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.
2023 Acura MDX BaseFACTORY OEM SERVICE PROCEDURE
Relay Control Module
| DTC | Description |
|---|---|
| DTC Troubleshooting: B108A, B108B, B108C, B108D, B108E, B108F, B1090, B1091, B1092 | Interior Light Cut Circuit Shorted |
| DTC Troubleshooting: U1280(Relay Control Module) | B-CAN communication bus line error (BUS-OFF) |
| DTC Troubleshooting: U1281(Relay Control Module) | Relay control module lost communication with MICU (MICU frame) |
| DTC Troubleshooting: U128D(Relay Control Module) | Relay control module lost communication with gauge control module (VSP/NE frame) |
Factory Service Tools
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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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