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Pinpoint Test C: DTC B1A69:11 Or 15: Overview

WARNING: This page is about a different car, the 2011 Mercury Milan, 2011 Lincoln MKZ, and 2011 Ford Fusion. However, it is still accessible from the selected car via links, so may be relevant.
  1. C1 CHECK THE SENSOR OUTPUT VOLTAGE 
    • Ignition OFF.
    • Disconnect: In-Vehicle Temperature/Humidity Sensor C2247.
    • Ignition ON.
    • Measure the voltage between in-vehicle temperature/humidity sensor C2247-4, circuit VH413 (WH/BU), harness side and C2247-5, circuit RH111 (GY/BU), harness side.
      Fig 1: Measuring Voltage Between In-Vehicle Temperature/Humidity Sensor C2247-4, Circuit VH413 (WH/BU) And C2247-5, Circuit RH111 (GY/BU)
      G06262697Courtesy of FORD MOTOR CO.
    • Is the voltage between 4.7 and 5.1 volts? 
    1. Yes  : INSTALL a new in-vehicle temperature/humidity sensor. CLEAR the DTCs. REPEAT the self-test. If code returns, GO to C7.
    2. No  : For DTC B1A69:15  , GO to C2.

      For DTC B1A69:11  , GO to  C5.

  2. C2 CHECK CIRCUIT VH413 (WH/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-20, circuit VH413 (WH/BU), harness side.
      Fig 2: Measuring Voltage Between Ground And HVAC Module - DATC C2356b-20, Circuit VH413 (WH/BU)
      G06262698Courtesy of FORD MOTOR CO.
    • Is any voltage present? 
    1. Yes  : REPAIR circuit VH413 (WH/BU) for a short to voltage. CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation.
    2. No  : GO to C3.
  3. C3 CHECK CIRCUIT VH413 (WH/BU) FOR AN OPEN 
    • Ignition OFF.
    • Measure the resistance between HVAC module - DATC C2356b-20, circuit VH413 (WH/BU), harness side and in-vehicle temperature/humidity sensor C2247-4, circuit VH413 (WH/BU), harness side.
      Fig 3: Checking Circuit VH413 (WH/BU) For Open
      G06262699Courtesy of FORD MOTOR CO.
    • Is the resistance less than 5 ohms? 
    1. Yes  : GO to C4.
    2. No  : REPAIR circuit VH413 (WH/BU) for an open. CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation.
  4. C4 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/humidity sensor C2247-5, circuit RH111 (GY/BU), harness side.
      Fig 4: Measuring Resistance Between HVAC Module C2356a-10 And In-Vehicle Temperature/Humidity Sensor C2247-5, Circuit RH111 (GY/BU)
      G06262694Courtesy of FORD MOTOR CO.
    • Is the resistance less than 5 ohms? 
    1. Yes  : GO to  C7.
    2. No  : REPAIR circuit RH111 (GY/BU) for an open. CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation.
  5. C5 CHECK CIRCUIT VH413 (WH/BU) FOR A SHORT TO CIRCUIT RH111 (GY/BU) 
    • Ignition OFF.
    • Disconnect: HVAC Module - DATC C2356b.
    • Measure the resistance between in-vehicle temperature/humidity sensor C2247-4, circuit VH413 (WH/BU), harness side and C2247-5, circuit RH111 (GY/BU), harness side.
      Fig 5: Measuring Resistance Between In-Vehicle Temperature/Humidity Sensor C2247-4, Circuit VH413 (WH/BU) And C2247-5, Circuit RH111 (GY/BU)
      G07787290Courtesy of FORD MOTOR CO.
    • Is the resistance greater than 10,000 ohms? 
    1. Yes  : GO to C6.
    2. No  : REPAIR circuit VH413 (WH/BU) for a short to circuit RH111 (GY/BU). CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation.
  6. C6 CHECK CIRCUIT VH413 (WH/BU) FOR A SHORT TO GROUND 
    • Measure the resistance between HVAC module - DATC C2356b-20, circuit VH413 (WH/BU), harness side and ground.
      Fig 6: Measuring Resistance Between HVAC Module - DATC C2356B-20, Circuit VH413 (WH/BU) And Ground
      G06262702Courtesy of FORD MOTOR CO.
    • Is the resistance greater than 10,000 ohms? 
    1. Yes  : GO to C7.
    2. No  : REPAIR circuit VH413 (WH/BU) for a short to ground. CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation.
  7. C7 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? 
    1. Yes  : INSTALL a new HVAC module. REFER to CLIMATE CONTROL -- FUSION, MILAN & MKZ article. TEST the system for normal operation.
    2. 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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