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Home >> Ford >> 2022 >> Transit Connect Titanium, Gas/Ethanol >> Repair and Diagnosis >> Heating, Ventilation & A/C (HVAC) >> HVAC Control Systems >> Climate Control System - General Information (2 Of 2) >> Diagnosis And Testing >> Climate Control System - Vehicles With: Dual Automatic Temperature Control (DATC) >> Pinpoint Tests >> Pinpoint Test T: B10B3:11, B10B3:15, B10B4:11, B10B4:15, B10B5:11, B10B5:15, B10B6:11, B10B6:15

Pinpoint Test T: B10B3:11, B10B3:15, B10B4:11, B10B4:15, B10B5:11, B10B5:15, B10B6:11, B10B6:15

  1. Refer to Wiring Diagrams AUTOMATIC CLIMATE CONTROL SYSTEM for schematic and connector information.

    Normal Operation and Fault Conditions 

    The air discharge sensors supply a varying voltage to the HVAC control module based on the temperature of the air being discharged from the vent. The HVAC control module adjusts the system based on the voltage from each sensor.

    Each air discharge sensor is supplied voltage from the HVAC control module and all sensors share a common sensor ground. An open, a short to ground, a short to voltage on one or more of these circuits or a failed air discharge sensor causes the HVAC control module to set one or more Diagnostic Trouble Codes (DTCs).

    DTC Fault Trigger Conditions 

    DTC Description Fault Trigger Condition
    HVAC B10B3:11 Right Panel Air Discharge Temperature: Circuit Short To Ground Module senses erratic voltages from the air discharge temperature sensor.
    HVAC B10B3:15 Right Panel Air Discharge Temperature: Circuit Short To Battery Or Open Module senses erratic voltages from the air discharge temperature sensor.
    HVAC B10B4:11 Right Floor Air Discharge Temperature: Circuit Short To Ground Module senses erratic voltages from the air discharge temperature sensor.
    HVAC B10B4:15 Right Floor Air Discharge Temperature: Circuit Short To Battery Or Open Module senses erratic voltages from the air discharge temperature sensor.
    HVAC B10B5:11 Left Panel Air Discharge Temperature: Circuit Short To Ground Module senses erratic voltages from the air discharge temperature sensor.
    HVAC B10B5:15 Left Panel Air Discharge Temperature: Circuit Short To Battery Or Open Module senses erratic voltages from the air discharge temperature sensor.
    HVAC B10B6:11 Left Floor Air Discharge Temperature: Circuit Short To Ground Module senses erratic voltages from the air discharge temperature sensor.
    HVAC B10B6:15 Left Floor Air Discharge Temperature: Circuit Short To Battery Or Open Module senses erratic voltages from the air discharge temperature sensor.

    Possible Sources 

    • Wiring, terminals or connectors
    • Air discharge temperature sensor
    • HVAC control module

  2. NOTE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may cause damage to the connector.

  3. T1 CHECK THE AIR DISCHARGE TEMPERATURE SENSOR OUTPUT VOLTAGE

    • Ignition OFF.

    • Disconnect the suspect air discharge temperature sensor:

      • Left Floor Air Discharge Temperature Sensor C2436
      • Right Floor Air Discharge Temperature Sensor C2437
      • Left Panel Air Discharge Temperature Sensor C2438
      • Right Panel Air Discharge Temperature Sensor C2439

    • Ignition ON.

    • On the HVAC controls, select PANEL mode.

    • For the left floor (footwell) air discharge temperature sensor, measure:
      Positive Lead Measurement / Action Negative Lead
      C2436-1
      GFD572855Courtesy of FORD MOTOR COMPANY
      		 C2436-3

    • For the right floor (footwell) air discharge temperature sensor, measure:
      Positive Lead Measurement / Action Negative Lead
      C2437-1
      GFD572855Courtesy of FORD MOTOR COMPANY
      		 C2437-3

    • For the left panel (register) air discharge temperature sensor, measure:
      Positive Lead Measurement / Action Negative Lead
      C2438-1
      GFD572855Courtesy of FORD MOTOR COMPANY
      		 C2438-3

    • For the right panel (register) air discharge temperature sensor, measure:
      Positive Lead Measurement / Action Negative Lead
      C2439-1
      GFD572855Courtesy of FORD MOTOR COMPANY
      		 C2439-3

    Are the voltages between 4.7 and 5.1 volts? 

    Yes  INSTALL a new air discharge temperature sensor. REFER to the appropriate REMOVAL AND INSTALLATION . CLEAR the Diagnostic Trouble Codes (DTCs). REPEAT the self-test. If the DTC returns, GO to  T6
    No  GO to  T2

  4. T2 CHECK THE AIR DISCHARGE TEMPERATURE SENSOR CIRCUITS FOR A SHORT TO VOLTAGE

    • Ignition OFF.

    • Disconnect HVAC control module C228A and C228B.

    • Ignition ON.

    • For the left floor (footwell) air discharge temperature sensor, measure:
      Positive Lead Measurement / Action Negative Lead
      C2436-1
      GFD572855Courtesy of FORD MOTOR COMPANY
      		 Ground
      C2436-3
      GFD572855Courtesy of FORD MOTOR COMPANY
      		 Ground

    • For the right floor (footwell) air discharge temperature sensor, measure:
      Positive Lead Measurement / Action Negative Lead
      C2437-1
      GFD572855Courtesy of FORD MOTOR COMPANY
      		 Ground
      C2437-3
      GFD572855Courtesy of FORD MOTOR COMPANY
      		 Ground

    • For the left panel (register) air discharge temperature sensor, measure:
      Positive Lead Measurement / Action Negative Lead
      C2438-1
      GFD572855Courtesy of FORD MOTOR COMPANY
      		 Ground
      C2438-3
      GFD572855Courtesy of FORD MOTOR COMPANY
      		 Ground

    • For the right panel (register) air discharge temperature sensor, measure:
      Positive Lead Measurement / Action Negative Lead
      C2439-1
      GFD572855Courtesy of FORD MOTOR COMPANY
      		 Ground
      C2439-3
      GFD572855Courtesy of FORD MOTOR COMPANY
      		 Ground

    Is any voltage present? 

    Yes  REPAIR the circuit.
    No  GO to  T3

  5. T3 CHECK THE AIR DISCHARGE TEMPERATURE SENSOR CIRCUITS FOR A SHORT TO GROUND

    • Ignition OFF.

    • For the left floor (footwell) air discharge temperature sensor, measure:
      Positive Lead Measurement / Action Negative Lead
      C2436-1
      GFD572856Courtesy of FORD MOTOR COMPANY
      		 Ground
      C2436-3
      GFD572856Courtesy of FORD MOTOR COMPANY
      		 Ground

    • For the right floor (footwell) air discharge temperature sensor, measure:
      Positive Lead Measurement / Action Negative Lead
      C2437-1
      GFD572856Courtesy of FORD MOTOR COMPANY
      		 Ground
      C2437-3
      GFD572856Courtesy of FORD MOTOR COMPANY
      		 Ground

    • For the left panel (register) air discharge temperature sensor, measure:
      Positive Lead Measurement / Action Negative Lead
      C2438-1
      GFD572856Courtesy of FORD MOTOR COMPANY
      		 Ground
      C2438-3
      GFD572856Courtesy of FORD MOTOR COMPANY
      		 Ground

    • For the right panel (register) air discharge temperature sensor, measure:
      Positive Lead Measurement / Action Negative Lead
      C2439-1
      GFD572856Courtesy of FORD MOTOR COMPANY
      		 Ground
      C2439-3
      GFD572856Courtesy of FORD MOTOR COMPANY
      		 Ground

    Are the resistances greater than 10, 000 ohms? 

    Yes  GO to  T4
    No  REPAIR the circuit.

  6. T4 CHECK THE AIR DISCHARGE TEMPERATURE SENSOR CIRCUITS FOR AN OPEN

    • For the left floor (footwell) air discharge temperature sensor, measure:
      Positive Lead Measurement / Action Negative Lead
      C2436-1
      GFD572856Courtesy of FORD MOTOR COMPANY
      		 C228A-25
      C2436-3
      GFD572856Courtesy of FORD MOTOR COMPANY
      		 C228A-26

    • For the right floor (footwell) air discharge temperature sensor, measure:
      Positive Lead Measurement / Action Negative Lead
      C2437-1
      GFD572856Courtesy of FORD MOTOR COMPANY
      		 C228A-24
      C2437-3
      GFD572856Courtesy of FORD MOTOR COMPANY
      		 C228A-26

    • For the left panel (register) air discharge temperature sensor, measure:
      Positive Lead Measurement / Action Negative Lead
      C2438-1
      GFD572856Courtesy of FORD MOTOR COMPANY
      		 C228B-7
      Positive Lead Measurement / Action Negative Lead
      C2438-3
      GFD572856Courtesy of FORD MOTOR COMPANY
      		 C228A-26

    • For the right panel (register) air discharge temperature sensor, measure:
      Positive Lead Measurement / Action Negative Lead
      C2439-1
      GFD572856Courtesy of FORD MOTOR COMPANY
      		 C228B-6
      Positive Lead Measurement / Action Negative Lead
      C2439-3
      GFD572856Courtesy of FORD MOTOR COMPANY
      		 C228A-26

    Are the resistances less than 3 ohms? 

    Yes  GO to  T5
    No  REPAIR the circuit.

  7. T5 CHECK AIR DISCHARGE TEMPERATURE SENSOR CIRCUITS FOR A SHORT TO TOGETHER

    • For the left floor (footwell) air discharge temperature sensor, measure:
      Positive Lead Measurement / Action Negative Lead
      C2436-1
      GFD572856Courtesy of FORD MOTOR COMPANY
      		 C2436-3

    • For the right floor (footwell) air discharge temperature sensor, measure:
      Positive Lead Measurement / Action Negative Lead
      C2437-1
      GFD572856Courtesy of FORD MOTOR COMPANY
      		 C2437-3

    • For the left panel (register) air discharge temperature sensor, measure:
      Positive Lead Measurement / Action Negative Lead
      C2438-1
      GFD572856Courtesy of FORD MOTOR COMPANY
      		 C2438-3

    • For the right panel (register) air discharge temperature sensor, measure:
      Positive Lead Measurement / Action Negative Lead
      C2439-1
      GFD572856Courtesy of FORD MOTOR COMPANY
      		 C2439-3

    Are the resistances greater than 10, 000 ohms? 

    Yes  INSTALL a new air discharge temperature sensor. REFER to the appropriate REMOVAL AND INSTALLATION . CLEAR the Diagnostic Trouble Codes (DTCs). REPEAT the self-test. If the DTC returns, GO to  T6
    No  REPAIR the circuit.

  8. T6 CHECK FOR CORRECT HVAC (HEATING, VENTILATION AND AIR CONDITIONING) CONTROL MODULE OPERATION

    • Ignition OFF.

    • Disconnect and inspect all HVAC control module electrical connectors (if not previously disconnected).

    • Repair:

      • corrosion (install new connector or terminal - clean module pins)
      • damaged or bent pins - install new terminals or pins
      • pushed-out pins - install new pins as necessary

    • Connect all HVAC control module electrical connectors. Make sure they seat and latch correctly.

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

    Is the concern still present? 

    Yes  CHECK OASIS for any applicable service articles: TSB, GSB, SSM or FSA. If a service article exists for this concern, DISCONTINUE this test and FOLLOW the service article instructions. If no service articles address this concern, INSTALL a new HVAC control module. REFER to the appropriate REMOVAL AND INSTALLATION .
    No  The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. ADDRESS the root cause of any connector or pin issues.
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