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

A1 CHECK DTCs
- Ignition ON.
- Connect the scan tool.
- Are DTCs B1319: 11 and/or B1319: 15 set?
- Yes: GO to A2.
- No: GO to A7.
A2 CHECK THE BCM FUSE 18 (10A)
- Ignition OFF.
- Remove Body Control Module (BCM) fuse 18 (10A).
- Check fuse: BCM 18 (10A).
- Is the resistance less than 5 ohms?
- Yes: Reinstall the fuse. GO to A3.
- No: GO to A4.
A3 CHECK THE BCM POWER CIRCUIT
- Disconnect: Floor Shifter Harness C3245.
- Inspect for damaged or pushed out terminals. Repair as necessary.
- Ignition ON.
- Measure the voltage between the floor shifter harness C3245, circuit CET53 (BU/OG) and ground while applying the brake pedal.
- Is the voltage greater than 10 volts?
- Yes: GO to A6.
- No: GO to A5.
A4 CHECK THE BSIA POWER CIRCUIT FOR A SHORT TO GROUND
- Disconnect: BCM C2280B.
- Measure the resistance between floor shifter harness C3245-3, circuit CET53 (BU/OG) harness side and ground.
  
  Fig 1: Checking BSIA Power Circuit For Short To Ground
  Courtesy of FORD MOTOR CO.
- Is the resistance greater than 10,000 ohms?
- Yes: INSTALL a new BCM. TEST the system for normal operation .
- No: REPAIR circuit CET53 (BU/OG) for a short to ground. CLEAR the DTCs. TEST the system for normal operation.
A5 CHECK THE BSIA POWER CIRCUIT FOR AN OPEN
- Measure the resistance between floor shifter harness C3245-3, circuit CET53 (BU/OG) and BCM C2280B-49, circuit CET53 (BU/OG).
  
  Fig 2: Checking BSIA Power Circuit For Open
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?
- Yes: INSTALL a new BCM . MULTIFUNCTION ELECTRONIC MODULES . TEST the system for normal operation.
- No: REPAIR circuit CET53 (BU/OG) for an open. CLEAR the DTCs. TEST the system for normal operation.
A6 CHECK THE BSIA GROUND CIRCUIT FOR AN OPEN
- Ignition OFF.
- Measure the resistance between floor shifter harness C3245-4, circuit GD115 (BK/GY) and ground.
  
  Fig 3: Checking BSIA Ground Circuit For Open
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?
- Yes: GO to A7.
- No: REPAIR circuit GD112 (BK/GN) for an open. CLEAR the DTCs. TEST the system for normal operation.
A7 CHECK THE BSIA WITH THE SELECTOR LEVER CABLE DISCONNECTED
- If disconnected, connect the floor shifter harness C3245.
- Disconnect the selector lever cable at the selector lever.
- Ignition ON.
- Apply the brake pedal and move the selector lever out of the PARK position.
- Does the BSIA release the selector lever?
- Yes: CHECK the selector lever cable function and adjust the cable if necessary. REFER to SELECTOR LEVER CABLE ADJUSTMENT in this service information.
- No: INSTALL a new BSIA . REFER to SELECTOR LEVER in this service information. TEST the system for normal operation.
  SYSTEM WIRING DIAGRAMS
  
  NOTE: Read and record all DTCs.