Diagnostic Starting Point - Automatic Transmission

Diagnostic Starting Point - Automatic Transmission
Begin the system diagnosis with Diagnostic System Check - Vehicle in Vehicle DTC Information. The Diagnostic System Check provides the following information: Diagnostic System Check - Vehicle
^ The identification of the control module which commands the system
^ The ability of the control module to communicate through the serial data circuit
^ The identification and status of stored diagnostic trouble codes (DTCs)

The use of Diagnostic System Check - Vehicle in Vehicle DTC Information, identifies the correct procedure for diagnosing the system and where the procedure is located.


Symptoms
When it has been determined through Diagnostic System Check - Vehicle in Vehicle DTC Information, that no DTCs are present. If it is determined that a malfunction exists, identify the concern by referring to the Symptoms - Automatic Transmission table. The Symptoms - Automatic Transmission table provides common diagnostic categories which relate directly to diagnostic information or procedures.