Honda HR-V: EPS System Description - Motion Adaptive-EPS Control
Overview
Motion adaptive-EPS control performs the steering torque correction control coordinated with VSA system for stabilizing the vehicle when the steering is unstable. The EPS system determines the state of the vehicle based on the data calculated by the VSA modulator-control unit, and the data from the yaw rate sensor and the acceleration sensor. When the system determines that the vehicle behavior is abnormal, the EPS control unit calculates the correction current based on the vehicle behavior and corrects the steering torque. The motion adaptive-EPS control is stopped in the event of failure in the VSA system.
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Fig. 2: Motion Adaptive-EPS Control System Diagram
Mitigates Oversteer Control
When oversteer occurs, it compensates for steering torque to steer in the countersteer direction, and enhances vehicle control.
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Mitigates Oversteer Control
When oversteer occurs, it compensates for steering torque to steer in the countersteer direction, and enhances vehicle control.
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Stabilizes Braking on Road Surfaces With Different Friction Coefficients Control
When the vehicle behavior is abnormal while braking on an uneven road surface, it compensates for steering torque to enhance vehicle control.
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EPS System Description - Overview
System Outline
This vehicle is equipped with electrical power steering (EPS). The driver's
steering force is assisted by an
electric motor at the steering column. Compared to a hydraulic assist power
Check
POWER STEERING ASSIST CHECK
Check
1. Power Steering Assist - Check
NOTE: This test should be done with original equipment tires and wheels at
the
correct tire pressure.
Start the engine, and let i
DTC Troubleshooting Index
EPS DTC TROUBLESHOOTING INDEX
TESTING
EPS CONTROL UNIT UPDATE
Special Tools Required
MVCI unit with the latest control module (CM)
update software installed
1. EPS Control Unit - Update
NOTE: Check
SEE MORE:
APP Sensor Signal Inspection
Inspection
NOTE:
This procedure checks the APP sensor in its fully closed position. In
any other position, the APP sensor
stores DTCs which are covered in other troubleshooting procedures.
Check for Pending or Confirmed DTCs with the HDS before doing this
procedure. If any DTCs are
indicate
DTC Troubleshooting 81-13: Modulator-Control Unit Internal Circuit
Malfunction
NOTE: Before you troubleshoot, review the general troubleshooting
information.
1. Problem verification:
Turn the vehicle to the ON mode.
Clear the DTC with the HDS.
Turn the vehicle to the OFF (LOCK) mode.
Test-drive the vehicle.
NOTE: Drive the vehicle on the road, not on a lift.
Check fo
