Loss of Communication DTC cross-reference chart
WARNING: This page is about a different car, the 2009 Acura MDX, 2008 Acura MDX, and 2007 Acura MDX. However, it is still accessible from the selected car via links, so may be relevant.
When an electronic control unit (ECU) is unable to communicate with the other ECUs on the CAN circuit, the other control units will set loss of communication DTCs. Use this chart to find the control unit that is not communicating.
- Find the Transmitting Control Unit that is in the same row as all of the loss of communication DTCs retrieved.
- Do the input test for the transmitting control unit.
BUS OFF and Internal Error Codes
BUS OFF AND INTERNAL ERROR CODES REFERENCE
| DTC type | Related Unit | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| MICU | Rear MICU | Relay Control Module | Driver's MPCS Unit | Combination Switch Control Unit | Gauge Control Module | Climate Control Unit | Immobilizes Keyless Control unit | Power Tailgate Control Unit | Power Seat Control Unit | Hands FreeLink Control Unit | AcuraLink Control Unit (XM Receiver) | |
| BUS OFF | B1000 | B1950 | B1050 | B2150 | B1250 | B1150 | B1200 | B1900 | B1350 | B1800 | B1750 | B2200 |
| ECU (CPU) Error | B1001 | B1051 | B2209 | |||||||||
| ECU (EEPROM) Error | B1002 | B1052 | B2152 | B1252 | B1152 | B1202 | B1352 | B1802 | B1792 | |||
BUS OFF AND INTERNAL ERROR CODES REFERENCE
| Transmitting Control Unit | Message | Receiving Unit/Loss of Communication DTC | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| MICU | Rear MICU | Relay Control Module | Driver's MPCS Unit | Combination Switch Control Unit | Gauge Control Unit | Climate Control Unit | immobilizer-Keyless Control Unit | Power Tailgate Control Unit | Power Seat Control Unit Hands | FreeLink Control Unit | AcuraLink Control Unit (XM Receiver) | Navigation Unit | ||
| MICU | ALARM | B1056 | ||||||||||||
| MICU | B1955 | B1055 | B2155 | B1255 | B1157 | B1355 | B1806 | |||||||
| DOORSW | B1057 | B2161 | B1159 | B1811 | ||||||||||
| MIRRORSW | B2156 | B1810 | ||||||||||||
| AUTOLT | B1180 | |||||||||||||
| RM | B1188 | |||||||||||||
| Rear MICU | RJC | B1012 | ||||||||||||
| Relay Control Module | RM | B1005 | B1959 | B2162 | B1158 | B2970 | ||||||||
| Driver's MPCS Unit | DRLOCKSW | B1015 | B1065 | B1182 | B1905 | B1356 | ||||||||
| ASLOCKSW | B1013 | B1358 | ||||||||||||
| MENSW | B1812 | |||||||||||||
| Combination Switch Control Unit | HLSW | B1007 | B1957 | B1062 | B1155 | |||||||||
| WIPSW | B1958 | B1063 | B1156 | B2969 | ||||||||||
| Gauge Control Module | VSP/NE | B1011 | B1060 | B2160 | B1205 | B1357 | B1805 | B1408 | ||||||
| AT | B1956 | B1061 | B1906 | B1359 | B1808 | |||||||||
| ENGTEMP | B1206 | |||||||||||||
| ILLUMI | B2157 | B1207 | ||||||||||||
| SRS | B1032 | |||||||||||||
| VEHINFO | B1786 | |||||||||||||
| Power Tailgate Control Unit | PTG | B1162 | ||||||||||||
| PCM | ENG | B1168 | ||||||||||||
| AT | B1169 | |||||||||||||
| VSA Modulator-Control Unit | VSA | B1170 | ||||||||||||
| TPMS Control Unit | TPMS | B1173 | ||||||||||||
| SRS Control | SRS | B1187 | ||||||||||||
| Active Damper Control Unit | ADS | B1189 | ||||||||||||
| Navigation Unit | B2981 | |||||||||||||
| AcuraLink Control Unit | B2208 | B2207 | ||||||||||||
| Hands Free Link Control Unit | ||||||||||||||
| Audio Unit | B2991 | |||||||||||||