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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 D: DTCs B1A61:11 and 15 >> PINPOINT TEST D: DTCs B1A61:11 AND 15

PINPOINT TEST D: DTCs B1A61:11 AND 15

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  1. D1 CHECK THE SENSOR RESISTANCE 
    • Ignition OFF.
    • Disconnect: In-Vehicle Temperature Sensor C233.
    • Measure the resistance between the in-vehicle temperature sensor C233 terminals and compare to the table below.
      Ambient Temperature Resistance
      -40°C (-40°F) 869, 073-1, 061, 986 ohms
      -15°C (5°F) 196, 465-231, 213 ohms
      0°C (32°F) 89, 982-102, 514 ohms
      15°C (59°F) 44, 261-49, 503 ohms
      25°C (77°F) 28, 500-31, 500 ohms
      35°C (95°F) 18, 563-20, 751 ohms
      60°C (140°F) 6, 971-8, 001 ohms
      85°C (185°F) 2, 959-3, 474 ohms
      Fig 1: Checking Sensor Resistance
      G06756988Courtesy of FORD MOTOR CO.
    • Is the resistance within the specified values for the temperatures? 
    • Yes:  GO to D2.
    • No:  INSTALL a new in-vehicle temperature sensor. CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation.
  2. D2 CHECK THE SENSOR OUTPUT VOLTAGE 
    • Ignition ON.
    • Measure the voltage between in-vehicle temperature sensor C233-1, circuit VH414 (GN/BU), harness side and C233-3, circuit RH111 (GY/BU), harness side.
      Fig 2: Checking Sensor Output Voltage
      G06257720Courtesy of FORD MOTOR CO.
    • Is the voltage between 4.7 and 5.1 volts? 
    • Yes:  INSTALL a new in-vehicle sensor. CLEAR the DTCs. REPEAT the self-test. If code returns, GO to  D8.
    • No: For DTC B1A68:15  , GO to D3.

      For DTC B1A68:11  , GO to  D6.

  3. D3 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 And HVAC Module - DATC C2356B-21, Circuit VH414 (GN/BU)
      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 D4.
  4. D4 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 sensor C233-1, circuit VH414 (GN/BU), harness side.
      Fig 4: Checking Circuit VH414 (GN/BU) For Open
      G06262531Courtesy of FORD MOTOR CO.
    • Is the resistance less than 5 ohms? 
    • Yes:  GO to D5.
    • No:  REPAIR circuit VH414 (GN/BU) for an open. CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation.
  5. D5 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 sensor C233-3, circuit RH111 (GY/BU), harness side.
      Fig 5: Checking Circuit RH111 (GY/BU) For Open
      G07787119Courtesy of FORD MOTOR CO.
    • Is the resistance less than 5 ohms? 
    • Yes:  GO to  D8.
    • No:  REPAIR circuit RH111 (GY/BU) for an open. CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation.
  6. D6 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 sensor C233-1, circuit VH414 (GN/BU), harness side and C233-3, circuit RH111 (GY/BU), harness side.
      Fig 6: Checking Circuit VH414 (GN/BU) For Short To Circuit RH111 (GY/BU)
      G06756993Courtesy of FORD MOTOR CO.
    • Is the resistance greater than 10, 000 ohms? 
    • Yes:  GO to D7.
    • 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. D7 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 And Ground
      G06075214Courtesy of FORD MOTOR CO.
    • Is the resistance greater than 10, 000 ohms? 
    • Yes:  GO to D8.
    • 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. D8 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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