Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Loss of Communication DTC cross-reference chart
When an ECU on the CAN circuit is unable to communicate with the other ECUs on the B-CAN and F-CAN circuits, the other control units will set loss of communication DTCs. Use this chart to find the control unit that is not communicating with the other control units on the CAN circuit.
- 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
| DTC type | Related Unit | ||||
|---|---|---|---|---|---|
| MICU | Gauge Control Module | Climate Control Unit | Immobilizer-Keyless Control Unit | HandsFreeLink Control Unit | |
| BUS OFF | B1000 | B1150 | B1200 | B1900 | B1750 (2010) U1280 (2011) |
| ECU (EEPROM) Error | B1002 | B1152 | |||
| Transmitting Control Unit | Message | Receiving Unit/Loss of Communication DTC | ||||
|---|---|---|---|---|---|---|
| MICU | Gauge Control Module | Climate Control Unit | Immobilizer-Keyless Control Unit | HandsFreeLink Control Unit | ||
| MICU | RM | |||||
| HLSW | B1155 | |||||
| WIPSW | B1156 | |||||
| MICU | B1157 | |||||
| DOORSW | B1159 | |||||
| DRLOCKSW | B1160 | B1905 | ||||
| Gauge Control Module | VSP/NE | B1011 | B1205 | |||
| A/T | B1906 | |||||
| ENGTEMP | B1206 | |||||
| ILLUMI | B1207 | |||||
| PCM | ENG | B1168 | ||||
| A/T | B1169 | |||||
| VSA Modulator-Control Unit | VSA/ABS | B1170 | ||||
| EPS Control Unit | EPS | |||||
| Motor Control Module (MCM) | BATT | B1185 | ||||
| SRS unit | SRS | B1187 | ||||
| TPMS control unit | TPMS | B1173 | ||||
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.