Pinpoint Test B: TCS/O/D Cancel Switch Does Not Operate Correctly

B1 TEST THE IC
- Connect the scan tool.
- Using the scan tool, monitor the transmission control switch (TCS) PID while cycling the Transmission Control Switch (TCS)/Overdrive (O/D) switch.
- Does the TCS PID cycle from depressed to not depressed?
- Yes: REFER to INSTRUMENTATION, MESSAGE CENTER, AND WARNING CHIMES .
- No: GO to B2 .
B2 CHECK SJB FUSE 71 (10A)
- Ignition OFF.
- Check fuse: Smart Junction Box (SJB) 71 (10A).
- Is the resistance less than 5 ohms?
- Yes: GO to B3 .
- No: GO to B4.
B3 TEST THE TCS /O/D SWITCH POWER CIRCUIT FOR AN OPEN
- Disconnect: Selector Lever Harness C3245.
- Disconnect: SJB Fuse 71 (10A).
- Measure the resistance between selector lever harness C3245-6, circuit CBP30 (YE/BU) and the output side of SJB fuse 71 (10A).
  
  Fig 1: Checking Circuit CBP30 For An Open
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?
- Yes: GO to B5.
- No: REPAIR circuit CBP30 (YE/BU) for an open. RECONNECT all components. TEST the system for normal operation.
B4 TEST THE TCS /O/D SWITCH POWER CIRCUIT FOR A SHORT TO GROUND
- Disconnect: Selector Lever Harness C3245.
- Disconnect: SJB Fuse 71 (10A).
- Measure the resistance between selector lever harness C3245-6, circuit CBP30 (YE/BU) and ground.
  
  Fig 2: Checking Circuit CBP30 For Short To Ground
  Courtesy of FORD MOTOR CO.
- Is the resistance greater than 10,000 ohms?
- Yes: GO to B6.
- No: REPAIR circuit CBP30 (YE/BU) for a short to ground.
  RECONNECT all components. TEST the system for normal operation.
B5 TEST THE TCS /O/D SWITCH SIGNAL CIRCUIT FOR AN OPEN
- Disconnect: PCM C175B.
- Measure the resistance between selector lever harness C3245-5, circuit CET34 (BN/GN) and PCM C175B-16, circuit CET34 (BN/GN).
  
  Fig 3: Checking Circuit CET34 For An Open
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?
- Yes: GO to B7.
- No: REPAIR circuit CET34 (BN/GN) for an open. RECONNECT all components. TEST the system for normal operation.
B6 TEST THE TCS /O/D SWITCH SIGNAL CIRCUIT FOR A SHORT TO GROUND
- Measure the resistance between selector lever harness C3245-5, circuit CET34 (BN/GN) and ground.
  
  Fig 4: Checking Circuit CET34 For Short To Ground
  Courtesy of FORD MOTOR CO.
- Is the resistance greater than 10,000 ohms?
- Yes: GO to B7 .
- No: REPAIR circuit CET34 (BN/GN) for a short to ground. TEST the system for normal operation.
B7 TEST THE TCS /O/D SWITCH
- Measure the resistance between selector lever C3245-5 and C3245-6 component side, while cycling the TCS /O/D switch.
  
  Fig 5: Measuring Resistance Between Selector Lever C3245-5 And C3245-6 Component Side
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms when pressed and greater than 10,000 ohms when released?
- Yes: INSTALL a new PCM. REFER to ELECTRONIC ENGINE CONTROLS . TEST the system for normal operation.
- No: INSPECT the selector lever wiring harness for damage and repair as necessary. If the selector lever wiring harness is not damaged, INSTALL a new selector lever knob. REFER to SELECTOR LEVER KNOB . TEST the system for normal operation.