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 RDX BaseFACTORY OEM SERVICE PROCEDURE
Power Distribution Module DTCS
POWER DISTRIBUTION MODULE
| DTC | Description |
|---|---|
| B1052 | Relay control module (power distribution module) internal (EEPROM) error |
| B1075 | Headlight switch malfunction |
| B108A | Right side parking light circuit shorted |
| B108B | Left side parking light circuit shorted |
| B108C | Right side headlight low beam circuit shorted |
| B108D | Left side headlight low beam circuit shorted |
| B1090 | Illumination circuit shorted |
| B1091 | DRL circuit shorted |
| B1092 | Interior light cut circuit shorted |
| B1093 | Front fog light control current overload failure |
| B26A0 | Front heat seat control current overload failure |
| B26A2 | AC clutch control current overload failure |
| B26A3 | Front blower current overload failure |
| B26A4 | Rear blower current overload failure |
| B26A9 | Fuel pump control current overload failure |
| B26AB | Ignition coil control current overload failure |
| B26AE | Horn current overload failure |
| U1280 | B-CAN communication bus line error (BUS-OFF) |
| U1291 | Semiconductor fuse relay module lost communication with relay 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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