Power Steering System Chevrolet Malibu VIII

Fastener Tightening Specifications

Fastener Tightening Specifications

Power Steering Pump Specifications

Power Steering Pump Specifications

Scheme 1

Scheme 2

Scheme 3

Scheme 4

Scheme 5

Diagnostic Code Index

DIAGNOSTIC CODE INDEX

Diagnostic Instructions

1. Perform the «Diagnostic System Check - Vehicle»(/chevrolet/malibu/viii-2011-2014/remont/oem-general-information/#vehicle-diagnostic-information) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/chevrolet/malibu/viii-2011-2014/remont/oem-general-information/#vehicle-diagnostic-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(/chevrolet/malibu/viii-2011-2014/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

Circuit/System Description

The power steering control module (PSCM) receives a vehicle speed message from the engine control module (ECM) via the serial data circuit. The PSCM uses this vehicle speed message, and other inputs, to determine the desired amount of steering assist. At lower speeds, more assist is provided for easy turning during parking maneuvers. At higher speeds, less assist is provided for improved road feel and directional stability.

Conditions for Running the DTC

1. The ignition is ON.
2. DTC U2100, U2105, 2107, or U2109 is not set.
3. Power steering system voltage is between 9-16 volts.

Conditions for Setting the DTC

The PSCM receives an invalid vehicle speed message from the ECM.

Action Taken When the DTC Sets

1. DTC C0000 71 is stored in memory.
2. The DIC displays the POWER STEERING warning message.
3. Steering assist is set to a default level.

Conditions for Clearing the DTC

1. A current DTC will clear when the malfunction is no longer present.
2. A history DTC will clear after 100 consecutive malfunction-free ignition cycles.

Diagnostic Aids

This DTC is for information only. As an aid to the technician, this DTC indicates that their are no problems in the PSCM. The ECM should be checked for a possible fault.

Reference Information

Schematic Reference

Power Steering Schematics

Connector End View Reference

COMPONENT CONNECTOR END VIEWS - INDEX

Description and Operation

Power Steering System Description and Operation (Hydraulic Power Steering) , Power Steering System Description and Operation (Electronic Power Steering)

Electrical Information Reference

1. «Circuit Testing»(/chevrolet/malibu/viii-2011-2014/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures-and-connector-repair__circuit-testing)
2. «Connector Repairs»(/chevrolet/malibu/viii-2011-2014/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures-and-connector-repair__connector-repairs)
3. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/malibu/viii-2011-2014/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures-and-connector-repair__testing-for-intermittent-conditions-and-poor)
4. «Wiring Repairs»(/chevrolet/malibu/viii-2011-2014/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures-and-connector-repair__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

Circuit/System Verification

Verify that no DTCs are set in the ECM.

1. If DTCs are set, refer to «Diagnostic Trouble Code (DTC) List - Vehicle»(/chevrolet/malibu/viii-2011-2014/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-trouble-code-dtc-list) .

1. Perform the «Diagnostic System Check - Vehicle»(/chevrolet/malibu/viii-2011-2014/remont/oem-general-information/#vehicle-diagnostic-information) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/chevrolet/malibu/viii-2011-2014/remont/oem-general-information/#vehicle-diagnostic-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(/chevrolet/malibu/viii-2011-2014/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

The power steering control module (PSCM) monitors the temperature of the power steering system. The PSCM uses voltage, current levels and input from an internal temperature sensor to calculate an estimated system temperature. If the PSCM detects a high system temperature event is occurring, the amount of assist is reduced to lower system temperature to prevent thermal damage to the power steering components.

1. Engine Running.
2. Power steering system voltage is 9-16 volts.
3. Repetitive steering input is present.

The PSCM detects a high system temperature.

1. DTC C0176 54 is stored in memory.
2. Steering assist is reduced.

1. A current DTC will clear when the Power Steering System temperature returns to normal.
2. A history DTC will clear after 100 consecutive malfunction-free ignition cycles.

1. DTC C0176 54 does not indicate that a malfunction has occurred. Rather that the PSCM had to limit current to the power steering motor to avoid thermal damage to the Power Steering System components.
2. Inspect the under dash area around the steering column assembly. Ensure that no other components have come in contact with the power steering motor and module assembly, such as under dash insulation, or other electrical components.
3. Ensure that no steering components down stream of the power steering column assembly, such as ball joints, tie rod ends, universal joints, or the steering gear assembly, are mechanically binding.

Schematic Reference

Power Steering Schematics

Connector End View Reference

COMPONENT CONNECTOR END VIEWS - INDEX

Description and Operation

Power Steering System Description and Operation (Hydraulic Power Steering) , Power Steering System Description and Operation (Electronic Power Steering)

Electrical Information Reference

1. «Circuit Testing»(/chevrolet/malibu/viii-2011-2014/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures-and-connector-repair__circuit-testing)
2. «Connector Repairs»(/chevrolet/malibu/viii-2011-2014/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures-and-connector-repair__connector-repairs)
3. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/malibu/viii-2011-2014/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures-and-connector-repair__testing-for-intermittent-conditions-and-poor)
4. «Wiring Repairs»(/chevrolet/malibu/viii-2011-2014/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures-and-connector-repair__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

Verify that the DTC sets outside of the Conditions for Running and Setting. Since most occurrences of this DTC are caused by excessive driver inputs, review with the customer the conditions under which the DTC set.

1. If the DTC set within the Conditions for Running and Setting, the power steering is operating as designed.

1. Perform the «Diagnostic System Check - Vehicle»(/chevrolet/malibu/viii-2011-2014/remont/oem-general-information/#vehicle-diagnostic-information) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/chevrolet/malibu/viii-2011-2014/remont/oem-general-information/#vehicle-diagnostic-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(/chevrolet/malibu/viii-2011-2014/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

Diagnostic Fault Information

The steering wheel position sensor is a 5-volt dual analog device which is used to sense the steering systems center position to provide equal return to center and on center feel. The valid signal voltage range of the sensor is 0-5 volts. The sensors 2 signal voltages will increase and decrease within the valid signal voltage range and stay within a voltage range of each other as the steering wheel is turned.

After replacing the steering column or power steering control module (PSCM), the steering wheel torque and position sensors must be calibrated.

C0460 00

1. Engine running.
2. Power steering system voltage is 9-16 volts.
3. Slight amount of steering input.

C0460 4B

The ignition is ON.

C0460 00

The steering wheel position sensors signal 1 and signal 2 voltages are greater than 2.5 volts of each other.

C0460 4B

The PSCM has not undergone the steering position sensor calibration procedure.

1. DTC is stored in memory.
2. The DIC displays the POWER STEERING warning message.
3. Reduced steering assist performance.
4. Poor or no return to center.

C0460 00

1. A current DTC will clear when the malfunction is no longer present and the steering wheel has been turned 1 full revolution.
2. A history DTC will clear after 100 consecutive malfunction-free ignition cycles.

C0460 4B

1. A current DTC will clear after the sensor calibration procedure has been performed.
2. A history DTC will clear after 100 consecutive ignition cycles from when the sensor calibration procedure has been performed.

If the PSCM continues to set a history DTC C0460 replace the steering column before replacing the PSCM. Some steering columns may have an intermittent internal wiring condition causing the history DTC C0460.

If the Steering torque or position sensor calibrations are incorrect the customer may complain of steering effort that is easier in one direction than the other. Performing the steering torque and position sensor calibrations procedure will correct this issue.

Schematic Reference

Power Steering Schematics

Connector End View Reference

COMPONENT CONNECTOR END VIEWS - INDEX

Description and Operation

Power Steering System Description and Operation (Hydraulic Power Steering) , Power Steering System Description and Operation (Electronic Power Steering)

Electrical Information Reference

1. «Circuit Testing»(/chevrolet/malibu/viii-2011-2014/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures-and-connector-repair__circuit-testing)
2. «Connector Repairs»(/chevrolet/malibu/viii-2011-2014/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures-and-connector-repair__connector-repairs)
3. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/malibu/viii-2011-2014/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures-and-connector-repair__testing-for-intermittent-conditions-and-poor)
4. «Wiring Repairs»(/chevrolet/malibu/viii-2011-2014/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures-and-connector-repair__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

Special Tools

EL-47564 Power Steering Control Module (PSCM) Test Harness

C0460 00

1. Ignition ON, observe the scan tool Steering Wheel Position Sensor Signal 1 and 2 parameters. The readings should be between 0-5 V and change in opposite directions of each other while turning the steering wheel. Each parameter will increase from 0-5 V then decrease from 5-0 V while turning the steering wheel one complete revolution.
2. Center the steering wheel; observe the scan tool Steering Wheel Position parameter. The reading should be zero percent and display an increasing positive or negative value while turning the steering wheel off center. If the steering wheel position parameter is not at zero percent when centered or does not display an increasing positive or negative value while turning the steering wheel off center perform the steering torque and position sensor calibrations.

C0460 4B

Verify that DTC C0460 4B is not set.

1. If the DTC is set, perform the Steering Position Sensor Calibration procedure. If the DTC resets, replace the PSCM.

Steering torque and position sensor calibrations

1. Center the steering wheel. IMPORTANT: After centering the steering wheel, remove hands and other objects from the steering wheel and ensure the suspension is relaxed and no bias, or uneven force is being applied to the steering system.
2. Using the scan tool Perform the Steering Position Sensor Calibration procedure.
3. Using the scan tool Perform the Torque Sensor Calibration procedure.
4. Turn the steering wheel until it stops in each direction.

Circuit/System Testing

C0460 00

1. Disconnect the X3 harness connector at the power steering module assembly.
2. Connect the EL-47564 power steering control module (PSCM) test harness.
3. Ignition OFF, test for less than 2 ohms between the low reference circuit terminal E and ground. If greater than the specified range, replace the power steering control module.
4. Ignition ON, test for 4.8-5.2 V between the 5 V reference circuit terminal B and ground. If less than the specified range, replace the power steering control module.
5. Install a 3A fused jumper wire between the signal circuit terminal A and the 5V reference circuit terminal B. Verify the scan tool Steering Position Sensor Signal 1 is greater than 4.8V. If less than the specified value, replace the power steering control module.
6. Install a 3A fused jumper wire between the signal circuit terminal D and the 5V reference circuit terminal B. Verify the scan tool Steering Position Sensor Signal 2 is greater than 4.8V. If less than the specified value, replace the power steering control module.
7. If all circuits test normal, test or replace the steering column.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

1. «Steering Column Replacement (Electronic Power Steering)»(/chevrolet/malibu/viii-2011-2014/remont/steering-column-switches/#steering-wheel-and-steering-column) , «Steering Column Replacement (Hydraulic Power Steering)»(/chevrolet/malibu/viii-2011-2014/remont/steering-column-switches/#steering-wheel-and-steering-column)
2. «Control Module References»(/chevrolet/malibu/viii-2011-2014/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for PSCM replacement, setup, and programming

1. Perform the «Diagnostic System Check - Vehicle»(/chevrolet/malibu/viii-2011-2014/remont/oem-general-information/#vehicle-diagnostic-information) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/chevrolet/malibu/viii-2011-2014/remont/oem-general-information/#vehicle-diagnostic-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(/chevrolet/malibu/viii-2011-2014/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

The power steering control module (PSCM) continuously monitors the position of the power steering motor, the voltage and current levels commanded to it. It uses the motor position data to determine if a loss of mechanical coupling has occurred between the motor and the steering column shaft. The PSCM also compares the commanded and feedback current levels to detect malfunctions in the power steering motor.

1. Engine running.
2. Power steering system voltage is 9-16 volts.
3. Steering input is present.

C0475 00

A short to ground, short to voltage, or an open in the power steering motor, or the circuits to the motor.

C0475 64

The PSCM detects a motor position value that exceeds the mechanical travel limitation of the system, or more than 4.5 steering wheel revolutions.

1. The DTC is stored in memory.
2. The driver information center (DIC) displays the POWER STEERING warring message.
3. No steering assist is provided.

1. A current DTC will clear on the next malfunction-free ignition cycle.
2. A history DTC will clear after 100 consecutive malfunction-free ignition cycles.

If the intermediate shaft, or the steering gear coupler is disconnected during a previous repair, and the steering wheel is turned more than 4.5 revolutions with the engine ON, DTC C0475 64 will set.

Schematic Reference

Power Steering Schematics

Connector End View Reference

COMPONENT CONNECTOR END VIEWS - INDEX

Description and Operation

Power Steering System Description and Operation (Hydraulic Power Steering) , Power Steering System Description and Operation (Electronic Power Steering)

Electrical Information Reference

1. «Circuit Testing»(/chevrolet/malibu/viii-2011-2014/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures-and-connector-repair__circuit-testing)
2. «Connector Repairs»(/chevrolet/malibu/viii-2011-2014/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures-and-connector-repair__connector-repairs)
3. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/malibu/viii-2011-2014/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures-and-connector-repair__testing-for-intermittent-conditions-and-poor)
4. «Wiring Repairs»(/chevrolet/malibu/viii-2011-2014/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures-and-connector-repair__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

C0475 00

1. Ignition OFF, disconnect the X1 harness connector at the PSCM.
2. Test for less than 1ohms between the ground circuit terminal A and ground. If greater than the specified range, test the ground circuit for an open/high resistance. If the circuit tests normal, replace the PSCM.
3. Ignition ON, verify that a test lamp illuminates between the B+ circuit terminal B and ground. If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance.
4. If all circuits test normal, replace the PSCM.

C0475 64

1. Separate the power steering motor assembly from the steering column.
2. Verify no damage or separation to the rubber coupler is present. If separation or damage is present, replace the power steering motor assembly. If the motor assembly is OK, replace the steering column assembly.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

1. «Steering Column Replacement (Electronic Power Steering)»(/chevrolet/malibu/viii-2011-2014/remont/steering-column-switches/#steering-wheel-and-steering-column) , «Steering Column Replacement (Hydraulic Power Steering)»(/chevrolet/malibu/viii-2011-2014/remont/steering-column-switches/#steering-wheel-and-steering-column)
2. «Control Module References»(/chevrolet/malibu/viii-2011-2014/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for PSCM replacement, setup, and programming

1. Perform the «Diagnostic System Check - Vehicle»(/chevrolet/malibu/viii-2011-2014/remont/oem-general-information/#vehicle-diagnostic-information) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/chevrolet/malibu/viii-2011-2014/remont/oem-general-information/#vehicle-diagnostic-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(/chevrolet/malibu/viii-2011-2014/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

The steering column shaft torque sensor is a 5-volt dual analog inverse signal device which is used to sense steering direction and the amount of torque being applied to the steering column shaft when the steering wheel is turned. The valid signal voltage range of the sensor is 0.25-4.75 volts. When applying torque to the steering column shaft during a right turn, the sensors signal 1 voltage increases, while the signal 2 voltage decreases within the valid signal voltage range. When applying torque to the steering column shaft during a left turn, the sensors signal 1 voltage decreases, while the signal 2 voltage increases within the valid signal voltage range.

After replacing the steering column or power steering control module (PSCM), the steering wheel torque and position sensors must be calibrated.

C0545 00

1. Engine running
2. Steering column shaft torque input is present.

C0545 4B

The ignition is ON.

C0545 00

The torque sensors signal 1 and signal 2 voltages are less than 0.25 volts, or greater than 4.75 volts.

C0545 4B

The PSCM has not undergone the torque sensor calibration procedure.

1. DTC is stored in memory.
2. The DIC displays the POWER STEERING warning message.
3. No steering assist is provided.

C0545 00, C0545 4B

1. A current DTC will clear on the next malfunction-free ignition cycle.
2. A history DTC will clear after 100 consecutive malfunction-free ignition cycles.

If the PSCM continues to set a history DTC C0545 replace the steering column before replacing the PSCM. Some steering columns may have an intermittent internal wiring condition causing the history DTC C0545.

If the Steering torque or position sensor calibrations are incorrect the customer may complain of steering effort that is easier in one direction than the other. Performing the steering torque and position sensor calibrations procedure will correct this issue.

Schematic Reference

Power Steering Schematics

Connector End View Reference

COMPONENT CONNECTOR END VIEWS - INDEX

Description and Operation

Power Steering System Description and Operation (Hydraulic Power Steering) , Power Steering System Description and Operation (Electronic Power Steering)

Electrical Information Reference

1. «Circuit Testing»(/chevrolet/malibu/viii-2011-2014/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures-and-connector-repair__circuit-testing)
2. «Connector Repairs»(/chevrolet/malibu/viii-2011-2014/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures-and-connector-repair__connector-repairs)
3. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/malibu/viii-2011-2014/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures-and-connector-repair__testing-for-intermittent-conditions-and-poor)
4. «Wiring Repairs»(/chevrolet/malibu/viii-2011-2014/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures-and-connector-repair__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

Special Tools

EL-47564 Power Steering Control Module (PSCM) Test Harness

Note. Vehicles built between February 01, 2008 and March 03, 2008 with electronic power steering columns, may exhibit a repeated history DTC C0545 being set. If DTC C0545 is set as history and the customer has experienced or complained of inconsistent steering effort on any of these vehicles, replace the steering column.

C0545 00

Ignition ON, observe the scan tool Torque Sensor Signal 1 and 2 parameters. With the steering wheel at rest both readings should be at 2.5 V. While turning the steering wheel from side to side the readings should stay between 0.25-4.75 V and change in opposite directions of each other.

C0545 4B

Verify that DTC C0545 4B is not set.

1. If the DTC is set, perform the Torque Sensor Calibration procedure. If the DTC resets, replace the PSCM.

Steering torque and position sensor calibrations

1. Center the steering wheel. NOTE: After centering the steering wheel, remove hands and other objects from the steering wheel and ensure the suspension is relaxed and no bias, or uneven force is being applied to the steering system.
2. Using the scan tool Perform the Steering Position Sensor Calibration procedure.
3. Using the scan tool Perform the Torque Sensor Calibration procedure.
4. Turn the steering wheel until it stops in each direction.

C0545 00

1. Disconnect the X3 harness connector at the power steering module assembly.
2. Connect the EL-47564 test harness Power Steering Control Module (PSCM) Test Harness.
3. Ignition OFF, test for less than 2 ohms between the low reference circuit terminal E and ground. If greater than the specified range, replace the power steering control module.
4. Ignition ON, test for 4.8-5.2 V between the 5 V reference circuit terminal B and ground. If less than the specified range, replace the power steering control module.
5. Install a 3A fused jumper wire between the signal circuit terminal F and the 5V reference circuit terminal B. Verify the scan tool Torque Sensor Signal 1 is greater than 4.8V. If less than the specified value, replace the power steering control module.
6. Install a 3A fused jumper wire between the signal circuit terminal C and the 5V reference circuit terminal B. Verify the scan tool Torque Sensor Signal 2 is greater than 4.8V. If less than the specified value, replace the power steering control module.
7. If all circuits test normal, test or replace the steering column.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

1. «Steering Column Replacement (Electronic Power Steering)»(/chevrolet/malibu/viii-2011-2014/remont/steering-column-switches/#steering-wheel-and-steering-column) , «Steering Column Replacement (Hydraulic Power Steering)»(/chevrolet/malibu/viii-2011-2014/remont/steering-column-switches/#steering-wheel-and-steering-column)
2. «Control Module References»(/chevrolet/malibu/viii-2011-2014/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for PSCM replacement, setup, and programming

1. Perform the «Diagnostic System Check - Vehicle»(/chevrolet/malibu/viii-2011-2014/remont/oem-general-information/#vehicle-diagnostic-information) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/chevrolet/malibu/viii-2011-2014/remont/oem-general-information/#vehicle-diagnostic-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(/chevrolet/malibu/viii-2011-2014/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

After replacing the power steering control module (PSCM) it must be setup with the correct steering tuning.

The ignition is ON.

The PSCM has not undergone the steering tuning selection procedure.

1. DTC C0569 46 is stored in memory.
2. The driver information center (DIC) displays the POWER STEERING warning message.
3. The PSCM defaults to steering tuning 1.

1. A current DTC will clear after the PSCM has been setup with the correct steering tuning.
2. A history DTC will clear after 100 consecutive malfunction-free ignition cycles from when the PSCM has been setup.

A newly replaced PSCM will set DTC C0569 46 on its initial ignition ON cycle.

Schematic Reference

Power Steering Schematics

Connector End View Reference

COMPONENT CONNECTOR END VIEWS - INDEX

Description and Operation

Power Steering System Description and Operation (Hydraulic Power Steering) , Power Steering System Description and Operation (Electronic Power Steering)

Electrical Information Reference

1. «Circuit Testing»(/chevrolet/malibu/viii-2011-2014/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures-and-connector-repair__circuit-testing)
2. «Connector Repairs»(/chevrolet/malibu/viii-2011-2014/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures-and-connector-repair__connector-repairs)
3. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/malibu/viii-2011-2014/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures-and-connector-repair__testing-for-intermittent-conditions-and-poor)
4. «Wiring Repairs»(/chevrolet/malibu/viii-2011-2014/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures-and-connector-repair__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

C0460 4B

Verify that DTC C0569 46 is not set.

1. If the DTC is set, perform the PSCM setup procedure. If the DTC resets, replace the PSCM.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Control Module References for PSCM replacement, setup, and programming

1. Perform the «Diagnostic System Check - Vehicle»(/chevrolet/malibu/viii-2011-2014/remont/oem-general-information/#vehicle-diagnostic-information) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/chevrolet/malibu/viii-2011-2014/remont/oem-general-information/#vehicle-diagnostic-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(/chevrolet/malibu/viii-2011-2014/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-procedure-instructions) provide an overview of each diagnostic category.

The power steering control module (PSCM) has a discrete battery positive voltage supply circuit. The PSCM monitors the voltage level on this circuit to ensure the power steering system has adequate voltage levels to perform the system functions.

Ignition ON, Engine ON

Power steering system voltage is 9-10 volts for at least one second.

1. DTC C0896 00 is stored in memory.
2. Steering assist is slightly reduced.

1. A current DTC will clear when power steering system voltage is greater than 10 volts for more than one second.
2. A history DTC will clear after 100 consecutive ignition cycles with the power steering voltage greater than 10 volts.

1. Inspect the 80-amp EPS fuse of the underhood fuse block for an open.
2. Inspect for poor connections at the underhood fuse block stud ring terminal.
3. Inspect for poor connections at ground terminal G103 of the PSCM.
4. Inspect for poor connections at the PSCM.

Schematic Reference

Power Steering Schematics

Connector End View Reference

COMPONENT CONNECTOR END VIEWS - INDEX

Description and Operation

Power Steering System Description and Operation (Hydraulic Power Steering) , Power Steering System Description and Operation (Electronic Power Steering)

Electrical Information Reference

1. «Circuit Testing»(/chevrolet/malibu/viii-2011-2014/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures-and-connector-repair__circuit-testing)
2. «Connector Repairs»(/chevrolet/malibu/viii-2011-2014/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures-and-connector-repair__connector-repairs)
3. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/malibu/viii-2011-2014/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures-and-connector-repair__testing-for-intermittent-conditions-and-poor)
4. «Wiring Repairs»(/chevrolet/malibu/viii-2011-2014/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures-and-connector-repair__wiring-repairs)

Scan Tool Reference

Diagnostic System Check - Vehicle for scan tool information

1. Ignition OFF, disconnect the X1 harness connector at the PSCM.
2. Test for less than 1ohms between the ground circuit terminal A and ground. If greater than the specified range, test the ground circuit for an open/high resistance. If the circuit tests normal, replace the PSCM.
3. Ignition ON, verify that a test lamp illuminates between the B+ circuit terminal B and ground. If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance.
4. If all circuits test normal, replace the PSCM.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

1. «Control Module References»(/chevrolet/malibu/viii-2011-2014/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for PSCM replacement, setup, and programming
2. «Steering Column Replacement (Electronic Power Steering)»(/chevrolet/malibu/viii-2011-2014/remont/steering-column-switches/#steering-wheel-and-steering-column) , «Steering Column Replacement (Hydraulic Power Steering)»(/chevrolet/malibu/viii-2011-2014/remont/steering-column-switches/#steering-wheel-and-steering-column)

1. Perform the «Diagnostic System Check - Vehicle»(/chevrolet/malibu/viii-2011-2014/remont/oem-general-information/#vehicle-diagnostic-information) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/chevrolet/malibu/viii-2011-2014/remont/oem-general-information/#vehicle-diagnostic-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(/chevrolet/malibu/viii-2011-2014/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-procedure-instructions) provide an overview of each diagnostic category.

The power steering control module (PSCM) receives a power mode message from the body control module (BCM) via a serial data circuit. When a power mode ON message is received, the PSCM compares it to the state of its igniting voltage circuit.

Ignition ON.

1. The PSCM power mode message and the state of the ignition 1 circuit do not agree.
2. The PSCM ignition voltage circuit is shorted to ground, or open.
3. DTCs U2100, U2105, U2107, or U2109 are not set.

1. DTC C0897 00 is stored in memory.
2. The DIC displays the POWER STEERING warning message.
3. Steering assist is present for the remainder of the ignition cycle but will not be present on the following ignition ON cycle if the malfunction still exists.

1. A current DTC will clear when the malfunction is no longer present.
2. A history DTC will clear after 100 consecutive malfunction-free ignition cycles.

1. Inspect the 2-amp EPS fuse of the BCM for an open.
2. Inspect for a poor connection at the BCM.
3. Inspect for a poor connection at the PSCM.

Schematic Reference

Power Steering Schematics

Connector End View Reference

COMPONENT CONNECTOR END VIEWS - INDEX

Description and Operation

Power Steering System Description and Operation (Hydraulic Power Steering) , Power Steering System Description and Operation (Electronic Power Steering)

Electrical Information Reference

1. «Circuit Testing»(/chevrolet/malibu/viii-2011-2014/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures-and-connector-repair__circuit-testing)
2. «Connector Repairs»(/chevrolet/malibu/viii-2011-2014/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures-and-connector-repair__connector-repairs)
3. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/malibu/viii-2011-2014/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures-and-connector-repair__testing-for-intermittent-conditions-and-poor)
4. «Wiring Repairs»(/chevrolet/malibu/viii-2011-2014/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures-and-connector-repair__wiring-repairs)

Scan Tool Reference

Diagnostic System Check - Vehicle for scan tool information

1. Ignition OFF, disconnect the X2 harness connector at the PSCM.
2. Ignition ON, verify that a test lamp illuminates between the ignition circuit terminal 8 and ground. If the test lamp does not illuminate, test the ignition circuit for a short to ground or an open/high resistance.
3. If all circuits test normal, replace the PSCM.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

1. «Diagnostic System Check - Vehicle»(/chevrolet/malibu/viii-2011-2014/remont/oem-general-information/#vehicle-diagnostic-information) for PSCM replacement, setup, and programming
2. «Steering Column Replacement (Electronic Power Steering)»(/chevrolet/malibu/viii-2011-2014/remont/steering-column-switches/#steering-wheel-and-steering-column) , «Steering Column Replacement (Hydraulic Power Steering)»(/chevrolet/malibu/viii-2011-2014/remont/steering-column-switches/#steering-wheel-and-steering-column)

Note. Review the system description and operation in order to familiarize yourself with the system functions. Refer to Power Steering System Description and Operation (Hydraulic Power Steering) , Power Steering System Description and Operation (Electronic Power Steering) .

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.

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

1. «Rattle, Clunk, or Shudder Noise from the Power Steering System (Electronic Power Steering)»(/chevrolet/malibu/viii-2011-2014/remont/manual-power-steering/#power-steering-system) , «Rattle, Clunk, or Shudder Noise from the Power Steering System (Hydraulic Power Steering)»(/chevrolet/malibu/viii-2011-2014/remont/manual-power-steering/#power-steering-system)
2. «Increase in Effort While Turning Steering Wheel»(/chevrolet/malibu/viii-2011-2014/remont/manual-power-steering/#power-steering-system__increase-in-effort-while-turning-steering)
3. «Poor Return of Steering Wheel»(/chevrolet/malibu/viii-2011-2014/remont/manual-power-steering/#power-steering-system__poor-return-of-steering-wheel)
4. «Steering Wheel Surges/Jerks While Turning (Electronic Power Steering)»(/chevrolet/malibu/viii-2011-2014/remont/manual-power-steering/#power-steering-system__steering-wheel-surgesjerks-while-turning-electronic)
5. «Steering Wheel Kickback (Electronic Power Steering)»(/chevrolet/malibu/viii-2011-2014/remont/manual-power-steering/#power-steering-system__steering-wheel-kickback-electronic-power-steering)

Note. Review the system description and operation in order to familiarize yourself with the system functions. Refer to Power Steering System Description and Operation (Hydraulic Power Steering) , Power Steering System Description and Operation (Electronic Power Steering) .

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/malibu/viii-2011-2014/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/malibu/viii-2011-2014/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/malibu/viii-2011-2014/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/malibu/viii-2011-2014/remont/manual-power-steering/#power-steering-system__power-steering-fluid-leaks)
2. «Rattle, Clunk, or Shudder Noise from the Power Steering System (Electronic Power Steering)»(/chevrolet/malibu/viii-2011-2014/remont/manual-power-steering/#power-steering-system) , «Rattle, Clunk, or Shudder Noise from the Power Steering System (Hydraulic Power Steering)»(/chevrolet/malibu/viii-2011-2014/remont/manual-power-steering/#power-steering-system)
3. «Whine or Growl Noise from the Power Steering System (Hydraulic Power Steering)»(/chevrolet/malibu/viii-2011-2014/remont/manual-power-steering/#power-steering-system) , «Whine or Growl Noise from the Power Steering System (Electronic Power Steering)»(/chevrolet/malibu/viii-2011-2014/remont/manual-power-steering/#power-steering-system)
4. «Steering Effort Hard or Too Easy in One or Both Directions (Hydraulic Power Steering)»(/chevrolet/malibu/viii-2011-2014/remont/manual-power-steering/#power-steering-system__steering-effort-hard-or-too-easy) , «Steering Effort Hard or Too Easy in One or Both Directions (Electronic Power Steering)»(/chevrolet/malibu/viii-2011-2014/remont/manual-power-steering/#power-steering-system__steering-effort-hard-or-too-easy)

Scheme 6

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 System Test

Power Steering Fluid Leaks

Power Steering Fluid Leaks

Rattle, Clunk, or Shudder Noise from the Power Steering System (Electronic Power Steering)

Rattle, Clunk, or Shudder Noise from the Power Steering System (Hydraulic Power Steering)

Whine or Growl Noise from the Power Steering System (Electronic Power Steering)

Whine or Growl Noise from the Power Steering System (Hydraulic Power Steering)

Increase in Effort While Turning Steering Wheel

Increase in Effort While Turning Steering Wheel

Poor Return of Steering Wheel

Poor Return of Steering Wheel

Steering Wheel Surges/Jerks While Turning (Electronic Power Steering)

Steering Wheel Surges/Jerks While Turning (Electronic Power Steering)

Steering Wheel Kickback (Electronic Power Steering)

Steering Wheel Kickback (Electronic Power Steering)

Steering Effort Hard or Too Easy in One or Both Directions (Electronic Power Steering)

Steering Effort Hard or Too Easy in One or Both Directions (Electronic Power Steering)

Steering Effort Hard or Too Easy in One or Both Directions (Hydraulic Power Steering)

Steering Effort Hard or Too Easy in One or Both Directions (Hydraulic Power Steering)

Steering Linkage Inner Tie Rod Inspection

Special Tools

J-8001 Dial Indicator Set

For equivalent regional tools, refer to Special Tools .

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 the steering wheel 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/malibu/viii-2011-2014/remont/ignition-switchsteering-lock/#general-information__lifting-and-jacking-the-vehicle) .
4. If there is not a good location for the J-8001 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 J-8001 Dial Indicator pointer.
5. Install the J-8001 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 (2) and 9 o'clock (1) positions, gently push in on one side of the tire in order to remove any lash.
7. Zero the J-8001 Dial Indicator.
8. On the same side of the tire previously pushed in, gently pull out and measure the lash.
9. Record the measurement seen on the J-8001 Dial Indicator.
10. If the measured value exceeds 0.5 mm (0.02 in), replace the inner tie rod. Refer to «Steering Linkage Inner Tie Rod Replacement»(/chevrolet/malibu/viii-2011-2014/remont/manual-power-steering/#power-steering-system) .
11. Repeat the procedure for the other side.

Steering Linkage Outer Tie Rod Inspection

Special Tools

J-8001 Dial Indicator Set

For equivalent regional tools, refer to Special Tools .

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/malibu/viii-2011-2014/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/malibu/viii-2011-2014/remont/ignition-switchsteering-lock/#general-information__lifting-and-jacking-the-vehicle) .
3. Install the J-8001 Dial Indicator 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 J-8001 Dial Indicator position.
4. Grasping the tire at the 3 o'clock (2) and 9 o'clock (1) positions, gently push in on one side of the tire to remove any lash.
5. Zero the J-8001 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 J-8001 Dial Indicator.
8. If the measured value exceeds 0.5 mm (0.02 in) then replace the outer tie rod. Refer to «Steering Linkage Outer Tie Rod Replacement»(/chevrolet/malibu/viii-2011-2014/remont/manual-power-steering/#power-steering-system) .
9. Repeat the procedure for the other side.

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/malibu/viii-2011-2014/remont/ignition-switchsteering-lock/#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/malibu/viii-2011-2014/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 (USA and Canada)»(/chevrolet/malibu/viii-2011-2014/remont/lubrication-system/#maintenance-and-lubrication__fluid-and-lubricant-recommendations-usa-and) . 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/malibu/viii-2011-2014/remont/manual-power-steering/#power-steering-system) .

Note. Do not reuse any drained power steering fluid regardless of appearance or condition.

1. Raise the vehicle until the front wheels are off the ground. Refer to «Lifting and Jacking the Vehicle»(/chevrolet/malibu/viii-2011-2014/remont/ignition-switchsteering-lock/#general-information__lifting-and-jacking-the-vehicle) .
2. Place a large drain pan under the vehicle in order to collect the draining fluid.
3. Remove the fluid return hose at the power steering fluid reservoir or the pump inlet connection, as applicable.
4. Plug the reservoir return hose inlet connection on the power steering fluid reservoir or the pump, as applicable.
5. Have an assistant maintain the minimum fluid level in the reservoir using clean, new power steering fluid. Refer to «Checking and Adding Power Steering Fluid»(/chevrolet/malibu/viii-2011-2014/remont/manual-power-steering/#power-steering-system__checking-and-adding-power-steering-fluid) .
6. With the key in the ON position and with the engine OFF, turn the steering wheel fully to the left and to the right. Continue until the fluid from the return hose runs clear.
7. Remove the plug and install the fluid return hose to the power steering fluid reservoir or the pump inlet connection, as applicable.
8. Bleed the power steering system. Refer to «Power Steering System Bleeding»(/chevrolet/malibu/viii-2011-2014/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 3-9.
11. Remove the drain pan.
12. Lower the vehicle.

Scheme 7

Power Steering Fluid Reservoir Replacement

Scheme 8

Power Steering Pump Pulley Replacement (LY7)

Scheme 9

Power Steering Pump Replacement (LY7)

Disassembly Procedure

1. Remove the power steering pump flow control valve fitting (5) from the power steering pump housing (1).
2. Remove the power steering pump flow control valve fitting O-ring seal (4) from the power steering pump flow control valve fitting (5).
3. Remove the power steering pump flow control valve (3).
4. Remove the power steering pump flow control valve spring (2).

Assembly Procedure

1. Install the power steering pump flow control valve spring (2) into the power steering pump housing (1).
2. Install the power steering pump flow control valve (3) into the power steering pump housing (1).
3. Lubricate the power steering pump flow control valve fitting O-ring seal (4) with power steering fluid.
4. Install the power steering pump flow control valve fitting O-ring seal (4) onto the power steering pump flow control valve fitting (5).
5. Install the power steering pump flow control valve fitting (5) to the power steering pump housing (1). Tighten the fitting to 60 N.m (44 lb ft).

Removal Procedure

1. If necessary, remove the power steering pump. Refer to «Power Steering Pump Replacement (LY7)»(/chevrolet/malibu/viii-2011-2014/remont/manual-power-steering/#power-steering-system) .
2. Use a small chisel in order to remove the power steering pump shaft seal and discard it.

Installation Procedure

1. Lubricate the new power steering pump shaft seal using power steering fluid.
2. Use a deep socket to evenly press the power steering pump shaft seal into the power steering pump housing.
3. If necessary, install the power steering pump. Refer to «Power Steering Pump Replacement (LY7)»(/chevrolet/malibu/viii-2011-2014/remont/manual-power-steering/#power-steering-system) .

Scheme 10

Steering Linkage Outer Tie Rod Replacement

Tools Required

J 22610 Keystone Clamp Pliers

1. Remove the rack and pinion outer tie rod end. Refer to «Steering Linkage Outer Tie Rod Replacement»(/chevrolet/malibu/viii-2011-2014/remont/manual-power-steering/#power-steering-system) .
2. Remove the steering gear inner tie rod nut and discard it.
3. Remove the outer steering gear boot clamp.
4. Remove the inner steering gear boot clamp and discard it.
5. Disengage and remove the steering gear boot from the steering gear.
6. Inspect the sealing surfaces and threaded shaft portion of the steering gear and the steering gear inner tie rod. The surfaces must be clean and free of any debris.

1. Install a new clamp loosely on the inner part of the steering gear boot.
2. Apply grease from the service kit to the indicated locations.
3. Install the steering gear boot over the steering gear inner tie rod and onto the steering gear.
4. Using J 22610 keystone clamp pliers, crimp the inner steering gear boot clamp.
5. Install the outer steering gear boot clamp.
6. Install a new steering gear inner tie rod nut in the same position the prior one was removed from.
7. Install the rack and pinion outer tie rod end. Refer to «Steering Linkage Outer Tie Rod Replacement»(/chevrolet/malibu/viii-2011-2014/remont/manual-power-steering/#power-steering-system) .
8. Adjust the front toe. Refer to «Wheel Alignment - Steering Wheel Angle and/or Front Toe Adjustment»(/chevrolet/malibu/viii-2011-2014/remont/wheel-alignment/#wheel-alignment-system__wheel-alignment-steering-wheel-angle) .

1. Remove as much power steering fluid from the remote power steering fluid reservoir as possible.
2. Place drain pans under the vehicle as needed.
3. Compress the power steering reservoir inlet hose clamp (1) and disconnect the power steering reservoir inlet hose (2) from the remote power steering fluid reservoir (3).
4. Remove the right front tire and wheel assembly. Refer to «Tire and Wheel Removal and Installation»(/chevrolet/malibu/viii-2011-2014/remont/wheel-tire-system/#tires-and-wheels) .
5. Remove the power steering fluid reservoir inlet hose bracket nut.
6. Compress the power steering gear outlet hose clamp (1) and disconnect the power steering gear outlet hose (2) from the power steering reservoir inlet hose (3).
7. Remove the power steering reservoir inlet hose from the vehicle.

1. Position the power steering reservoir inlet hose to the vehicle. Compress the power steering gear outlet hose clamp (1) and connect the power steering gear outlet hose (2) to the power steering reservoir inlet hose (3).
2. Install the power steering fluid reservoir inlet hose bracket nut and tighten to 8 N.m (71 lb in).
3. Install the right front tire and wheel assembly. Refer to «Tire and Wheel Removal and Installation»(/chevrolet/malibu/viii-2011-2014/remont/wheel-tire-system/#tires-and-wheels) .
4. Compress the power steering fluid reservoir inlet hose clamp (1) and connect the power steering fluid reservoir inlet hose (2) to the remote power steering fluid reservoir (3).
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/malibu/viii-2011-2014/remont/manual-power-steering/#power-steering-system) .

1. Remove as much power steering fluid from the remote power steering fluid reservoir as possible.
2. Place drain pans under the vehicle as needed.
3. Compress the power steering fluid reservoir outlet hose clamp (1) and disconnect the power steering fluid reservoir outlet hose (2) from the remote power steering fluid reservoir (3).
4. Remove the right front tire and wheel assembly. Refer to «Tire and Wheel Removal and Installation»(/chevrolet/malibu/viii-2011-2014/remont/wheel-tire-system/#tires-and-wheels) .
5. Compress the power steering fluid reservoir outlet hose clamp (1) and disconnect the power steering fluid reservoir outlet hose (2) from the power steering pump (3).
6. Remove the power steering fluid reservoir outlet hose from the vehicle.

1. Position the power steering fluid reservoir outlet hose to the vehicle.
2. Compress the power steering fluid reservoir outlet hose clamp (1) and connect the power steering fluid reservoir outlet hose (2) to the power steering pump (3).
3. Install the right front tire and wheel assembly. Refer to «Tire and Wheel Removal and Installation»(/chevrolet/malibu/viii-2011-2014/remont/wheel-tire-system/#tires-and-wheels) .
4. Compress the power steering fluid reservoir outlet hose clamp (1) and connect the power steering fluid reservoir outlet hose (2) to the remote power steering fluid reservoir (3).
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/malibu/viii-2011-2014/remont/manual-power-steering/#power-steering-system) .

Special Tools

J 44586 Power Steering Gear Oil Seal Remover/Installer

1. Remove as much power steering fluid from the remote power steering fluid reservoir as possible.
2. Place drain pans under the vehicle as needed.
3. Remove the right front tire and wheel assembly. Refer to «Tire and Wheel Removal and Installation»(/chevrolet/malibu/viii-2011-2014/remont/wheel-tire-system/#tires-and-wheels) .
4. Disconnect the power steering gear inlet hose from the power steering pump.
5. Remove the steering gear. Refer to «Steering Gear Replacement (Electronic Power Steering)»(/chevrolet/malibu/viii-2011-2014/remont/manual-power-steering/#power-steering-system) , «Steering Gear Replacement (Hydraulic Power Steering LY7)»(/chevrolet/malibu/viii-2011-2014/remont/manual-power-steering/#power-steering-system) .
6. Remove the power steering gear inlet hose bolt at the steering gear.
7. Remove the power steering gear inlet hose from the vehicle.
8. Install J 44586 power steering gear oil seal remover/installer (2) to the steering gear oil seal (1).
9. Extract the steering gear oil seal (1) from the steering gear using J 44586 power steering gear oil seal remover/installer (2) with the aid of a flat-bladed tool (3) for additional leverage.

1. Install the NEW steering gear oil seal (1) to the steering gear using J 44586 power steering gear oil seal remover/installer (2).
2. Ensure the steering gear oil seals (1) are fully seated in the steering gear.
3. Position the power steering gear inlet hose in the vehicle.
4. Install the steering gear. Refer to «Steering Gear Replacement (Electronic Power Steering)»(/chevrolet/malibu/viii-2011-2014/remont/manual-power-steering/#power-steering-system) , «Steering Gear Replacement (Hydraulic Power Steering LY7)»(/chevrolet/malibu/viii-2011-2014/remont/manual-power-steering/#power-steering-system) .
5. Install the power steering gear inlet hose and bolt at the steering gear and tighten the bolt to 27 N.m (20 lb ft).
6. Connect the power steering gear inlet hose to the power steering pump and tighten the fitting to 27 N.m (20 lb ft).
7. Clean any excess power steering fluid from the vehicle and remove the drain pans.
8. Install the right front tire and wheel assembly. Refer to «Tire and Wheel Removal and Installation»(/chevrolet/malibu/viii-2011-2014/remont/wheel-tire-system/#tires-and-wheels) .
9. Fill and bleed the power steering system. Refer to «Power Steering System Bleeding»(/chevrolet/malibu/viii-2011-2014/remont/manual-power-steering/#power-steering-system) .

J 44586 Power Steering Gear Oil Seal Remover/Installer

1. Remove as much power steering fluid from the remote power steering fluid reservoir.
2. Place drain pans under the vehicle as needed.
3. Remove the front tire and wheel assemblies. Refer to «Tire and Wheel Removal and Installation»(/chevrolet/malibu/viii-2011-2014/remont/wheel-tire-system/#tires-and-wheels) .
4. Remove the steering gear. Refer to «Steering Gear Replacement (Electronic Power Steering)»(/chevrolet/malibu/viii-2011-2014/remont/manual-power-steering/#power-steering-system) , «Steering Gear Replacement (Hydraulic Power Steering LY7)»(/chevrolet/malibu/viii-2011-2014/remont/manual-power-steering/#power-steering-system) .
5. Remove the power steering gear inlet hose bolt and disconnect the power steering gear inlet hose and the power steering gear outlet hose from the steering gear.
6. Compress the power steering gear outlet hose clamp (1) and disconnect the power steering gear outlet hose (2) from the power steering reservoir inlet hose (3).
7. Remove the 2 power steering gear outlet pipe hose retainers from the right side of the front frame.
8. Remove the 2 power steering gear outlet hose retainers from the front of the front frame.
9. Remove the power steering gear outlet hose from the vehicle.
10. Extract the steering gear oil seals (1) from the steering gear using J 44586 remover/installer (2) with the aid of a flat-bladed tool (3) for additional leverage.

1. Install the NEW steering gear oil seals (1) to the steering gear using J 44586 remover/installer (2).
2. Ensure the steering gear oil seals (1) are fully seated in the steering gear.
3. Position the power steering gear outlet hose to the vehicle.
4. Install the steering gear. Refer to «Steering Gear Replacement (Electronic Power Steering)»(/chevrolet/malibu/viii-2011-2014/remont/manual-power-steering/#power-steering-system) , «Steering Gear Replacement (Hydraulic Power Steering LY7)»(/chevrolet/malibu/viii-2011-2014/remont/manual-power-steering/#power-steering-system) .
5. Connect the power steering gear inlet hose and the power steering gear outlet hose to the steering gear and install the power steering gear inlet hose bolt. Tighten Tighten the bolt to 27 N.m (20 lb ft)
6. Compress the power steering gear outlet hose clamp (1) and connect the power steering gear outlet hose (2) to the power steering reservoir inlet hose (3).
7. Install the 2 power steering gear outlet hose retainers to the front of the front frame.
8. Install the 2 power steering gear outlet pipe hose retainers to the right side of the front frame.
9. Clean any excess power steering fluid from the vehicle and remove the drain pans.
10. Install the front tire and wheel assemblies. Refer to «Tire and Wheel Removal and Installation»(/chevrolet/malibu/viii-2011-2014/remont/wheel-tire-system/#tires-and-wheels) .
11. Fill and bleed the power steering system. Refer to «Power Steering System Bleeding»(/chevrolet/malibu/viii-2011-2014/remont/manual-power-steering/#power-steering-system) .

1. Turn the front wheels to the straight forward position and secure the steering wheel from moving.
2. Disengage the rack and pinion outer tie rod ends from the steering knuckles. Refer to «Steering Linkage Outer Tie Rod Replacement»(/chevrolet/malibu/viii-2011-2014/remont/manual-power-steering/#power-steering-system) .
3. Separate the intermediate steering shaft from the steering gear. Refer to «Intermediate Steering Shaft Replacement»(/chevrolet/malibu/viii-2011-2014/remont/steering-column-switches/#steering-wheel-and-steering-column) .
4. Remove the transmission rear mount bolt.
5. Remove the steering gear bolts, nuts, and washers from the steering gear.
6. Remove the steering gear through the left front wheel opening.
7. Transfer any parts as needed.

1. Install the steering gear through the left front wheel opening.
2. Install the steering gear bolts, nuts, and washers to the steering gear. Tighten the bolts to 70 N.m (52 lb ft) plus an additional 90 degrees.
3. Install the transmission rear mount bolt and tighten to 90 N.m (66 lb ft).
4. Install the intermediate steering shaft to the steering gear. Refer to «Intermediate Steering Shaft Replacement»(/chevrolet/malibu/viii-2011-2014/remont/steering-column-switches/#steering-wheel-and-steering-column) .
5. Install the rack and pinion outer tie rod ends to the steering knuckles. Refer to «Steering Linkage Outer Tie Rod Replacement»(/chevrolet/malibu/viii-2011-2014/remont/manual-power-steering/#power-steering-system) .
6. Adjust the front toe. Refer to «Wheel Alignment - Steering Wheel Angle and/or Front Toe Adjustment»(/chevrolet/malibu/viii-2011-2014/remont/wheel-alignment/#wheel-alignment-system__wheel-alignment-steering-wheel-angle) .

1. Turn the front wheels to the straight forward position and secure the steering wheel from moving.
2. Remove as much power steering fluid from the remote power steering fluid reservoir as possible.
3. Place drain pans under the vehicle as needed.
4. Disengage the rack and pinion outer tie rod ends from the steering knuckles. Refer to «Steering Linkage Outer Tie Rod Replacement»(/chevrolet/malibu/viii-2011-2014/remont/manual-power-steering/#power-steering-system)
5. Separate the intermediate steering shaft from the steering gear. Refer to «Intermediate Steering Shaft Replacement»(/chevrolet/malibu/viii-2011-2014/remont/steering-column-switches/#steering-wheel-and-steering-column) .
6. Remove the steering gear heat shield from the steering gear.
7. Remove the transmission brace bolt.
8. Remove the transmission rear mount bolt and position the transmission brace aside.
9. Loosen the rear transmission mount bracket bolt.
10. Remove the 2 remaining transmission rear mount bolts.
11. Remove the 3 rear transmission mount bracket nuts and bolts (1).
12. Position the transmission rear mount and bracket aside.
13. Remove the power steering gear inlet hose bolt and disconnect the power steering gear inlet hose and the power steering gear outlet hose from the steering gear.
14. Remove the steering gear bolts, nuts, and washers from the steering gear.
15. Remove the steering gear through the left front wheel opening.
16. Transfer any parts as needed.

1. Install the steering gear through the left front wheel opening.
2. Install the steering gear bolts, nuts, and washers to the steering gear. Tighten the bolts and nuts to 110 N.m (81 lb ft).
3. Connect the power steering gear inlet hose and the power steering gear outlet hose to the steering gear and install the power steering gear inlet hose bolt and tighten to 27 N.m (20 lb ft).
4. Position the transmission rear mount and bracket in place.
5. Install the 3 rear transmission mount bracket bolts (1) and nuts and tighten to 50 N.m (37 lb ft).
6. Install the 2 remaining transmission rear mount bolts.
7. Place the transmission brace in the proper position. Install the bolt in order to secure the transmission brace to the transmission rear mount. Tighten the 3 transmission rear mount bolts to 50 N.m (37 lb ft).
8. Install the transmission brace bolt and tighten to 50 N.m (37 lb ft).
9. Tighten the rear transmission mount bracket bolt and tighten to 50 N.m (37 lb ft).
10. Install the steering gear heat shield to the steering gear.
11. Clean any excess power steering fluid from the vehicle and remove the drain pans.
12. Install the intermediate steering shaft to the steering gear. Refer to «Intermediate Steering Shaft Replacement»(/chevrolet/malibu/viii-2011-2014/remont/steering-column-switches/#steering-wheel-and-steering-column) .
13. Install the rack and pinion outer tie rod ends to the steering knuckles. Refer to «Steering Linkage Outer Tie Rod Replacement»(/chevrolet/malibu/viii-2011-2014/remont/manual-power-steering/#power-steering-system)
14. Fill and bleed the power steering system. Refer to «Power Steering System Bleeding»(/chevrolet/malibu/viii-2011-2014/remont/manual-power-steering/#power-steering-system) .
15. Adjust the front toe. Refer to «Wheel Alignment - Steering Wheel Angle and/or Front Toe Adjustment»(/chevrolet/malibu/viii-2011-2014/remont/wheel-alignment/#wheel-alignment-system__wheel-alignment-steering-wheel-angle) .

J 22610 Keystone Clamp Pliers

1. To remove the outer tie rod. Refer to «Steering Linkage Outer Tie Rod Replacement»(/chevrolet/malibu/viii-2011-2014/remont/manual-power-steering/#power-steering-system) .
2. Remove the hexagon jam nut (2) from the inner tie rod assembly (1).
3. Remove the tie rod end clamp (2) from the rack and pinion boot (1).
4. Remove the boot clamp (1) from the rack and pinion boot with side cutters.
5. Discard the boot clamp (1).
6. Remove the rack and pinion boot (1) and the breather tube, if present, from the rack and pinion gear assembly.

1. Install the new boot clamp (1) onto the rack and pinion boot (3).
2. Prior to rack and pinion boot installation, apply grease to the inner tie rod assembly (2) and the rack and pinion gear assembly (1).
3. Install the rack and pinion boot (3) onto the inner tie rod assembly (2).
4. If present, install the breather tube while aligning the breather tube with the mark made during removal and the molded nipple of the rack and pinion boot.
5. Install the rack and pinion boot onto the gear assembly (1) until the rack and pinion boot (3) is seated in the gear assembly groove.
6. Install the boot clamp (1) on the rack and pinion boot (2) with J 22610 keystone clamp pliers.
7. Crimp the boot clamp (1).
8. Pinch the pliers together on the rack and pinion boot (2) in order to install the tie rod end clamp.
9. Install the tie rod end clamp (2) onto the rack and pinion boot (1).
10. Install the hexagon jam nut (2) to the inner tie rod assembly (1).
11. To assemble the outer tie rod assembly. Refer to «Steering Linkage Outer Tie Rod Replacement»(/chevrolet/malibu/viii-2011-2014/remont/manual-power-steering/#power-steering-system) .

J-34028 Inner Tie Rod Wrench

1. Remove the steering gear from the vehicle. Refer to «Steering Gear Replacement (Electronic Power Steering)»(/chevrolet/malibu/viii-2011-2014/remont/manual-power-steering/#power-steering-system) , «Steering Gear Replacement (Hydraulic Power Steering LY7)»(/chevrolet/malibu/viii-2011-2014/remont/manual-power-steering/#power-steering-system) .
2. Remove the 2 steering gear boots. Refer to «Steering Gear Boot Replacement»(/chevrolet/malibu/viii-2011-2014/remont/manual-power-steering/#power-steering-system) .
3. Place the steering gear in a vise.
4. Slide the left shock dampener (4) from the left inner tie rod housing (6) to the rack (5).
5. Place a pipe wrench on the rack next to the left inner tie rod housing.
6. Place a wrench on the flats of the left inner tie rod housing.
7. Rotate the left inner tie rod housing counterclockwise, while holding the rack stationary, until the left inner tie rod separates from the rack.
8. Slide the right shock dampener (3) from the right inner tie rod housing (2) to the rack (5).
9. Place a pipe wrench on the left side of the rack.
10. Place a wrench on the flats of the right inner tie rod housing.
11. Rotate the right inner tie rod housing counterclockwise, while holding the rack stationary, until the right inner tie rod (1) separates from the rack.
12. If the steering gear has a female rack (1) and a male inner tie rod (3), remove the old LOCTITE® from the threads (2) on the inner tie rod and from the threads on the rack. If the steering gear has a male rack (5) and a female inner tie rod (4), LOCTITE® will not be present.

1. If the steering gear has a female rack (1) and a male inner tie rod (3), apply LOCTITE® 262, or equivalent, to the threads (2) on the left inner tie rod.
2. Install the left inner tie rod to the rack (3).
3. Place a pipe wrench on the rack next to the left inner tie rod housing (2).
4. Place a torque wrench and the J-34028 wrench on the flats of the left inner tie rod housing. Tighten the inner tie rod to 100 N.m (74 lb ft).
5. If the steering gear has a female rack (5) and a male inner tie rod (1), apply LOCTITE® 262, or equivalent, to the threads on the right inner tie rod.
6. Install the right inner tie rod to the rack.
7. Place a pipe wrench on the rack next to the left inner tie rod housing (4).
8. Place a torque wrench and the J-34028 wrench on the flats of the steering linkage inner tie rod housing (7). Tighten the inner tie rod to 100 N.m (74 lb ft).
9. Place each inner tie rod assembly (2) on a vise.
10. Stake both sides of the 2 female inner tie rod housings to the male rack.
11. Insert a 0.25 mm gauge (1) between the rack (2) and the inner tie rod housing in order to inspect the 4 stakes. The feeler gauge must not pass between the rack and the inner tie rod housing stake.
12. Slide the left shock dampener (2) over the left inner tie rod housing (3) until the front lip of the left shock dampener bottoms against the left inner tie rod housing.
13. Slide the right shock dampener over the right inner tie rod housing until the front lip of the right shock dampener bottoms against the right inner tie rod housing.
14. Install the 2 steering gear boots. Refer to «Steering Gear Boot Replacement»(/chevrolet/malibu/viii-2011-2014/remont/manual-power-steering/#power-steering-system) .
15. Install the steering gear to the vehicle. Refer to «Steering Gear Replacement (Electronic Power Steering)»(/chevrolet/malibu/viii-2011-2014/remont/manual-power-steering/#power-steering-system) , «Steering Gear Replacement (Hydraulic Power Steering LY7)»(/chevrolet/malibu/viii-2011-2014/remont/manual-power-steering/#power-steering-system) .

1. Hoist the vehicle. Refer to «Lifting and Jacking the Vehicle»(/chevrolet/malibu/viii-2011-2014/remont/ignition-switchsteering-lock/#general-information__lifting-and-jacking-the-vehicle) .
2. Place drain pans under the vehicle as needed.
3. Remove the steering gear cylinder pipe retaining plate bolt (1) and retaining plate (2).
4. Loosen the steering gear cylinder pipe fittings (3, 4).
5. Remove both steering gear cylinder pipes from the steering gear (1).
6. Remove and discard the steering gear cylinder pipe seals (4) from the steering gear at the valve end (5).

1. Inspect the steering gear cylinder pipes (1) for the following items: Cracks Dents Damage to the threads
2. Replace the steering gear cylinder pipes (1) as needed.
3. Lubricate and install the steering gear cylinder pipe seals (2) onto the steering gear cylinder pipes (1).
4. Place the steering gear cylinder pipe (2) into the steering gear at the valve end of the steering gear (3).
5. Start the steering gear cylinder pipe fitting (1) in the steering gear (4) but do not torque it.
6. Place the longer steering gear cylinder pipe (2) into the steering gear at the valve end of the steering gear (3).
7. Start the steering gear cylinder pipe fitting (1) in the steering gear (4) but do not torque it.
8. Install the steering gear cylinder pipe retaining plate (2) and bolt (1) and tighten to 12 N.m (106 lb in).
9. Tighten the steering gear cylinder pipe fittings (3) to 19 N.m (14 lb ft).
10. Clean any excess power steering fluid from the vehicle and remove the drain pans.
11. Fill and bleed the power steering system. Refer to «Power Steering System Bleeding»(/chevrolet/malibu/viii-2011-2014/remont/manual-power-steering/#power-steering-system) .

1. Disconnect the power steering assist motor sensor wire harness connector (6) from the power steering assist motor (5).
2. Use needle nose pliers in order to remove the power steering assist motor wire strap clip from the power steering assist motor. If you are replacing the power steering assist motor, remove the power steering assist motor wire strap clip from the power steering assist motor sensor wire harness. If you are replacing the steering column, keep the power steering assist motor wire harness strap clip attached to the power steering assist motor sensor wire harness.
3. Use a M6x1 TORX® head bit in order to remove the 2 power steering assist motor bolts (2).
4. Grasp the power steering assist motor. Pull on the power steering assist motor evenly and straight away from the steering column in order to remove the power steering assist motor.
5. Inspect the steering column assist mechanism input shaft for the rotor isolator bumper (4). If present, remove the rotor isolator bumper.

1. Insert the rotor isolator bumper (1) into the rotor isolator (3) in the power steering assist motor (2).
2. Fit the rotor isolator over the steering column assist mechanism input shaft.
3. Use a M6x1 TORX® head bit in order to install the power steering assist motor bolts (1) and tighten to 9 N.m (80 lb in).
4. Connect the power steering assist motor sensor wire harness (3) to the power steering assist motor (2).
5. Install the power steering assist motor sensor wire harness strap clip (4) to the power steering assist motor.
6. Perform the control module setup. Refer to «Control Module References»(/chevrolet/malibu/viii-2011-2014/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) .

The power steering system reduces the amount of effort needed to steer the vehicle. The system uses the powertrain control module (PCM), body control module (BCM), power steering control module (PSCM), discrete battery voltage supply circuit, steering shaft torque sensor, steering wheel position sensor, power steering motor, driver information center (DIC), and the serial data circuit to perform the system functions. The PSCM and the power steering motor are serviced as an assembly and are serviced separately from the steering column assembly. The steering shaft torque sensor and the steering wheel position sensor are not serviced separately from each other or from the steering column assembly. The steering column assembly does not include the power steering motor and module assembly.

Steering Shaft Torque Sensor

The power steering control module (PSCM) uses the steering shaft torque sensor as it's main input for determining steering direction and the amount of assists needed. 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 section of torsion bar, where the torque sensor is located. The sensor is a 5-volt dual analog inverse signal device with a valid signal voltage range of 0.25-4.75 volts. When applying torque to the steering column shaft during a right turn, the sensor's signal 1 voltage increases, while the signal 2 voltage decreases within the valid signal voltage range. When applying torque to the steering column shaft during a left turn, the signal 1 voltage decreases, wile the signal 2 voltage increases within the valid signal voltage range. The PSCM recognizes this change in signal voltage as steering direction and steering column shaft torque.

Steering Wheel Position Sensor

The power steering control module (PSCM) uses the steering position sensor to determine the steering system on center position. Since the power steering motor provides a slight amount of return to center assist, the PSCM will command the power steering motor to the steering system center position and not beyond. The sensor is a 5-volt dual analog triangle signal device with a valid signal voltage range of 0-5 volts. The sensors signal 1 and signal 2 voltage values will increase and decrease within the valid voltage range, and stay within 2.5-2.8 volts of each other as the steering wheel is turned.

Power Steering Motor

The power steering motor is a 12-volt brushless DC reversible motor with a 65-amp rating. The motor assists steering through a worm gear and reduction gear located in the steering column housing.

Power Steering Control Module (PSCM)

The power steering control module (PSCM) uses a combination of steering shaft torque sensor input, vehicle speed, calculated system temperature and steering tuning to determine the amount of steering assist. When the steering wheel is turned, the PSCM uses signal voltage from the steering shaft torque sensor to detect the amount of torque and steering direction being applied to the steering column shaft and then command the proper amount of current to the power steering motor. The PSCM receives a vehicle speed message from the powertrain control module (PCM) via the serial data circuit. 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 power steering motor are designed to handle 65 amps continuously. If the power steering system is exposed to excessive amounts of static steering conditions, the PSCM will go into a protection mode to avoid thermal damage to the power steering components. In this mode the PSCM will limit the amount of current commanded to the power steering motor which reduces system temperature and steering assist levels. The PSCM must also be setup with the correct steering tuning which are different in relation to the vehicles powertrain configuration, sedan, coupe, tire and wheel size etc. The PSCM has the ability to detect malfunctions within the power steering system. Any malfunction detected will cause the driver information center (DIC) to display the POWER STEERING warning message and/or the service vehicle soon indicator.

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 one 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.

Illustration Tool Number/Description EL-47564 Power Steering Control Module (PSCM) Test Harness Brazil - Use local equivalent J-22610 Keystone Clamp Pliers Brazil - Use local equivalent J-24319-B Steering Linkage and Tie Rod Puller J-25033-C Pulley Installer Brazil - Use local equivalent J-25034-C Pulley Remover Brazil - Use local equivalent J-34028 Inner Tie Rod Wrench J-39570 Chassis Ear J-44586 Power Steering Gear Oil Seal Remover/Installer Brazil - Use local equivalent J-44721 Power Steering Analyzer

Scheme 11

Scheme 12

Scheme 13

Scheme 14

Scheme 15

See also:
• Diagnostic System Check - Vehicle
• Strategy Based Diagnosis
• Diagnostic Procedure Instructions
• COMPONENT CONNECTOR END VIEWS - INDEX
• Circuit Testing
• Connector Repairs
• Testing for Intermittent Conditions and Poor Connections
• Wiring Repairs
• Control Module References
• Diagnostic Trouble Code (DTC) List - Vehicle
• Diagnostic Repair Verification
• Steering Column Replacement (Electronic Power Steering)
• Steering Wheel in the Full Turn Position Caution
• Fastener Caution
• Lifting and Jacking the Vehicle
• Noise in Steering Column
• Drive Belt Falls Off and Excessive Wear Diagnosis
• Drive Belt Falls Off and Excessive Wear Diagnosis
• Drive Belt Replacement (LE5)
• Drive Belt Replacement
• Noise Diagnosis - Front Suspension
• Vehicle Certification, Tire Placard, Anti-Theft, and Service Parts ID Label
• Tire and Wheel Removal and Installation
• Wheel Alignment Measurement
• Fluid and Lubricant Recommendations (USA and Canada)
• Wheel Alignment - Steering Wheel Angle and/or Front Toe Adjustment
• DTC C0000
• Increase in Effort While Turning Steering Wheel
• Poor Return of Steering Wheel
• Steering Wheel Surges/Jerks While Turning (Electronic Power Steering)
• Steering Wheel Kickback (Electronic Power Steering)
• Power Steering Fluid Leaks
• Checking and Adding Power Steering Fluid
• Steering Effort Hard or Too Easy in One or Both Directions (Hydraulic Power Steering)
• Power Steering Pump Specifications
• Fastener Tightening Specifications
• Steering Linkage Inner Tie Rod Inspection
• Steering Linkage Outer Tie Rod Inspection