Your 2019 Acura RLX Sport Hybrid features the sophisticated SH-AWD (Super Handling All-Wheel Drive) system that made the RLX a technological showcase. When a malfunction warning appears, understanding this unique system helps you assess the situation.
What Makes RLX SH-AWD Special
The RLX Sport Hybrid's SH-AWD differs from other systems:
- Uses electric motors at the rear wheels instead of a traditional rear differential
- Can provide individual torque control to each rear wheel
- Actively vectors torque to improve handling
- Integrates with the hybrid system for total vehicle control
This is among the most advanced AWD systems ever produced.
What the Warning Indicates
SH-AWD malfunction warnings can indicate:
- Rear motor issues - Problems with the twin rear electric motors
- Power control unit problems - Electronics managing motor operation
- Sensor malfunctions - Wheel speed or position sensors
- Communication errors - Network issues between systems
- Battery/hybrid system integration - Power supply issues
- Software glitches - Control programming errors
How the System Responds
When SH-AWD faults:
- The system may default to front-wheel drive only
- Torque vectoring may be disabled
- Some driving dynamics features are limited
- The car remains drivable but with reduced capability
Integration with Hybrid System
The RLX Sport Hybrid's SH-AWD draws power from the hybrid battery. Issues with the hybrid system can affect SH-AWD operation, and vice versa. Diagnosis must consider the entire electrified drivetrain.
Service Requirements
RLX SH-AWD service requires:
- Acura dealer with hybrid certification
- High-voltage safety training
- Specialized diagnostic equipment
- Understanding of the unique twin-motor system
Repair Costs
RLX Sport Hybrid repairs can be significant:
- Sensor replacement: $200-$500
- Software updates: $100-$200
- Power control unit: $1,500-$3,500
- Rear drive motor: $3,000-$6,000