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Home >> Ford >> 2009 >> Flex Limited, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 2114 (Handles, Locks, Latches And Entry Systems) >> Diagnosis And Testing >> Handles, Locks, Latches and Entry Systems >> Pinpoint Tests >> Pinpoint Test AC: DTC B1318 >> Pinpoint Test Ac: DTC B1318

Pinpoint Test Ac: DTC B1318

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.
NOTE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.
NOTE: Failure to disconnect the battery when instructed will result in false resistance readings. Refer to BATTERY, MOUNTING & CABLES -- FUSION, MILAN & MKZ article.
  1. AC1 RECHECK THE DDM DTCs 
    • Ignition ON.
    • Enter the following diagnostic mode on the scan tool: DDM Self-Test.
    • Clear the DTCs. Repeat the DDM self-test.
    • Is DTC B1318 still present? 
    • Yes  : GO to AC2.
    • No  : The system is operating normally at this time. The DTC may have been set previously during battery charging or while jump starting the vehicle.
  2. AC2 CHECK FOR CHARGING SYSTEM DTCs IN THE PCM 
    • Enter the following diagnostic mode on the scan tool: PCM Self-Test.
    • Retrieve the continuous memory DTCs from the PCM.
    • Is DTC P0620, P0625, P0626 or P065B set in the PCM? 
  3. AC3 CHECK THE BATTERY CONDITION AND STATE OF CHARGE 
  4. AC4 CHECK THE DDM VOLTAGE SUPPLY 
    • Measure and record the voltage at the battery.
    • Disconnect: DDM C568b.
    • Ignition ON.
    • Measure the voltage between the DDM C568b-1, circuit SBP12 (GN/ RD), harness side and ground.
      Fig 1: Measuring Voltage Between DDM C568b-1, Circuit SBP12 (GN/RD) And Ground
      G06075837Courtesy of FORD MOTOR CO.
    • Is the voltage within 0.2 volt of the recorded battery voltage? 
    • Yes  : GO to AC5.
    • No  : REPAIR the circuit for high resistance. CLEAR the DTCs. REPEAT the self-test.
  5. AC5 CHECK THE DDM GROUND CIRCUIT 
    • Ignition OFF.
    • Disconnect: Negative Battery Cable.
    • Measure the resistance between the DDM C568b-24, circuit GD126 (BK/WH), harness side and ground.
      Fig 2: Measuring Resistance Between DDM C568b-24, Circuit GD126 (BK/WH) And Ground
      G06075838Courtesy of FORD MOTOR CO.
    • Is the resistance less than 5 ohms? 
    • Yes  : GO to AC6.
    • No  : REPAIR the circuit for high resistance. TEST the system for normal operation.
  6. AC6 CHECK FOR CORRECT DDM OPERATION 
    • Connect: Negative Battery Cable.
    • Disconnect the DDM connectors.
    • Check for:
      • corrosion
      • damaged pins
      • pushed-out pins
    • Connect the DDM connectors and make sure they seat correctly.
    • Operate the system and verify the concern is still present.
    • Is the concern still present? 
    • Yes  : INSTALL a new DDM. REFER to DRIVER DOOR MODULE (DDM)  in this service information. TEST the system for normal operation.
    • No  : The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.
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