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:
Engine Will Not Start, Engine Starts But Stalls Immediately, Or Engine Is
Hard To Start
Special Tools Required
Vacuum Pump/Gauge, 0-30 inHg Snap-on YA4000A or equivalent, commercially
available
NOTE:
Before beginning this troubleshooting, do a customer diagnostic
interview - Refer to: Fuel and
Emissions Systems Symptom Troubleshooting - Engine stalls Diagnostic
interview, or Fu
Lane Departure Warning (LDW) Symptom Troubleshooting - LDW OFF
Switch Does Not Work Or OFF Indicator Does Not Come ON
1. LDW OFF switch indicator check 1:
Turn the vehicle to the ON mode.
Operate the LDW OFF switch.
Check and note the parameter below with the HDS.
Does the value change?
YES
Go to step 2.
NO
Go to step 5.
2. LDW OFF switch indicator check 2:
Check the LDW OFF switch indicator.
Does the indi
