Test Description

WARNING: This page is about a different car, the 2003 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.

The numbers below refer to the step numbers on the diagnostic table.

1: Do not perform the Diagnostic System Check - Automatic Transmission unless one of the concerns listed is present. Failure to follow this procedure could lead to misdiagnosis of the system.
2: Capturing the stored ECM information will preserve the data that will be lost upon instruction to clear the DTCs at the end of a diagnostic table, or if a TCM disconnect or replacement occurs during a diagnostic procedure. Write down any non emissions DTCs that are set at this time. Review the captured information at the end of the diagnostic table in order to catch the next DTC in the event that the multiple DTCs were stored. Follow the order of priority as listed below.
4: Check for applicable service bulletins before proceeding with the diagnosis.
5: If multiple DTCs are stored, diagnose the DTCs in the following order of priority:
1. The System Voltage DTCs
2. Component level DTCs
  Diagnose the multiple DTCs within this category in numerical order starting with the lowest DTC number.
3. The System level DTCs
4. The Transmission DTCs
  When there is a known exception, a DTC table may direct the technician to diagnose a different DTC first.
6: Compare the actual control system data with the values in the Transmission Scan Tool Data List in order to determine if any parameter is not within limits. A base engine condition, such as advanced cam timing, may substantially alter the sensor values. If the actual data does not correspond with the values in the Transmission Scan Tool Data List, but the corresponding DTC is not set, this indicates that you have to meet specific conditions before some diagnostics will run. This information is in the supporting text for the DTC table. If you suspect a system fault, such as Shift Solenoid operation, TCC operation, refer to the DTCs that apply to that system. The DTC tables are not, by design, for use unless a DTC is set; however, many tables begin with a functional test of the related component. This information can be a useful aid in diagnosis.

Diagnostic System Check - Automatic Transmission

Step	Action	Value	Yes	No
1	Inspect for one or more of the following conditions: The malfunction indicator lamp (MIL) illuminates with the engine running. A Service Vehicle Soon (SVS) lamp illuminates with the engine running. There is a customer concern of powertrain performance/driveability. There is a suspected fault in a powertrain controlled component or system. Is one or more of the conditions present?	-	Go to Step 2	System OK
2	Did you perform the Diagnostic System Check - Engine Controls?	-	Go to Step 3	Go to DIAGNOSTIC SYSTEM CHECK -- ENGINE CONTROLS
3	With the scan tool, select transmission data. Does the scan tool display transmission data?	-	Go to Step 4	Go to Scan Tool Does Not Communicate with Class 2 Device in Data Link Communications
4	Inspect for applicable Service Bulletins which may address the concerns. Perform repair procedures as necessary. Did a Service Bulletin procedure correct the condition?	-	System OK	Go to Step 5
5	With the scan tool, inspect for DTCs in the TCM. Are there any DTCs present?	-	Go to Diagnostic Trouble Code (DTC) List/Type	Go to Step 6
6	With the scan tool, compare the transmission data with the values shown in the Transmission Scan Tool Data List. Refer to Scan Tool Data List . Are the displayed values normal or within typical ranges?	-	Go to Symptoms - Automatic Transmission	Go to Transmission Component and System Description