Self-Diagnostic Function

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	Keyless access indicator		Description
B1601	1	◦	Keyless access control unit internal (CPU) error (see )
B1602	2	◦	Keyless access control unit internal (EEPROM) error (see )
B1632	32	◦	MTR CONT signal error (see )
B1640	40	◦	RF unit 1 not connected (see )
B1641	41	◦	RF unit 2 not connected (see )
B1646	46	◦	Driver's door LF antenna circuit open or short (see )
B1648	48	◦	Passenger's door LF antenna circuit open or short (see )
B1658	58	◦	Rear bumper LF antenna circuit open or short (see )
B1660	60	◦	Front interior LF antenna circuit open or short (see )
B1662	62	◦	Middle interior LF antenna circuit open or short (see )
B1664	64	◦	Rear interior LF antenna circuit open or short (see )
U0155	10	◦	Keyless access control unit lost communication with gauge control module (see )
U0199	7	◦	Keyless access control unit lost communication with door multiplex control unit (see )
U1280	100	◦	Communication bus line error (BUS-OFF) (see DTC U1280: COMMUNICATION BUS LINE ERROR (BUS-OFF) )
U1282	5	◦	Keyless access control unit lost communication with driver's MICU (see )
U1283	16	◦	Keyless access control unit lost communication with passenger's MICU (see )
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.