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Home >> Mercury >> 2010 >> Milan Base, Standard >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 15 (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 variant/trim than selected.
  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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