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Home >> Mercury >> 2008 >> Milan Base, 3.0 1, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1514 (Automatic Transaxle External Controls (Hybrid)) >> Diagnosis And Testing >> External Controls >> Pinpoint Test >> Pinpoint Test A: The Brake Shift Interlock System Does Not Release/Lock Correctly

Pinpoint Test A: The Brake Shift Interlock System Does Not Release/Lock Correctly

WARNING: This page is about a different car, the 2010 Mercury Milan and 2010 Ford Fusion. However, it is still accessible from the selected car via links, so may be relevant.
  1. A1 TEST THE BRAKE LIGHTS 
    • Apply the brake pedal and view the brake lights.
    • Do the brake lights illuminate? 
  2. A2 TEST SJB FUSE 5 (10A) 
    • Check fuse: Smart Junction Box (SJB) 5 (10A).
    • Is the resistance less than 5 ohms? 
    • Yes:  GO to  A3.
    • No:  INSTALL a new fuse. GO to  A3.
  3. A3 TEST BSIA POWER CIRCUIT 
    • Disconnect: Selector Lever Electrical C3233.
    • Ignition ON.
    • Measure the voltage between selector lever harness C3233-1, circuit CET53 (BU/OG), vehicle harness side and ground, while applying the brake pedal.
      Fig 1: Measuring Voltage Between Selector Lever Harness C3233-1, Circuit CET53 (BU/OG), Vehicle Harness Side & Ground
      G06275749Courtesy of FORD MOTOR CO.
    • Is the voltage greater than 10 volts? 
    • Yes:  GO to  A6.
    • No:  GO to  A4.
  4. A4 TEST THE BSIA POWER CIRCUIT FOR A SHORT TO GROUND 
    • Ignition OFF.
    • Disconnect: SJB  C2280C.
    • Measure the resistance between selector lever harness C3233-1, circuit CET53 (BU/OG), vehicle harness side and ground.
      Fig 2: Checking Circuit
      G06275750Courtesy of FORD MOTOR CO.
    • Is the resistance greater than 10,000 ohms? 
    • Yes:  GO to  A5.
    • No:  REPAIR the circuit. TEST the system for normal operation.
  5. A5 TEST THE BSIA POWER CIRCUIT FOR AN OPEN 
    • Ignition OFF.
    • Measure the resistance between the selector lever harness C3233-1, circuit CET53 (BU/OG), vehicle harness side and SJB  C2280C-23, circuit CET53 (BU/OG), vehicle harness side.
      Fig 3: Checking Circuit
      G06275751Courtesy of FORD MOTOR CO.
    • Is the resistance less than 5 ohms? 
    • Yes:  INSTALL a new SJB  . TEST the system for normal operation.
    • No:  REPAIR the circuit. TEST the system for normal operation.
  6. A6 TEST THE BSIA GROUND CIRCUIT 
    • Ignition OFF.
    • Measure the resistance between selector lever harness C3233-5, circuit GD116 (BK/VT), vehicle harness side and ground.
      Fig 4: Checking Circuit
      G06275752Courtesy of FORD MOTOR CO.
    • Is the resistance less than 5 ohms? 
    • Yes:  INSTALL a new selector lever. REFER to Installation .
    • No:  REPAIR the circuit. TEST the system for normal operation.
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