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.
2011 Acura TL BaseFACTORY OEM SERVICE PROCEDURE
Keyless Access System
KEYLESS ACCESS DIAGNOSTIC TROUBLE CODE (DTC) INDENTIFICATION
| DTC | Description |
|---|---|
| B1601 | Keyless access control unit internal (CPU) error |
| B1602 | Keyless access control unit internal (EEPROM) error |
| B1632 | MTR CONT signal error |
| B1640 | RF unit 1 not connected |
| B1641 | RF unit 2 not connected |
| B1646 | Driver's door LF antenna circuit open or short |
| B1648 | Passenger's door LF antenna circuit open or short |
| B1658 | Rear bumper LF antenna circuit open or short |
| B1660 | Front interior LF antenna circuit open or short |
| B1664 | Rear interior LF antenna circuit open or short |
| B1668 | Rear shelf LF antenna circuit open or short |
| U0155 | Keyless access control unit lost communication with gauge control module |
| U0199 | Keyless access control unit lost communication with door multiplex control unit |
| U1280 | Communication bus line error (BUS-OFF) |
| U1282 | Keyless access control unit lost communication with driver's MICU |
| U1283 | Keyless access control unit lost communication with passenger's MICU |
Factory Service Tools
Use the Manual With the Right Hardware
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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.
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