Diagnostic Starting Point - Power Steering System w/o Electro-Hydraulic Steering
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.
Diagnostic Starting Point - Power Steering System w/Electro-Hydraulic Steering
Begin the system diagnosis with the Diagnostic System Check - Vehicle . You may want to review the Power Steering System Description and Operation before beginning the diagnosis. The diagnostic system check will provide the following information:
| • | The identification of the control modules which command the system |
| • | The ability of the control modules to communicate through the GM LAN circuits |
| • | The ability of the control module to communicate through the serial data circuit |
| • | The identification of any stored diagnostic trouble codes (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.
