Pinpoint Test D: TCS Switch Does Not Operate Correctly

D1 CHECK THE IC
- Connect the scan tool.
- Using the scan tool, monitor the TCS PID while cycling the Transmission Control Switch (TCS).
- Does the TCS PID cycle from depressed to not depressed?
  - Yes : REFER to INSTRUMENTATION, MESSAGE CENTER, AND WARNING CHIMES .
  - No : GO to D2.
D2 CHECK BCM FUSE 42 (5A)
- Ignition OFF.
- Check fuse: Body Control Module (BCM) 42 (5A).
- Is the resistance less than 5 ohms?
  - Yes : GO to D3.
  - No : GO to D4.
D3 CHECK THE TCS POWER CIRCUIT FOR AN OPEN
- Disconnect: Floor Shifter Harness C3245.
- Disconnect: BCM Fuse 42 (5A).
- Measure the resistance between floor shifter harness C3245-6, circuit CBP42 (GN) and the output side of BCM fuse 42 (5A).
- Is the resistance less than 5 ohms?
  - Yes : GO to D4.
  - No : REPAIR circuit CBP42 (GN) for an open. CLEAR the DTCs. TEST the system for normal operation.
D4 CHECK THE TCS POWER CIRCUIT FOR A SHORT TO GROUND
- Disconnect: C3245.
- Disconnect: BCM Fuse 42 (5A).
- Measure the resistance between floor shifter harness C3245-6, circuit CBP42 (GN) and ground.
  
  Fig 1: Measuring Resistance Between Floor Shifter Harness C3245-6, Circuit CBP42 (GN) And Ground
  Courtesy of FORD MOTOR CO.
- Is the resistance greater than 10, 000 ohms?
  - Yes : GO to D5.
  - No : REPAIR circuit CBP42 (GN) for a short to ground. CLEAR the DTCs. TEST the system for normal operation.
D5 CHECK THE TCS SIGNAL CIRCUIT FOR AN OPEN
- Disconnect: PCM C175T.
- Measure the resistance between floor shifter harness C3245-5, circuit CET34 (BN/GN) and PCM C175T-31.
  
  Fig 2: Measuring Resistance Between Floor Shifter Harness C3245-5, Circuit CET34 (BN/GN) And PCM C175T-31
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?
  - Yes : GO to D6.
  - No : REPAIR circuit CET34 (BN/GN) for an open. CLEAR the DTCs. TEST the system for normal operation.
D6 CHECK THE TCS SIGNAL CIRCUIT FOR A SHORT TO GROUND
- Measure the resistance between floor shifter harness C3245-5, circuit CET34 (BN/GN) and ground.
  
  Fig 3: Measuring Resistance Between Floor Shifter Harness C3245-5, Circuit CET34 (BN/GN) And Ground
  Courtesy of FORD MOTOR CO.
- Is the resistance greater than 10, 000 ohms?
  - Yes : GO to D7.
  - No : REPAIR circuit CET34 (BN/GN) for a short to ground. CLEAR the DTCs. TEST the system for normal operation.
D7 CHECK THE TCS
- Measure the resistance between floor shifter harness C3245-5 and C3245-6 component side, while cycling the TCS.
  
  Fig 4: Measuring Resistance Between Floor Shifter Harness 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 : REPLACE the PCM. PROGRAM the PCM with the latest calibration level. PERFORM the solenoid body strategy data download procedure, REFER to Solenoid Body Strategy in AUTOMATIC TRANSMISSION - 6F50/6F55 or AUTOMATIC TRANSAXLE/TRANSMISSION - 6F35 . TEST the system for normal operation.
  - No : INSPECT the floor shifter wiring harness for damage and repair as necessary. If the floor shifter wiring harness is not damaged, INSTALL a new selector lever knob. REFER to SELECTOR LEVER KNOB . CLEAR the DTCs. TEST the system for normal operation.