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Home >> Mercury >> 2010 >> Milan Base, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 1200 (HVAC - Climate Control System - General Information And Diagnostics - (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 Mariner and 2010 Ford Escape. 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 C286-4, circuit GD114 (BK/BU), 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: Measuring Voltage Between Sunload Sensor C286-4 And Ground
        G06064541Courtesy 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 CIRCUITS VH416 (VT/GY) AND VH417 (YE/OG) FOR A SHORT TO VOLTAGE 
    • Ignition OFF.
    • Disconnect: HVAC Module C2356A.
    • Disconnect: HVAC Module 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: Measuring Voltage Between Sunload Sensor C286-4 And Ground
        G06064541Courtesy 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 GD114 (BK/BU) FOR AN OPEN 
    • Ignition OFF.
    • Measure the resistance between ground and sunload sensor C286-4, circuit GD114 (BK/BU), harness side.
      Fig 3: Measuring Resistance Between Ground And Sunload Sensor C286-4
      G06098558Courtesy of FORD MOTOR CO.
    • Is the resistance less than 5 ohms? 
    • Yes:  GO to F4  .
    • No:  REPAIR circuit GD114 (BK/BU) 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 C2356B-6, circuit VH416 (VT/GY), harness side and sunload sensor C286-3, circuit VH416 (VT/GY), harness side.
      Fig 4: Measuring Resistance Between HVAC Module C2356B-6 And Sunload Sensor C286-3
      G06064543Courtesy of FORD MOTOR CO.
    • Measure the resistance between HVAC module 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 C2356B-3 And Sunload Sensor C286-1
      G06064544Courtesy of FORD MOTOR CO.
    • Is the resistance less than 5 ohms? 
    • Yes:  GO to  F6.
    • No:  REPAIR circuit VH416 (VT/GY) or 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 VH416 (VT/GY) FOR A SHORT TO GROUND 
    • Ignition OFF.
    • Disconnect: HVAC Module C2356A.
    • Disconnect: HVAC Module 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: Measuring Resistance Between Ground And Sunload Sensor 3286-3
        G06098562Courtesy of FORD MOTOR CO.
    • Is the resistance greater than 10,000 ohms? 
    • Yes:  GO to F6  .
    • No:  REPAIR circuit 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 HEATING VENTILATION AIR CONDITIONING (HVAC) MODULE . 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.
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