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.
2021 Acura TLX BaseFACTORY OEM SERVICE PROCEDURE
Body Control Module
BCM DTCS
| DTC | Description |
|---|---|
| B1002 | BCM (body control module) internal error (EEPROM error) |
| B1003 | BCM (body control module) update error |
| B1036 | IG1 power supply circuit malfunction |
| B1038 | IMMOBILIZER F-CAN authentication ID not received |
| B1039 | IMMOBILIZER F-CAN authentication ID unmatch |
| B1040 | BCM (body control module) lost communication with front wiper |
| B1041 | Front wiper motor malfunction |
| B1042 | Front wiper security line error |
| B1043 | Front wiper unit internal error (EEPROM error) |
| B1085 | Headlight low light source abnormality |
| B1275 | Headlight OFF position circuit malfunction |
| B1276 | Headlight switch parking (small) position circuit malfunction |
| B1277 | Headlight AUTO position circuit malfunction |
| B1278 | Headlight ON position circuit malfunction |
| B1279 | Dimmer switch circuit malfunction |
| B1280 | Turn signal switch circuit malfunction |
| B1281 | Front wiper MIST position circuit malfunction |
| B1282 | Front wiper INT (AUTO) position circuit malfunction |
| B1283 | Front wiper LOW position circuit malfunction |
| B1284 | Front wiper HIGH position circuit malfunction |
| DTC B2352 | Rain light sensor unit internal error (EEPROM error) |
| B2375 | Rain sensing malfunction in rain/light sensor |
| B1276 | Light sensing malfunction in rain/light sensor |
| U0073 | F-CAN communication bus line error (BUS-OFF) |
| U0100 | BCM (body control module) lost communication with ECM/PCM |
| U0122 | BCM (body control module) lost communication with VSA/ABS |
| U1280 | B-CAN communication bus line error (BUS-OFF) |
| U128D | BCM (body control module) lost communication with gauge control module |
Factory Service Tools
Use the Manual With the Right Hardware
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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.
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