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C1555 fault code

The problem was solved by changing both item eps cu and steering assy. with motor. but zero adjustment still not succesful

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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

How to fix electric power steering in 2005 cevrolet colbalt


What's wrong ? light on ? Have it checked for codes ? GM had recall for the cobalt . Do you know it has electronic power steering ?
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.

DTC C0000
DTC C0176
DTC C0475
DTC C0545
DTC C0845
DTC C0895
Your best bet , take it to the dealer !

Apr 11, 2017 | Cars & Trucks

1 Answer

I have a 2006 Pontiac torrento and my steering wheel gets hard. not all the time it dos it 1 a day at least Dont know whats the problem i have try to check for the fuled but no luck plz help


Your vehicle has electric power steering . GM had a recall on some of it's vehicle .
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, nor the EPS motor are serviced separately from each other or from the steering column. Ant EPS components diagnosed to be malfunctioning requires replacement of the steering column assembly, also known as the EPS assembly.

Oct 20, 2015 | Pontiac Cars & Trucks

1 Answer

Power stering failure saturn ion 2006


Hey Alex , what would you like to know ? Your vehicle has Electronic power steering , controlled by a control module .
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.
They had a recall on these systems ! Suggest you take it to a GM dealer , Chevy , Cadillac , Buick , etc.....

May 07, 2015 | 2006 Saturn ION

1 Answer

Where is the power steering pump located?


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

Aug 09, 2014 | 2011 Acura TSX

1 Answer

Hiyundai i10 power streering problem


you can ask for a part number & try to buy it from another source.
you can ask that they return the old item to you after replacement, the part numbers on the invoice & on the old unit should match.

May 19, 2017 | Hyundai i10 Cars & Trucks

2 Answers

Why does the car drag when changing gears? the various lights on the dashboard are blinking and it shows EPS


EPS indicates Electronic power steering warning light.---------The power steering needs to be inspected.The power steering pump, the power steering fluid, the power steering hose ,power steering belt and pulley. Get your car scanned by the dealer or at local car garage.That will be much helpful.As you will receive codes, as per codes you can replace the part or get the part checked.A fault in the wiring loop causes it to short on the steering column.This problem is very much noticed in Hyundai cars.-------

This will solve the problem or point you towards the cause of problem. Thank you for using fixya.

Jul 01, 2011 | Hyundai Elantra Cars & Trucks

1 Answer

Where is a power steering pump located on a 4 cylinder chevy cobalt ls


Your Cobalt is not equiooed with a Power Steering Pump. It has electric power steering. See the description below.

Power Steering - System Description and Operation
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.

Nov 20, 2009 | 2005 Chevrolet Cobalt

1 Answer

Where is a power steering pump located on a 4 cylinder in a 2005


Your Cobalt is not equipped with a Power Steering Pump. It is equipped with electric power steering. See the description below.


Power Steering - System Description and Operation
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.

Nov 20, 2009 | 2005 Chevrolet Cobalt

2 Answers

Need a drawing of the worm shaft and spool valve assy.


closest I have is 94 explorer. may be similar.

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Item Part Number Description 1 3E501 Steering Gear Sector Shaft Seal 2 3524 Steering Gear Input Worm Gear and Rack 3 3647 Steering Gear Worm Ball 4 3523 Steering Gear Ball Return Guide 5 3A670 Steering Gear Worm Thrust Bearing Adjuster 6 — Locknut (Part of 3577) 7 3571 Steering Gear Worm Thrust Bearing 8 3575 Steering Gear Sector Shaft 9 3524 Steering Gear Input Worm Gear and Rack

May 09, 2009 | 1983 Ford F 250

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