Power Steering System Chevrolet Corvette C6

Fastener Tightening Specifications

Power Steering Pump Specifications

Scheme 1

DIAGNOSTIC CODE INDEX

DIAGNOSTIC CODE INDEX

Begin the system diagnosis by reviewing the system Description and Operation. Refer to Power Steering System Description and Operation (w/o Electro-Hydraulic Steering) . Reviewing the Description and Operation information will help you determine the correct symptom diagnostic procedure when a malfunction exists. Reviewing the Description and Operation information will also help you determine if the condition described by the customer is normal operation. Refer to Symptoms - Power Steering System in order to identify the correct procedure for diagnosing the system and where the procedure is located.

Diagnostic Starting Point - Variable Effort Steering

Begin the system diagnosis with the Diagnostic System Check - Vehicle . The Diagnostic System Check will provide the following information

1. The identification of the control modules which command the system
2. The ability of the control modules to communicate through the serial data circuit
3. The identification of any stored DTCs and their status

The use of the Diagnostic System Check will identify the correct procedure for diagnosing the system and where the procedure is located.

Diagnostic Instructions

1. Perform the «Diagnostic System Check - Vehicle»(/chevrolet/corvette/c6-2004-2014/remont/oem-general-information/#vehicle-diagnostic-information) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/chevrolet/corvette/c6-2004-2014/remont/oem-general-information/#vehicle-diagnostic-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(/chevrolet/corvette/c6-2004-2014/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

Diagnostic Fault Information

Circuit/System Description

The electronic brake control module (EBCM) controls the current through the Variable Effort Steering (VES) actuator located on the steering gear. The current used to control the VES actuator is between 0 and 1 Amp. At low speeds and in parking lot maneuvers the current is applied to the actuator causing the orifice to open increasing fluid flow and reducing the steering effort. At high speeds the orifice is commanded closed by reducing current through the actuator and restricting fluid flow increasing steering effort. The EBCM monitors and compares the Commanded and Feedback Current parameters to detect malfunctions in the VES system.

Conditions for Running the DTC

1. The ignition is ON.
2. Ignition voltage is greater than 8 volts.

C0450 00

The actuator current exceeds 150mA.

C0450 5A

If the solenoid feedback voltage is greater than 80 percent while the actuator is commanded ON.

Action Taken When the DTC Sets

1. The driver information center (DIC) will display SERVICE POWER STEERING message.
2. Vehicle speed will be limited to 80 mph.

Conditions for Clearing the DTC

1. The condition for setting the DTC is no longer present and the DTC is cleared with a scan tool.
2. The EBCM automatically clears the history DTC when a current DTC is not detected in 100 consecutive drive cycles.

Diagnostic Aids

The vehicle may need to be driven to view full VES Actuator Commanded and Actuator Feedback Data parameters.

Reference Information

Schematic Reference

Power Steering Schematics

Connector End View Reference

Component Connector End Views

Description and Operation

Variable Effort Steering System Description and Operation

Electrical Information Reference

1. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis)
2. «Circuit Testing»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__circuit-testing)

Scan Tool Reference

Control Module References for scan tool information

Circuit/System Testing

1. Ignition OFF, disconnect the harness connector at the VES actuator. IMPORTANT: In order to ensure correct test results, the J-35616 test lamp must be used to perform the following steps. Failure to use the J-35616 test lamp may result in inaccurate test results and potential misdiagnosis.
2. Ignition ON, verify that a test lamp illuminates between the control circuit terminal A and ground. If the test lamp does not illuminate, test the control circuit for a short to ground or an open/high resistance.
3. Ignition OFF, connect the test lamp between the control circuit terminal A and the control circuit terminal B.
4. Ignition ON, verify the test lamp briefly illuminates for approximately 1 second, then turns OFF. If the test lamp is always ON, test the control circuit terminal B for a short to ground. If the circuit tests normal, replace the EBCM. If the test lamp is always OFF, test the control circuit terminal B for a short to voltage or an open/high resistance. If the circuit tests normal, replace the EBCM.
5. If all circuits test normal, test or replace the VES actuator.

Component Testing

1. Ignition OFF, disconnect the VES actuator harness connector terminal A and B.
2. Measure for 2.5-10 ohms of resistance between the VES actuator terminals. If not 2.5-10 ohms of resistance, replace the VES actuator.
3. Measure for infinite ohms of resistance between each VES actuator terminals and the VES actuator housing. If less than the specified range, replace the VES actuator.

Repair Procedures

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

1. «Control Module References»(/chevrolet/corvette/c6-2004-2014/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for EBCM replacement, setup, and programming.
2. «Steering Gear Replacement»(/chevrolet/corvette/c6-2004-2014/remont/manual-power-steering/#power-steering-system)

1. Determine if the vehicle is equipped with an electrically assisted variable effort system. Perform electrical diagnosis before proceeding with mechanical diagnosis. Refer to «DTC C0450»(/chevrolet/corvette/c6-2004-2014/remont/manual-power-steering/#power-steering-system) .
2. Review the system description and operation in order to familiarize yourself with the system functions. Refer to «Power Steering System Description and Operation (w/o Electro-Hydraulic Steering)»(/chevrolet/corvette/c6-2004-2014/remont/manual-power-steering/#power-steering-system) .

Visual/Physical Inspection

1. Inspect for aftermarket devices which could affect the operation of the power steering system.
2. Inspect the easily accessible or visible system components for obvious damage or conditions which could cause the symptom.
3. Inspect for leaking power steering components. If necessary, refer to «Power Steering Fluid Leaks»(/chevrolet/corvette/c6-2004-2014/remont/manual-power-steering/#power-steering-system__power-steering-fluid-leaks) .
4. Verify the power steering fluid level per operating specification. Refer to «Checking and Adding Power Steering Fluid»(/chevrolet/corvette/c6-2004-2014/remont/manual-power-steering/#power-steering-system__checking-and-adding-power-steering-fluid) .
5. Inspect the power steering fluid for the following indications of contamination: Milky fluid - water Brown fluid - burnt Debris in fluid - plastic or dirt
6. If necessary, flush the power steering system. Refer to «Power Steering System Flushing»(/chevrolet/corvette/c6-2004-2014/remont/manual-power-steering/#power-steering-system) .

Symptoms List

Refer to a symptom diagnostic procedure from the following list in order to diagnose the symptom

1. «Power Steering Fluid Leaks»(/chevrolet/corvette/c6-2004-2014/remont/manual-power-steering/#power-steering-system__power-steering-fluid-leaks)
2. «Rattle, Clunk, or Shudder Noise from the Power Steering System»(/chevrolet/corvette/c6-2004-2014/remont/manual-power-steering/#power-steering-system)
3. «Whine or Growl Noise from the Power Steering System»(/chevrolet/corvette/c6-2004-2014/remont/manual-power-steering/#power-steering-system)
4. «Steering Effort Hard or Too Easy in One or Both Directions»(/chevrolet/corvette/c6-2004-2014/remont/manual-power-steering/#power-steering-system__steering-effort-hard-or-too-easy)

Scheme 2

Test Description

The numbers below refer to the step numbers on the diagnostic table.

1. 5: This step tests the system for restrictions.
2. 7: This step tests the following components for the following conditions: The pump for internal leaks The power steering pipes for kinks
3. 8: This step tests the ability of the pump to regulate flow at maximum pressure.
4. 10: This step tests the ability of the pump to regulate flow under normal operating conditions.
5. 12: This step tests the internal components of the pump and the gear.

Power Steering Fluid Leaks

Poor Return of Steering Wheel

Poor Return of Steering Wheel

Steering Effort Hard or Too Easy in One or Both Directions

Special Tools

J 8001 Dial Indicator Set

Inspection Procedure

1. Turn the ignition key to the on position with the engine off.
2. With the aid of an assistant, turn the steering wheel to the full stop position and hold it in that position until the test is complete. The tie rod being tested should be inside the steering gear housing seated against the steering stop.
3. Raise and support the vehicle. Refer to «Lifting and Jacking the Vehicle»(/chevrolet/corvette/c6-2004-2014/remont/hoistjack/#general-information__lifting-and-jacking-the-vehicle) .
4. If there is not a good location for the dial indicator pointer at the steering gear housing, install a large worm gear hose clamp to the steering gear housing over the larger steering gear boot clamp and align the clamp so that the screw can be a location for the dial indicator pointer.
5. Install a dial indicator between the inner tie rod (2) and the steering gear housing or the worm gear clamp in such a way as to measure the lash between the inner tie rod and the steering gear housing.
6. Grasping the tire at the 3 o'clock and 9 o'clock positions, gently push in on one side of the tire to remove any lash.
7. Zero the dial indicator.
8. On the same side of the tire previously pushed inwards, gently pull outwards and measure the lash.
9. Record the measurement seen on the dial indicator.
10. If the measured value exceeds 0.5 mm (0.02 in) then replace the inner tie rod. Refer to «Rack and Pinion Inner Tie Rod Replacement»(/chevrolet/corvette/c6-2004-2014/remont/manual-power-steering/#power-steering-system) .
11. Repeat the procedure for the other side.

J 8001 Dial Indicator Set

1. Inspect the outer tie rod end seal. If the outer tie rod end seal is torn, replace the outer tie rod end. Refer to «Steering Linkage Outer Tie Rod Replacement»(/chevrolet/corvette/c6-2004-2014/remont/manual-power-steering/#power-steering-system) .
2. Raise the side of the vehicle being inspected with a floor jack while maintaining contact between the opposite wheel and the shop floor. Support the lower control arm with a floor jack stand as far outboard as possible and remove the floor jack. Refer to «Lifting and Jacking the Vehicle»(/chevrolet/corvette/c6-2004-2014/remont/hoistjack/#general-information__lifting-and-jacking-the-vehicle) .
3. Install dial indicator J 8001 or equivalent between the outer tie rod end and the steering knuckle as shown in the graphic. Note that the tire and wheel assembly is shown removed only for clarification of the dial indicator position.
4. Grasping the tire at the 3 o'clock and 9 o'clock positions, gently push in on one side of the tire to remove any lash.
5. Zero the dial indicator.
6. On the same side of the tire previously pushed inwards, gently pull outwards and measure the lash.
7. Record the measurement seen on the dial indicator.
8. Movement should not exceed 0.5 mm (0.02 in). If the movement exceeds 0.5 mm (0.02 in) then replace the outer tie rod. Refer to «Steering Linkage Outer Tie Rod Replacement»(/chevrolet/corvette/c6-2004-2014/remont/manual-power-steering/#power-steering-system) .
9. Repeat this procedure for the other side of the vehicle.

1. Fill pump reservoir with fluid to minimum system level, FULL COLD level, or middle of hash mark on cap stick fluid level indicator.
2. If equipped with hydro-boost, fully charge the hydro-boost accumulator using the following procedure: Start the engine. Firmly apply the brake pedal 10-15 times. Turn the engine OFF.
3. Raise the vehicle until the front wheels are off the ground. Refer to «Lifting and Jacking the Vehicle»(/chevrolet/corvette/c6-2004-2014/remont/hoistjack/#general-information__lifting-and-jacking-the-vehicle) .
4. Key on engine OFF, turn the steering wheel from stop to stop 12 times. Vehicles equipped with hydro-boost systems or longer length power steering hoses may require turns up to 15 to 20 stop to stops.
5. Verify power steering fluid level per operating specification. Refer to «Checking and Adding Power Steering Fluid»(/chevrolet/corvette/c6-2004-2014/remont/manual-power-steering/#power-steering-system__checking-and-adding-power-steering-fluid) .
6. Start the engine. Rotate steering wheel from left to right. Check for sign of cavitation or fluid aeration (pump noise/whining).
7. Verify the fluid level. Repeat the bleed procedure, if necessary.

Checking and Adding Power Steering Fluid

1. Clean the area surrounding the reservoir cap.
2. Remove the reservoir cap.
3. Inspect the power steering pump fluid level at regular intervals. Use the appropriate procedure below. Add fluid when required. Refer to «Fluid and Lubricant Recommendations»(/chevrolet/corvette/c6-2004-2014/remont/lubrication-system/#maintenance-and-lubrication__fluid-and-lubricant-recommendations) . Fluid Is Hot Run the engine until the fluid reaches about 80°C (170°F). Turn the engine OFF. Remove the reservoir cap. Inspect the fluid level on the capstick. Ensure that the fluid level is at the HOT/FULL/MAX mark on the capstick.
4. If the fluid level is low, add power steering fluid to the proper level.
5. Install the reservoir cap.
6. When checking the fluid level after servicing the steering system, bleed the air from the system. Refer to «Power Steering System Bleeding»(/chevrolet/corvette/c6-2004-2014/remont/manual-power-steering/#power-steering-system) .

1. Turn OFF the engine.
2. Raise the front end of the vehicle off the ground until the tires and wheels turn freely. Refer to «Lifting and Jacking the Vehicle»(/chevrolet/corvette/c6-2004-2014/remont/hoistjack/#general-information__lifting-and-jacking-the-vehicle) .
3. Place a large container under the fluid return hose in order to collect the draining fluid.
4. Remove the fluid return hose at the power steering pump reservoir inlet connection.
5. Plug the reservoir return hose inlet connection on the power steering pump.
6. With the key on engine off, turn the steering wheel fully to the left and to the right while an assistant maintains the minimum fluid level in the reservoir using new approved power steering fluid. Continue until the fluid from the return hose runs clear.
7. Remove the plug from the pump reservoir inlet connection and install the fluid return hose to the pump reservoir.
8. Bleed the power steering system. Refer to «Power Steering System Bleeding»(/chevrolet/corvette/c6-2004-2014/remont/manual-power-steering/#power-steering-system) .
9. Inspect the power steering fluid for the following indications of contamination: Milky fluid - water Brown fluid - burnt Plastic debris or dirt chunks
10. If the fluid is contaminated, repeat steps 2-9.
11. Lower the vehicle and check the Power Steering system for leaks.

Removal Procedure

1. Place a drain pans under the vehicle as needed.
2. Remove the capstick (1) from the remote power steering fluid reservoir (2) and remove as much power steering fluid as possible.
3. Remove the remote power steering fluid reservoir (2) from the remote power steering fluid reservoir bracket (5).
4. Remove the following components from the remote power steering fluid reservoir (2): The power steering reservoir outlet hose. Refer to «Power Steering Fluid Reservoir Outlet Hose Replacement (LS3, LS7)»(/chevrolet/corvette/c6-2004-2014/remont/manual-power-steering/#power-steering-system) . The power steering return hose. Refer to «Power Steering Return Hose Replacement (LS3,LS7)»(/chevrolet/corvette/c6-2004-2014/remont/manual-power-steering/#power-steering-system) .
5. Remove the remote power steering fluid reservoir (2) from the vehicle.

Installation Procedure

1. Install the remote power steering fluid reservoir (2) to the vehicle.
2. Install the following components to the remote power steering fluid reservoir (2): The power steering reservoir outlet hose. Refer to «Power Steering Fluid Reservoir Outlet Hose Replacement (LS3, LS7)»(/chevrolet/corvette/c6-2004-2014/remont/manual-power-steering/#power-steering-system) . The power steering return hose. Refer to «Power Steering Return Hose Replacement (LS3,LS7)»(/chevrolet/corvette/c6-2004-2014/remont/manual-power-steering/#power-steering-system) .
3. Install the remote power steering fluid reservoir (2) to the remote power steering fluid reservoir bracket (5).
4. Clean any excessive power steering fluid from the vehicle and remove the drain pans.
5. Fill and bleed the power steering system. Refer to «Power Steering System Bleeding»(/chevrolet/corvette/c6-2004-2014/remont/manual-power-steering/#power-steering-system) .

1. Place drain pans under the vehicle as needed.
2. Remove as much power steering fluid from the remote power steering fluid reservoir as possible.
3. Compress the power steering gear inlet hose clamp (1).
4. Disconnect the power steering gear inlet hose (2) from the remote power steering fluid reservoir.
5. Compress the power steering fluid cooler hose clamp (1).
6. Disconnect the power steering fluid cooler hose (2) from the remote power steering fluid reservoir.
7. Remove the remote power steering fluid reservoir nuts (1).
8. Remove the remote power steering fluid reservoir (2).

1. Position the remote power steering fluid reservoir (2) to the vehicle.
2. Install the remote power steering fluid reservoir nuts (1) and tighten to 9 N.m (80 lb in).
3. Compress the power steering fluid cooler hose clamp (1).
4. Connect the power steering fluid cooler hose (2) to the remote power steering fluid reservoir and release the clamp.
5. Compress the power steering gear inlet hose clamp (1).
6. Connect the power steering gear inlet hose (2) to the remote power steering fluid reservoir and release the clamp.
7. Clean any excess power steering fluid from the vehicle and remove the drain pans.
8. Fill and bleed the power steering fluid system. Refer to «Power Steering System Bleeding»(/chevrolet/corvette/c6-2004-2014/remont/manual-power-steering/#power-steering-system) .

1. J 25033-C: Pulley Installer
2. J 25034-C: Pulley Remover

For equivalent regional tools, refer to Special Tools .

1. Remove the accessory drive belt. Refer to «Drive Belt Replacement - Accessory (w/o LS9)»(/chevrolet/corvette/c6-2004-2014/remont/mechanical/#engine-mechanical-62l-or-70l-2-of-8) or «Drive Belt Replacement - Accessory (LS9)»(/chevrolet/corvette/c6-2004-2014/remont/mechanical/#engine-mechanical-62l-or-70l-2-of-8) .
2. Remove the brake pressure modulator valve (BPMV) bracket. Refer to «Brake Pressure Modulator Valve Bracket Replacement»(/chevrolet/corvette/c6-2004-2014/remont/anti-locktraction-control/#antilock-brake-system) .
3. Use the J 25034-C: remover to remove the power steering pump pulley.

1. Use the J 25033-C: installer to install the power steering pump pulley.
2. Check the position of the power steering pump pulley on the power steering pump.
3. Install the accessory drive belt. Refer to «Drive Belt Replacement - Accessory (w/o LS9)»(/chevrolet/corvette/c6-2004-2014/remont/mechanical/#engine-mechanical-62l-or-70l-2-of-8) or «Drive Belt Replacement - Accessory (LS9)»(/chevrolet/corvette/c6-2004-2014/remont/mechanical/#engine-mechanical-62l-or-70l-2-of-8) .
4. Install the BPMV bracket. Refer to «Brake Pressure Modulator Valve Bracket Replacement»(/chevrolet/corvette/c6-2004-2014/remont/anti-locktraction-control/#antilock-brake-system) .

Scheme 3

1. Remove the power steering pump pulley. Refer to «Power Steering Pump Pulley Replacement (LS3, LS7)»(/chevrolet/corvette/c6-2004-2014/remont/manual-power-steering/#power-steering-system) or «Power Steering Pump Pulley Replacement (LS9)»(/chevrolet/corvette/c6-2004-2014/remont/manual-power-steering/#power-steering-system) .
2. Remove the remote power steering fluid reservoir. Refer to «Power Steering Fluid Reservoir Replacement (LS3, LS7)»(/chevrolet/corvette/c6-2004-2014/remont/manual-power-steering/#power-steering-system) or «Power Steering Fluid Reservoir Replacement (LS9)»(/chevrolet/corvette/c6-2004-2014/remont/manual-power-steering/#power-steering-system) .
3. Disconnect the power steering fluid reservoir outlet hose from the power steering pump. Refer to «Power Steering Fluid Reservoir Outlet Hose Replacement (LS3, LS7)»(/chevrolet/corvette/c6-2004-2014/remont/manual-power-steering/#power-steering-system) .
4. Disconnect the power steering pressure hose from the power steering pump. Refer to «Power Steering Pressure Pipe/Hose Replacement (LS3, LS7)»(/chevrolet/corvette/c6-2004-2014/remont/manual-power-steering/#power-steering-system) .
5. Remove the power steering pump bolts (3) from the power steering pump (2).
6. Remove the following components from the power steering pump rear bracket (1): The power steering pump front bracket (3) The power steering pump (2)

1. Install the following components to the power steering pump rear bracket (1): The power steering pump (2) The power steering pump front bracket (3)
2. Install the power steering pump bolts (4) to the power steering pump (2) and tighten to 25 N.m (18 lb ft).
3. Connect the power steering fluid reservoir outlet hose to the power steering pump. Refer to «Power Steering Fluid Reservoir Outlet Hose Replacement (LS3, LS7)»(/chevrolet/corvette/c6-2004-2014/remont/manual-power-steering/#power-steering-system) .
4. Connect the power steering pressure hose to the power steering pump. Refer to «Power Steering Pressure Pipe/Hose Replacement (LS3, LS7)»(/chevrolet/corvette/c6-2004-2014/remont/manual-power-steering/#power-steering-system) .
5. Install the power steering fluid reservoir. Refer to «Power Steering Fluid Reservoir Replacement (LS3, LS7)»(/chevrolet/corvette/c6-2004-2014/remont/manual-power-steering/#power-steering-system) or «Power Steering Fluid Reservoir Replacement (LS9)»(/chevrolet/corvette/c6-2004-2014/remont/manual-power-steering/#power-steering-system) .
6. Install the power steering pump pulley. Refer to «Power Steering Pump Pulley Replacement (LS3, LS7)»(/chevrolet/corvette/c6-2004-2014/remont/manual-power-steering/#power-steering-system) or «Power Steering Pump Pulley Replacement (LS9)»(/chevrolet/corvette/c6-2004-2014/remont/manual-power-steering/#power-steering-system) .
7. Fill and bleed the power steering system. Refer to «Power Steering System Bleeding»(/chevrolet/corvette/c6-2004-2014/remont/manual-power-steering/#power-steering-system) .

1. Remove the left side valve rocker arm cover. Refer to «Valve Rocker Arm Cover Replacement - Left Side (without LS9)»(/chevrolet/corvette/c6-2004-2014/remont/mechanical/#engine-mechanical-62l-or-70l-2-of-8) or «Valve Rocker Arm Cover Replacement - Left Side (LSA/LS9)»(/chevrolet/corvette/c6-2004-2014/remont/mechanical/#engine-mechanical-62l-or-70l-2-of-8) .
2. Place drain pans under the vehicle as needed.
3. Remove as much power steering fluid from the remote power steering fluid reservoir as possible.
4. Disconnect the power steering gear inlet hose (1) from the power steering pump.
5. Compress the power steering fluid reservoir inlet hose clamp (1).
6. Disconnect the power steering fluid reservoir inlet hose (2) from the power steering pump.
7. Remove the power steering pump bolts (1).
8. Remove the power steering pump (2).

1. Position the power steering pump (2) into the power steering pump housing.
2. Install the power steering pump bolts and tighten to 50 N.m (37 lb ft).
3. Compress the power steering fluid reservoir inlet hose clamp (1).
4. Connect the power steering fluid reservoir inlet hose (2) to the power steering pump and release the clamp.
5. Connect the power steering gear inlet hose (1) to the power steering pump and tighten to 27 N.m (20 lb ft).
6. Install the left side valve rocker arm cover. Refer to «Valve Rocker Arm Cover Replacement - Left Side (without LS9)»(/chevrolet/corvette/c6-2004-2014/remont/mechanical/#engine-mechanical-62l-or-70l-2-of-8) or «Valve Rocker Arm Cover Replacement - Left Side (LSA/LS9)»(/chevrolet/corvette/c6-2004-2014/remont/mechanical/#engine-mechanical-62l-or-70l-2-of-8) .
7. Clean any excess power steering fluid from the vehicle and remove the drain pans.
8. Fill and bleed the power steering system. Refer to «Power Steering System Bleeding»(/chevrolet/corvette/c6-2004-2014/remont/manual-power-steering/#power-steering-system) .

1. Remove the power steering pump pulley. Refer to «Power Steering Pump Pulley Replacement (LS3, LS7)»(/chevrolet/corvette/c6-2004-2014/remont/manual-power-steering/#power-steering-system) or «Power Steering Pump Pulley Replacement (LS9)»(/chevrolet/corvette/c6-2004-2014/remont/manual-power-steering/#power-steering-system) .
2. Place drain pans under the vehicle as needed.
3. Remove as much power steering fluid from the remote power steering fluid reservoir as possible.
4. Disconnect the power steering gear inlet hose (1) from the power steering pump.
5. Compress the power steering fluid reservoir inlet hose clamp (1).
6. Disconnect the power steering fluid reservoir inlet hose (2) from the power steering pump.
7. Remove the power steering pump bracket bolts (1).
8. Remove the power steering pump bracket (2).
9. Transfer the power steering pump if necessary. Refer to «Power Steering Pump Replacement (LS3, LS7)»(/chevrolet/corvette/c6-2004-2014/remont/manual-power-steering/#power-steering-system) or «Power Steering Pump Replacement (LS9)»(/chevrolet/corvette/c6-2004-2014/remont/manual-power-steering/#power-steering-system) .

1. Position the power steering pump bracket (2) to the vehicle.
2. Install the power steering pump bracket bolts (1) and tighten to 50 N.m (37 lb ft).
3. Compress the power steering fluid reservoir inlet hose clamp (1).
4. Connect the power steering fluid reservoir inlet hose (2) to the power steering pump and release the clamp.
5. Connect the power steering gear inlet hose (1) to the power steering pump and tighten to 27 N.m (20 lb ft).
6. Install the power steering pump pulley. Refer to «Power Steering Pump Pulley Replacement (LS3, LS7)»(/chevrolet/corvette/c6-2004-2014/remont/manual-power-steering/#power-steering-system) or «Power Steering Pump Pulley Replacement (LS9)»(/chevrolet/corvette/c6-2004-2014/remont/manual-power-steering/#power-steering-system) .
7. Clean any excess power steering fluid from the vehicle and remove the drain pans.
8. Fill and bleed the power steering system. Refer to «Power Steering System Bleeding»(/chevrolet/corvette/c6-2004-2014/remont/manual-power-steering/#power-steering-system) .

J 42188 Ball Joint Separator

1. Raise and suitably support the vehicle. Refer to «Lifting and Jacking the Vehicle»(/chevrolet/corvette/c6-2004-2014/remont/hoistjack/#general-information__lifting-and-jacking-the-vehicle) .
2. Remove the tire and wheel assemblies. Refer to «Tire and Wheel Removal and Installation»(/chevrolet/corvette/c6-2004-2014/remont/wheel-tire-system/#tires-and-wheels) .
3. Loosen, do not remove, the outer tie rod end stud nut (2) from the outer tie rod end ball stud.
4. Install J 42188 between the steering knuckle and the outer tie rod end stud.
5. Tighten the nut on J 42188 until the steering knuckle and the outer tie rod end stud separate.
6. Remove J 42188 and the outer tie rod end stud nut.
7. Remove the outer tie rod end stud (5) from the steering knuckle (4).
8. Loosen the jam nut (2) on the inner tie rod assembly.
9. Remove the outer tie rod end (5) from the inner tie rod assembly (1).

1. Install the outer tie rod end (5) to the inner tie rod assembly (1). Do not tighten the jam nut.
2. Install the outer tie rod end stud (5) to the steering knuckle (4).
3. Install the outer tie rod end stud nut (3) to the outer tie rod end stud (5). Tighten: Tighten the outer tie rod end stud nut to 30 N.m (22 lb ft) to seat the stud. Turn the nut an additional 120 degrees.
4. Install the tire and wheel assemblies. Refer to «Tire and Wheel Removal and Installation»(/chevrolet/corvette/c6-2004-2014/remont/wheel-tire-system/#tires-and-wheels) .
5. Lower the vehicle.
6. Adjust the wheel toe. Refer to «Wheel Alignment - Steering Wheel Angle and/or Front Toe Adjustment»(/chevrolet/corvette/c6-2004-2014/remont/wheel-alignment/#wheel-alignment-system__wheel-alignment-steering-wheel-angle) .

Tools Required

J 22610 Keystone Clamp Pliers. See Special Tools .

1. Remove the outer tie rod. Refer to «Steering Linkage Outer Tie Rod Replacement»(/chevrolet/corvette/c6-2004-2014/remont/manual-power-steering/#power-steering-system) .
2. Remove the nut (5) from the inner tie rod assembly.
3. Remove the tie rod clamp (4).
4. Use side cutters to remove the boot clamp (2).
5. Discard the boot clamp.
6. Remove the rack and pinion boot (3).

1. Install the new boot clamp (2) onto the rack and pinion boot (3).
2. Apply grease to the inner rod (2) and apply grease to the gear assembly (1) prior to the boot (3) installation.
3. Install the boot (3) onto the inner tie rod assembly.
4. Install the boot (3) onto the gear assembly (1) until the boot is seated in the gear assembly groove.
5. Install the boot clamp on the boot (1) using tool J 22610 (2). See «Special Tools»(/chevrolet/corvette/c6-2004-2014/remont/manual-power-steering/#power-steering-system) .
6. Crimp the boot clamp (2).
7. Install the tie rod end clamp on the boot using pliers.
8. Install the jam nut to the inner tie rod assembly.
9. Install the outer tie rod. Refer to «Steering Linkage Outer Tie Rod Replacement»(/chevrolet/corvette/c6-2004-2014/remont/manual-power-steering/#power-steering-system) .

J 34028 Inner Tie Rod Wrench. See Special Tools .

1. Raise the vehicle. Support the vehicle with suitable safety stands.
2. Remove the tire and wheel assembly from the vehicle. Refer to «Tire and Wheel Removal and Installation»(/chevrolet/corvette/c6-2004-2014/remont/wheel-tire-system/#tires-and-wheels) .
3. Remove the rack and pinion boot. Refer to «Rack and Pinion Boot Replacement»(/chevrolet/corvette/c6-2004-2014/remont/manual-power-steering/#power-steering-system) .
4. Remove the shock dampener (2) from the inner tie rod (5).
5. Slide the shock dampener (2) back onto the rack (1). NOTE: Do not hold the steering rack while removing the inner tie rod if the preload adjustment has not been changed.
6. Remove the inner tie rod (5) from the rack assembly (1) as follows: Place a wrench on the flats of the inner tie rod housing (4). Rotate the inner tie rod housing (4) counterclockwise until the inner tie rod (5) separates from the rack.
7. Remove the old LOCTITE® from the threads (2) of the rack (1) and the inner tie rod (3).

1. Apply LOCTITE® 262, or equivalent, to the inner tie rod threads (2).
2. Install the inner tie rod (3) to the rack and pinion (1).
3. Install a torque wrench (5) to the J 34028 to tighten the inner tie rod. See «Special Tools»(/chevrolet/corvette/c6-2004-2014/remont/manual-power-steering/#power-steering-system) . Hold the rack (3) while tightening the tie rod (4) as shown. Tighten: Tighten the inner tie rod (6) to 100 N.m (74 lb ft).
4. Slide the shock dampener (2) over the inner tie rod housing (3) until the front lip of the shock dampener bottoms out against the inner tie rod housing.
5. Install the rack and pinion boot. Refer to «Rack and Pinion Boot Replacement»(/chevrolet/corvette/c6-2004-2014/remont/manual-power-steering/#power-steering-system) .
6. Install the tire and wheel assembly to the vehicle. Refer to «Tire and Wheel Removal and Installation»(/chevrolet/corvette/c6-2004-2014/remont/wheel-tire-system/#tires-and-wheels) .
7. Remove the safety stands.
8. Lower the vehicle.
9. Check the wheel alignment. Refer to «Wheel Alignment Measurement»(/chevrolet/corvette/c6-2004-2014/remont/wheel-alignment/#wheel-alignment-system__wheel-alignment-measurement) .

1. Place drain pans under the vehicle as needed.
2. Remove as much power steering fluid from the remote power steering fluid reservoir as possible.
3. Compress the power steering cooler hose clamp (1).
4. Disconnect the power steering cooler hose (2) from the remote power steering fluid reservoir.
5. Disconnect the power steering cooler hose (1) from the steering gear.
6. Remove the power steering cooler hose bracket bolt (1).
7. Remove and discard the power steering cooler hose clamps (2).
8. Disconnect the rubber hoses (3) from the power steering cooler (1).
9. Remove the power steering cooler hose bolts (1) and the power steering cooler (2).
10. Maneuver the power steering cooler hose as needed and remove it from the vehicle.

1. Maneuver the power steering cooler hose as needed and position it to the vehicle.
2. Install the power steering cooler (2) and the power steering cooler hose bolts (1) and tighten to 11 N.m (97 lb in).
3. Install the power steering cooler hose bracket bolt (1) and tighten to 10 N.m (89 lb in).
4. Connect the power steering cooler hose (1) to the steering gear and tighten to 27 N.m (20 lb ft).
5. Position the new power steering cooler hose clamps (2) and connect the rubber hoses (3) to the power steering cooler (1).
6. Tighten the new power steering cooler hose clamps (2).
7. Compress the power steering cooler hose clamp (1).
8. Connect the power steering cooler hose (2) to the remote power steering fluid reservoir and release the clamp.
9. Clean any excess power steering fluid from the vehicle and remove the drain pans.
10. Fill and bleed the power steering system. Refer to «Power Steering System Bleeding»(/chevrolet/corvette/c6-2004-2014/remont/manual-power-steering/#power-steering-system) .

1. Place drain pans under the vehicle as needed.
2. Remove as much power steering fluid from the remote power steering fluid reservoir as possible.
3. Compress the power steering fluid reservoir inlet hose clamp (1).
4. Disconnect the power steering fluid reservoir inlet hose (2) from the remote power steering fluid reservoir.
5. Compress the power steering fluid reservoir inlet hose clamp (1).
6. Disconnect the power steering fluid reservoir inlet hose (2) from the power steering pump.
7. Remove the power steering fluid reservoir inlet hose from the vehicle.

1. Position the power steering fluid reservoir inlet hose (2) to the vehicle.
2. Compress the power steering fluid reservoir inlet hose clamp (1).
3. Connect the power steering fluid reservoir inlet hose (2) to the power steering pump and release the clamp.
4. Compress the power steering fluid reservoir inlet hose clamp (1).
5. Connect the power steering fluid reservoir inlet hose (2) to the remote power steering fluid reservoir and release the clamp.
6. Clean any excess power steering fluid from the vehicle and remove the drain pans.
7. Fill and bleed the power steering system. Refer to «Power Steering System Bleeding»(/chevrolet/corvette/c6-2004-2014/remont/manual-power-steering/#power-steering-system) .

1. Place drain pans under the vehicle as needed.
2. Remove as much power steering fluid from the remote power steering fluid reservoir as possible.
3. Remove the clamp retaining the power steering fluid reservoir outlet hose (2) to the power steering pump (3).
4. Remove the clamp retaining the power steering fluid reservoir outlet hose (2) to the remote power steering fluid reservoir (1).
5. Remove the power steering fluid reservoir outlet hose (2) from the vehicle.

1. Position the power steering fluid reservoir outlet hose (2) to the vehicle.
2. Install the power steering fluid reservoir outlet hose (2) to the remote power steering fluid reservoir (1).
3. Install the remote power steering fluid outlet hose (2) to the power steering pump (3).
4. Install the remote power steering fluid reservoir outlet hose clamps.
5. Fill and bleed the power steering system. Refer to «Power Steering System Bleeding»(/chevrolet/corvette/c6-2004-2014/remont/manual-power-steering/#power-steering-system) .

1. Place drain pans under the vehicle as needed.
2. Remove the power steering pump pulley. Refer to «Power Steering Pump Pulley Replacement (LS3, LS7)»(/chevrolet/corvette/c6-2004-2014/remont/manual-power-steering/#power-steering-system) or «Power Steering Pump Pulley Replacement (LS9)»(/chevrolet/corvette/c6-2004-2014/remont/manual-power-steering/#power-steering-system) .
3. Disconnect the power steering pressure hose (2) from the power steering pump (1).
4. Disconnect the power steering pressure hose (2) from the steering gear.
5. Remove the power steering pressure hose (2) from the vehicle.

1. Position the power steering pressure hose (2) to the vehicle.
2. Connect the power steering pressure hose (2) to the power steering gear and tighten the fitting to 27 N.m (20 lb ft).
3. Connect the power steering pressure hose (2) to the power steering pump (1) and tighten the fitting to 27 N.m (20 lb ft).
4. Install the power steering pump pulley. Refer to «Power Steering Pump Pulley Replacement (LS3, LS7)»(/chevrolet/corvette/c6-2004-2014/remont/manual-power-steering/#power-steering-system) or «Power Steering Pump Pulley Replacement (LS9)»(/chevrolet/corvette/c6-2004-2014/remont/manual-power-steering/#power-steering-system) .
5. Clean any excess power steering fluid from the vehicle and remove the drain pans.
6. Fill and bleed the power steering system. Refer to «Power Steering System Bleeding»(/chevrolet/corvette/c6-2004-2014/remont/manual-power-steering/#power-steering-system) .

1. Place drain pans under the vehicle as needed.
2. Remove as much power steering fluid from the remote power steering fluid reservoir as possible.
3. Disconnect the power steering return hose (2) from the remote power steering fluid reservoir.
4. Raise the vehicle on a hoist. Refer to «Lifting and Jacking the Vehicle»(/chevrolet/corvette/c6-2004-2014/remont/hoistjack/#general-information__lifting-and-jacking-the-vehicle) .
5. Disconnect the power steering return hose (2) from the power steering gear (1).
6. Remove the power steering return hose mounting bolts (3) from the crossmember (4).
7. Remove the power steering return hose (2) from the vehicle.

1. Position the power steering return hose (2) to the vehicle.
2. Install the power steering return hose mounting bolts (3) to the crossmember (4) and tighten to 11 N.m (97 lb in).
3. Connect the power steering return hose (2) to the steering gear (1) and tighten to 27 N.m (20 lb ft).
4. Connect the power steering return hose (2) to the remote power steering fluid reservoir.
5. Fill and bleed the power steering system. Refer to «Power Steering System Bleeding»(/chevrolet/corvette/c6-2004-2014/remont/manual-power-steering/#power-steering-system) .

1. Place drain pans under the vehicle as needed.
2. Disconnect the power steering gear inlet hose (1) from the power steering pump.
3. Disconnect the power steering gear inlet hose (1) from the steering gear.
4. Maneuver the power steering gear inlet hose as needed and remove it from the vehicle.

1. Maneuver the power steering gear inlet hose as needed and position it to the vehicle.
2. Connect the power steering gear inlet hose (1) to the steering gear and tighten to 27 N.m (20 lb ft).
3. Connect the power steering gear inlet hose (1) to the power steering pump.
4. Clean any excess power steering fluid from the vehicle and remove the drain pans.
5. Fill and bleed the power steering system. Refer to «Power Steering System Bleeding»(/chevrolet/corvette/c6-2004-2014/remont/manual-power-steering/#power-steering-system) .

J 33432-A: Leaf Spring Compressor

1. Raise and support the vehicle. Refer to «Lifting and Jacking the Vehicle»(/chevrolet/corvette/c6-2004-2014/remont/hoistjack/#general-information__lifting-and-jacking-the-vehicle) .
2. Remove the tire and wheel assemblies. Refer to «Tire and Wheel Removal and Installation»(/chevrolet/corvette/c6-2004-2014/remont/wheel-tire-system/#tires-and-wheels) .
3. Disconnect the tie rod ends from the steering knuckles. Refer to «Steering Linkage Outer Tie Rod Replacement»(/chevrolet/corvette/c6-2004-2014/remont/manual-power-steering/#power-steering-system) .
4. Disconnect the intermediate shaft from the power steering gear. Refer to «Intermediate Steering Shaft Replacement»(/chevrolet/corvette/c6-2004-2014/remont/steering-column-switches/#steering-wheel-and-steering-column) .
5. Remove the stabilizer shaft. Refer to «Stabilizer Shaft Replacement»(/chevrolet/corvette/c6-2004-2014/remont/suspension-front/#front-suspension-system) .
6. Remove the power steering pressure and return hoses from the power steering gear.
7. Remove the power steering line hold-downs from the crossmember.
8. Remove the brake pressure modulator valve (BPMV) bracket. Refer to «Brake Pressure Modulator Valve Bracket Replacement»(/chevrolet/corvette/c6-2004-2014/remont/anti-locktraction-control/#antilock-brake-system) .
9. Remove the 2 front crossmember mounting nuts.
10. Using hand tools only, LOOSEN, DO NOT REMOVE, the 2 rear crossmember mounting nuts 10 mm (0.394 in).
11. Disconnect the height sensor arm from the control arm.
12. Use a utility stand in order to support the front of the crossmember.
13. Using the J 33432-A: Compressor, compress the coil spring in order to allow the crossmember to lower enough to remove the power steering gear.
14. Remove the lower shock mounting bolts.
15. Remove the brake pipe bracket for the left front brake caliper from the crossmember.
16. Remove the plastic brake pipe hold-down for the right front brake pipe.
17. Remove the power steering gear mounting bolts (3) and nuts (2).
18. Maneuver the power steering gear (1) around the brake lines. Remove the power steering gear from the vehicle through the left wheelhouse opening.

1. Install the power steering gear (1) into the vehicle through the left wheelhouse opening.
2. Install the power steering gear mounting bolts (3) and nuts (2) and tighten the nuts to 100 N.m (74 lb ft).
3. Install the lower shock mounting bolts. Refer to «Shock Absorber Replacement (With F55)»(/chevrolet/corvette/c6-2004-2014/remont/suspension-front/#front-suspension-system) or «Shock Absorber Replacement (w/o F55)»(/chevrolet/corvette/c6-2004-2014/remont/suspension-front/#front-suspension-system) .
4. Raise the crossmember with the utility stand and remove the J 33432-A: Compressor.
5. Install all of the crossmember mounting nuts and tighten to 110 N.m (81 lb ft).
6. Install the brake pipe bracket for the left front brake caliper.
7. Install the plastic brake pipe hold-down for the right front brake pipe.
8. Install the brake BPMV bracket. Refer to «Brake Pressure Modulator Valve Bracket Replacement»(/chevrolet/corvette/c6-2004-2014/remont/anti-locktraction-control/#antilock-brake-system) .
9. Install the power steering pressure hose to the power steering gear and tighten the fittings to 27 N.m (20 lb ft).
10. Install the power steering return hose to the power steering gear and tighten the fittings to 27 N.m (20 lb ft).
11. Install the power steering hold-downs to the crossmember.
12. Install the stabilizer shaft to the crossmember. Refer to «Stabilizer Shaft Replacement»(/chevrolet/corvette/c6-2004-2014/remont/suspension-front/#front-suspension-system) .
13. Connect the intermediate shaft to the power steering gear. Refer to «Intermediate Steering Shaft Replacement»(/chevrolet/corvette/c6-2004-2014/remont/steering-column-switches/#steering-wheel-and-steering-column) .
14. Connect the height sensor arm to the control arm.
15. Connect the tie rod ends to the steering knuckles. Refer to «Steering Linkage Outer Tie Rod Replacement»(/chevrolet/corvette/c6-2004-2014/remont/manual-power-steering/#power-steering-system) .
16. Install the tire and wheel assemblies. Refer to «Tire and Wheel Removal and Installation»(/chevrolet/corvette/c6-2004-2014/remont/wheel-tire-system/#tires-and-wheels) .
17. Lower the vehicle.
18. Bleed the power steering system. Refer to «Power Steering System Bleeding»(/chevrolet/corvette/c6-2004-2014/remont/manual-power-steering/#power-steering-system) .
19. Adjust the front wheel toe. Refer to «Wheel Alignment - Steering Wheel Angle and/or Front Toe Adjustment»(/chevrolet/corvette/c6-2004-2014/remont/wheel-alignment/#wheel-alignment-system__wheel-alignment-steering-wheel-angle) .

The hydraulic power steering pump is a constant displacement vane-type pump that provides hydraulic pressure and flow for the power steering gear. The hydraulic power steering pumps are either belt-driven or direct-drive, cam-driven.

The power steering fluid reservoir holds the power steering fluid and may be integral with the power steering pump or remotely located. The following locations are typical locations for the remote reservoir

1. Mounted to the front of the dash panel
2. Mounted to the inner fender
3. Mounted to a bracket on the engine

The 2 basic types of power steering gears are listed below

1. A recirculating ball system
2. A rack and pinion system

In the recirculating ball system, a worm gear converts steering wheel movement to movement of a sector shaft. A pitman arm attached to the bottom of the sector shaft actually moves one tie rod and an intermediate rod move the other tie rod.

In the rack and pinion system, the rack and the pinion are the 2 components that convert steering wheel rotation to lateral movement. The steering shaft is attached to the pinion in the steering gear. The pinion rotates with the steering wheel. Gear teeth on the pinion mesh with the gear teeth on the rack. The rotating pinion moves the rack from side to side. The lateral action of the rack pushes and pulls the tie rods in order to change the direction of the vehicle's front wheels.

The power steering pressure hose connects the power steering pump union fitting to the power steering gear and allows pressurized power steering fluid to flow from the pump to the gear.

The power steering return hose returns fluid from the power steering gear back to the power steering fluid reservoir. The power steering return line may contain an integral fin-type or line-type power steering fluid cooler.

In a typical power steering system, a pump generates hydraulic pressure, causing fluid to flow, via the pressure hose, to the steering gear valve assembly. The steering gear valve assembly regulates the incoming fluid to the right and left chambers in order to assist in right and left turns.

Turning the steering wheel activates the valve assembly, which applies greater fluid pressure and flow to 1 side of the steering gear piston, and lower pressure and flow to the other side of the piston. The pressure assists the movement of the gear piston. Tie rods transfer this force to the front wheels, which turn the vehicle right or left.

Variable Effort Steering System Description and Operation

The Variable Effort Steering (VES) system, or MAGNASTEER II® varies the amount of effort required to steer the vehicle as vehicle speed changes or lateral acceleration occurs. At low speeds, the system provides minimal steering effort for easy turning and parking maneuvers. At high speeds, the system provides firmer steering (road feel) and directional stability. When the system senses lateral acceleration, steering becomes firmer to reduce oversteering. The Electronic Brake Control Module (EBCM) controls a bi-directional magnetic rotary actuator located in the steering rack and pinion. The EBCM varies the steering assist by adjusting the current flow through the actuator. The actuator adjusts the amount of power steering assist to achieve a given level of effort to steer the vehicle. The VES system accomplishes this by adding or subtracting torque on the input shaft to the rack and pinion. The main component of the system is an electromagnetic actuator, which consists of a multiple-pole ring-style permanent magnet, a pole piece, and an electromagnetic coil assembly. The VES system uses the Antilock Brake System (ABS) wheel speed sensor inputs to determine vehicle speed. When the EBCM senses vehicle speed, it commands a current to the actuator that is most appropriate for each speed. The system also uses inputs such as Handwheel position, wheelbase, understeer coefficient and steering ratio to calculate lateral acceleration. The EBCM commands current from negative two amps to positive three amps to the actuator, which is polarized. At low speeds, a negative current is commanded, which assists steering. At medium speeds, no current is commanded and steering is assisted by hydraulics only. At high speeds, a positive current is commanded, which creates steering resistance. Ignition voltage and ground are provided through the EBCM. The EBCM has the ability to detect malfunctions in the actuator or the circuitry to the actuator. Any malfunctions detected will cause the system to ramp to zero amps and steering will be assisted by hydraulics only.

Illustration Tool Number/Description J 22610 Keystone Clamp Pliers J 25033-C Pulley Installer J 25034-C Pulley Remover J 33432-A Leaf Spring Compressor J 34028 Inner Tie Rod Wrench J 39570 Chassis Ear J 42188 Ball Joint Separator J 44721 Power Steering Analyzer

Scheme 4

Scheme 5

Scheme 6

Scheme 7

See also:
• Diagnostic System Check - Vehicle
• Strategy Based Diagnosis
• Diagnostic Procedure Instructions
• Component Connector End Views
• Testing for Intermittent Conditions and Poor Connections
• Circuit Testing
• Control Module References
• Diagnostic Repair Verification
• Steering Wheel in the Full Turn Position Caution
• Drive Belt Replacement - Accessory (w/o LS9)
• Diagnostic Starting Point - Suspension General Diagnosis
• Intermediate Steering Shaft Replacement
• Lifting and Jacking the Vehicle
• Tire and Wheel Removal and Installation
• Wheel Alignment Measurement
• Fluid and Lubricant Recommendations
• Fastener Caution
• Brake Pressure Modulator Valve Bracket Replacement
• Wheel Alignment - Steering Wheel Angle and/or Front Toe Adjustment
• Stabilizer Shaft Replacement
• DTC C0450
• Variable Effort Steering System Description and Operation
• Power Steering Fluid Leaks
• Checking and Adding Power Steering Fluid
• Steering Effort Hard or Too Easy in One or Both Directions
• Power Steering Pump Specifications
• Fastener Tightening Specifications