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Home >> Mercury >> 2010 >> Milan Base, Standard >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 8 (HVAC - Climate Control System - General Information And Diagnostics (Hybrid)) >> Diagnosis And Testing >> Climate Control System >> Pinpoint Tests >> Pinpoint Test B: DTC B1A61:11 and 15 >> Pinpoint Test B: DTC B1A61:11 And 15

Pinpoint Test B: DTC B1A61:11 And 15

WARNING: This page is about a different variant/trim than selected.
  1. B1 CHECK THE SENSOR RESISTANCE 
    • Ignition OFF.
    • Disconnect: In-Vehicle Temperature/Humidity Sensor C2247.
    • Measure the resistance between the in-vehicle temperature/humidity sensor C2247-2, component side and C2247-5, component side and compare to the table below.
      TEMPERATURE RESISTANCE REFERENCE TABLE

      Ambient Temperature Resistance
      -40°C (-40°F) 862,600-942,000 ohms
      -15°C (5°F) 202,400-214,700 ohms
      0°C (32°F) 93,510-97,640 ohms
      15°C (59°F) 46,060-47,430 ohms
      25°C (77°F) 29,700-30,300 ohms
      35°C (95°F) 19,400-20,000 ohms
      60°C (140°F) 7,414-7,774 ohms
      85°C (185°F) 3,182-3,393 ohms
      Fig 1: Measuring Resistance Between In-Vehicle Temperature/Humidity Sensor C2247-2 & C2247-5, Component Side
      G06262690Courtesy of FORD MOTOR CO.
    • Is the resistance within the specified values for the temperatures? 
    • Yes:  GO to  B2.
    • No:  INSTALL a new in-vehicle temperature/humidity sensor. CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation.
  2. B2 CHECK THE SENSOR OUTPUT VOLTAGE 
    • Ignition ON.
    • Measure the voltage between in-vehicle temperature/humidity sensor C2247-2, circuit VH414 (GN/BU), harness side and C2247-5, circuit RH111 (GY/BU), harness side.
      Fig 2: Checking Sensor Output Voltage
      G06262691Courtesy of FORD MOTOR CO.
    • Is the voltage between 4.7 and 5.1 volts? 
    • Yes:  INSTALL a new in-vehicle temperature/humidity sensor. CLEAR the DTCs. REPEAT the self-test. If code returns, GO to  B8.
    • No: For DTC B1A68:15  , GO to  B3.

      For DTC B1A68:11  , GO to  B6.

  3. B3 CHECK CIRCUIT VH414 (GN/BU) FOR A SHORT TO VOLTAGE 
    • Ignition OFF.
    • Disconnect: HVAC Module - Dual Automatic Temperature Control (DATC) C2356a.
    • Disconnect: HVAC Module - DATC  C2356b.
    • Ignition ON.
    • Measure the voltage between ground and HVAC module - DATC  C2356b-21, circuit VH414 (GN/BU), harness side.
      Fig 3: Measuring Voltage Between Ground & HVAC Module DATC C2356B-21, Circuit VH414 (GN/BU), Harness Side
      G06075210Courtesy of FORD MOTOR CO.
    • Is any voltage present? 
    • Yes:  REPAIR circuit VH414 (GN/BU) for a short to voltage. CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation.
    • No:  GO to  B4.
  4. B4 CHECK CIRCUIT VH414 (GN/BU) FOR AN OPEN 
    • Ignition OFF.
    • Measure the resistance between HVAC module - DATC  C2356b-21, circuit VH414 (GN/BU), harness side and in-vehicle temperature/humidity sensor C2247-2, circuit VH414 (GN/BU), harness side.
      Fig 4: Checking Circuit VH414 (GN/BU) For Open
      G06262693Courtesy of FORD MOTOR CO.
    • Is the resistance less than 5 ohms? 
    • Yes:  GO to  B5.
    • No:  REPAIR circuit VH414 (GN/BU) for an open. CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation.
  5. B5 CHECK CIRCUIT RH111 (GY/BU) FOR AN OPEN 
    • Measure the resistance between HVAC module C2356a-10, circuit RH111 (GY/BU), harness side and in-vehicle temperature/humidity sensor C2247-5, circuit RH111 (GY/BU), harness side.
      Fig 5: Checking Circuit RH111 (GY/BU) For Open
      G06262694Courtesy of FORD MOTOR CO.
    • Is the resistance less than 5 ohms? 
    • Yes:  GO to  B8.
    • No:  REPAIR circuit RH111 (GY/BU) for an open. CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation.
  6. B6 CHECK CIRCUIT VH414 (GN/BU) FOR A SHORT TO CIRCUIT RH111 (GY/BU) 
    • Ignition OFF.
    • Disconnect: HVAC Module - DATC  C2356b.
    • Measure the resistance between in-vehicle temperature/humidity sensor C2247-2, circuit VH414 (GN/BU), harness side and C2247-5, circuit RH111 (GY/BU), harness side.
      Fig 6: Checking Circuit VH414 (GN/BU) For Short To Circuit RH111 (GY/BU)
      G06262695Courtesy of FORD MOTOR CO.
    • Is the resistance greater than 10,000 ohms? 
    • Yes:  GO to  B7.
    • No:  REPAIR circuit VH414 (GN/BU) for a short to circuit RH111 (GY/BU). CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation.
  7. B7 CHECK CIRCUIT VH414 (GN/BU) FOR A SHORT TO GROUND 
    • Measure the resistance between HVAC module - DATC  C2356b-21, circuit VH414 (GN/BU), harness side and ground.
      Fig 7: Measuring Resistance Between HVAC Module DATC C2356B-21, Circuit VH414 (GN/BU), Harness Side & Ground
      G06262696Courtesy of FORD MOTOR CO.
    • Is the resistance greater than 10,000 ohms? 
    • Yes:  GO to  B8.
    • No:  REPAIR circuit VH414 (GN/BU) for a short to ground. CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation.
  8. B8 CHECK THE MODULE CONNECTION 
    • Inspect the 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 REMOVAL AND INSTALLATION . 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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