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.
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HOMESERVICE MANUALSACURA2018RLX BASEREPAIR AND DIAGNOSIS (SINGLE PAGE)QUICK LOOKUPSDTC INDEX (EXCEPT HYBRID)BODY CONTROL SYSTEM DTCSRELAY CONTROL MODULE
2018 Acura RLX Base
Relay Control Module
2018 Acura RLX BaseSECTION Relay Control Module
DIAGNOSTIC TROUBLE CODE (DTC) INDENTIFICATION
| DTC | Description | DTC type |
|---|---|---|
| B1052 | Relay control module internal (EEPROM) error | Internal error |
| B1075 | Headlight switch malfunction | Signal error |
| B1080 | Power supply circuit (IG1 line) input error for relay control module and MICU | Signal error |
| B1081 | Left side LED headlight malfunction | Signal error |
| B1082 | Left side LED headlight circuit malfunction | Signal error |
| B1083 | Right side LED headlight malfunction | Signal error |
| B1084 | Right side LED headlight circuit malfunction | Signal error |
| U1280 | B-CAN communication bus line error (BUS-OFF) | Loss of communication |
| U1281 | Relay control module lost communication with MICU (MICU frame) | Loss of communication |
| U128D | Relay control module lost communication with gauge control module (VSP/NE frame) | Loss of communication |
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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.