Check Trans Indicator
Find "CHECK TRANS" indicator and verify if it is:
A. Flashing. Displaying and Reading Trouble Codes
B. Staying "ON". Do the "Check Trans Check".
C. Is never "ON" when the Ignition key is turned "ON". Do the "Check Trans Check".
D. Is "ON" during 2 to 3 seconds at ignition but "OFF" after normal operation. No Diagnostic Trouble Code (DTC) or malfunction.