Self-diagnostic Function

WARNING: This page is about a different car, the 2010 Acura TL and 2009 Acura TL. 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. 15 (10 A) fuse from the under-hood fuse/relay box.

DTC CHART

DTC	Keyless access indicator		Description
B1601	1	◦	Keyless access control unit internal (CPU) error
B1602	2	◦	Keyless access control unit internal (EEPROM) error
B1632	32	◦	MTR CONT signal error
B1640	40	◦	RF unit 1 not connected
B1641	41	◦	RF unit 2 not connected
B1646	46	◦	Driver's door LF antenna circuit open or short
B1648	48	◦	Passenger's door LF antenna circuit open or short
B1658	58	◦	Rear bumper LF antenna circuit open or short
B1660	60	◦	Front interior LF antenna circuit open or short
B1664	64	◦	Rear interior LF antenna circuit open or short
B1668	68	◦	Rear shelf LF antenna circuit open or short
U0155	10	◦	Keyless access control unit lost communication with gauge control module
U0199	7	◦	Keyless access control unit lost communication with door multiplex control unit
U1280	100	◦	Communication bus line error (BUS-OFF)
U1282	5	◦	Keyless access control unit lost communication with driver's MICU
U1283	16	◦	Keyless access control unit lost communication with passenger's MICU

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.