Diagnostic Check

This test determines if the Transmission itself or its inputs or outputs connections or sensors are failing.

If you do not have a "Scan Tool" (TECH 1), use the "CHECK TRANS" Indicator Codes; See Reading Codes Without Scan Tool. Displaying and Reading Trouble Codes

If you do have a "Scan Tool" (TECH 1);

1. Connect the TECH 1.
2. Turn on the Ignition but not the Engine.
3. Push "F2" on TECH 1 to see the Diagnostic Trouble Code (DTC).
4. If you have a DTC, write down all the code numbers and check the appropriate Trouble Code Chart.
5. If you do not have a DTC:
a. Do the "CHECK TRANS" Check. Testing and Inspection




b. If it is flashing and the flash is 0.2 seconds "ON" and 0.2 seconds "OFF", this means that you should have a DTC stored. Recheck and if you find the same problem, refer to TCM MEM-CAL Replacement. Service and Repair

3. IF the "CHECK TRANS" indicator is not flashing, refer to Without DTC Set. Testing and Inspection