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:

MICU

DTC	Description	DTC type
B1002	MICU internal error (EEPROM error)	Internal error
B1003	MICU update error	Internal error
B1028	Rear wiper motor (Park) signal error	Signal error
B1036	IG1 power supply circuit malfunction	Signal error
B1077	Windshield wiper motor (Park) signal error	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	Headlight switch parking (small) position circuit malfunction	Signal error
B1278	Headlight ON position circuit malfunction	Signal error
B1277	Head light AUTO 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
U0029	F-CAN communication line error	Loss of communication
U0100	Gauge control module lost communication with ENG/AT	Loss of communication
U0104	Gauge control module lost communication with driving support system control unit	Loss of communication
U0121	Gauge control module lost communication with ABS modulator-control unit	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
U1100	Gauge control module lost communication with driving support system control 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
U3000-49	ECU internal circuit malfunction	Internal error
U3000-51	Reprogramming error	Internal error

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
B121D	Humidity/in-car temperature sensor communication error	Signal error
B121E	Electric capacity type switch IC communication error	Signal error
B1220	A short in the recirculation control motor 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	Signal error
B1234	A short in the air mix control motor circuit	Signal error
B1235	A problem in the 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
U128D	Lost communication with gauge control module	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

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

Keyless Access Control Unit

DTC	Description	DTC type
B1601	Keyless access control unit internal (CPU) error	Internal error
B1602	Keyless access control unit internal (EEPROM) error	Internal error
B1632	MTR CONT signal error	Signal error
B1640	RF1 antenna not connected or malfunction	Signal error
B1645	Driver's door LF antenna circuit short	Signal error
B1646	Driver's door LF antenna circuit open	Signal error
B1647	Passenger's door LF antenna circuit short	Signal error
B1648	Passenger's 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
U1280	Keyless access control unit communication bus line error (BUS-OFF)	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

Keyless Access 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

Keyless Access Power Control Unit

DTC	Description	DTC type
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
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