Transmission Fluid Pressure (TFP) Switch Test Procedure
WARNING: This page is about a different car, the 2008 GMC Yukon and 2008 Chevrolet Tahoe. However, it is still accessible from the selected car via links, so may be relevant.
| Callout | Component Name |
|---|---|
| 1 | Pressure Control (PC) Solenoid 2 |
| 2 | Pressure Control (PC) Solenoid 4 |
| 3 | Shift Solenoid (SS) 2 |
| 4 | 16 Pin Connector |
| 5 | Line Pressure Control (PC) Solenoid |
| 6 | Transmission Fluid Pressure (TFP) Switch 5 |
| 7 | Pressure Control (PC) Solenoid 6 - Not Used |
| 8 | Pressure Control (PC) Solenoid 3 |
| 9 | Transmission Fluid Pressure (TFP) Switch 3 |
| 10 | Transmission Fluid Pressure (TFP) Switch 1 |
| 11 | Transmission Fluid Pressure (TFP) Switch 4 |
| 12 | Pressure Control (PC) Solenoid 5 |
| 13 | Shift Solenoid (SS) 1 |
- Remove the DT-47825 from the control solenoid (w/body and TCM) valve assembly.
- With the ignition ON and the scan tool communicating with the vehicle, using a soft blunt object, depress each transmission fluid pressure (TFP) switch port. The corresponding TFP Switch parameter on the scan tool display should display HI when depressed and Low when released.
- If the control solenoid (w/body and TCM) valve assembly fails any of the above tests, replace the control solenoid (w/body and TCM) valve assembly.
- If the control solenoid (w/body and TCM) valve assembly passes the above tests, the concern is internal to the transmission.