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Pinpoint Test R: No Power To The Scan Tool

WARNING: This page is about a different car, the 2008 Mercury Mariner and 2008 Ford Escape. However, it is still accessible from the selected car via links, so may be relevant.
  1. R1 CHECK DLC PINS FOR DAMAGE 
    NOTE: Most faults are due to connector and/or wiring concerns. Carry out a thorough inspection and verification before proceeding with the Pinpoint Test.
    • Disconnect the scan tool cable from the DLC.
    • Inspect the DLC pins 4, 5 and 16 for damage.
      • Fig 1: Checking DLC Pins For Damage
      GF0001414Courtesy of FORD MOTOR CO.
    • Are the DLC pins 4, 5 and 16 OK? 
    1. YES  : Go to  R2.
    2. NO  : REPAIR the DLC as necessary. REPEAT the network test with the scan tool.
  2. R2 CHECK THE VOLTAGE TO THE SCAN TOOL CIRCUIT 956 (OG/LG) 
    • Measure the voltage between the DLC C251-16, circuit SBP20 (GN/RD), harness side and ground.
      • Fig 2: Measuring Voltage
      G03903012Courtesy of FORD MOTOR CO.
    • Is the voltage greater than 10 volts? 
    1. YES  : Go to  R3.
    2. NO  : VERIFY the smart junction box (SJB) fuse 20 (15A) is OK. If OK, REPAIR the circuit. REPEAT the network test with the scan tool.
  3. R3 CHECK THE DLC GROUND CIRCUITS FOR AN OPEN 
    • Measure the resistance between the DLC C251-4, circuit GD112 (BK/GN), harness side and ground; and between the DLC C251-5, circuit GD114 (BK/BU), harness side and ground.
      • Fig 3: Measuring Resistance
      G03903013Courtesy of FORD MOTOR CO.
    • Are the resistances less than 5 ohms? 
    1. YES  : REPAIR the scan tool. REPEAT the network test with the scan tool.
    2. NO  : REPAIR the circuit in question. REPEAT the network test with the scan tool.
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