Honda uses a variable-assist rack and pinion electric power steering (EPS) system rather than a typical hydraulic power steering system.
A typical hydraulic power steering system is continually placing a small load on the engine, even when
no steering assist is required. Because the EPS system only needs to draw electric power when steering assist is required, no extra energy is needed when cruising, improving fuel efficiency.
Electric power steering (EPS) is mechanically simpler than a hydraulic system, meaning that it should be more reliable. The EPS system is also designed to provide good road feel and responsiveness.
The system's compactness and simplicity offer more design freedom in terms of placement within the
chassis. The steering rack, electric drive and forged-aluminum tie rods are all mounted high on the
bulkhead, and steer the wheels via steering links on each front suspension strut. This location was chosen in
order to achieve a more compact engine compartment, while improving safety.
The operating principle of the EPS is basically the same as hydraulic power steering except for the
· A torque sensor is used in place of the valve body unit
· An electric assist motor is used in place of the hydraulic power cylinder
· An EPS control unit is added
The EPS control unit is mounted inside the car on the right side bulkhead, underneath the dash. It
receives input from the vehicle speed sensor and torque sensor mounted on the steering pinion shaft.
The pinion shaft engages the pinion gear via a torsion bar, which twists slightly when there is a high amount of steering resistance. The amount of twist is in proportion to both the amount of resistance to wheel turning, and to the steering force applied. A pin on the torsion bar engages a diagonal slot in the sensor core, which moves up or down depending on the amount of torsion bar twist, and the direction of rotation. Two coils surrounding the core detect both the amount, and the direction of movement. Using this information, the EPS control unit determines both the amount of steering assist required, and the direction. It then supplies current to the motor for steering assist. The amount of assist is also modified in proportion to vehicle speed to maintain good steering feel.
How to fix this problem
- Get the Battery Checked .... Could be low on AMP's
- Check the Battery terminals are they good
- Check the EPS fuse - is a 2 Amp fuse
- Have you been starting the car and holding the revs higher with the pedal ??????
Have you driven the car for a few hundred yards to see if it kicks in and the light goes out
6 change the battery take it for a drive and all will be back to normal
MAKE SURE YOU HAVE THE RADIO CODES etc etc