Look on page AT-25 of the first document for a diagnostic flow chart to diagnose a no overdrive condition and the second document (AT-19)contains the instructions to do the the manual shift test that you are told to do in the first document.
Click Here Diagnostic flow chart
Click Here Manual Shift Test
What it says is to cancel the diagnostic "code." If you don't have a check engine light or a flashing overdrive light then you don't have a code. If it went into overdrive witht he manual test, then you have either a bad overdrive shift solenoid, if it does not go into overdrive witht he manul test, repair or replace your transmission because the failure is internal.