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Home >> Ford >> 2000 >> Taurus LX, 3.0 2, AX4N >> Repair and Diagnosis >> External Pages >> Different car >> Section 1491 (Information Center - Instrumentation, Message Center And Warning Chimes) >> Diagnosis And Testing >> Instrumentation, Message Center and Warning Chimes >> Pinpoint Tests >> Pinpoint Test AS: DTC B1318 >> Pinpoint Test As: DTC B1318

Pinpoint Test As: DTC B1318

WARNING: This page is about a different car, the 2010 Mercury Mariner and 2010 Ford Escape. 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 AND CABLES .
  1. AS1 RECHECK THE IC DTCs 
    • Ignition ON.
    • Enter the following diagnostic mode on the scan tool: IC  Self-Test.
    • Clear the DTCs. Repeat the IC  self-test.
    • Is DTC B1318 still present? 
    • Yes:  GO to AS2  .
    • No:  The system is operating correctly at this time. The DTC may have been set due to a previous low battery voltage condition.
  2. AS2 CHECK FOR CHARGING SYSTEM DTCs IN THE PCM 
    • Enter the following diagnostic mode on the scan tool: PCM Self-Test.
    • Carry out the PCM Key ON Engine OFF (KOEO) self-test.
    • Retrieve the continuous memory DTCs from all modules.
    • Is DTC P0620, P0622, P0625, P0626 or P065B set in the PCM? 
  3. AS3 CHECK THE BATTERY CONDITION AND STATE OF CHARGE 
    • Check the battery condition and verify that the battery is fully charged. Refer to BATTERY, MOUNTING AND CABLES .
    • Is the battery OK and fully charged? 
  4. AS4 CHECK THE IC VOLTAGE SUPPLY 
    • Ignition OFF.
    • Measure and record the voltage at the battery.
    • Enter the following diagnostic mode on the scan tool: IC  DataLogger.
    • Monitor and compare the IC  voltage PID (VBAT_1) against the measured battery voltage.
    • Is the voltage within 0.2 volt of the recorded battery voltage? 
    • Yes:  GO to  AS7.
    • No:  GO to AS5  .
  5. AS5 CHECK THE IC VOLTAGE SUPPLY 
    • Ignition OFF.
    • Disconnect: IC  C220.
    • Ignition ON.
    • Measure the voltage between the IC  C220-19, circuit SBP26 (YE/RD), harness side and ground.
      Fig 1: Checking IC Voltage Supply
      G06262809Courtesy of FORD MOTOR CO.
    • Is the voltage within 0.2 volt of the recorded battery voltage? 
    • Yes:  GO to AS6  .
    • No:  REPAIR circuit SBP26 (YE/RD) for high resistance. CLEAR the DTC. REPEAT the self-test.
  6. AS6 CHECK THE IC GROUND CIRCUITS 
    • Ignition OFF.
    • Disconnect: Negative Battery Cable.
    • Measure the resistance between the IC  C220-9, circuit GD112 (BK/GN), harness side and ground; and between the IC  C220-10, circuit GD114 (BK/BU), harness side and ground.
      Fig 2: Checking IC Ground Circuits For An Open (1 Of 2)
      G06390647Courtesy of FORD MOTOR CO.
    • Is the resistance less than 5 ohms? 
    • Yes:  GO to AS7  .
    • No:  REPAIR circuits GD112 (BK/GN) and GD114 (BK/BU) for high resistance. CLEAR the DTCs. REPEAT the self-test.
  7. AS7 CHECK FOR CORRECT IC OPERATION 
    • Disconnect the IC  connector.
    • Check for:
      • corrosion
      • damaged pins
      • pushed-out pins
    • Connect the IC  connector and make sure it seats correctly.
    • Operate the system and verify the concern is still present.
    • Is the concern still present? 
    • Yes:  INSTALL a new IC  . REFER to INSTRUMENT CLUSTER (IC) . 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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