Gear Ratio Functional Check
The TCM monitors the speed sensors that are located at input and output gear positions, internal to the transmission. These ratios describe the gear selected. A Comparison of these speed sensors against the gear selected indicates a fault is present.
If the table does not include details of the following enabling conditions: intake air and engine coolant temperature, vehicle speed range, and time after engine start-up then the state of these parameters has no influence upon the execution of the monitor. See Fig 1 .