LEMON Manuals: Even more car manuals for everyone
Home >> Mercury >> 2010 >> Milan Base, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 943 (Automatic Transmission External Controls - Cd4E) >> Diagnostic Tests >> External Controls >> Pinpoint Test >> Pinpoint Test A: The Shift Interlock System Does Not Release Or Lock Correctly

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

WARNING: This page is about a different car, the 2007 Mercury Mariner and 2007 Ford Escape. However, it is still accessible from the selected car via links, so may be relevant.
  1. A1 CHECK THE BRAKE PEDAL POSITION (BPP) SWITCH 
    • Depress the brake pedal.
    • Did the stop lamps illuminate with the brake pedal depressed? 
    1. YES  : Go to  A2.
    2. NO  : REFER to EXTERIOR LIGHTING article.
  2. A2 CHECK FUSE F4 (10A) 
    • Key in OFF position.
    • Check fuse: F4 (10A)
    • Is the resistance less than 5 ohms? 
    1. YES  : Go to  A4.
    2. NO  : Go to  A3.
  3. A3 CHECK CIRCUIT 1715 (RD) FOR SHORT TO GROUND 
    • Key in OFF position.
    • Disconnect: Ignition Switch C250
    • Disconnect: Fuse F4 (10A)
      • Fig 1: Checking Circuit For Short To Ground
      GF0025253Courtesy of FORD MOTOR CO.
    • Measure the resistance between output side of fuse F4 (10A) and ground.
    • Is the resistance greater than 10,000 ohms? 
    1. YES  : Go to  A6.
    2. NO  : REPAIR the circuit. TEST the system for normal operation.
  4. A4 CHECK CIRCUIT 1715 (RD) FOR AN OPEN 
    • Key in OFF position.
    • Disconnect: Ignition Switch C250
    • Disconnect: Fuse F4 (10A)
      • Fig 2: Checking Circuit For Open
      GF0025254Courtesy of FORD MOTOR CO.
    • Measure the resistance between output side of fuse F4 (10A) and ignition switch C250-4.
    • Is the resistance less than 5 ohms? 
    1. YES  : Go to  A5.
    2. NO  : REPAIR the circuit. TEST the system for normal operation.
  5. A5 CHECK THE IGNITION SWITCH 
      Fig 3: Checking Ignition Switch
      GF0025255Courtesy of FORD MOTOR CO.
    • Measure the resistance between ignition switch C250-4 and C250-5, component side with the ignition key in and with the ignition key out.
    • Is the resistance less than 5 ohms with the ignition key in and greater than 10,000 ohms with the ignition key out? 
    1. YES  : Go to  A7.
    2. NO  : INSTALL a new ignition switch. REFER to STEERING COLUMN SWITCHES article. TEST the system for normal operation.
  6. A6 CHECK CIRCUIT 158 (BK/PK) FOR SHORT TO GROUND 
    • Disconnect: Smart Junction Box (SJB) C2280E
      • Fig 4: Checking Circuit For Short To Ground
      GF0025256Courtesy of FORD MOTOR CO.
    • Measure the resistance between ignition switch C250-5 and ground.
    • Is the resistance greater than 10,000 ohms? 
    1. YES  : INSTALL a new SJB. REFER to MULTIFUNCTION ELECTRONIC MODULES article. TEST the system for normal operation.
    2. NO  : REPAIR the circuit. TEST the system for normal operation.
  7. A7 CHECK CIRCUIT 158 (BK/PK) FOR AN OPEN 
    • Disconnect: Smart Junction Box (SJB) C2280E
      • Fig 5: Checking Circuit For Open
      GF0025257Courtesy of FORD MOTOR CO.
    • Measure the resistance between ignition switch C250-5 and SJB C2280E-29.
    • Is the resistance less than 5 ohms? 
    1. YES  : Go to  A8.
    2. NO  : REPAIR the circuit. TEST the system for normal operation.
  8. A8 CHECK CIRCUIT 605 (RD) FOR SHORT TO GROUND 
    • Disconnect: Floor Shifter C2096
    • Disconnect: SJB C2280A
      • Fig 6: Checking Circuit For Short To Ground
      GF0025258Courtesy of FORD MOTOR CO.
    • Measure the resistance between SJB C2280A-9 and ground.
    • Is the resistance greater than 10,000 ohms? 
    1. YES  : Go to  A9.
    2. NO  : REPAIR the circuit. TEST the system for normal operation.
  9. A9 CHECK CIRCUIT 605 (RD) FOR AN OPEN 
    • Disconnect: Floor Shifter C2096
    • Disconnect: SJB C2280A
      • Fig 7: Checking Circuit For Open
      GF0025259Courtesy of FORD MOTOR CO.
    • Measure the resistance between SJB C2280A-9 and floor shifter C2096-3.
    • Is the resistance less than 5 ohms? 
    1. YES  : Go to  A10.
    2. NO  : REPAIR the circuit. TEST the system for normal operation.
  10. A10 CHECK SMART JUNCTION BOX (SJB) 
    • Connect: Ignition Switch C250
    • Connect: SJB C2280E
    • Connect: SJB C2280A
    • Key in ON position.
    • Apply the brake.
      • Fig 8: Checking Circuit For Voltage
      GF0025260Courtesy of FORD MOTOR CO.
    • Measure the voltage between floor shifter C2096-3 and ground.
    • Is the voltage greater than 10 volts? 
    1. YES  : Go to  A11.
    2. NO  : INSTALL a new SJB. REFER to MULTIFUNCTION ELECTRONIC MODULES article. TEST the system for normal operation.
  11. A11 CHECK CIRCUIT 57 (BK) FOR AN OPEN 
      Fig 9: Checking Circuit For Open
      GF0025261Courtesy of FORD MOTOR CO.
    • Measure the resistance between floor shifter C2096-1 and ground.
    • Is the resistance less than 5 ohms? 
    1. YES  : INSTALL a new brake shift interlock module. REFER to Selector Lever Cable .
    2. NO  : REPAIR the circuit. TEST the system for normal operation.
scientia non olet · About LEMON Manuals