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For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2009 🢒 Equinox 🢒 Steering 🢒 Power Steering 🢒 Diagnostic Starting Point - Power Steering System

Diagnostic Starting Point - Power Steering System with EPS

System Familiarization

Review the electric power steering (EPS) system operation in order to familiarize yourself with the correct system functions and operations. Refer to Power Steering System Description and Operation .

Visual/Physical Inspection
    • Faulty electrical connections or wiring may be the cause of intermittent conditions. Refer to Testing for Intermittent Conditions and Poor Connections .
    • Inspect for aftermarket components such as tires, or wheels which could affect the operation and/or performance of the power steering system.
    • Inspect the steering column for accident damage. Refer to Steering Column Accident Damage Inspection .

System Diagnosis

After incorrect system operation has been verified and that aftermarket devices, or intermittent conditions are not the cause, begin the system diagnosis with the Vehicle Diagnostic System Check. The Vehicle Diagnostic System Check will provide the following information:

  1. The identification of the control modules that control the Power Steering System.
  2. The ability of those control modules to communicate via the serial data circuit.
  3. The presence of any stored diagnostic trouble codes (DTCs) in those control modules and there status.

The use of the Vehicle Diagnostic System Check will identify the correct procedure for diagnosing the malfunction and where the procedure is located. Refer to Diagnostic System Check - Vehicle .

Diagnostic Starting Point - Power Steering System with HPS

Begin the system diagnosis by reviewing the system Description and Operation. Refer to Power Steering System Description and Operation . 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.