Saturn Saturn ASTRA Specifications download pdf (Page 13)

Chassis Specialist : Electric Power Steering

Page 10

Malibu Steering Column Assembly

EPAS Column Assembly Initialization

1. Have the vehicle on a flat level surface with the transmission in PARK

2. Place the steering wheel in the straight ahead position

3. Connect the scan tool to the diagnostic link connector (DLC)

4. Turn the ignition to RUN

5. Select ESP sensor calibration on the scan tool menu and follow the on screen instructions

6. Clear all power steering system trouble codes from all modules

7. Turn the ignition to the OFF position and wait at least 25 seconds before performing any other

repairs that may require the battery to be disconnected or the EPAS module be disconnected.

8. Road test the vehicle to verify repairs

GENERAL MOTORS ELECTRIC POWER STEERING (EPS)

General Motors uses three

different EPS systems. One is

manufactured by Delphi and is

used on the Chevrolet Malibu,

and the Pontiac G6. The second

system is manufactured by Koyo

and is used on the Chevrolet

Cobalt, HHR and Equinox, the

Pontiac Torrent and G5 (Pursuit)

and the Saturn Ion and the Vue.

The third system is used on the

2009 Saturn Astra and is an

electro-hydraulic system.

In 2004 General Motors

introduced the Delphi EPS

system on the Chevrolet Malibu.

This system consists of a 65 amp brushless DC electric motor with an integral PSCM mounted to the

steering column. The system uses both a torque sensor and a steering wheel position sensor to monitor

the steering input.

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Saturn Saturn ASTRA Specifications Page 13