Network Communication DTC Troubleshooting Index (2017 2018 2019)
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
Automatic Lighting Control Unit
| 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 | High beam support system internal system failure | Internal error |
| B1A06 | High beam support system camera blocked failure | Internal error |
| U1280 | High beam support system control unit communication bus line error (BUS-OFF) | Loss of communication |
| U1281 | High beam support system control unit lost communication with MICU | Loss of communication |
| U128D | High beam support system control unit 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 |
| U0104 | Gauge control module lost communication with Driving Support System Control Unit | Loss of communication |
| U0114 | Gauge control module lost communication with All Wheel Drive Control Module | Loss of communication |
| U0122 | Gauge control module lost communication with VSA modulator-control unit | Loss of communication |
| U0127 | Gauge control module lost communication with TPMS control unit | Loss of communication |
| U0131 | Gauge control module lost communication with EPS unit | Loss of communication |
| DTC | Description | DTC type |
|---|---|---|
| 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 |
| U1288 | Gauge control module lost communication with PARKSR | Loss of communication |
| U128F | Gauge control module lost communication with BSI unit | Loss of communication |
| U3000-49 | ECU internal circuit malfunction | Internal error |
| U3000-51 | Reprogramming error | Internal error |
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 | B-CAN communication bus line error (BUS-OFF) | Loss of communication |
| U128D | Backup control unit lost communication with gauge control module | 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 |
| B1649 | Driver side rear passenger door LF antenna circuit short | Signal error |
| B1650 | Driver side rear passenger door LF antenna circuit open | Signal error |
| B1651 | Passenger side rear passenger door LF antenna circuit short | Signal error |
| B1652 | Passenger side rear passenger door 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 Power Control Unit
| DTC | Description | DTC type |
|---|---|---|
| B12C5 | Engine start/stop switch failure | Signal error |
| B12C6 | Electric steering lock switch C/D monitor circuit failure | Signal error |
| B12C7 | Electric steering lock motor circuit failure | Signal 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 |
| DTC | Description | DTC type |
|---|---|---|
| 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 | B-CAN 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 |
MICU
| DTC | Description | DTC type |
|---|---|---|
| B1002 | MICU internal error (EEPROM error) | Internal error |
| B1003 | MICU update error | Internal 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 |
| B1275 | Headlight OFF position circuit malfunction | Signal error |
| B1276 | Headlight 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 |
| U0199 | MICU lost communication with power window master switch | Loss of communication |
| U1280 | B-CAN communication bus line error (BUS-OFF) | Loss of communication |
| U128D | MICU lost communication with gauge control module | Loss of communication |
Multiplex Control Unit, Door (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 |
| DTC | Description | DTC type |
|---|---|---|
| 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) | Loss of communication |
| 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 |
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 |
| B2610 | Front 1st sensor failure | Signal error |
| B2613 | Front 4th sensor failure | Signal error |
| B2614 | Rear 1st sensor failure | Signal error |
| B2615 | Rear 2nd sensor failure | Signal error |
| B2616 | Rear 3rd sensor failure | Signal error |
| B2617 | Rear 4th sensor failure | Signal error |
| B2618 | Front 1st sensor data failure | Signal error |
| B261B | Front 4th sensor data failure | Signal error |
| B261C | Rear 1st sensor data failure | Signal error |
| B261D | Rear 2nd sensor data failure | Signal error |
| B261E | Rear 3rd sensor data failure | Signal error |
| B261F | Rear 4th sensor data failure | Signal error |
| B2646 | Front sensor power failure | Signal error |
| B2647 | Rear sensor power failure | Signal error |
| B2648 | Front sensor signal short to ground | Signal error |
| B2649 | Rear sensor signal short to ground | Signal error |
| B264A | Indicator circuit short to power | Signal error |
| B264B | Indicator circuit short to ground | Signal error |
| B264D | Front sensor combination error | Signal error |
| U0155 | Lost communication with gauge control module | Loss of communication |
| U1280 | B-CAN communication bus line error (BUS-OFF) | Loss of communication |
| U1281 | Lost communication with MICU | Loss of communication |
Power Seat Control Unit
| DTC | Description | DTC type |
|---|---|---|
| B1802 | Power seat control unit internal (EEPROM) error | Internal error |
| B1803 | Power mirror control unit internal (EEPROM) error | 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 | Recline pulse error (no change in pulse for 1 second) | Internal error |
| B1829 | AT-P signal and VSP signal mismatch | Signal error |
| DTC | Description | DTC type |
|---|---|---|
| B1836 | Power seat position sensor circuit short | Signal error |
| B1837 | Memory position calling timeout | Signal error |
| B1843 | LOCAL communication error | Loss of communication |
| 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 |
| U0199 | Power seat control unit lost communication with door multiplex control unit (DRLockSW frame) | Loss of communication |
| U1280 | B-CAN communication bus line error (BUS-OFF) | Loss of communication |
| U1281 | Power seat control unit lost communication with MICU (MICU frame) | Loss of communication |
| U128D | Lost communication with gauge control module (VSP/NE frame) | Loss of communication |
Rear Seat Heater Control Unit
| DTC | Description | DTC type |
|---|---|---|
| B1FA0 | Left rear heater thermistor circuit open (rear seat) | Signal error |
| B1FA1 | Left rear heater thermistor circuit short (rear seat) | Signal error |
| B1FA2 | Right rear heater thermistor circuit open (rear seat) | Signal error |
| B1FA3 | Right rear heater thermistor circuit short (rear seat) | Signal error |
| B1FAB | Left rear heater current abnormal high (rear seat) | Signal error |
| B1FAC | Left rear heater current abnormal low (rear seat) | Signal error |
| B1FAD | Right rear heater current abnormal high (rear seat) | Signal error |
| B1FAE | Right rear heater current abnormal low (rear seat) | Signal error |
| B1FB3 | Left rear heater not heating (rear seat) | Signal error |
| B1FB4 | Right rear heater not heating (rear seat) | Signal error |
| B1FBB | Left rear main heater switch failure (rear seat) | Signal error |
| B1FBC | Right rear main heater switch failure (rear seat) | Signal error |
| U1064 | Seat heater control unit lost communication with climate control unit (rear seat) | Loss of communication |
| U1280 | Seat heater control unit communication bus line error (BUS-OFF) (rear seat) | Loss of communication |
Ventilated Seat Control Unit
| DTC | Description | DTC type |
|---|---|---|
| B1C55 | Driver's heater thermistor circuit open | Signal error |
| B1C56 | Driver's heater thermistor circuit short | Signal error |
| B1C57 | Passenger's heater thermistor circuit open | Signal error |
| B1C58 | Passenger's heater thermistor circuit short | Signal error |
| B1C60 | Driver's heater current abnormal high | Signal error |
| B1C61 | Driver's heater current abnormal low | Signal error |
| B1C62 | Passenger's heater current abnormal high | Signal error |
| B1C63 | Passenger's heater current abnormal low | Signal error |
| B1C68 | Driver's heater not heating | Signal error |
| B1C69 | Passenger's heater not heating | Signal error |
| B1C70 | Driver's main heater switch failure | Signal error |
| B1C71 | Passenger's main heater switch failure | Signal error |
| U1064 | Seat heater control unit lost communication with climate control unit (front seat) | Loss of communication |
| DTC | Description | DTC type |
|---|---|---|
| U1280 | Seat heater control unit communication bus line error (BUS-OFF) (front seat) | Loss of communication |
Climate Control Unit
| DTC | Detection | DTC Type |
|---|---|---|
| B1213 | An open in the rear evaporator temperature sensor circuit | Signal error |
| B1214 | A short in the rear evaporator temperature sensor circuit | Signal error |
| B1220 | A short in the recirculation control motor circuit | Signal error |
| B1221 | An open in the rear mode control motor circuit | Signal error |
| B1222 | A short in the rear mode control motor circuit | Signal error |
| B1223 | A problem in the rear blower 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 (front) | Signal error |
| B1232 | A short in the evaporator temperature sensor circuit (front) | 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 |
| B123F | Automatic lighting control unit/sunlight sensor error | Internal error |
| B1241 | A problem in the blower motor circuit (front) | Signal error |
| B1244 | An open in the rear air mix control motor circuit | Signal error |
| B1245 | A short in the rear air mix control motor circuit | Signal error |
| B1246 | A problem in the rear air mix control motor circuit, linkage, door, or motor | Signal error |
| B1248 | A problem in the rear mode control motor circuit, linkage, door, or motor | Signal error |
| B2964 | Climate control unit lost communication with Front PANEL | Loss of communication |
| B2966 | Climate control unit lost communication with Rear PANEL | Loss of communication |
| B2967 | An open in the humidity sensor circuit | Signal error |
| B2968 | A short in the humidity sensor circuit | Signal error |
| B2969 | An open in the mode control motor A circuit (front) | Signal error |
| B2970 | A short in the mode control motor A circuit (front) | Signal error |
| B2971 | A problem in the mode control motor A circuit, linkage, door, or motor (front) | Signal error |
| B2972 | An open in the mode control motor B circuit (front) | Signal error |
| B2973 | A short in the mode control motor B circuit (front) | Signal error |
| B2974 | A problem in the mode control motor B circuit, linkage, door, or motor (front) | Signal error |
| B2979 | An open in the A/C pressure sensor circuit | Signal error |
| B2980 | A short in the A/C pressure sensor circuit | Signal error |
| DTC | Detection | DTC Type |
|---|---|---|
| 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 |
| U0180 | Climate Control Unit Lost communication with automatic lighting control unit-sensor | Loss of communication |
| U1280 | Communication bus line error (BUS-OFF) | Loss of communication |
| U1281 | Climate Control Unit Lost Communication with MICU (climate control unit) | Loss of communication |
| U128D | Climate Control Unit Lost communication with gauge control module (climate control unit) | Loss of communication |
| U1290 | Climate Control Unit Lost Communication With Seat Heater Control Unit (front) | Loss of communication |
| U129B | Climate Control Unit Lost Communication With Seat Heater Control Unit (rear seat) | Loss of communication |
HVAC Control Unit
| DTC | Detection | DTC Type |
|---|---|---|
| B1220 | A short in the recirculation control motor circuit | Signal error |
| B1221 | An open in the rear mode control motor circuit | Signal error |
| B1222 | A short in the rear mode control motor circuit | Signal error |
| B1223 | A problem in the rear blower motor circuit | Signal error |
| B1231 | An open in the evaporator temperature sensor circuit (front) | Signal error |
| B1232 | A short in the evaporator temperature sensor circuit (front) | Signal error |
| B1233 | An open in the air mix control motor circuit (front) | Signal error |
| B1234 | A short in the air mix control motor circuit (front) | Signal error |
| B1235 | A problem in the air mix control motor circuit, linkage, door, or motor (front) | Signal error |
| B1241 | A problem in the blower motor circuit (front) | Signal error |
| B1244 | An open in the rear air mix control motor circuit | Signal error |
| B1245 | A short in the rear air mix control motor circuit | Signal error |
| B1246 | A problem in the rear air mix control motor circuit, linkage, door, or motor | Signal error |
| B1248 | A problem in the rear mode control motor circuit, linkage, door, or motor | Signal error |
| B2964 | Climate control unit lost communication with Front PANEL | Signal error |
| B2969 | An open in the mode control motor A circuit (front) | Signal error |
| B2970 | A short in the mode control motor A circuit (front) | Signal error |
| B2971 | A problem in the mode control motor A circuit, linkage, door, or motor (front) | Signal error |
| B2972 | An open in the mode control motor B circuit (front) | Signal error |
| B2973 | A short in the mode control motor B circuit (front) | Signal error |
| B2974 | A problem in the mode control motor B circuit, linkage, door, or motor (front) | Signal error |
| B2979 | An open in the A/C pressure sensor circuit | Signal error |
| B2980 | A short in the A/C pressure sensor 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 | Climate Control Unit Lost Communication with MICU (HVAC control unit) | Loss of communication |
| DTC | Detection | DTC Type |
|---|---|---|
| U128D | Climate Control Unit Lost communication with gauge control module (HVAC control unit) | Loss of communication |
Left Side BSI Radar Unit
| DTC | Description | DTC Type |
|---|---|---|
| B18A1 | Left Side BSI Radar Unit Internal Circuit Error | Internal error |
| B18A5 | Left Side BSI Radar Unit Temperature High | Signal error |
| B18B4 | Left Side BSI Radar Unit Dirty | Signal error |
| B18B8 | Left Side BSI Radar Unit Azimuth Off Alignment | Signal error |
| B18BA | Different Version in the Left and Right Side BSI Radar Unit | Signal error |
| B18C5 | Short to GND in the Left Side BSI Radar Unit Indicator Circuit | Signal error |
| B18C6 | Short to Power in the Left Side BSI Radar Unit Indicator Circuit | Signal error |
| B18C7 | Open in the Left Side BSI Radar Unit Indicator Circuit | Signal error |
| B18DB | Left Side BSI Radar Unit Received The Audio/Navigation Unit Failure Information | Signal error |
| B18EA | Left Side BSI Radar Unit Received PCM (A/T System) Failure Information | Signal error |
| U1280 | Communication Bus Line Error (Bus-Off) | Loss of communication |
| U1281 | Left Side BSI Radar Unit Lost Communication With MICU | Loss of communication |
| U128D | Left Side BSI Radar Unit Lost Communication With Gauge Control Module | Loss of communication |
| U1297 | Left Side BSI Radar Unit Lost Communication With Right Side BSI Radar Unit | Loss of communication |
Right Side BSI Radar Unit
| DTC | Description | DTC Type |
|---|---|---|
| B1E51 | Right Side BSI Radar Unit Internal Circuit Error | Internal error |
| B1E55 | Right Side BSI Radar Unit Temperature High | Signal error |
| B1E64 | Right Side BSI Radar Unit Dirty | Signal error |
| B1E68 | Right Side BSI Radar Unit Azimuth Off Alignment | Signal error |
| B1E6A | Different Version in the Left and Right Side BSI Radar Unit | Signal error |
| B1E75 | Short to GND in the Right Side BSI Radar Unit Indicator Circuit | Signal error |
| B1E76 | Short to Power in the Right Side BSI Radar Unit Indicator Circuit | Signal error |
| B1E77 | Open in the Right Side BSI Radar Unit Indicator Circuit | Signal error |
| B1E9A | Right Side BSI Radar Unit Received PCM (A/T System) Failure Information | Signal error |
| U1280 | Communication Bus Line Error (Bus-Off) | Loss of communication |
| U1281 | Right Side BSI Radar Unit Lost Communication With MICU | Loss of communication |
| U128D | Right Side BSI Radar Unit Lost Communication With Gauge Control Module | Loss of communication |
| U128F | Right Side BSI Radar Unit Lost Communication With Left Side BSI Radar Unit | Loss of communication |