Harsh Garage Shift or Engine Hesitation On Acceleration

Harsh Garage Shift or Engine Hesitation on Acceleration:

Circuit Description
The automatic transmission fluid pressure (TFP) manual valve position switch consists of two normally-open pressure switches. The assembly is attached to the lower control valve body.
The PCM supplies ignition voltage on the two range signal circuits, signal circuit A and signal circuit C. By grounding one of the switches with fluid pressure from the manual valve, the PCM detects a garage shift from PARK/NEUTRAL to REVERSE or DRIVE, D1, D2, D3, or D4. Refer to the Transmission Fluid Pressure (TFP) Manual Valve Position Switch Logic. This information is used by the PCM in order to adjust line pressure during garage shifts.
If one of the following conditions occur, garage shifts may become harsh:
^ An open signal circuit
^ A signal circuit shorted to ground
^ A damaged or leaking pressure switch seal
^ Sediment or debris in a pressure switch
^ Damaged or stuck pressure switch contacts








Test Description
The numbers below refer to the step numbers on the diagnostic table.
2. This step tests the indicated range signal to the manual valve range actually selected.
4. This step tests for correct voltage from the PCM.