Diagnostic Starting Point - Automatic Transmission

Diagnostic Starting Point - Automatic Transmission

Begin the system diagnosis withDiagnostic System Check - Vehicle (Initial Inspection and Diagnostic Overview) . The Diagnostic System Check provides the following information:

* The identification of the control module or modules which commands the system
* The ability of the control module or modules to communicate through the serial data circuit
* The identification and status of stored DTCs


The use of theDiagnostic System Check - Vehicle (Initial Inspection and Diagnostic Overview) identifies the correct procedure for diagnosing the system and the procedure location.

Symptoms

When it has been determined throughDiagnostic System Check - Vehicle (Initial Inspection and Diagnostic Overview) that no DTCs are present, begin symptom diagnosis by reviewing theTransmission Component and System Description (Transmission Component and System Description) . Reviewing theTransmission Component and System Description (Transmission Component and System Description) information enables you to understand the operation of the system. This helps you determine if the condition described by the customer is normal or if a malfunction exists. If it is determined that a malfunction exists, identify the concern by referring to the tableSymptoms - Automatic Transmission (- Symptoms - Automatic Transmission) . The tableSymptoms - Automatic Transmission (- Symptoms - Automatic Transmission) provides common diagnostic categories which relate directly to diagnostic information or procedures.