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Pinpoint Test

  1. RETRIEVE Diagnostic Trouble Codes (DTCs) FROM THE Powertrain Control Module (PCM) Key ON Engine OFF (KOEO) SELF-TEST
    1. Ignition ON.
    2. Using a scan tool, perform Powertrain Control Module (PCM) Key ON Engine OFF (KOEO) self-test to retrieve Diagnostic Trouble Codes (DTCs).
    • Are any charging system Diagnostic Trouble Codes (DTCs) present in the Powertrain Control Module (PCM)? 
  2. CHECK BATTERY CONDITION
    1. Ignition OFF.
    2. Carry out the battery condition test. REFER to DIAGNOSTIC ROUTINE A .
    • Does the battery pass the condition test? 
    • Yes:  If the battery passed the condition test but required a recharge, REFER to SYMPTOM CHART: CHARGING SYSTEM to diagnose the charging system.

      If the battery passed the condition test and did not require a recharge, GO to step 3 .

    • No:  INSTALL a new battery. REFER to BATTERY .
  3. CHECK THE CHARGING SYSTEM VOLTAGE
      NOTE: Do not allow the engine rpm to exceed 2,000 rpm while carrying out this step or the generator may self-excite, resulting in default charging system output voltage. If engine rpm has exceeded 2,000 rpm, shut the vehicle off and restart the engine before carrying out this step.
    1. Start the engine.
    2. Measure the voltage of the battery.
    • For Diagnostic Trouble Code (DTC) B11D9:17, turn off all accessories and run the engine at 1,500 rpm for a minimum of 2 minutes.
    • For Diagnostic Trouble Code (DTC) B11D9:16, turn on headlights and Heating, Ventilation, and Air Conditioning (HVAC) fan on high and run engine at 1,500 rpm for a minimum of 2 minutes.
    • Is the battery voltage between 13-15.2 volts? 
  4. CHECK THE All Terrain Control Module (ATCM) VOLTAGE SUPPLY CIRCUIT FOR HIGH RESISTANCE
    1. Ignition OFF.
    2. Disconnect: All Terrain Control Module (ATCM).
    3. START engine.
    4. Measure:
    Fig 1: Checking All Terrain Control Module (ATCM) Voltage Supply Circuit For High Resistance
    G07430759Courtesy of FORD MOTOR CO.
    • Is the voltage greater than 11 volts? 
    • Yes:  GO to step 5 .
    • No:  REPAIR circuit CBP35 (YE/GY) for high resistance.
  5. CHECK THE All Terrain Control Module (ATCM) GROUND CIRCUIT FOR HIGH RESISTANCE
    1. Ignition OFF.
    2. Measure:
      Fig 2: Checking All Terrain Control Module (ATCM) Ground Circuit For High Resistance
      G07430760Courtesy of FORD MOTOR CO.
      • Is the resistance less than 3 ohms? 
      • Yes:  GO to step 6 .
      • No:  REPAIR circuit GD214 (BK/BU) for high resistance.
  6. CHECK FOR CORRECT All Terrain Control Module (ATCM) OPERATION
    1. Ignition OFF.
    2. Disconnect and inspect All Terrain Control Module (ATCM) connector.
    3. Repair:
      • corrosion (install new connector or terminals - clean module pins)
      • damaged or bent pins - install new terminals/pins
      • pushed-out pins - install new pins as necessary
    4. Reconnect the All Terrain Control Module (ATCM) connector. Make sure it seats and latches correctly.
    5. Operate the system and determine if the concern is still present.
    • Is the concern still present? 
    • Yes:  CHECK On-Line Automotive Service Information System (OASIS) for any applicable Technical Service Bulletins (TSBs). If a Technical Service Bulletin (TSB) exists for this concern, DISCONTINUE this test and FOLLOW Technical Service Bulletin (TSB) instructions. If no Technical Service Bulletins (TSBs) address this concern, INSTALL a new All Terrain Control Module (ATCM). REFER to All Terrain Control Module (ATCM) .
    • No:  The system is operating correctly at this time. The concern may have been caused by module connections. Address the root cause of any connector or pin issues.
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