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EPS sensor warning - 2008 Daihatsu Sirion 1.3i

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2008 HHR Power Steering works only once in a while need help trouble shooting


Electronic power steering . Do you know anything about automotive electronic's ? Electronic power steering control module , sensor inputs an output control ? DTC'S - diagnostic trouble codes . Electrical testing ? Do you have a professional type scan tool to check input an output data , codes ?
Power Steering System Description and Operation (Non-Turbo)
The electric power steering (EPS) system reduces the amount of effort needed to steer the vehicle. The system uses the body control module (BCM), power steering control module (PSCM), torque sensor, discrete battery voltage supply circuit, EPS motor, serial data bus, and the instrument panel cluster (IPC) message center to perform the system functions. The PSCM, torque sensor, not the EPS motor are serviced separately from each other or from the steering column. Any EPS components diagnosed to be malfunctioning requires replacement of the steering column assembly, also known as the EPS assembly.
Torque Sensor
The PSCM uses a torque sensor as it's main input for determining the amount of steering assist. The steering column has an input shaft, from the steering wheel to the torque sensor, and an output shaft, from the torque sensor to the steering shaft coupler. The input and output shafts are separated by a torsion bar, where the torque sensor is located. The sensor consists of a compensation coil, detecting coil and 3 detecting rings. These detecting rings have toothed edges that face each other. Detecting ring 1 is fixed to the output shaft, detecting rings 2 and 3 are fixed top the input shaft. The detecting coil is positioned around the toothed edges of detecting rings 1 and 2. As torque is applied to the steering column shaft the alignment of the teeth between detecting rings 1 and 2 changes, which causes the detecting coil signal voltage to change. The PSCM recognizes this change in signal voltage as steering column shaft torque. The compensation coil is used to compensate for changes in electrical circuit impedance due to circuit temperature changes from the electrical current and voltage levels as well as ambient temperatures for accurate torque detection.
EPS Motor
The EPS motor is a 12-volt brushed DC reversible motor with a 61-amp rating. The motor assists steering through a worm shaft and reduction gear located in the steering column housing.
Power Steering Control Module (PSCM)
The PSCM uses a combination of torque sensor inputs, vehicle speed, calculated system temperature and the steering calibration to determine the amount of steering assist. When the steering wheel is turned, the PSCM uses signal voltage from the torque sensor to detect the amount of torque being applied to the steering column shaft and the amount of current to command to the EPS motor. The PSCM receives serial data from the engine control module (ECM) to determine vehicle speed. At low speeds more assist is provided for easy turning during parking maneuvers. At high speeds, less assist is provided for improved road feel and directional stability. The PSCM nor the EPS motor are designed to handle 61 amps continuously. The PSCM will go into overload protection mode to avoid system thermal damage. In this mode the PSCM will limit the amount of current commanded to the EPS motor which reduces steering assist levels. The PSCM also chooses which steering calibration to use when the ignition is turned ON, based on the production map number stored in the BCM. The PSCM contains all 8 of the steering calibrations which are different in relation to the vehicles RPO's. The PSCM has the ability to detect malfunctions within the EPS system. Any malfunction detected will cause the IPC message center to display PWR STR (or Power Steering) warning message.

DTC C0000
DTC C0176
DTC C0460
DTC C0475 (with LNF)
DTC C0475 (without LNF)
DTC C0545 (without LNF)
DTC C0545 (with LNF)
DTC C0561
DTC C056D
DTC C056E
DTC C0845
Your best bet ,take it to a qualified repair shop .

Jul 07, 2017 | Cars & Trucks

1 Answer

The EPS light has come on my dashboard and the steering has become very heavy. what does this mean


The electronic power steering (EPS) Warning Light is located on the instrument panel. This light illuminates when the EPS is malfunctioning. When this light is lit, your steering may be a little heavier, and you should schedule an inspection as soon as possible. Tip The EPS Warning Light briefly illuminates when the car is first turned on. The light is only a problem if it stays lit for an extended period.

Jul 04, 2017 | Cars & Trucks

1 Answer

How can i fix my 2003 holden barina `eps warning light from coming on


It'll pay to have the crank sensor checked. They're known for heating up and stalling the car when they're no longer any good. Usually once it has cooled down the car will start but as soon as the sensor gets hot it'll stall again

Aug 28, 2016 | Holden Cars & Trucks

1 Answer

What does the eps light mean


EPS- Electronic power steering warning light. is there any steering problems ? Light being on means there probably is a trouble code in the EPS module .

Feb 24, 2016 | 2005 Hyundai Elantra

2 Answers

Hi my eps light is comming on and i lose power streering how do i fix it


It cannot be fixed until the problem with the Electronic Power Steering(EPS) is properly diagnosed.
The power assist system is comprised of...
  • EPS computer unit
  • Warning light on the dashboard
  • A connection to the OBD2 Diagnostic port in the car
  • A Vehicle speed sensor
  • A sensor which detects steering rotation on the input shaft of the steering rack
  • An electric motor, which provides the power steering assistance to the steering rack. Unless that motor runs you will have no power assistance to your steering.
  1. You will need to have the system scanned with the appropriate scan tool through the OBD port in the car. This will generate various fault codes which assist in diagnosing where the problem lies in the power steering system. It may be just a failed sensor that needs replacing or it might be a bigger problem.
  2. Once the fault codes have been pulled the mechanics can diagnose the cause and make whatever repairs or parts changes may be required.
  3. This is not a do it yourself exercise. You will need a mechanic who knows these Japanese electronic power steering systems and who understands the fault codes (and there are many of them on this EPS system) to diagnose the problem for you and fix whatever fault(s) has arisen.

Dec 30, 2015 | Daihatsu Cars & Trucks

1 Answer

What is the problem for EPS warning ?


read the operators guide yet, it explains that.
open glove box, take out opr. guide.
see EPS
Electronic Power Steering
it has problems, and the book says, get it serviced.
like all errors car can make (warnings)
you can do 2 things.
  1. get it serviced
  2. or read the FSM book, it tells you what to do.. step by step.
FSM factory service manual, sold at suzuki dealers.
or for 4 bucks,
at (google it) suzukipitstopplus

May 29, 2014 | 2004 Suzuki Ignis

2 Answers

What does eps warning light mean


You have a problem with your engine. Engine Power control System. This is telling you to check your engine. Go to Autozone and have them put a code checker on it and maybe rhey can tell you whar ir needs.

May 10, 2014 | Volkswagen Jetta Cars & Trucks

1 Answer

Eps in hyundai accent 2007


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.

Jul 28, 2012 | 2007 Hyundai Accent GS Hatchback

1 Answer

My car I10 magna 1.1 irde, when engine starts battery, oil etc warning lights shut off immediately but malfaction light & EPS light shut off one after one. Is this any problem pls clarify.


Ok, with the battery, oil etc lights are governed by simple circuits, and therfore, as soon as they receive power, and earth, they turn off right away.

With the other lights, the malfunction and EPS lights, these go through a self-test function where they check a number of sensors, not just one, and they do this very quickly......the malfunction light checks out 20-35 different sensors, and in less than 1-2 seconds, thats fast.........

However, if they STAY on, then this is where it detects a problem and you should come back and see us again.

If you liked this response, please vote !!!!!!

Jul 14, 2010 | 2007 Hyundai Accent GS Hatchback

5 Answers

EPS warning light on on my Mitsubishi Colt (2006).


My EPS on my mitsubishi colt 2006 stopped working about 8 months now, I changed the electronic box,but it started to work for ten minutes and then stopped.I carried it by some electricians and they put the computer on it, but it is not getting through.Could someone lend some assistance!!!!!!!!!!!!!!!!!!!!!!!!1

Feb 01, 2009 | 2006 Mitsubishi Colt

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