Pinpoint Test H: Transaxle Fluid Pressure Switch

WARNING: This page is about a different car, the 2006 Mercury Milan and 2006 Ford Fusion. However, it is still accessible from the selected car via links, so may be relevant.

H1 CHECK HARNESS FOR A SHORT TO GROUND
- Key in OFF position.
- Disconnect: TCM Connector C2352b.
- Disconnect: Transmission Fluid Pressure Switch C1536.
- Measure the resistance between transmission fluid pressure switch C1536 and ground.
  
  Fig 1: Checking Harness For Short To Ground
  Courtesy of FORD MOTOR CO.
- Is the resistance greater than 10,000 ohms?
Yes : GO to H2.

No : REPAIR the circuit. TEST the system for normal operation.
H2 CHECK HARNESS FOR AN OPEN
- Measure the resistance between transmission fluid pressure switch C1536 and TCM C2352b-20.
  
  Fig 2: Checking Harness For Open
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?
Yes : GO to H3.

No : REPAIR the circuit. TEST the system for normal operation.
H3 CHECK HARNESS FOR A SHORT TO GROUND
- Connect: TCM Connector C2352b.
- Key in START position.
- Measure the resistance between transmission fluid pressure switch and ground.
  
  Fig 3: Checking Harness For Short To Ground
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?
Yes : INSTALL a new TCM. TEST the system for normal operation.

No : INSTALL a new transmission fluid pressure switch TEST the system for normal operation.