Network Communication DTC Troubleshooting Index

NOTE: Record all DTCs, and sort them by DTC type using the DTC troubleshooting index, then troubleshoot the DTC(s) in this order:

	Internal error DTCs
	Loss of communication DTCs
	Signal error DTCs

MICU

DTC	Description	DTC type
B1002	MICU internal error (EEPROM error)	Internal error
B1003	MICU update error	Internal error
B1026	Passenger's door lock switch malfunction	Signal error
B1036	IG1 power supply circuit malfunction	Signal error
B1077	Windshield wiper motor (Park) signal error	Signal error
B1081	Left side LED headlight malfunction	Signal error
B1082	Left side LED headlight circuit malfunction	Signal error
B1083	Right side LED headlight malfunction	Signal error
B1084	Right side LED headlight circuit malfunction	Signal error
B1127	Driver's door key cylinder switch input circuit malfunction (Simultaneous input of lock and unlock signal)	Signal error
B1128	Driver's door remote switch input circuit malfunction (Simultaneous input of lock and unlock signal)	Signal error
B1129	Driver's door knob switch input circuit malfunction (Simultaneous input of lock and unlock signal)	Signal error
B1275	Headlight OFF position circuit malfunction	Signal error
B1276	Head light switch parking (small) position circuit malfunction	Signal error
B1277	Headlight AUTO position circuit malfunction	Signal error
B1278	Headlight ON position circuit malfunction	Signal error
B1279	Dimmer switch circuit malfunction	Signal error
B1280	Turn signal switch circuit malfunction	Signal error
B1281	Front wiper MIST position circuit malfunction	Signal error
B1282	Front wiper INT (AUTO) position circuit malfunction	Signal error
B1283	Front wiper LOW position circuit malfunction	Signal error
B1284	Front wiper HIGH position circuit malfunction	Signal error
U1280	Communication bus line error (BUS-OFF)	Loss of communication
U128D	MICU lost communication with gauge control module	Loss of communication

Gauge Control Module

DTC	Description	DTC type
B1175	Fuel level sensor (fuel gauge sending unit) circuit malfunction	Signal error
B1176	Fuel level sensor (fuel gauge sending unit) circuit short	Signal error
B1192	Gauge control module lost communication with battery sensor ECU (LIN BUS connected)	Loss of communication
U0029	F-CAN communication line error	Loss of communication
U0100	Gauge control module lost communication with ENG/AT	Loss of communication
U0122	Gauge control module lost communication with VSA modulator-control unit	Loss of communication
U0131	Gauge control module lost communication with EPS unit	Loss of communication
U0151	Gauge control module lost communication with SRS unit	Loss of communication
U1280	Communication bus line error (BUS-OFF)	Loss of communication
U1281	Gauge control module lost communication with MICU (MICU frame)	Loss of communication
U1288	Gauge control module lost communication with PARKSR	Loss of communication
U129C	Gauge control module lost communication with multi purpose camera unit	Loss of communication
U3000-49	ECU Internal Circuit Malfunction	Loss of communication
U3000-51	Reprogramming Error	Loss of communication

Immobilizer-keyless Control Unit

DTC	Description	DTC type
U1280	Communication bus line error (BUS-OFF)	Loss of communication
U1281	Lost communication with MICU (MICU frame)	Loss of communication
U128D	Lost communication with METER	Loss of communication

Climate Control

DTC	Description	DTC type
B121A	An open in the mode control motor circuit	Signal error
B121B	A short in the mode control motor circuit	Signal error
B1220	A short in the recirculation control motor circuit	Signal error
B1225	An open in the in-car temperature sensor circuit	Signal error
B1226	A short in the in-car temperature sensor circuit	Signal error
B1227	An open in the outside air temperature sensor circuit	Signal error
B1228	A short in the outside air temperature sensor circuit	Signal error
B1229	An open in the sunlight sensor circuit	Signal error
B1230	A short in the sunlight sensor circuit	Signal error
B1231	An open in the evaporator temperature sensor circuit	Signal error
B1232	A short in the evaporator temperature sensor circuit	Signal error
B1233	An open in the air mix control motor circuit (driver's)	Signal error
B1234	A short in the air mix control motor circuit (driver's)	Signal error
B1235	A problem in the air mix control motor circuit, linkage, door, or motor (driver's)	Signal error
B1236	An open in the passenger's air mix control motor circuit	Signal error
B1237	A short in the passenger's air mix control motor circuit	Signal error
B1238	A problem in the passenger's air mix control motor circuit, linkage, door, or motor	Signal error
B1240	A problem in the mode control motor circuit, linkage, door, or motor	Signal error
B1241	A problem in the blower motor circuit	Signal error
B2983	A problem in the recirculation control motor circuit, linkage, door, or motor	Signal error
B2986	An open in the recirculation control motor circuit	Signal error
U1280	Communication bus line error (BUS-OFF)	Loss of communication
U1281	Lost communication with MICU	Loss of communication
U128D	Lost communication with gauge control module (climate control unit)	Loss of communication

Power Window Master Switch

DTC	Description	DTC type
B1125	Driver's power window motor A pulse malfunction	Signal error
B1126	Driver's power window motor B pulse malfunction	Signal error
B1127	Driver's door lock key cylinder switch malfunction	Signal error
B1128	Driver's door lock switch malfunction	Signal error
B1129	Driver's door lock knob switch malfunction	Signal error
B1130	Front passenger's power window motor A pulse malfunction	Signal error
B1131	Front passenger's power window motor B pulse malfunction	Signal error
B1140	Driver's power window position detect circuit malfunction	Signal error
B1142	Door multiplex control unit lost communication with front passenger's power window switch (UART line open)	Signal error
B1145	Front passenger's power window position detect circuit malfunction	Signal error
U0164	Door multiplex control unit lost communication with climate control unit	Loss of communication
U1280	Communication bus line error (BUS-OFF)	Loss of communication
U1281	Door multiplex control unit lost communication with MICU	Loss of communication
U128D	Door multiplex control unit lost communication with gauge control module	Loss of communication
U1299	Door multiplex control unit lost communication with climate control unit	Loss of communication

Automatic Lighting Control Unit-Sensor

DTC	Description	DTC type
B1575	Auto light sensor error	Internal error
U1280	BUS OFF state is detected by CAN controller	Loss of communication
U1281	Auto light control unit lost communication with MICU	Loss of communication
U128D	Auto light control unit lost communication with gauge control module	Loss of communication

Automatic Lighting/Rain Sensor

DTC	Description	DTC type
B2352	Rain light sensor unit internal error (EEPROM error)	Internal error
B2375	Rain sensor malfunction	Internal error
B2376	Light sensing malfunction	Internal error
U1280	B-CAN communication bus line error (BUS-OFF)	Loss of communication
U1281	Rain light sensor lost communication with MICU	Loss of communication
U128D	Rain Light Sensor Unit lost communication with gauge control module	Loss of communication

Auto High-Beam Control Unit

DTC	Description	DTC type
B1A05	Auto high-beam control unit internal failure	Signal error
B1A06	Auto high-beam camera blocked failure	Signal error
U1280	Auto high-beam control unit communication bus line error (BUS-OFF)	Loss of communication
U1281	Auto high-beam control unit lost communication with MICU	Loss of communication
U128D	Auto high-beam control unit lost communication with Gauge control module	Loss of communication

Keyless Access Control Unit

DTC	Description	DTC type
B1601	Keyless Access ECU CPU Error	Internal error
B1602	Keyless Access ECU EEPROM Error	Internal error
B1632	MTR CONT signal error	Signal error
B1640	RF unit not connected	Signal error
B1645	Driver's door LF antenna circuit short	Signal error
B1646	Driver's door LF antenna circuit open	Signal error
B1647	Passenger door LF antenna circuit Short	Signal error
B1648	Passenger door LF antenna circuit open	Signal error
B1657	Rear bumper LF antenna circuit short	Signal error
B1658	Rear bumper 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	Rear interior LF antenna circuit short	Signal error
B1664	Rear interior LF antenna circuit open	Signal error
B1667	Rear shelf LF antenna circuit short	Signal error
B1668	Rear shelf LF antenna circuit open	Signal error
U1280	Keyless Access ECU BUS Line Error	Loss of communication
U1281	Keyless access control unit lost communication with MICU	Loss of communication
U128D	Keyless access control unit lost communication with gauge control module	Loss of communication

Backup Control Unit

DTC	Description	DTC type
B1926	Backup control antenna open or short	Internal error
B1931	Backup Control Unit No Response	Signal error
U1280	Backup control unit communication bus line error (BUS-OFF)	Loss of communication
U128D	Backup control unit lost communication with gauge control module	Loss of communication

Power Control Unit

DTC	Description	DTC type
B12A1	Power control unit internal (CPU) error	Internal error
B12C5	Engine start/stop switch failure	Internal error
B12C6	Electric steering lock switch C/D monitor circuit failure	Internal error
B12C7	Electric steering lock motor circuit failure	Internal error
B12D0	Power control unit IG1A circuit error	Internal error
B12D1	Power control unit IG1B circuit error	Internal error
B12D2	Power control unit IG2 circuit error	Internal error
B12D3	Power control unit IG latch circuit error	Internal error
B12E0	Electric steering lock switch internal error	Internal error
B12E1	Electric steering lock motor internal error	Internal error
B12E2	Electric steering lock low level failure of MTRCUT1	Signal error
B12E3	Electric steering lock high level failure of MTRCUT1	Signal error
B12E4	Electric steering lock high level failure of MTRCUT2	Signal error
B12E5	Incorrect assembly of control unit for electric steering lock equipped vehicle	Signal error
B12F0	Power control unit lost communication with electric steering lock	Loss of communication
B12F2	Communication fail between keyless access control unit and PCU	Loss of communication
U0073	F-CAN communication bus line error	Loss of communication
U0100	Power control unit lost communication with PCM	Loss of communication
U0122	Power control unit lost communication with VSA modulator-control unit (VSA message)	Loss of communication
U1280	Power control unit communication bus line error (BUS-OFF)	Loss of communication
U1281	Power control unit lost communication with MICU	Loss of communication
U128D	Power control unit lost communication with gauge control module	Loss of communication

Power Seat Control Unit

DTC	Description	DTC type
B1802	Power seat control unit failure	Internal error
B1825	Slide pulse error(no change in pulse for 1 second)	Internal error
B1826	Front height pulse error(no change in pulse for 1 second)	Internal error
B1827	Rear height pulse error(no change in pulse for 1 second)	Internal error
B1828	Driver seat recline motor pulse error	Internal error
B1829	AT-P signal and VSP signal mismatch	Signal error
B1836	Power seat position sensor circuit short	Signal error
B1837	Memory position calling timeout	Signal error
B1844	Power seat slide switch circuit malfunction	Signal error
B1845	Power seat recline switch circuit malfunction	Signal error
B1846	Power seat front up-down switch circuit malfunction	Signal error
B1847	Power seat rear up-down switch circuit malfunction	Signal error
U1280	Communication bus line error (a bus OFF state is detected by MSC)	Loss of communication
U1281	Lost communication with MICU (MICU frame)	Loss of communication
U128D	Lost communication with gauge control module (VSP/NE frame)	Loss of communication

Parking and Back-Up Sensor Control Unit

DTC	Description	DTC type
B2601	Parking sensor CPU error	Internal error
B2602	Parking sensor EEPROM error	Internal error
B2625	Left front sensor failure	Signal error
B2628	Right front sensor failure	Signal error
B2629	Left rear sensor failure	Signal error
B2630	Center left rear sensor failure	Signal error
B2631	Center right rear sensor failure	Signal error
B2632	Right rear sensor failure	Signal error
B2635	IND erroneous lighting	Signal error
B2636	Vehicle status combination error	Signal error
B2637	Sensor power failure	Signal error
B2638	Front left sensor bus failure	Signal error
B2641	Front right sensor bus failure	Signal error
B2642	Rear left sensor bus failure	Signal error
B2643	Rear left center sensor bus failure	Signal error
B2644	Rear right center sensor bus failure	Signal error
B2645	Rear right sensor bus failure	Signal error
U0155	Lost communication with gauge control module	Loss of communication
U1280	B-CAN communication bus line error (BUS-OFF)	Loss of communication
U1282	Lost communication with Driver's MICU	Loss of communication

Wireless Charger

DTC	Description	DTC type
B22A0	Wireless charger unit failure	Internal error
B22A1	Wireless charger unit ACC input circuit failure	Signal error
U1280	Communication bus line Error (Bus OFF)	Loss of communication
U1281	Wireless charger unit lost communication with MICU	Loss of communication
U1286	Wireless charger unit lost communication with Keyless Access Control Unit	Loss of communication
U128D	Wireless charger unit lost communication with Gauge control module	Loss of communication
U128E	Wireless charger unit lost communication with Audio-Navigation Unit	Loss of communication