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Pinpoint Test F: DTC B1947 Or B2014

WARNING: This page is about a different car, the 2010 Lincoln MKX and 2010 Ford Edge. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: The evaporator temperature sensor cannot be installed independently of the heater core and evaporator core housing.
  1. F1 CHECK THE SENSOR RESISTANCE 
    • Ignition OFF.
    • Disconnect: Evaporator Temperature Sensor C296.
    • Carry out the Evaporator Temperature Sensor component test. See Component Tests .
    • Is the resistance within the specified values for the temperatures? 
    • Yes:  GO to F2  .
    • No:  INSTALL a new heater core and evaporator core housing. REFER to CLIMATE CONTROL . CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation.
  2. F2 CHECK THE HVAC MODULE SENSOR OUTPUT VOLTAGE 
    • Ignition ON.
    • Press the AUTO button.
    • Measure the voltage between evaporator temperature sensor C296-2, circuit (LG/BK), harness side and C296-1, circuit (BK), harness side.
      Fig 1: Measuring Voltage Between Evaporator Temperature Sensor C296-2, Circuit (LG/BK) And C296-1, Circuit (BK)
      G06505297Courtesy of FORD MOTOR CO.
    • Is the voltage between 4.7 and 5.1 volts? 
    • Yes:  GO to  F7.
    • No: For DTC B2826  , GO to F3  .

      For DTC B2827  , GO to  F5.

  3. F3 CHECK CIRCUIT VH406 (VT/BN)/(LG/BK) FOR AN OPEN 
    • Ignition OFF.
    • Disconnect: HVAC Module - EMTC  C2357A or HVAC Module - DATC  C228A.
    • Measure the resistance between HVAC module - EMTC  C2357A-6 or HVAC module - DATC  C228A-6, circuit VH406 (VT/BN), harness side and evaporator temperature sensor C296-2, circuit (LG/BK), harness side.
      Fig 2: Measuring Resistance Between HVAC Module - EMTC C2357A-6 And Evaporator Temperature Sensor C296-2, Circuit (LG/BK)
      G06505298Courtesy of FORD MOTOR CO.
    • Is the resistance less than 5 ohms? 
    • Yes:  GO to F4  .
    • No:  REPAIR circuit VH406 (VT/BN)/(LG/BK) for an open. CLEAR the DTCs.

      REPEAT the self-test. TEST the system for normal operation.

  4. F4 CHECK CIRCUIT RH111 (GY/BU)/(BK) FOR AN OPEN 
    • Measure the resistance between HVAC module - EMTC  C2357A-10 or HVAC module - DATC  C228A-10, circuit RH111 (GY/BU), harness side and evaporator temperature sensor C296-1, circuit (BK), harness side.
      Fig 3: Measuring Resistance Between HVAC Module - EMTC C2357A-10 Circuit And Evaporator Temperature Sensor C296-1, Circuit (BK)
      G06505299Courtesy of FORD MOTOR CO.
    • Is the resistance less than 5 ohms? 
    • Yes:  GO to  F7.
    • No:  REPAIR circuit RH111 (GY/BU)/(BK) for an open. CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation.
  5. F5 CHECK CIRCUIT VH406 (VT/BN)/(LG/BK) FOR A SHORT TO CIRCUIT RH111 (GY/BU)/(BK) 
    • Ignition OFF.
    • Disconnect: HVAC Module - EMTC  C2357A or HVAC Module - DATC  C228A.
    • Measure the resistance between evaporator temperature sensor C296-2, circuit (LG/BK), harness side and C296-1, circuit (BK), harness side.
      Fig 4: Measuring Resistance Between Evaporator Temperature Sensor C296-2, Circuit (LG/BK) And C296-1, Circuit (BK)
      G06505300Courtesy of FORD MOTOR CO.
    • Is the resistance greater than 10,000 ohms? 
    • Yes:  GO to F6  .
    • No:  REPAIR circuit VH406 (VT/BN)/(LG/BK) for a short to circuit RH111 (GY/BU)/(BK). CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation.
  6. F6 CHECK CIRCUIT VH406 (VT/BN)/(LG/BK) FOR A SHORT TO GROUND 
    • Measure the resistance between HVAC module - EMTC  C2357A-6 or HVAC module - DATC  C228A-6, circuit VH406 (VT/BN), harness side and ground.
      Fig 5: Measuring Resistance Between HVAC Module Circuit VH406 (VT/BN)/(LG/BK) And Ground
      G06064553Courtesy of FORD MOTOR CO.
    • Is the resistance greater than 10,000 ohms? 
    • Yes:  GO to F7  .
    • No:  REPAIR circuit VH406 (VT/BN)/(LG/BK) for a short to ground. CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation.
  7. F7 CHECK THE HVAC MODULE CONNECTION 
    • Inspect the HVAC module connectors for:
      • corrosion.
      • pushed-out terminals.
      • damaged terminals.
    • Connect and correctly seat all the HVAC module connectors.
    • Clear the DTCs.
    • Operate the system and verify the concern is still present.
    • Is the concern still present? 
    • Yes:  INSTALL a new HVAC module. REFER to CLIMATE CONTROL . 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. CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation.
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