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

  1. A1 TEST THE BRAKE LIGHTS 
    • Apply the brake pedal and view the brake lights.
    • Do the brake lights illuminate? 
    1. Yes:  GO to  A2.
    2. No:  REFER to EXTERIOR LIGHTING .
  2. A2 TEST SJB FUSE 5 (10A) 
    • Ignition OFF.
    • Check fuse: Smart Junction Box (SJB) 5 (10A).
    • Is the resistance less than 5 ohms? 
    1. Yes:  GO to  A3.
    2. No:  INSTALL a new fuse. GO to  A3.
  3. A3 TEST THE BSIA POWER CIRCUIT 
    • Disconnect: Selector Lever Harness C3245.
    • Ignition ON.
    • Measure the voltage between selector lever harness C3245-1, circuit CET53 (BU/OG) and ground, while applying the brake pedal.
      Fig 1: Measuring Voltage Between Selector Lever Harness C3245-1, Circuit CET53 (BU/OG) And Ground
      G06283470Courtesy of FORD MOTOR CO.
    • Is the voltage greater than 10 volts? 
    1. Yes:  GO to  A6.
    2. No:  GO to  A4.
  4. A4 TEST THE BSIA POWER CIRCUIT FOR A SHORT TO GROUND 
    • Ignition OFF.
    • Disconnect: SJB  C2280F.
    • Measure the resistance between selector lever harness C3245-1, circuit CET53 (BU/OG) and ground.
      Fig 2: Measuring Resistance Between Selector Lever Harness C3245-1, Circuit CET53 (BU/OG) And Ground
      G06283471Courtesy of FORD MOTOR CO.
    • Is the resistance greater than 10,000 ohms? 
    1. Yes:  GO to  A5.
    2. No:  REPAIR circuit CET53 (BU/OG) for a short to ground. TEST the system for normal operation.
  5. A5 TEST THE BSIA POWER CIRCUIT FOR AN OPEN 
    • Measure the resistance between selector lever harness C3245-1, circuit CET53 (BU/OG) and SJB  C2280F-23, circuit CET53 (BU/OG).
      Fig 3: Measuring Resistance Between Selector Lever Harness C3245-1, Circuit CET53 (BU/OG) And SJB C2280F-23, Circuit CET53 (BU/OG)
      G06283472Courtesy of FORD MOTOR CO.
    • Is the resistance less than 5 ohms? 
    1. Yes:  INSTALL a new SJB  . TEST the system for normal operation.
    2. No:  REPAIR circuit CET53 (BU/OG) for an open.
  6. A6 TEST THE BSIA GROUND CIRCUIT 
    • Ignition OFF.
    • Measure the resistance between selector lever harness C3245-5, circuit GD116 (BK/VT) and ground.
      Fig 4: Measuring Resistance Between Selector Lever Harness C3245-5, Circuit GD116 (BK/VT) And Ground
      G06283473Courtesy of FORD MOTOR CO.
    • Is the resistance less than 5 ohms? 
    1. Yes:  INSTALL a new selector lever. REFER to SELECTOR LEVER .
    2. No:  REPAIR circuit GD116 (BK/VT). TEST the system for normal operation.
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