Diagnostic System Check

Diagnostic Starting Point - Automatic Transmission

Begin the system diagnosis with Diagnostic System Check - Engine Controls. The Diagnostic System Check provides the following information:
^ The identification of the control module(s) which commands the system.
^ The ability of the control module(s) to communicate through the serial data circuit.
^ The identification and status of stored Diagnostic Trouble Codes (DTCs).

The use of Diagnostic System Check - Engine Controls identifies the correct procedure for diagnosing the system and where the procedure is located.