Fluid Pressure Sensor/Switch: Service and Repair

Transmission Fluid Pressure Manual Valve Position Switch Replacement

Removal Procedure





1. Remove the transaxle case side cover. Refer to Control Valve Body Cover Replacement (Control Valve Body Cover Replacement).
2. Remove the TFP switch assembly bolts.
3. Remove the TFP switch assembly from the control valve body assembly. The TFP switch O-rings are reusable if not damaged and should remain with the switch assembly.



Installation Procedure





1. Inspect the TFP switch assembly in order to verify the condition and correct location of the pressure switch O-rings. If necessary, replace the O-rings.

Notice: Refer to Fastener Notice (Fastener Notice).

2. Install the TFP switch assembly onto the control valve body assembly and install the bolts.

Tighten the control valve body bolts to 12 N.m (9 lb ft).

3. Install the transaxle case side cover. Refer to Control Valve Body Cover Replacement (Control Valve Body Cover Replacement).
4. Start the engine, warm up the transaxle, and check for leaks.
5. Inspect for proper fluid level. Refer to Transmission Fluid Check (4T45-E Automatic Transaxle).

Important: It is recommended that transmission adaptive pressure (TAP) information be reset.


Resetting the TAP values using a scan tool will erase all learned values in all cells. As a result, The ECM, PCM or TCM will need to relearn TAP values. Transmission performance may be affected as new TAP values are learned.


6. Reset the TAP values. Refer to Transmission Adaptive Functions (Transmission Adaptive Functions).