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.
2012 Acura MDXFACTORY OEM SERVICE PROCEDURE
VSA System Components
- Component Location Index
- General Troubleshooting Information
- DTC Troubleshooting Index
- Symptom Troubleshooting Index
- System Description
- VSA Modulator-control Unit Inputs and Outputs for 46P Connector
- System Outline
- ABS (Anti-lock Brake System) Features
- EBD (Electronic Brake Distribution) Features
- TCS (Traction Control System) Features
- VSA (Vehicle Stability Assist) System Features
- Brake Assist Features
- Modulator Unit
- HSA (Hill Start Assist) Features
- TSA (Trailer Stability Assist) Features
- Circuit Diagram
- DTC Troubleshooting
- DTC 11, 13, 15, 17: Wheel Speed Sensor Circuit Malfunction
- DTC 12, 14, 16, 18: Wheel Speed Sensor Signal Malfunction
- DTC 21, 22, 23, 24: Magnetic Encoder Malfunction
- DTC 25: Yaw Rate Sensor Malfunction; DTC 26: Lateral Acceleration Sensor Malfunction; DTC 28: Longitudinal Acceleration Sensor Malfunction
- DTC 27: Steering Angle Sensor Malfunction
- DTC 31, 32, 33, 34, 35, 36, 37, 38: ABS Solenoid Valve Malfunction
- DTC 51: Motor Lock; DTC 52: Motor Stuck; DTC 53: Motor Stuck
- DTC 54: Fail-safe Relay Malfunction
- DTC 59: BRK DIAG Signal High Voltage
- DTC 61: Battery Voltage Low
- DTC 62: Battery Voltage High
- DTC 65: Brake Fluid Level Low
- DTC 66: Pressure Sensor Malfunction
- DTC 68: Brake Pedal Position Switch Malfunction
- DTC 69: BRK DIAG Signal Low Voltage
- DTC 81: Modulator-Control Unit Internal Circuit Malfunction
- DTC 83: PGM-FI Malfunction
- DTC 84: VSA Sensor Neutral Position Not Written
- DTC 86: F-CAN Communication Malfunction
- DTC 88: Difference in Wheel Speed
- DTC 91: VSA Activation Time Too Long
- DTC 113: Yaw Rate-Acceleration Sensor Power Source Malfunction
- DTC 121, 122, 123, 124: VSA Solenoid Valve Malfunction
- DTC 131: Yaw Rate Sensor Malfunction
- DTC 132: Lateral Acceleration Sensor Malfunction; DTC 133: Lateral Acceleration Sensor Malfunction (Installation Error); DTC 135: Longitudinal Acceleration Sensor Malfunction; DTC 136: Longitudinal Acceleration Sensor Malfunction (Installation Error)
- DTC 134: Steering Angle Sensor Malfunction
- DTC 137: Pressure Sensor Offset Malfunction
- DTC 138: Brake Pedal Position Switch Malfunction
- DTC 158: ECU Software Update Failure
- Symptom Troubleshooting
- Steering Angle Sensor Replacement
- Yaw Rate-Lateral/Longitudinal Acceleration Sensor Replacement
- VSA Sensor Neutral Position Memorization
- VSA Off Switch Test/Replacement
- VSA Modulator-Control Unit Update
- VSA Modulator-Control Unit Removal and Installation
- Wheel Speed Sensor Replacement
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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