubleshooting: B1664 (2013-15), or DTC Troubleshooting: B1664 (2016-17) | 64 | ◦ | Rear interior antenna circuit open or short |
| U0199 | 7 | ◦ | Keyless access - P/W communication error |
| U1280 - Refer to: DTC Troubleshooting: U1280(Keyless Access Control Unit) (2013-15), or DTC Troubleshooting: U1280(Keyless Access Control Unit) (2016-17) | 100 | ◦ | Keyless access ECU bus line error |
| U1281 - Refer to: DTC Troubleshooting: U1281(Keyless Access Control Unit) (2013-15), or DTC Troubleshooting: U1281(Keyless Access Control Unit) (2016-17) | 5 | ◦ | Keyless access control unit lost communication with MICU |
| U128D - Refer to: DTC Troubleshooting: U128D(Keyless Access Control Unit) (2013-15), or DTC Troubleshooting: U128D(Keyless Access Control Unit) (2016-17) | 10 | ◦ | Keyless access control unit lost communication with gauge control module |
NOTE:
When the engine start/stop button is pressed and the mode changes to ON, the keyless access indicator comes on when any malfunction is detected.