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Home >> Mercury >> 2008 >> Milan Base, 3.0 1, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1467 (HVAC - Climate Control System - General Information And Diagnostics (Except Hybrid)) >> Diagnosis And Testing >> Climate Control System >> Pinpoint Tests >> Pinpoint Test F: DTCs B1A63:11 and 15 or DTCs B1A64:11 and 15 >> PINPOINT TEST F: DTCs B1A63:11 AND 15 OR DTCs B1A64:11 AND 15

PINPOINT TEST F: DTCs B1A63:11 AND 15 OR DTCs B1A64:11 AND 15

WARNING: This page is about a different car, the 2010 Mercury Milan, 2010 Lincoln MKZ, and 2010 Ford Fusion. However, it is still accessible from the selected car via links, so may be relevant.
  1. F1 CHECK THE SUNLOAD SENSOR REFERENCE VOLTAGE 
    • Ignition OFF.
    • Disconnect: Sunload Sensor C286.
    • Ignition ON.
    • Press the AUTO button.
    • Measure the voltage between sunload sensor C266-4, circuit GD116 (BK/VT), harness side and sunload sensor:
      • For DTC B1A63  , C286-1, circuit VH417 (YE/OG), harness side.
      • For DTC B1A64  , C286-3, circuit VH416 (VT/GY), harness side.
        Fig 1: Checking Sunload Sensor Reference Voltage
        G06262542Courtesy of FORD MOTOR CO.
    • Is the voltage between 4.7 and 5.1 volts? 
    • Yes:  INSTALL a new sunload sensor. CLEAR the DTCs. REPEAT the self-test. If the code returns, GO to  F6.
    • No:  If diagnosing DTC B1A63:15  or DTC B1A64:15  , GO to  F2.

      If diagnosing DTC B1A63:11  or DTC B1A64:11  , GO to  F5.

  2. F2 CHECK CIRCUIT VH416 (VT/GY) AND VH417 (YE/OG) 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 sunload sensor:
      • For DTC B1A64:11  , C286-3, circuit VH416 (VT/GY), harness side.
      • For DTC B1A63:11  , C286-1, circuit VH417 (YE/OG), harness side.
        Fig 2: Checking Circuit VH416 (VT/GY) & VH417 (YE/OG) For Short To Voltage
        G06172047Courtesy of FORD MOTOR CO.
    • Is any voltage present? 
    • Yes:  REPAIR circuit VH416 (VT/GY) or VH417 (YE/OG) for a short to voltage. CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation.
    • No:  GO to  F3.
  3. F3 CHECK CIRCUIT GD116 (BK/VT) FOR AN OPEN 
    • Ignition OFF.
    • Measure the resistance between ground and sunload sensor C286-4, circuit GD116 (BK/VT), harness side.
      Fig 3: Measuring Resistance Between Ground & Sunload Sensor C286-4, Circuit GD116 (BK/VT), Harness Side
      G06098558Courtesy of FORD MOTOR CO.
    • Is the resistance less than 5 ohms? 
    • Yes:  GO to  F4.
    • No:  REPAIR circuit GD116 (BK/VT) for an open. CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation.
  4. F4 CHECK CIRCUITS VH417 (YE/OG) AND VH416 (VT/GY) FOR AN OPEN 
    • Measure the resistance between HVAC module - DATC  C2356b-6, circuit VH416 (VT/GY), harness side and sunload sensor C286-3, circuit VH416 (VT/GY), harness side.
      Fig 4: Checking Circuits VH417 (YE/OG) & VH416 (VT/GY) For Open
      G06172051Courtesy of FORD MOTOR CO.
    • Measure the resistance between HVAC module - DATC  C2356b-3, circuit VH417 (YE/OG), harness side and sunload sensor C286-1, circuit VH417 (YE/OG), harness side.
      Fig 5: Measuring Resistance Between HVAC Module - DATC C228B-3 & Sunload Sensor C286-1
      G06172053Courtesy of FORD MOTOR CO.
    • Is the resistance less than 5 ohms? 
    • Yes:  GO to  F6.
    • No:  REPAIR circuit VH416 (VT/GY) or circuit VH417 (YE/OG) for an open. CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation.
  5. F5 CHECK CIRCUIT VH417 (YE/OG) OR CIRCUIT VH416 (VT/GY) FOR A SHORT TO GROUND 
    • Ignition OFF.
    • Disconnect: HVAC Module - DATC  C2356a.
    • Disconnect: HVAC Module - DATC  C2356b.
    • Measure the resistance between ground and sunload sensor:
      • For DTC B1A64:11  , C286-3, circuit VH416 (VT/GY), harness side.
      • For DTC B1A63:11  , C286-1, circuit VH417 (YE/OG), harness side.
        Fig 6: Checking Circuit VH417 (YE/OG) Or Circuit VH416 (VT/GY) For Short To Ground
        G06262547Courtesy of FORD MOTOR CO.
    • Is the resistance greater than 10,000 ohms? 
    • Yes:  GO to  F6.
    • No:  REPAIR circuits VH417 (YE/OG) or VH416 (VT/GY) for a short to circuit RH111 (GY/BU). CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation.
  6. F6 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 (Fusion, Milan) and REMOVAL AND INSTALLATION (MKZ) . 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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