Power Steering light comes on from time to time on Daihatsu Sirion1.5 sport & steering very stiff. Mech tells me the EPS Board cracked from heat..is that possible. Thanks 083 780 5566 South Africa

Fault in electronic power steering system, have it scanned for fault codes

ELECTRIC POWER STEERING (EPS)
The TSX uses Electric Power Steering (EPS) which regulates steering via a computer-actuated electric motor. With the computer-controlled system, advanced algorithms built into the operating software allow for continuous fine-tuning of the steering assist forces so that minimal force is required at low speeds- such as when parking or maneuvering. Conversely, progressively higher steering effort is generated at higher speeds (such as when driving on the freeway) to deliver a sport-minded driving experience.
The EPS system found in the TSX is an evolution of an earlier EPS system found on the Acura NSX supercar. Its key features and advantages include:

• The EPS system reduces the steering effort at low speeds, improving agility and ease of effort when parking or maneuvering in tight areas
• Rigidity of the steering mount is higher, which allows a more precise and "connected" feel during high-speed maneuvers (such as during lane changes or when on winding mountain roads)
• The EPS steering assist incorporates computer algorithms based on vehicle speed rather than engine speed, allowing TSX engineers the flexibility of tailoring the steering feel to match actual driving conditions- especially high-speed driving. The EPS steering algorithms incorporate steering assist changes for every 0.6 mph.
• The EPS system is different (and uniquely tuned) for each of the TSX models: 2.4L I-4 sedan, 3.5L V-6 sedan, and the new Sport Wagon.
• EPS employs a sporty, 13.5:1 steering ratio which further improves performance driving agility
• In its evolution from the original NSX system, the TSX's EPS system uses a significantly more powerful electric motor teamed with a far more sophisticated microprocessor
• By eliminating the conventional power steering pump assembly, EPS uses less engine power which improves acceleration and fuel efficiency

it is an electric pump without a pulley or belt or fluid apparently

Sirion 2006 model power steering system have some failure in EPS motor. remove your power steering motor and clean and fix it. power steering system will ok.
if it is not good tell me please what is the error code

if you don't know what is the error code you can check that your self's

EPS is Electronic Power Steering.

When the light comes on, it is a warning that the Electronic Power Steering system is having a problem.

The increased force you have to use, is because the EPS is not assisting you as much as it was before, if at all.

Here is a link to a video explaining the basic operation of the electronics at youtube.

EPS stands for Electric Power Steering. Hyundais have electric power steering instead of belt driven pumps. But they still require power steering fluid, Check the fluid to see if it is low. That would trigger the signal to come on.

Most likely needs power steering fluid.

First you have to check power steering fluid level, and if it's ok then you have to check power steering pump. If you have a EPS light on your dash, then you have to plug a ODBII diagnostic tool to read code and then interpret what the problem is.

vauxhall charge 47 pound to look at the car for you sounds like the steering rack but i cant be sure, i would take it to vauxhall cause a backstreet could get it wrong and it would cost you more

EPS is activated only when the driver steers the steering wheel, thus reducing energy loss compared with the hydraulics. Its modular design allows for easy assembly. EPS consists of motor, electronic control unit (ECU), torque sensor and steering gear.
Our unique control algorithm allows for improved handling. Compact, light weight. Capable of controlling motors from 25 to 80A. Standardized column integrated or stand alone ECU.Basically its a electrically power steering to assist the driver to turn the steering wheel. Check the electronic control unit(ECU) for any short/burnout and the wiring should be pliable. If not then proper amount of current is not reaching the motor.
The light can light up if there a failure of the motor or any sensor is activated when this circuit has any problem.
Get i checked & repaired from their authorized Dealer and also get a service warranty for the part replaced as per norms out there.
However repair immediately otherwse you might find the steering wheel turning in haphazard manner or it could get locked while driving! .........................................sodeep