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:
- Battery voltage DTCs
- 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 |
| 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 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 | B-CAN 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 ACC unit/multi purpose camera 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 |
| U0131 | Gauge control module lost communication with EPS unit | Loss of communication |
| U0151 | Gauge control module lost communication with SRS unit | Loss of communication |
| U0230 | Gauge control module lost communication with PTG | Loss of communication |
| U1100 | Gauge control module lost communication with LKAS/multi purpose camera 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 | Reprograming 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 | Loss of communication |
| 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 (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 |
| B2969 | Climate control unit lost communication with MICU (WIPSW message) | Loss of communication |
| 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 |
| C0 | Climate control unit internal error | Signal error |
| U1280 | Communication bus line error (BUS-OFF) | 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 |
| 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 |
| 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 |
Automatic Lighting/Rain Sensor
| DTC | Description | DTC type |
|---|---|---|
| B2352 | Rain light sensor unit internal error (EEPROM error) | Internal error |
| B2375 | Rain sensing 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 unit lost communication with MICU | Loss of communication |
| U128D | Rain light sensor unit lost communication with gauge control module | Loss of communication |
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 |
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 |
| B1661 | Middle interior antenna circuit short | Signal error |
| B1662 | Middle interior antenna circuit open | Signal error |
| B1663 | Rear interior LF antenna circuit Short | Signal error |
| B1664 | Rear interior LF antenna circuit open | Signal error |
| U0199 | Keyless access - P/W communication error | Loss of communication |
| U1280 | B-CAN 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 |
*: With electric steering lock
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 |
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*2 | Electric steering lock switch C/D monitor circuit failure | Internal error |
| B12C7*2 | 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*2 | Electric steering lock switch internal error | Internal error |
| B12E1*2 | Electric steering lock motor internal error | Internal error |
| B12E2*2 | Electric steering lock low level failure of MTRCUT1 | Signal error |
| B12E3*2 | Electric steering lock high level failure of MTRCUT1 | Signal error |
| B12E4*2 | Electric steering lock high level failure of MTRCUT2 | Signal error |
| B12E5*1 | Electric steering lock is connected | Signal error |
| B12F0*2 | Power control unit lost communication with electric steering lock | Loss of communication |
| B12F2 | Power control unit lost communication with keyless access control unit | 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 |
*1: Without steering lock*2: With steering lock
Power Seat Control Unit
| DTC | Description | DTC type |
|---|---|---|
| B1802 | Power seat 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 |
| 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 |
| 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 | Lost communication with MICU (MICU frame) | Loss of communication |
| U128D | Lost communication with gauge control module (VSP/NE frame) | Loss of communication |
Power Tailgate Control Unit
| DTC | Description | DTC type |
|---|---|---|
| B1352 | Power tailgate control unit internal error (EEPROM error) | Internal error |
| B1375 | Driver's side PTG switch circuit malfunction | Signal error |
| B1376 | Tailgate outer handle switch circuit malfunction | Signal error |
| B1377 | Power tailgate inner switch circuit malfunction | Signal error |
| B1378 | Power tailgate right touch/pinch sensor circuit malfunction | Signal error |
| B1379 | Power tailgate left touch/pinch sensor circuit malfunction | Signal error |
| B1380 | Tailgate closer unit neutral switch circuit malfunction | Signal error |
| B1381 | Tailgate closer unit release switch circuit malfunction | Signal error |
| B1382 | Tailgate closer unit full latch switch circuit malfunction | Signal error |
| B1383 | Tailgate closer unit ratchet switch circuit malfunction | Signal error |
| B1384 | Tailgate closer unit half latch switch circuit malfunction | Signal error |
| B1386 | Power tailgate sensor pulse A circuit malfunction | Signal error |
| B1387 | Power tailgate sensor pulse B circuit malfunction | Signal error |
| B1388 | Power tailgate drive motor circuit malfunction | Signal error |
| B1389 | Power tailgate motor clutch circuit malfunction | Signal error |
| B1390 | Power tailgate closer motor function error | Signal error |
| U0199 | Lost communication with P/W (DRLOCKSW, KLDRLOCK frame) | Loss of communication |
| U1280 | Communication bus line error (a bus OFF state is detected by power tailgate ECU) | Loss of communication |
| U1281 | Lost communication with MICU (MICU frame) | Loss of communication |
| U128D | Power tailgate control unit lost communication with gauge control module | Loss of communication |