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Home >> Mercury >> 2008 >> Milan Base, 3.0 1, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1513 (Automatic Transaxle External Controls AISIN Aw21/6F35 (Except Hybrid)) >> Diagnosis And Testing >> External Controls >> Pinpoint Tests >> Pinpoint Test B: TCS Does Not Operate Correctly (Vehicles Equipped With A 2.5L Engine Only)

Pinpoint Test B: TCS Does Not Operate Correctly (Vehicles Equipped With A 2.5L Engine Only)

WARNING: This page is about a different car, the 2010 Mercury Milan, 2010 Lincoln MKZ, and 2010 Ford Fusion. However, it is still accessible from the selected car via links, so may be relevant.
  1. B1 TEST 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? 
  2. B2 TEST BJB FUSE 47 (10A) 
    • Check fuse: Battery Junction Box (BJB) fuse 47 (10A).
    • Is the resistance less than 5 ohms? 
    • Yes:  GO to  B3.
    • No:  GO to  B6.
  3. B3 CHECK FOR VOLTAGE AT THE SELECTOR LEVER CONNECTOR 
    • Disconnect: Selector Lever Electrical C3233.
    • Ignition ON.
    • Measure the voltage between selector lever harness C3233-7, circuit CBK03 (GY), vehicle harness side and ground.
      Fig 1: Measuring Voltage Between Selector Lever Harness Circuit CBK03 (GY) & Ground
      G06275621Courtesy of FORD MOTOR CO.
    • Is the voltage greater than 10 volts? 
    • Yes:  GO to  B5.
    • No:  GO to  B4.
  4. B4 TEST THE TCS POWER SUPPLY CIRCUIT FOR AN OPEN 
    • Ignition OFF.
    • Disconnect: BJB fuse 47 (10A).
    • Measure the resistance between the output side of BJB fuse 47 (10A) and selector lever harness C3233-7 circuit CBK03 (GY), vehicle harness side.
      Fig 2: Checking Circuit CBK03 For An Open
      G06275622Courtesy of FORD MOTOR CO.
    • Is the resistance less than 5 ohms? 
    • Yes:  Install a new BJB  .
    • No:  REPAIR circuit CBK03 (GY) for an open. TEST the system for normal operation.
  5. B5 TEST THE TCS 
    • Measure the resistance between selector lever harness C3533 pins 6 and 7, component side, while cycling the TCS.
      Fig 3: Measuring Resistance Between Selector Lever Harness C3533 Pins 6 & 7
      G06275623Courtesy of FORD MOTOR CO.
    • Is the resistance less than 5 ohms when pressed and greater than 10,000 ohms when released? 
    • Yes:  GO to  B7.
    • No:  INSPECT the selector lever wiring harness for damage. REPAIR the wiring harness as required. If the selector lever wiring harness is not damaged, INSTALL a new selector lever knob. REFER to Installation . TEST the system for normal operation.
  6. B6 TEST THE TCS SIGNAL CIRCUIT FOR A SHORT TO GROUND 
    • Ignition OFF.
    • Disconnect: PCM C175T.
    • Measure the resistance between selector lever harness C3233-6, circuit CET34 (BN/GN) and ground.
      Fig 4: Checking Circuit CBK03 For Short To Ground Or Circuit CET34 For Short To Ground
      G06275624Courtesy of FORD MOTOR CO.
    • Is the resistance greater than 10,000? 
    • Yes:  REPAIR circuit CBK03 (GY) for a short to ground. INSTALL a new fuse. TEST the system for normal operation.
    • No:  REPAIR circuit CET34 (BN/GN) for a short to ground. INSTALL a new fuse. TEST the system for normal operation.
  7. B7 TEST THE TCS SIGNAL CIRCUIT FOR AN OPEN CIRCUIT 
    • Disconnect: PCM C175T.
    • Measure the resistance between selector lever harness C3233-6, circuit CET34 (BN/GN) and PCM C175T-31, circuit CET34 (BN/GN).
      Fig 5: Checking Circuit CET34 For An Open
      G06275625Courtesy of FORD MOTOR CO.
    • Is the resistance less then 5 ohms? 
    • Yes:  INSTALL a new PCM. REFER to INSTALLATION .
    • No:  REPAIR circuit CET34 (BN/GN) for an open. TEST the system for normal operation.
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