CORSA ELECTRIC POWER STEERING
There are some common faults with the Corsa Electric Power Steering
that manifest themselves as one or both of these conditions
1: The car pulls to one side or is easier turn in one direction when
all else seems to be correct. E.g. Tyres equal, steering and
suspension geometry good, brakes and wheel bearings good, driven on
a straight and level road.
2: When turning, the steering will randomly seem to jam or stick for
an instant, and the steering wheel becomes suddenly heavy and then
reverts to normal.
Both of these can be rectified using a few commonly available tools
and less than an hour's work. By many accounts the solution from your
friendly Vauxhall Opel dealer is to replace the entire column.
FAULT DESCRIPTION
The most common problem by far with the Corsa EPS is caused by the
torque sensing mechanical components wearing with age leading to an
error with the torque sensor reading that gradually gets worse. The
situation can be rectified by adjusting the position of the torque
sensor to a new zero position.
1: Steering pulls or has a preference for one direction
==========================================================================================
This fault is caused by the mechanical components that translate the
steering column effort (Control Demand) into motion that is
proportional to torque. Direction is inferred by the magnitude of the
torque being positive or negative. This mechanical translation is
managed using a slant-pivot coupling connecting the upper and lower
parts of the steering column that operates a sliding collar normally
held in a central position by springs. The motion of the slant-pivot
coupling is limited, and at either extreme allows direct coupling
between the upper and lower sections of the steering column. The
torque sensor detects the position of the sliding collar and produces
an electrical signal to represent the effort and direction of turning
the steering wheel. The EPS system then activates the motor that
drives the lower section of the steering column in the correct
direction to reduce the sensor reading to zero. i.e. No more turning
is demanded.
The problem occurs when the slant-pivot coupling or the sliding
collar bind or lock at some position in the travel. The components
are lubricated when built, but the lubricant degrades over time and
eventually hardens and dries where it is thinnest. When the steering
is turned slowly or by a small amount the friction at some points is
enough to make the coupling bind rather than slide, causing a zero
torque reading that effectively removes all power assistance until
the coupling moves. To the driver this seems like the steering just
got very heavy or jammed for an instant.
It is possible to reinvigorate the assembly using a mixture of
ordinary gear oil and a molybdenum disulphide based additive such as
molyslip or stop smoke.
Method:
Carry out the same procedure as case 1, then mark the correct
position of the torque sensor and remove it.
Inject no more than 15cc of the Oil & MoS2 lubricant mixture into the
void around the sliding collar and replace the torque sensor
carefully. It will be necessary to rotate the sensor until the sensor
actuator engages with the sliding collar correctly. Until the sensor
is correctly engaged it will fail to seat properly. Do not force it
into place or use the screws to try and pull it into position. The
sensor arm is biased to one end by a spring and it will have moved
when the sensor was extracted. Offer it into place and feel for the
situation where the sensor arm spring tension can be detected. When
it is in the right position it will just go into place easily and
then it can be rotated to the correct neutral position as previously
marked.
Before replacing everything else, start the engine and check that the
steering behaves properly. If it turns in one direction switch off
immediately and reset the torque sensor position by following the
procedure for case 1.
After lubricating the internal components, a few days may need to
elapse before the lubricant penetrates all parts of the coupling.
Over this time the steering will gradually become lighter and may
start to favour one direction as the coupling finds a new equilibrium
position. If this occurs it will be necessary to reset the torque
sensor position again.
No power steering was not in 1997 corsa. it came after 1999
On newer corsas the power steering is all Electronic so it doesn't need power steering fluid.
You don't. The Power Steering is electric and does not use fluid.
yes it does but only at low speeds
its run by a motor on steering rack electronically
First, check the level of the fluid in the power steering tank. Second, check and see if there is a fuse leading to the power steering control. That will be in the owner's manual. Third, check for a loose fan belt. Fourth, take it into a shop.
Depends what year it is..2000 up have electronic power steering
Yes, but the cost of actually doing so will make the conversion not worth while.
all corsa`s have electric power steering
My 1999 V Reg does. So Im guessing the answer is yes. there s an electric motor built into the steering column.
This would be a big job,involving a complete new EPS steering column and wiring loom so the control unit can be connected up.Suggest you contact a vauxhall service dept. for a full answer regarding prices.Most people who decide they need power steering just change the car.
were is the power steering fluid resovoir on vauxhall signum 53 diesel