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Home >> Ford >> 2012 >> Explorer Limited, 3.5 8, AWD >> Repair and Diagnosis >> Heating, Ventilation & A/C (HVAC) >> HVAC Control Systems >> Climate Control - DATC >> Diagnostic Routine(S) >> Diagnostic Routine K >> Pinpoint Test

Pinpoint Test

NOTE: Access to the defrost/panel/floor mode door actuator motor connector in this pinpoint test is difficult. Before disconnecting the defrost/panel/floor mode door actuator motor connector, visually inspect the actuator and its harness for obvious damage. If no damage is evident, proceed with the test.
  1. CHECK THE HVAC MODULE FOR DTCs 
    1. Ignition ON.
    2. Using a scan tool, perform a HVAC module self-test.

    Are any DTCs present? 

    • Yes: For DTC B1086:11, GO to  3.

      For DTC B1086:12, GO to  4.

      For DTC B1086:13, GO to  6.

      For DTC B11E7:11, GO to  7.

      For DTC B11E7:15, GO to  9.

    • No: GO to 2  .
  2. CHECK THE DEFROST/PANEL/FLOOR MODE DOOR ACTUATOR OPERATION USING ACTIVE COMMANDS
    1. Ignition ON.
    2. Using a scan tool, view HVAC module PIDs  .
    3. Monitor the HVAC module PID AIR_MODE_DPOS.
    4. Select panel mode.
    5. Select the highest blower motor setting.
    6. Observe airflow while using the scan tool to operate the HVAC module active command AIR_MODE_DPOS, increasing and decreasing the percentage value.

    Does the airflow change between the defrost, panel and floor outlets when the active command is changed? 

  3. CHECK THE DEFROST/PANEL/FLOOR MODE DOOR ACTUATOR MOTOR CIRCUITS FOR A SHORT TO GROUND
    1. Ignition OFF.
    2. Disconnect: HVAC Module C228A.
    3. Disconnect: Defrost/Panel/Floor Mode Door Actuator.
    4. Measure:
      HVAC Module Ground
      G08033096
      G08033097
      C228A Ground
      Pin Circuit Measurement / Action Pin Circuit
      6 CH228 (YE/GY)
      G08033098
      		 - Ground
      7 CH229 (WH/BU)
      G08033099
      		 - Ground

    Are the resistances greater than 10, 000 ohms? 

    • Yes: GO to  5.
    • No: REPAIR the circuit in question.
  4. CHECK THE DEFROST/PANEL/FLOOR MODE DOOR ACTUATOR MOTOR CIRCUITS FOR A SHORT TO VOLTAGE
    1. Ignition OFF.
    2. Disconnect: HVAC Module C228A.
    3. Disconnect: Defrost/Panel/Floor Mode Door Actuator.
    4. Ignition ON.
    5. Measure:
      HVAC Module Ground
      G08033100
      G08033101
      C228A Ground
      Pin Circuit Measurement / Action Pin Circuit
      6 CH228 (YE/GY)
      G08033102
      		 - Ground
      7 CH229 (WH/BU)
      G08033103
      		 - Ground

    Is any voltage present? 

    • Yes: REPAIR the circuit in question.
    • No: GO to 5  .
  5. CHECK THE DEFROST/PANEL/FLOOR MODE DOOR ACTUATOR MOTOR CIRCUITS FOR A SHORT TOGETHER
    1. Ignition OFF.
    2. Disconnect: Defrost/Panel/Floor Mode Door Actuator.
    3. Measure:
      HVAC Module HVAC Module
      G08033104
      G08033105
      C228A C228A
      Pin Circuit Measurement / Action Pin Circuit
      6 CH228 (YE/GY)
      G08033106
      		 7 CH229 (WH/BU)

    Is the resistance greater than 10, 000 ohms? 

    • Yes: GO to  14.
    • No: REPAIR the circuits.
  6. CHECK THE DEFROST/PANEL/FLOOR MODE DOOR ACTUATOR MOTOR CIRCUITS FOR AN OPEN
    1. Ignition OFF.
    2. Disconnect: HVAC Module C228A.
    3. Disconnect: Defrost/Panel/Floor Mode Door Actuator.
    4. Measure:
      HVAC Module Defrost/Panel/Floor Mode Door Actuator
      G08033107
      G08033108
      C228A C236
      Pin Circuit Measurement / Action Pin Circuit
      6 CH228 (YE/GY)
      G08033109
      		 6 CH228 (YE/GY)
      7 CH229 (WH/BU)
      G08033110
      		 1 CH229 (WH/BU)

    Are the resistances less than 3 ohms? 

    • Yes: GO to  14.
    • No: REPAIR the circuit in question.
  7. CHECK THE DEFROST/PANEL/FLOOR MODE DOOR ACTUATOR FEEDBACK CIRCUIT FOR A SHORT TO GROUND
    1. Ignition OFF.
    2. Disconnect: HVAC Module C228A.
    3. Disconnect: Defrost/Panel/Floor Mode Door Actuator.
    4. Measure:
      HVAC Module Ground
      G08033111
      G08033112
      C228A Ground
      Pin Circuit Measurement / Action Pin Circuit
      21 VH436 (YE/VT)
      G08033113
      		 - Ground

    Is the resistance greater than 10, 000 ohms? 

    • Yes: GO to 8  .
    • No: REPAIR the circuit.
  8. CHECK THE SIGNAL RETURN CIRCUIT FOR A SHORT TO THE DEFROST/PANEL/FLOOR MODE DOOR ACTUATOR FEEDBACK CIRCUIT
    1. Measure:
      HVAC Module HVAC Module
      G08033114
      G08033115
      C228A C228A
      Pin Circuit Measurement / Action Pin Circuit
      21 VH436 (YE/VT)
      G08033116
      		 23 RH111 (GY/BU)

    Is the resistance greater than 10, 000 ohms? 

    • Yes: GO to  14.
    • No: REPAIR the circuits.
  9. CHECK THE DEFROST/PANEL/FLOOR MODE DOOR ACTUATOR FEEDBACK CIRCUIT FOR A SHORT TO VOLTAGE
    1. Ignition OFF.
    2. Disconnect: HVAC Module C228A.
    3. Disconnect: Defrost/Panel/Floor Mode Door Actuator.
    4. Ignition ON.
    5. Measure:
      HVAC Module Ground
      G08033117
      G08033118
      C228A Ground
      Pin Circuit Measurement / Action Pin Circuit
      21 VH436 (YE/VT)
      G08033119
      		 - Ground

    Is any voltage present? 

    • Yes: REPAIR the circuit.
    • No: GO to 10  .
  10. CHECK THE REFERENCE VOLTAGE CIRCUIT FOR AN OPEN
    1. Ignition OFF.
    2. Measure:
      HVAC Module Defrost/Panel/Floor Door Actuator
      G08033120
      G08033121
      C228A C236
      Pin Circuit Measurement / Action Pin Circuit
      24 LH111 (BN/WH)
      G08033122
      		 2 LH111 (BN/WH)

    Is the resistance less than 3 ohms? 

    • Yes: GO to 11  .
    • No: REPAIR the circuit.
  11. CHECK THE REFERENCE VOLTAGE CIRCUIT FOR A SHORT TO THE DEFROST/PANEL/FLOOR MODE DOOR ACTUATOR FEEDBACK CIRCUIT
    1. Ignition OFF.
    2. Measure:
      HVAC Module HVAC Module
      G08033123
      G08033124
      C228A C228A
      Pin Circuit Measurement / Action Pin Circuit
      21 VH436 (YE/VT)
      G08033125
      		 24 LH111 (BN/WH)

    Is the resistance greater than 10, 000 ohms? 

    • Yes: GO to 12  .
    • No: REPAIR the circuits.
  12. CHECK THE DEFROST/PANEL/FLOOR MODE DOOR ACTUATOR FEEDBACK CIRCUIT FOR AN OPEN
    1. Measure:
      HVAC Module Defrost/Panel/Floor Door Actuator
      G08033126
      G08033127
      C228A C236
      Pin Circuit Measurement / Action Pin Circuit
      21 VH436 (YE/VT)
      G08033128
      		 4 VH436 (YE/VT)

    Is the resistance less than 3 ohms? 

    • Yes: GO to 13  .
    • No: REPAIR the circuit.
  13. CHECK THE DEFROST/PANEL/FLOOR MODE DOOR ACTUATOR RETURN CIRCUIT FOR AN OPEN
    1. Measure:
      HVAC Module Defrost/Panel/Floor Door Actuator
      G08033129
      G08033130
      C228A C236
      Pin Circuit Measurement / Action Pin Circuit
      23 RH111 (GY/BU)
      G08033131
      		 3 RH111 (GY/BU)

    Is the resistance less than 3 ohms? 

    • Yes: GO to 14  .
    • No: REPAIR the circuit.
  14. CHECK FOR CORRECT DEFROST/PANEL/FLOOR MODE DOOR ACTUATOR OPERATION
    1. Ignition OFF.
    2. Disconnect and inspect the defrost/panel/floor mode door actuator 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 defrost/panel/floor mode door actuator connector. Make sure it seats and latches correctly.
    5. Reconnect the HVAC module connectors. Make sure they seat and latch correctly.
    6. Clear the DTCs  .
    7. Operate the system and determine if the concern is still present.

    Is the concern still present? 

    • Yes: INSTALL a new Defrost/Panel/Floor Mode Door Actuator, REFER to Mode Door Actuator - Defrost-Panel-Floor Door . TEST the system for normal operation. If the concern is still present, GO to 15  .
    • 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.
  15. MODULE ACTUATOR POSITION CALIBRATION
    NOTE: The purpose of the module actuator position calibration is to allow the HVAC module to reinitialize and calibrate the actuator stop points.
    1. Ignition OFF.
    2. Disconnect and inspect all HVAC module connectors.
    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 HVAC module connectors. Make sure they seat and latch correctly.
    5. Ignition ON.
    6. Clear the DTCs  .
    7. Using a scan tool, perform HVAC Module self-test.
    8. Select any position except OFF.
    9. NOTE: The HVAC module initializes and calibrates the actuators. Calibration of the actuators takes approximately 30 seconds.

      Operate the system and determine if the concern is still present.

    Is the concern still present? 

    • Yes: CHECK OASIS  for any applicable TSBs  . If a TSB exists for this concern, DISCONTINUE this test and FOLLOW TSB instructions. If no TSBs  address this concern, INSTALL a new HVAC module. REFER to Heating Ventilation Air Conditioning (HVAC) Module .
    • No: The system is now operating correctly at this time. The concern may have been caused by a foreign object in the HVAC case or temporary binding that restricted actuator door travel. CHECK any actuator external linkage. If condition recurs, INSPECT actuator linkage and door for binding and CHECK HVAC case for foreign objects.
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