Steering System: Overview Jeep Compass I рестайлинг 2

DESCRIPTION

This vehicle comes with power steering as standard equipment and it is the only steering system available. The power steering system consists of these major components

1. Power Steering Pump
2. Power Steering Gear
3. Power Steering Fluid Reservoir
4. Power Steering Fluid Pressure Hose
5. Power Steering Fluid Return Hose
6. Power Steering Fluid Cooler

For information on the first two components, refer to the appropriate Service Information . Information on the remaining components can be found in Power Steering Pump.

OPERATION - GAS ENGINE

Turning of the steering wheel is converted into linear (side-to-side) travel through the meshing of the helical pinion teeth with the rack teeth within the steering gear. The lateral travel pushes and pulls the tie rods to change the direction of the vehicle's front wheels.

Power assist steering is provided by a belt driven rotary type pump. It directs fluid through power steering fluid hoses to the power steering gear where it is used to assist the driver's turning effort.

Manual steering control of the vehicle can be maintained if power steering assist is lost. However, under this condition, steering effort is significantly increased.

OPERATION - DIESEL ENGINE

Turning of the steering wheel is converted into linear (side-to-side) travel through the meshing of the helical pinion teeth with the rack teeth within the steering gear. The lateral travel pushes and pulls the tie rods to change the direction of the vehicle's front wheels.

Power assist steering is provided by a belt driven combination water and power steering pump. The belt drives the water pump, onto which the power steering pump is mounted. It directs fluid through power steering fluid hoses to the power steering gear where it is used to assist the driver's turning effort.

Manual steering control of the vehicle can be maintained if power steering assist is lost. However, under this condition, steering effort is significantly increased.

OPERATION

The microprocessor-based Steering Control Module (SCM) utilizes integrated circuitry to monitor hard wired analog and multiplexed inputs from both the right and left multi-function switches. In response to those inputs, the internal circuitry of the SCM allow it to transmit electronic message outputs to the ElectroMechanical Instrument Cluster (EMIC) (also known as the Cab Compartment Node/CCN) over the Local Interface Network (LIN) data bus.

In response to those inputs the internal circuitry and programming of the EMIC, which is also the LIN master module in the vehicle, allow it to control and integrate many electronic functions and features of the vehicle through both hard wired outputs and the transmission of electronic message outputs to other electronic modules in the vehicle over the Controller Area Network (CAN) data bus. Refer to COMMUNICATION, DESCRIPTION .

The SCM is connected to both a fused B(+) circuit and a fused ignition switch output (run-start) circuit. It receives a path to ground at all times. These connections allow it to remain functional regardless of the ignition switch position. Any input to the SCM that controls a vehicle system function that does not require that the ignition switch be in the ON position such as turning on the lights, prompts the SCM to wake up and transmit on the LIN data bus.

The hard wired circuits between components related to the SCM may be diagnosed using conventional diagnostic tools and procedures. Refer to the appropriate wiring information. The wiring information includes wiring diagrams, proper wire and connector repair procedures, details of wire harness routing and retention, connector pin-out information and location views for the various wire harness connectors, splices and grounds.

However, conventional diagnostic methods will not prove conclusive in the diagnosis of the SCM or the electronic controls or communication between modules and other devices that provide some features of the SCM. The most reliable, efficient, and accurate means to diagnose the SCM or the electronic controls and communication related to SCM operation requires the use of a diagnostic scan tool. Refer to the appropriate diagnostic information.

Scheme 1

1. Place the front road wheels in the STRAIGHT-AHEAD position.
2. Open hood.
3. Disconnect and isolate the battery negative cable. WARNING: Wait two minutes for the airbag system reserve capacitor to discharge before beginning any airbag system or component service. Failure to do so may result in accidental airbag deployment, personal injury or death.
4. Remove steering wheel. Refer to «WHEEL, STEERING, REMOVAL»(ref-612706-S02893921272014043000000) .
5. Remove upper and lower steering column shrouds to gain access to the Steering Column Control Module (SCCM). Refer to «SHROUD, STEERING COLUMN, LOWER, REMOVAL»(ref-612706-S30441505572014043000000) and «SHROUD, STEERING COLUMN, UPPER, REMOVAL»(ref-612706-S23622087712014043000000) .
6. Lock the clockspring rotor in the center position as follows: Insert a grenade pin through the hole in the rotor at the 10 o'clock position.
7. Remove the three screws (1) to the Steering Column Control Module (SCCM) (3).
8. Disconnect the electrical connectors (2) between the SCCM (1) and the instrument panel wiring harness at the base of the SCCM and remove from column.

Note. If only removing the SCCM from column, there is no need to continue to next step.

Scheme 2

Scheme 3

Scheme 4

Scheme 5

1. Remove the left multi-function switch stalk retaining screw (2).
2. Pull the left stalk out of the SCCM.
3. Disconnect the left stalk electrical connector.
4. Separate the left switch from the SCCM.
5. Remove the one right multi-function switch retaining screw.
6. Pull right switch out of SCCM.
7. Disconnect the right switch electrical connector.

The power steering pump and water pump are part of one assembly, and are not serviced separately. To service the assembly, refer to PUMP, WATER, REMOVAL .

The recommended fluid for the power steering system is Mopar® Power Steering fluid + 4 or Mopar® ATF+4 Automatic Transmission Fluid. Both fluids have the same material standard specifications (MS-9602).

Mopar® ATF+4 (and Mopar® Power Steering fluid + 4), when new, is red in color. ATF+4 is dyed red so it can be identified from other fluids used in the vehicle such as engine oil or antifreeze. The red color is not permanent and is not an indicator of fluid condition. As the vehicle is driven, ATF+4 will begin to look darker in color and may eventually become brown. THIS IS NORMAL. ATF+4 also has a unique odor that may change with age. Consequently, odor and color cannot be used to indicate the fluid condition or the need for a fluid change.

DESCRIPTION - GAS ENGINE

The power steering fluid reservoir (5) is mounted above the right front inner fender well to a bracket (2).

Scheme 6

The power steering fluid reservoir (2) is mounted behind the radiator support on the left side of the engine bay, next to the battery.