Always begin the diagnosis by reviewing the system Description and Operation. Reviewing the Description and Operation will help you determine the correct symptom diagnostic procedure for when a malfunction exists. Reviewing the Description and Operation will also help you determine if the condition described by the customer is normal operation.
For power seats without memory (A45), refer to Symptoms - Seats in order to identify the correct procedure for diagnosing the system and where the procedure is located.
For seats with memory (A45) and heated seats, begin diagnosis with the Diagnostic System Check - Vehicle in Vehicle DTC Information. 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 serial data circuit |
| • | 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.
