DTC Troubleshooting Index
WARNING: This page is about a different car, the 2008 Acura TL and 2007 Acura TL. However, it is still accessible from the selected car via links, so may be relevant.
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 (beginning with the lowest number first; for example, if B1006 and B1059 are retrieved, troubleshoot B1006 first).
- Signal error DTCs
DTC TROUBLESHOOTING CHART
| DTC | Description | ECU | DTC type |
|---|---|---|---|
| B1000 | Communication bus line error (BUS Off) | MICU | Loss of Communication |
| B1001 | MICU internal error (CPU error) | MICU | Internal Error |
| B1002 | MICU internal error (EEPROM error) | MICU | Internal Error |
| B1005 | MICU lost communication with Relay Control Module | MICU | Loss of Communication |
| B1006 | MICU lost communication with Door Multiplex Control Unit (door lock switch message) | MICU | Loss of Communication |
| B1007 | MICU lost communication with Combination Switch Control Unit (headlight switch message) | MICU | Loss of Communication |
| B1008 | MICU lost communication with Gauge Control Module (A/T message) | MICU | Loss of Communication |
| B1010 | MICU lost communication with Door Multiplex Control Unit (panic message) | MICU | Loss of Communication |
| B1011 | MICU lost communication with Gauge Control Module (VSP/NE message) | MICU | Loss of Communication |
| B1026 | Passenger's door lock switch signal error | MICU | Signal Error |
| B1032 | MICU lost communication with Gauge Control Module (CDS message) | MICU | Loss of Communication |
| B1050 | Communication bus line error (BUS Off) | Relay Control Module | Loss of Communication |
| B1055 | Relay Control Module lost communication with MICU | Relay Control Module | Loss of Communication |
| B1056 | Relay Control Module lost communication with MICU (alarm message) | Relay Control Module | Loss of Communication |
| B1057 | Relay Control Module lost communication with MICU (door switch message) | Relay Control Module | Loss of Communication |
| B1058 | Relay Control Module lost communication with Door Multiplex Control Unit (door lock switch message) | Relay Control Module | Loss of Communication |
| B1059 | Relay Control Module lost communication with Door Multiplex Control Unit (panic message) | Relay Control Module | Loss of Communication |
| B1060 | Relay Control Module lost communication with Gauge Control Module (VSP/NE message) | Relay Control Module | Loss of Communication |
| B1061 | Relay Control Module lost communication with Gauge Control Module (A/T message) | Relay Control Module | Loss of Communication |
| B1062 | Relay Control Module lost communication with Combination Switch Control Unit (headlight switch message) | Relay Control Module | Loss of Communication |
| B1063 | Relay Control Module lost communication with Combination Switch Control Unit (wiper switch message) | Relay Control Module | Loss of Communication |
| B1075 | Headlight switch signal error | Relay Control Module | Signal Error |
| B1076 | Windshield wiper signal error | Relay Control Module | Signal Error |
| B1077 | Windshield wiper (Park) signal error | Relay Control Module | Signal Error |
| B1080 | Power supply circuit (IG1 line) input error for Relay Control Module and MICU | Relay Control Module | Battery voltage |
| B1100 | Communication circuit error (BUS Off) | Door Multiplex Control Unit | Loss of Communication |
| B1102 | Door Multiplex Control Unit internal error | Door Multiplex Control Unit | Internal Error |
| B1125 | Driver's power window motor A pulse malfunction | Door Multiplex Control Unit | Signal Error |
| B1126 | Driver's power window motor B pulse malfunction | Door Multiplex Control Unit | Signal Error |
| B1127 | Driver's door key cylinder switch malfunction | Door Multiplex Control Unit | Signal Error |
| B1128 | Driver's door lock switch signal error | Door Multiplex Control Unit | Signal Error |
| B1129 | Driver's door lock knob switch signal error | Door Multiplex Control Unit | Signal Error |
| B1130 | Front passenger's power window motor A pulse malfunction | Door Multiplex Control Unit | Signal Error |
| B1131 | Front passenger's power window motor B pulse malfunction | Door Multiplex Control Unit | Signal Error |
| B1140 | Driver's power window position detect circuit malfunction | Door Multiplex Control Unit | Signal Error |
| B1141 | Door Multiplex Control Unit lost communication with front passenger's power window switch (UART line short) | Door Multiplex Control Unit | Loss of Communication |
| B1142 | Door Multiplex Control Unit lost communication with front passenger's power window switch (UART line open) | Door Multiplex Control Unit | Loss of Communication |
| B1143 | Door MPCS internal error (EEPROM error) | Door Multiplex Control Unit | Signal Error |
| B1144 | Abnormal signal from keyless receiver unit | Door Multiplex Control Unit | Signal Error |
| B1145 | Front passenger's power window position detect circuit error | Door Multiplex Control Unit | Signal Error |
| B1146 | Front passenger's power window switch malfunction | Door Multiplex Control Unit | Signal Error |
| B1150 | Communication bus line error (BUS Off) | Gauge Control Module | Loss of Communication |
| B1152 | Gauge Control Module EEPROM error | Gauge Control Module | Internal Error |
| B1155 | Gauge Control Module lost communication with Combination Switch Control Unit (headlight switch message) | Gauge Control Module | Loss of Communication |
| B1156 | Gauge Control Module lost communication with Combination Switch Control Unit (wiper switch message) | Gauge Control Module | Loss of Communication |
| B1157 | Gauge Control Module lost communication with MICU | Gauge Control Module | Loss of Communication |
| B1158 | Gauge Control Module lost communication with Relay Control Module | Gauge Control Module | Loss of Communication |
| B1159 | Gauge Control Module lost communication with MICU (door switch message) | Gauge Control Module | Loss of Communication |
| B1160 | Gauge Control Module lost communication with Door Multiplex Control Unit (door lock switch message) | Gauge Control Module | Loss of Communication |
| B1168 | Gauge Control Module lost communication with ECM/PCM (engine messages) | Gauge Control Module | Loss of Communication |
| B1169 | Gauge Control Module lost communication with PCM (A/T messages) | Gauge Control Module | Loss of Communication |
| B1170 | Gauge Control Module lost communication with VSA modulator-control unit (VSA messages) | Gauge Control Module | Loss of Communication |
| B1173 | Gauge Control Module lost communication with TPMS control unit (TPMS messages) | Gauge Control Module | Loss of Communication |
| B1175 | Fuel level sensor (fuel gauge sending unit) signal input error | Gauge Control Module | Signal Error |
| B1177 | Abnormal battery voltage (7.5 V) | Gauge Control Module | Battery voltage |
| B1178 | F-CAN communication line error | Gauge Control Module | Loss of Communication |
| B1187 | Gauge Control Module lost communication with SRS unit (SRS messages) | Gauge Control Module | Loss of Communication |
| B1202 | Climate Control Unit internal error | Climate Control Unit | Internal Error |
| B1225 | An open in the in-car temperature sensor circuit | Climate Control Unit | Signal Error |
| B1226 | A short in the in-car temperature sensor circuit | Climate Control Unit | Signal Error |
| B1227 | An open in the outside air temperature sensor circuit | Climate Control Unit | Signal Error |
| B1228 | A short in the outside air temperature sensor circuit | Climate Control Unit | Signal Error |
| B1229 | An open in the sunlight sensor circuit | Climate Control Unit | Signal Error |
| B1230 | A short in the sunlight sensor circuit | Climate Control Unit | Signal Error |
| B1231 | An open in the evaporator temperature sensor circuit | Climate Control Unit | Signal Error |
| B1232 | A short in the evaporator temperature sensor circuit | Climate Control Unit | Signal Error |
| B1233 | An open in the driver's air mix control motor circuit | Climate Control Unit | Signal Error |
| B1234 | A short in the driver's air mix control motor circuit | Climate Control Unit | Signal Error |
| B1235 | A problem in the driver's air mix control linkage, door, or motor | Climate Control Unit | Signal Error |
| B1236 | An open in the passenger's air mix control motor circuit | Climate Control Unit | Signal Error |
| B1237 | A short in the passenger's air mix control motor circuit | Climate Control Unit | Signal Error |
| B1238 | A problem in the passenger's air mix control linkage, door, or motor | Climate Control Unit | Signal Error |
| B1239 | An open or short in the driver's mode control motor circuit | Climate Control Unit | Signal Error |
| B1240 | A problem in the driver's mode control linkage, doors, or motor | Climate Control Unit | Signal Error |
| B1241 | A problem in the blower motor circuit | Climate Control Unit | Signal Error |
| B1242 | An open or short in the passenger's mode control motor circuit | Climate Control Unit | Signal Error |
| B1243 | A problem in the passenger's mode control linkage, doors, or motor | Climate Control Unit | Signal Error |
| B1250 | Communication bus line error (BUS Off) | Combination Switch Control Unit | Loss of Communication |
| B1255 | Combination Switch Control Unit lost communication with MICU | Combination Switch Control Unit | Loss of Communication |
| B1275 | Headlight switch OFF position circuit malfunction | Combination Switch Control Unit | Signal Error |
| B1276 | Headlight switch parking (SMALL) position circuit malfunction | Combination Switch Control Unit | Signal Error |
| B1277 | Headlight switch AUTO position circuit malfunction | Combination Switch Control Unit | Signal Error |
| B1278 | Headlight switch ON position circuit malfunction | Combination Switch Control Unit | Signal Error |
| B1279 | Headlight switch dimmer position circuit malfunction | Combination Switch Control Unit | Signal Error |
| B1280 | Turn signal switch circuit malfunction | Combination Switch Control Unit | Signal Error |
| B1281 | Windshield wiper switch MIST position circuit malfunction | Combination Switch Control Unit | Signal Error |
| B1282 | Windshield wiper switch INT (AUTO) position circuit malfunction | Combination Switch Control Unit | Signal Error |
| B1283 | Windshield wiper switch LOW position circuit malfunction | Combination Switch Control Unit | Signal Error |
| B1284 | Windshield wiper switch HIGH position circuit malfunction | Combination Switch Control Unit | Signal Error |
| B1550 | Communication bus line error (BUS Off) | Automatic Lighting Control Unit | Loss off communication |
| B1555 | Automatic Lighting Control Unit lost communication with Combination Switch Control Unit (AUTOLT message) | Automatic Lighting Control Unit | Loss off communication |
| B1556 | Automatic Lighting Control Unit lost communication with MICU (MICU message) | Automatic Lighting Control Unit | Loss off communication |
| B1700 | Communication bus line error (BUS Off) | Display panel control unit | Loss of Communication |
| B1701 | Display panel control unit internal error (CPU error) | Display panel control unit | Internal Error |
| B1702 | Display panel control unit internal error (EEPROM error) | Display panel control unit | Internal Error |
| B1705 | Display panel control unit lost communication with Gauge Control Module (engine coolant temperature message) | Display panel-control unit | Loss of Communication |
| B1706 | Display panel control unit lost communication with Gauge Control Module (VSP/NE message) | Display panel control unit | Loss of Communication |
| B1725 | Display Panel Control Unit temperature is too high | Display panel control unit | Loss of Communication |
| B1726 | Display Panel Control Unit lost communication with Climate Control Unit | Display panel control unit | Loss of Communication |
| B1750 | Communication bus line error (BUS Off) | HandsFreeLink Control Unit | Loss of Communication |
| B1751 | HandsFreeLink Control Unit CPU Error (Anomalous CPU) | HandsFreeLink Control Unit | Internal Error |
| B1775 | Microphone Input/Output Shorted to Power/ Open | HandsFreeLink Control Unit | Signal Error |
| B1776 | Microphone Input/Output Shorted to Ground/Open | HandsFreeLink Control Unit | Signal Error |
| B1779 | HFL-Voice Control Switch (Pick Up/Hang Up Switch) Open | HandsFreeLink Control Unit | Signal Error |
| B1780 | HFL-Voice Control Switch (Pick Up/Hang Up Switch) Short | HandsFreeLink Control Unit | Signal Error |
| B1792 | HandsFreeLink Control Unit Internal Error | HandsFreeLink Control Unit | Signal Error |
| B1800 | Communication bus line error (BUS Off) | Power Seat Control Unit | Loss of Communication |
| B1802 | Power Seat Control Unit internal error (EEPROM error) | Power Seat Control Unit | Internal Error |
| B1805 | Power Seat Control Unit lost communication with Gauge Control Module (VSP/NE message) | Power Seat Control Unit | Loss of Communication |
| B1806 | Power Seat Control Unit lost communication with MICU (MICU message) | Power Seat Control Unit | Loss of Communication |
| B1807 | Power Seat Control Unit lost communication with MICU (door switch message) | Power Seat Control Unit | Loss of Communication |
| B1808 | Power Seat Control Unit lost communication with Gauge Control Module (A/T message) | Power Seat Control Unit | Loss of Communication |
| B1809 | Power Seat Control Unit lost communication with Door Multiplex Control Unit (memory switch message) | Power Seat Control Unit | Loss of Communication |
| B1825 | Power seat slide motor pulse error | Power Seat Control Unit | Signal Error |
| B1826 | Power seat front up-down motor pulse error | Power Seat Control Unit | Signal Error |
| B1827 | Power seat rear up-down motor pulse error | Power Seat Control Unit | Signal Error |
| B1828 | Power seat recline motor pulse error | Power Seat Control Unit | Signal Error |
| B1829 | A/TP signal and VSS signal mismatch | Power Seat Control Unit | Signal Error |
| B1830 | Right mirror horizontal sensor malfunction | Power Seat Control Unit | Signal Error |
| B1831 | Right mirror vertical sensor malfunction | Power Seat Control Unit | Signal Error |
| B1832 | Left mirror horizontal sensor malfunction | Power Seat Control Unit | Signal Error |
| B1833 | Left mirror vertical sensor malfunction | Power Seat Control Unit | Signal Error |
| B1834 | M/T harness poor ground | Power Seat Control Unit | Signal Error |
| B1837 | Power seat position memory recall error | Power Seat Control Unit | Signal Error |
| B1843 | Power Seat Control Unit lost communication with other units (UART communication error 2) | Power Seat Control Unit | Loss of Communication |
| B2200 | B-CAN BUS Off | AcuraLink Control Unit | Loss of Communication |
| B2204 | B-CAN communication line error | AcuraLink Control Unit | Loss of Communication |
| B2205 | F-CAN communication line error | AcuraLink Control Unit | Loss of Communication |
| B2207 | Navigation unit lost communication with AcuraLink control unit (XM receiver) | AcuraLink Control Unit | Loss of Communication |
| B2208 | HandsFreeLink control unit communication with AcuraLink control unit (XM receiver) | AcuraLink Control Unit | Loss of Communication |
| B2209 | AcuraLink control unit (XM receiver) internal error | AcuraLink Control Unit | Internal Error |
| B2240 | XM antenna error | AcuraLink Control Unit | Loss of Communication |