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
AWD System DTCS
AWD SYSTEM DIAGNOSTIC TROUBLE CODE (DTC) INDENTIFICATION
| DTC | Detection Item | Troubleshooting | AWD Indicator | Note |
|---|---|---|---|---|
| C0051-62 (16-03) | Steering Angle Sensor Neutral Position Incorrect | TRS | ON | |
| C0051-96 (77-06) | Invalid Data Received From Steering Angle Sensor | TRS | ON | |
| C0061-62 (12-01) | Lateral Acceleration Sensor Malfunction | TRS | ON | |
| C0061-62 (12-02) | Lateral Acceleration Sensor Malfunction | TRS | ON | |
| C0061-62 (12-03) | Lateral Acceleration Sensor Malfunction | TRS | ON | |
| C0061-96 (77-05) | Invalid Data Received From Lateral Acceleration/Longitudinal Acceleration/Yaw Rate Sensor | TRS | ON | |
| C0062-62 (15-01) | Longitudinal Acceleration Sensor Malfunction | TRS | ON | |
| C0062-62 (15-02) | Longitudinal Acceleration Sensor Malfunction | TRS | ON | |
| C0063-62 (33-02) | Yaw Rate Sensor Malfunction | TRS | ON | |
| C0063-62 (33-03) | Yaw Rate Sensor Malfunction | TRS | ON | |
| C1841-11 (42-02) | Rear Differential Fluid Temperature Sensor Circuit Low Voltage | TRS | ON | |
| C1841-13 (42-01) | Rear Differential Fluid Temperature Sensor Circuit High Voltage | TRS | ON | |
| C1841-27 (43-01) | Rear Differential Fluid Temperature Sensor Circuit Range/Performance Problem | TRS | ON | |
| C1843-12 (47-01) | Left Rear Differential Fluid Pressure Sensor Circuit High Voltage | TRS | ON | |
| C1843-14 (47-02) | Left Rear Differential Fluid Pressure Sensor Circuit Low Voltage | TRS | ON | |
| C1843-62 (47-03) | Left Rear Differential Fluid Pressure Deviation | TRS | ON | |
| C1844-12 (48-01) | Right Rear Differential Fluid Pressure Sensor Circuit High Voltage | TRS | ON | |
| C1844-14 (48-02) | Right Rear Differential Fluid Pressure Sensor Circuit Low Voltage | TRS | ON | |
| C1844-62 (48-03) | Right Rear Differential Fluid Pressure Deviation | TRS | ON | |
| C1850-12 (44-12) | SH-AWD® Relay Stuck ON | TRS | ON | |
| C1850-14 (44-50) | SH-AWD® Relay Stuck OFF | TRS | ON | |
| C1851-87 (41-35) | 4WD-CAN Malfunction (SH-AWD® Control Unit - Rear Differential Pump Motor) | TRS | ON | |
| C1851-96 (77-35) | Invalid Data Received From Rear Differential Pump Motor | TRS | ON | |
| C1853-18 (52-04) | Left Rear Differential Solenoid Valve Current Deviation Low | TRS | ON | |
| C1853-19 (52-03) | Left Rear Differential Solenoid Valve Current Deviation High | TRS | ON | |
| C1853-1A (53-02) | Left Rear Differential Solenoid Valve Low Resistance | TRS | ON | |
| C1853-1A (53-04) | Left Rear Differential Solenoid Valve Low Resistance | TRS | ON | |
| C1853-1B (53-01) | Left Rear Differential Solenoid Valve High Resistance | TRS | ON | |
| C1853-1B (53-03) | Left Rear Differential Solenoid Valve High Resistance | TRS | ON | |
| C1853-1E (52-07) | Left Rear Differential Solenoid Valve High Current | TRS | ON | |
| C1854-18 (56-04) | Right Rear Differential Solenoid Valve Current Deviation Low | TRS | ON | |
| C1854-19 (56-03) | Right Rear Differential Solenoid Valve Current Deviation High | TRS | ON | |
| C1854-1A (57-02) | Right Rear Differential Solenoid Valve Low Resistance | TRS | ON | |
| C1854-1A (57-04) | Right Rear Differential Solenoid Valve Low Resistance | TRS | ON | |
| C1854-1B (57-01) | Right Rear Differential Solenoid Valve High Resistance | TRS | ON | |
| C1854-1B (57-03) | Right Rear Differential Solenoid Valve High Resistance | TRS | ON | |
| C1854-1E (56-07) | Right Rear Differential Solenoid Valve High Current | TRS | ON | |
| C1855-92 (63-01) | Rear Differential Pump Motor Low Speed | TRS | ON | |
| C1859-72 (71-02) | Left Rear Differential Fluid Pressure Deviation Low | TRS | ON | |
| C1859-73 (71-01) | Left Rear Differential Fluid Pressure Deviation High | TRS | ON | |
| C185A-72 (71-04) | Right Rear Differential Fluid Pressure Deviation Low | TRS | ON | |
| C185A-73 (71-03) | Right Rear Differential Fluid Pressure Deviation High | TRS | ON | |
| C1860-98 (76-01) | Rear Differential Fluid Overheats | TRS | ON | |
| U0029-00 (41-17) | F-CAN Malfunction (Bus-Off) | TRS | ON | |
| U0100-00 (41-01) | F-CAN Malfunction (SH-AWD® Control Unit - PCM) | TRS | ON | |
| U0101-00 (41-04) | F-CAN Malfunction (SH-AWD® Control Unit - TCM) | TRS | ON | |
| U0122-00 (41-02) | F-CAN Malfunction (SH-AWD® Control Unit - VSA Modulator-Control Unit) | TRS | ON | |
| U0126-00 (41-06) | F-CAN Malfunction (SH-AWD® Control Unit - Steering Angle Sensor) | TRS | ON | |
| U0131-00 (41-09) | F-CAN Malfunction (SH-AWD® Control Unit - EPS Control Unit) | TRS | ON | |
| U0151-00 (41-08) | F-CAN Malfunction (SH-AWD® Control Unit - SRS Unit) | TRS | ON | |
| U0401-68 (77-01) | Invalid Data Received From PCM | TRS | ON | |
| U0402-68 (77-04) | Invalid Data Received From TCM | TRS | ON | |
| U0416-68 (77-02) | Invalid Data Received From VSA Modulator - Control Unit | TRS | ON | |
| U3000-49 (78-xx) | SH-AWD® Control Unit Internal Control Module Failure | TRS | ON | |
| U3000-51 (91-01) | SH-AWD® Control Unit Programming Error | TRS | ON |
NOTE:
*1: This code is caused by an electrical circuit problem and cannot be caused by a mechanical problem in the transmission.
*2: With AWD
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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