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Home >> Lincoln >> 2012 >> MKZ Hybrid >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 12 (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 variant/trim than selected.
  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
        G06064540Courtesy 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) AND VH417 (YE/OG) For Short To Voltage
        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 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 And Sunload Sensor C286-4, Circuit GD116 (BK/VT)
      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: Measuring Resistance Between HVAC Module - DATC C2356B-6 And Sunload Sensor C286-3, Circuit VH416 (VT/GY)
      G06064543Courtesy 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 C2356B-3 And Sunload Sensor C286-1, Circuit VH417 (YE/OG)
      G06064544Courtesy 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
        G06098562Courtesy 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 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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