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Home >> Ford >> 2006 >> Focus ZX5 SE, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 1194 (HVAC - Climate Control System - General Information And Diagnostics (Except Hybrid)) >> Diagnosis And Testing >> Climate Control System >> Pinpoint Tests >> Pinpoint Test E: DTCs B1A68:11 and 15 >> PINPOINT TEST E: DTCs B1A68:11 AND 15

PINPOINT TEST E: DTCs B1A68:11 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. E1 CHECK THE SENSOR RESISTANCE 
    • Ignition OFF.
    • Disconnect: Ambient Air Temperature Sensor C132.
    • Measure the resistance between the ambient air temperature sensor C132 terminals and compare to the table below.
      TEMPERATURE RESISTANCE REFERENCE TABLE

      Ambient Temperature Resistance
      -40°C (-40°F) 832,519-1,017,523 ohms
      -15°C (5°F) 199,325-220,307 ohms
      0°C (32°F) 91,058-100,644 ohms
      15°C (59°F) 44,435-49,113 ohms
      25°C (77°F) 28,500-31,500 ohms
      35°C (95°F) 18,730-20,701 ohms
      60°C (140°F) 7,171-7,925 ohms
      85°C (185°F) 3,110-3,438 ohms
      Fig 1: Measuring Resistance Between Ambient Air Temperature Sensor C132 Terminals
      G06064533Courtesy of FORD MOTOR CO.
    • Is the resistance within the specified values for the temperatures? 
    • Yes:  GO to  E2.
    • No:  INSTALL a new ambient air temperature sensor. CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation.
  2. E2 CHECK THE SENSOR OUTPUT VOLTAGE 
    • Ignition ON.
    • Measure the voltage between ambient air temperature sensor C132-1, circuit VH407 (YE/GN), harness side and C132-2, circuit RH111 (GY/BU), harness side.
      Fig 2: Checking DATC Sensor Output Voltage
      G06064534Courtesy of FORD MOTOR CO.
    • Is the voltage between 4.7 and 5.1 volts? 
    • Yes  : INSTALL a new ambient air temperature sensor. CLEAR the DTCs. REPEAT the self-test. If code returns, GO to  E8.
    • No: For DTC B1A61:15  , GO to  E3.

      For DTC B1A61:11  , GO to  E6.

  3. E3 CHECK CIRCUIT VH407 (YE/GN) FOR A SHORT TO VOLTAGE 
    • Ignition OFF.
    • Disconnect: HVAC Module - Electronic Manual Temperature Control (EMTC) C2357a.
    • Disconnect: HVAC Module - Dual Automatic Temperature Control (DATC) C2356a.
    • Ignition ON.
    • Measure the voltage between HVAC module - DATC  C2356a-2, circuit VH407 (YE/GN), harness side and ground.
      Fig 3: Measuring Voltage Between HVAC Module DATC C2356A-2, Circuit VH407 (YE/GN), Harness Side & Ground
      G06262537Courtesy of FORD MOTOR CO.
    • Is any voltage present? 
    • Yes:  REPAIR circuit VH407 (YE/GN) for a short to ground. CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation.
    • No:  GO to  E4.
  4. E4 CHECK CIRCUIT VH407 (YE/GN) FOR AN OPEN 
    • Ignition OFF.
    • Measure the resistance between HVAC module - DATC  C2356a-2, circuit VH407 (YE/GN), harness side and ambient air temperature sensor C132-1, circuit VH407 (YE/GN), harness side.
      Fig 4: Checking Circuit VH407 (YE/GN) For Open
      G06262538Courtesy of FORD MOTOR CO.
    • Is the resistance less than 5 ohms? 
    • Yes:  GO to  E5.
    • No:  REPAIR circuit VH407 (YE/GN) for an open. CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation.
  5. E5 CHECK CIRCUIT RH111 (GY/BU) FOR AN OPEN 
    • Measure the resistance between HVAC module - DATC  C2356a-10, circuit RH111 (GY/BU), harness side and ambient air temperature sensor C132-2, circuit RH111 (GY/BU), harness side.
      Fig 5: Checking Circuit RH111 (GY/BU) For Open
      G06262539Courtesy of FORD MOTOR CO.
    • Is the resistance less than 5 ohms? 
    • Yes:  GO to  E8.
    • No:  REPAIR circuit RH111 (GY/BU) for an open. CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation.
  6. E6 CHECK CIRCUIT VH407 (YE/GN) FOR A SHORT TO CIRCUIT RH111 (GY/BU) 
    • Ignition OFF.
    • Disconnect: HVAC Module - EMTC  C2357a.
    • Disconnect: HVAC Module - DATC  C2356a.
    • Measure the resistance between ambient air temperature sensor C132-1, circuit VH407 (YE/GN), harness side and C132-2, circuit RH111 (GY/BU), harness side.
      Fig 6: Measuring Resistance Between Ambient Temperature Sensor C132-1 & C132-2, Circuit RH111 (GY/BU), Harness Side
      G06064538Courtesy of FORD MOTOR CO.
    • Is the resistance greater than 10,000 ohms? 
    • Yes:  GO to  E7.
    • No:  REPAIR circuit VH407 (YE/GN) for a short to circuit RH111 (GY/BU). CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation.
  7. E7 CHECK CIRCUIT VH407 (YE/GN) FOR A SHORT TO GROUND 
    • Measure the resistance between HVAC module - DATC  C2356a-2, circuit VH407 (YE/GN), harness side and ground.
      Fig 7: Measuring Resistance Between HVAC Module DATC C2356A-2, Circuit VH407 (YE/GN), Harness Side & Ground
      G06262541Courtesy of FORD MOTOR CO.
    • Is the resistance greater than 10,000 ohms? 
    • Yes:  GO to  E8.
    • No:  REPAIR circuit VH407 (YE/GN) for a short to ground. CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation.
  8. E8 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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