LEMON Manuals: Even more car manuals for everyone
Home >> Ford >> 2000 >> Taurus LX, 3.0 2, AX4N >> Repair and Diagnosis >> External Pages >> Different car >> Section 1678 (Climate Control System - General Information & Diagnostics (Except Hybrid)) >> Diagnosis And Testing >> Principles of Operation >> Pinpoint Tests >> Pinpoint Test C: DTCs C1B14:11 and 12 >> PINPOINT TEST C: DTCs C1B14:11 AND 12

PINPOINT TEST C: DTCs C1B14:11 AND 12

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 RESISTANCE 
    • Check for HVAC DTCs.
    • Is DTC C1B14:11 present? 
    • Yes  : GO to C2.
    • No  : GO to  C4.
  2. C2 CHECK CIRCUIT LH111 (BN/WH) FOR A SHORT TO GROUND 
    • Ignition OFF.
    • Disconnect: HVAC Module - Electronic Manual Temperature Control (EMTC) C2357a.
    • Disconnect: HVAC Module - Dual Automatic Temperature Control (DATC) C2356a.
    • Disconnect: HVAC Module - DATC C2356b.
    • Measure the resistance between ground and HVAC module - EMTC C2357a-11 or HVAC module - DATC C2356a-11, circuit LH111 (BN/WH), harness side.
      Fig 1: Checking Circuit LH111 (BN/WH) For Short To Ground
      G07787112Courtesy of FORD MOTOR CO.
    • Is the resistance greater than 10,000 ohms? 
    • Yes  : GO to C3.
    • No  : REPAIR circuit LH111 (BN/WH) for a short to ground. CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation.
  3. C3 CHECK CIRCUITS LH111 (BN/WH) AND RH111 (GY/BU) FOR A SHORT TOGETHER 
    • Measure the resistance between HVAC module - EMTC C2357a-11 or HVAC module - DATC C2356a-11, circuit LH111 (BN/WH), harness side and HVAC module - EMTC C2357a-10 or HVAC module C2356a-10, circuit RH111 (GY/BU), harness side.
      Fig 2: Checking Circuit LH111 (BN/WH) And RH111 (GY/BU) For Short To Ground
      G07787113Courtesy of FORD MOTOR CO.
    • Is the resistance greater than 200 ohms? 
    • Yes  : GO to  C5.
    • No  : REPAIR circuits LH111 (BN/WH) and RH111 (GY/BU) for a short together. CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation.
  4. C4 CHECK CIRCUIT LH111 (BN/WH) FOR A SHORT TO VOLTAGE 
    • Ignition OFF.
    • Disconnect: HVAC Module - EMTC C2357a.
    • Disconnect: HVAC Module - DATC C2356a.
    • Disconnect: HVAC Module - DATC C2356b.
    • Ignition ON.
    • Measure the voltage between ground and HVAC module - EMTC C2357a-11 or HVAC module - DATC C2356a-11, circuit LH111 (BN/WH), harness side.
      Fig 3: Checking Circuit LH111 (BN/WH) For Short To Voltage
      G07787114Courtesy of FORD MOTOR CO.
    • Is any voltage present? 
    • Yes  : REPAIR circuit LH111 (BN/WH) for a short to voltage. CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation.
    • No  : GO to C5.
  5. C5 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 -- FUSION, MILAN & MKZ article. 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.
scientia non olet · About LEMON Manuals