Climate Control System - General Information And Diagnostics
- Specifications
- Description And Operation
- Diagnostic Tests
- Climate Control System
- Notes
- Inspection and Verification
- Electronic Automatic Temperature Control (EATC) Module - Diagnostic Methods
- Diagnostic Trouble Code Chart
- Symptom Chart
- Pinpoint Tests
- Pinpoint Test A: DTC B1251 or DTC B1253 - In-Vehicle Temperature Sensor Open Circuit or Short to Ground
- Pinpoint Test B: DTC B1255 or DTC B1257 - Ambient Temperature Sensor Open Circuit or Short to Ground
- Pinpoint Test C: DTC B2796, DTC B2795, DTC B2426 or DTC B2427 - Solar Radiation Sensor Open Circuit or Short to Ground
- Pinpoint Test D: DTC B2784 or DTC B2783 - A/C Humidity Sensor Open Circuit or Short to Ground
- Pinpoint Test E: DTC B2826 or DTC B2827 - Evaporator Temperature Sensor Open Circuit or Short to Ground
- Pinpoint Test F: DTC B2268 or DTC B2269 - The Steering Wheel Control Switches are Inoperative/Do Not Operate Correctly
- Pinpoint Test G: The Air Inlet Door is Inoperative
- Pinpoint Test H: Incorrect/Erratic Direction of Airflow From Outlets
- Pinpoint Test I: The EATC System is Inoperative, Intermittent or Incorrect Operation
- Pinpoint Test J: Insufficient, Erratic or No Heat
- Pinpoint Test K: The Air Conditioning (A/C) is Inoperative/Does Not Operate Correctly
- Pinpoint Test L: The Air Conditioning (A/C) is Always On
- Pinpoint Test M: Temperature Control is Inoperative/Does Not Operate Correctly
- Pinpoint Test N: The Blower Motor is Inoperative - EMTC
- Pinpoint Test O: The Blower Motor Does Not Operate Correctly - EMTC
- Pinpoint Test P: The Blower Motor is Inoperative - EATC
- Pinpoint Test Q: The Blower Motor Does Not Operate Correctly - EATC
- Pinpoint Test R: The Auxiliary Blower Motor is Inoperative
- Pinpoint Test S: The Auxiliary Blower Motor Does Not Operate Correctly
- Pinpoint Test T: The Auxiliary Temperature Control is Inoperative/Does Not Operate Correctly Using the Front/Rear Auxiliary Climate Controls
- Pinpoint Test U: The Auxiliary Panel/Floor Control is Inoperative/Does Not Operate Correctly Using the Front/Rear Auxiliary Climate Controls
- Pinpoint Test V: The Auxiliary Temperature, Panel/Floor and Blower Motor Controls are Inoperative/Do Not Operate Correctly Using the Front/Rear Auxiliary Climate Controls
- Pinpoint Test W: DTC B1676 - Battery Voltage Out of Range
- Component Tests
- Resistor - Blower Motor
- Resistor - Auxiliary Blower Motor (Expedition/Navigator)
- Resistor - Auxiliary Blower Motor (Expedition EL/Navigator L)
- Temperature Sensor - In-Vehicle, Expedition
- Temperature Sensor - In-Vehicle, Navigator
- Temperature Sensor - Ambient
- Temperature Sensor - Evaporator Discharge
- Heater Core
- Heater Core - Plugged
- Heater Core - Pressure Test
- Heater Core - Bench Test
- Evaporator/Condenser Core - On-Vehicle Leak Test
- A/C Compressor - External Leak Test
- Climate Control System
- General Procedures
- Spring Lock Coupling
- Heater Hose Coupling
- Air Conditioning (A/C) Clutch Air Gap Adjustment
- Electronic Leak Detection
- Fluorescent Dye Leak Detection
- Air Conditioning (A/C) System Flushing
- Air Conditioning (A/C) System Recovery, Evacuation and Charging
- Refrigerant System Filtering Following Air Conditioning (A/C) Compressor Installation
- Refrigerant Oil Adding
- Refrigerant Identification Testing
- Air Conditioning (A/C) Odor Treatment