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Home >> Mercury >> 2008 >> Milan Base, 3.0 1, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1831 (Automatic Transaxle External Controls - AISIN Aw21/6F35 (Except Hybrid)) >> Diagnosis And Testing >> External Controls >> Pinpoint Tests >> 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 2011 Mercury Milan, 2011 Lincoln MKZ, and 2011 Ford Fusion. However, it is still accessible from the selected car via links, so may be relevant.
  1. A1 CHECK DTCs 
    • Ignition ON.
    • Connect the scan tool.
    • Is DTC B2575 set? 
      1. Yes  : GO to A2  .
      2. No  : The issue may not be in the Brake Shift Interlock Actuator (BSIA) electrical system. GO to SYMPTOM TABLE - EXTERNAL CONTROLS  in this service information.
  2. A2 CHECK FUSE 5 (10A) 
    • Ignition OFF.
    • Remove Smart Junction Box (SJB) fuse 5 (10A).
    • Check fuse: SJB 5 (10A).
    • Is the resistance less than 5 ohms? 
      1. Yes  : GO to A3  .
      2. No  : GO to  A4.
  3. A3 CHECK THE POWER CIRCUIT FOR VOLTAGE 
    • Disconnect: Selector Lever 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 And Ground
      G06275749Courtesy of FORD MOTOR CO.
    • Is the voltage greater than 10 volts? 
      1. Yes  : GO to  A6.
      2. No  : GO to A5  .
  4. A4 CHECK THE 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: Measuring Resistance Between Selector Lever Harness C3233-1, Circuit CET53 (BU/OG), Vehicle Harness Side And Ground
      G06275750Courtesy 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. CLEAR the DTCs. TEST the system for normal operation.
  5. A5 CHECK THE 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: Measuring Resistance Between Selector Lever Harness C3233-1, Circuit CET53 (BU/OG), Vehicle Harness Side And SJB C2280C-23, Circuit CET53 (BU/OG), Vehicle Harness Side
      G06275751Courtesy of FORD MOTOR CO.
    • Is the resistance less than 5 ohms? 
      1. Yes  : INSTALL a new SJB. CLEAR the DTCs. TEST the system for normal operation.
      2. No  : REPAIR circuit CET53 (BU/OG) for an open. CLEAR the DTCs. TEST the system for normal operation.
  6. A6 CHECK THE GROUND CIRCUIT FOR AN OPEN 
    • Ignition OFF.
    • Measure the resistance between selector lever harness C3233-5, circuit GD116 (BK/VT), vehicle harness side and ground.
      Fig 4: Measuring Resistance Between Selector Lever Harness C3233-5, Circuit GD116 (BK/VT), Vehicle Harness Side And Ground
      G06275752Courtesy of FORD MOTOR CO.
    • Is the resistance less than 5 ohms? 
      1. Yes  : INSTALL a new selector lever. REFER to SELECTOR LEVER - FUSION/MILAN  or SELECTOR LEVER - MKZ  in this service information.
      2. No  : REPAIR circuit GD116 (BK/VT) for an open. CLEAR the DTCs. TEST the system for normal operation.
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