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Pinpoint Test C: TCS Does Not Operate Correctly

WARNING: This page is about a different car, the 2010 Mercury Mariner and 2010 Ford Escape. However, it is still accessible from the selected car via links, so may be relevant.
  1. C1 TEST THE IC 
    • Connect the scan tool.
    • Using the scan tool, monitor the TCS_DEPRES PID while cycling the TCS  .
    • Does the TCS_DEPRES PID cycle from yes to no? 
  2. C2 CHECK BJB FUSE 27 (10A) 
    • Ignition OFF.
    • Check fuse: Battery Junction Box (BJB) 27 (10A).
    • Is the resistance less than 5 ohms? 
    • Yes:  GO to C3  .
    • No:  GO to  C4.
  3. C3 TEST THE TCS POWER CIRCUIT FOR AN OPEN 
    • Disconnect: Selector Lever Harness C2096.
    • Disconnect: BJB  Fuse 27 (10A).
    • Measure the resistance between selector lever harness C2096-6, circuit CBP30 (YE/BU) and the output side of BJB  fuse 27 (10A).
      Fig 1: Checking Circuit
      G06098039Courtesy of FORD MOTOR CO.
    • Is the resistance less than 5 ohms? 
    • Yes:  GO to  C5.
    • No:  REPAIR circuit CBP30 (YE/BU). RECONNECT all components. TEST the system for normal operation.
  4. C4 TEST THE TCSPOWER CIRCUIT FOR A SHORT TO GROUND 
    • Disconnect: Selector Lever Harness C2096.
    • Disconnect: BJB  Fuse 27 (10A).
    • Measure the resistance between selector lever harness C2096-6, circuit CBP30 (YE/BU) and ground.
      Fig 2: Checking Circuit
      G06064254Courtesy of FORD MOTOR CO.
    • Is the resistance greater than 10,000 ohms? 
    • Yes:  GO to  C6.
    • No:  REPAIR circuit CBP30 (YE/BU). RECONNECT all components. TEST the system for normal operation.
  5. C5 TEST THE TCS SIGNAL CIRCUIT FOR AN OPEN 
    • Disconnect: PCM Transaxle C175T.
    • Measure the resistance between selector lever harness C2096-5, circuit CET34 (BN/GN) and PCM C175T-31, circuit CET34 (BN/GN).
      Fig 3: Checking Circuit
      G06098041Courtesy of FORD MOTOR CO.
    • Is the resistance less than 5 ohms? 
    • Yes:  GO to  C7.
    • No:  REPAIR circuit CET34 (BN/GN). RECONNECT all components. TEST the system for normal operation.
  6. C6 TEST THE TCS SIGNAL CIRCUIT FOR A SHORT TO GROUND 
    • Measure the resistance between selector lever harness C2096-5, circuit CET 34 (BN/GN) and ground.
      Fig 4: Checking Circuit
      G06064256Courtesy of FORD MOTOR CO.
    • Is the resistance greater than 10,000 ohms? 
    • Yes:  GO to C7  .
    • No:  REPAIR circuit CET34 (BN/GN). TEST the system for normal operation.
  7. C7 TEST THE TCS 
    • Measure the resistance between selector lever C2096-5 and C2096-6 component side, while cycling the TCS  .
      Fig 5: Measuring Resistance Between Selector Lever C2096-5 And C2096-6 Component Side
      G06064257Courtesy 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 POWERTRAIN CONTROL MODULE (PCM) or POWERTRAIN CONTROL MODULE (PCM) . 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 . TEST the system for normal operation.
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