Lincoln Aviator: Service Information / General Information

Service Information

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Description and Operation - About this Manual

Introduction   WARNING: Before beginning any service procedure in this manual, refer to health and safety warnings in section 100-00 General Information...

Other information:

Lincoln Aviator 2020-2024 Owners Manual: Guarding Against Exhaust Fumes. Important Ventilating Information

Guarding Against Exhaust Fumes WARNING: Exhaust leaks may result in entry of harmful and potentially lethal fumes into the passenger compartment. If you smell exhaust fumes inside your vehicle, have your vehicle inspected immediately. Do not drive if you smell exhaust fumes...

Lincoln Aviator 2020-2024 Service Manual: Diagnosis and Testing - Climate Control System

Diagnostic Trouble Code (DTC) Chart Diagnostics in this manual assume a certain skill level and knowledge of Ford-specific diagnostic practices. REFER to: Diagnostic Methods (100-00 General Information, Description and Operation).   Diagnostic Trouble Code Chart Module   DTC Description Action   ACCM B11EE:19 A/C Compressor: Circuit Current Above Threshold   GO to Pinpoint Test AJ   ACCM B11EE:41 A/C Compressor: General Checksum Failure   GO to Pinpoint Test AS   ACCM B11EE:4B A/C Compressor: Over Temperature   GO to Pinpoint Test AJ   ACCM B11EE:92 A/C Compressor: Performance or Incorrect Operation   GO to Pinpoint Test AJ   ACCM P0562:00 System Voltage Low: No Sub Type Information   GO to Pinpoint Test AJ   ACCM P0563:00 System Voltage High: No Sub Type Information   GO to Pinpoint Test AJ   ACCM P0AFA:16 Hybrid/EV Battery System Voltage Low: Circuit Voltage Below Threshold   GO to Pinpoint Test AJ   ACCM P0AFB:17 Hybrid/EV Battery System Voltage High: Circuit Voltage Above Threshold   GO to Pinpoint Test AJ   ACCM P0AFB:1C Hybrid/EV Battery System Voltage High: Circuit Voltage Out of Range   GO to Pinpoint Test AJ   ACCM U0001:88 High Speed CAN Communication Bus: Bus Off   GO to Pinpoint Test AP   ACCM U0100:00 Lost Communication with ECM/PCM "A": No Sub Type Information   GO to Pinpoint Test AL   ACCM U0111:00 Lost Communication With Battery Energy Control Module "A": No Sub Type Information   GO to Pinpoint Test AM   ACCM U0140:00 Lost Communication With Body Control Module: No Sub Type Information   GO to Pinpoint Test P   ACCM U3000:04 Control Module: System Internal Failure   GO to Pinpoint Test AS   ACCM U3000:42 Control Module: General Memory Failure   GO to Pinpoint Test AS   ACCM U3000:49 Control Module: Internal Electronic Failure   GO to Pinpoint Test AS   BCMC B3A01:00 A/C Refrigerant Distribution Valve Actuator "C" Control Circuit/Open: No Sub Type Information   GO to Pinpoint Test AV   BCMC B3A02:00 A/C Refrigerant Distribution Valve Actuator "C" Control Circuit Low: No Sub Type Information   GO to Pinpoint Test AV   BCMC B3A03:00 A/C Refrigerant Distribution Valve Actuator "C" Control Circuit High: No Sub Type Information   GO to Pinpoint Test AV   BCMC P2611:00 A/C Refrigerant Distribution Valve "A" Control Circuit/Open: No Sub Type Information   GO to Pinpoint Test AT   BCMC P2612:00 A/C Refrigerant Distribution Valve "A" Control Circuit Low: No Sub Type Information   GO to Pinpoint Test AT   BCMC P2613:00 A/C Refrigerant Distribution Valve "A" Control Circuit High: No Sub Type Information   GO to Pinpoint Test AT   BCMC P2CFC:00 A/C Clutch Control Circuit: No Sub Type Information   GO to Pinpoint Test B   BCMC P2CFD:00 A/C Clutch Control Circuit Low: No Sub Type Information   GO to Pinpoint Test B   BCMC P2CFE:00 A/C Clutch Control Circuit: No Sub Type Information   GO to Pinpoint Test B   BCMC P2E62:00 Engine Coolant Bypass Valve "E" Control Circuit/Open: No Sub Type Information   GO to Pinpoint Test AU   BCMC P2E63:00 Engine Coolant Bypass Valve "E" Control Circuit Low: No Sub Type Information   GO to Pinpoint Test AU   BCMC P2E64:00 Engine Coolant Bypass Valve "E" Control Circuit High: No Sub Type Information   GO to Pinpoint Test AU   HVAC B102E:11 Air Quality Sensor: Circuit Short To Ground   GO to Pinpoint Test Y   HVAC B102E:15 Air Quality Sensor: Circuit Short To Battery or Open   GO to Pinpoint Test Y   HVAC B102E:92 Air Quality Sensor: Performance or Incorrect Operation   GO to Pinpoint Test Y   HVAC B1081:07 Left Temperature Damper Motor: Mechanical Failure   GO to Pinpoint Test G   HVAC B1081:11 Left Temperature Damper Motor: Circuit Short To Ground   GO to Pinpoint Test G   HVAC B1081:12 Left Temperature Damper Motor: Circuit Short To Battery   GO to Pinpoint Test G   HVAC B1081:13 Left Temperature Damper Motor: Circuit Open   GO to Pinpoint Test G   HVAC B1082:07 Right Temperature Damper Motor: Mechanical Failure   GO to Pinpoint Test H   HVAC B1082:11 Right Temperature Damper Motor: Circuit Short To Ground   GO to Pinpoint Test H   HVAC B1082:12 Right Temperature Damper Motor: Circuit Short To Battery   GO to Pinpoint Test H   HVAC B1082:13 Right Temperature Damper Motor: Circuit Open   GO to Pinpoint Test H   HVAC B1083:07 Recirculation Damper Motor: Mechanical Failure   GO to Pinpoint Test I   HVAC B1083:11 Recirculation Damper Motor: Circuit Short To Ground   GO to Pinpoint Test I   HVAC B1083:12 Recirculation Damper Motor: Circuit Short To Battery   GO to Pinpoint Test I   HVAC B1083:13 Recirculation Damper Motor: Circuit Open   GO to Pinpoint Test I   HVAC B1086:07 Air Distribution Damper Motor: Mechanical Failure   GO to Pinpoint Test J   HVAC B1086:11 Air Distribution Damper Motor: Circuit Short To Ground   GO to Pinpoint Test J   HVAC B1086:12 Air Distribution Damper Motor: Circuit Short To Battery   GO to Pinpoint Test J   HVAC B1086:13 Air Distribution Damper Motor: Circuit Open   GO to Pinpoint Test J   HVAC B10AF:11 Blower Fan Relay: Circuit Short To Ground   GO to Pinpoint Test N   HVAC B10AF:15 Blower Fan Relay: Circuit Short To Battery or Open   GO to Pinpoint Test N   HVAC B10AF:15 Blower Fan Relay: Circuit Short To Battery or Open   GO to Pinpoint Test O   HVAC B10B3:11 Right Panel Air Discharge Temperature: Circuit Short To Ground   GO to Pinpoint Test AA   HVAC B10B3:15 Right Panel Air Discharge Temperature: Circuit Short To Battery or Open   GO to Pinpoint Test AA   HVAC B10B4:11 Right Floor Air Discharge Temperature: Circuit Short To Ground   GO to Pinpoint Test AA   HVAC B10B4:15 Right Floor Air Discharge Temperature: Circuit Short To Battery or Open   GO to Pinpoint Test AA   HVAC B10B5:11 Left Panel Air Discharge Temperature: Circuit Short To Ground   GO to Pinpoint Test AA   HVAC B10B5:15 Left Panel Air Discharge Temperature: Circuit Short To Battery or Open   GO to Pinpoint Test AA   HVAC B10B6:11 Left Floor Air Discharge Temperature: Circuit Short To Ground   GO to Pinpoint Test AA   HVAC B10B6:15 Left Floor Air Discharge Temperature: Circuit Short To Battery or Open   GO to Pinpoint Test AA   HVAC B10B7:11 Rear Air Discharge Temperature: Circuit Short To Ground   GO to Pinpoint Test AG   HVAC B10B7:15 Rear Air Discharge Temperature: Circuit Short To Battery Or Open   GO to Pinpoint Test AG   HVAC B10B9:12 Blower Control: Circuit Short To Battery   GO to Pinpoint Test N   HVAC B10B9:14 Blower Control: Circuit Short To Ground or Open   GO to Pinpoint Test N   HVAC B10BA:12 Rear Blower Control: Circuit Short To Battery   GO to Pinpoint Test AX   HVAC B10BA:14 Rear Blower Control: Circuit Short To Ground or Open   GO to Pinpoint Test AX   HVAC B11E3:07 Rear HVAC Damper Motor: Mechanical Failure   GO to Pinpoint Test AG   HVAC B11E3:11 Rear HVAC Damper Motor: Circuit Short To Ground   GO to Pinpoint Test AG   HVAC B11E3:12 Rear HVAC Damper Motor: Circuit Short To Battery   GO to Pinpoint Test AG   HVAC B11E3:13 Rear HVAC Damper Motor: Circuit Open   GO to Pinpoint Test AG   HVAC B11E4:07 Rear Air Distribution Damper Motor: Mechanical Failure   GO to Pinpoint Test AF   HVAC B11E4:11 Rear Air Distribution Damper Motor: Circuit Short to Ground   GO to Pinpoint Test AF   HVAC B11E4:12 Rear Air Distribution Damper Motor: Circuit Short To Battery   GO to Pinpoint Test AF   HVAC B11E4:13 Rear Air Distribution Damper Motor: Circuit Open   GO to Pinpoint Test AF   HVAC B11E5:11 Left HVAC Damper Position Sensor: Circuit Short To Ground   GO to Pinpoint Test G   HVAC B11E5:15 Left HVAC Damper Position Sensor: Circuit Short To Battery or Open   GO to Pinpoint Test G   HVAC B11E6:11 Right HVAC Damper Position Sensor: Circuit Short To Ground   GO to Pinpoint Test H   HVAC B11E6:15 Right HVAC Damper Position Sensor: Circuit Short To Battery or Open   GO to Pinpoint Test H   HVAC B11E7:11 Air Distribution Damper Position Sensor: Circuit Short To Ground   GO to Pinpoint Test J   HVAC B11E7:15 Air Distribution Damper Position Sensor: Circuit Short To Battery or Open   GO to Pinpoint Test J   HVAC B11EC:12 Rear HVAC Blower Control Input: Circuit Short To Battery   GO to Pinpoint Test AD   HVAC B11EC:14 Rear HVAC Blower Control Input: Circuit Short To Ground or Open   GO to Pinpoint Test AD   HVAC B11F0:11 Air Intake Damper Position Sensor: Circuit Short To Ground   GO to Pinpoint Test I   HVAC B11F0:15 Air Intake Damper Position Sensor: Circuit Short To Battery or Open   GO to Pinpoint Test I   HVAC B1364:07 Left Rear Temperature Damper Motor: Mechanical Failure   GO to Pinpoint Test AH   HVAC B1364:11 Left Rear Temperature Damper Motor: Circuit Short To Ground   GO to Pinpoint Test AH   HVAC B1364:12 Left Rear Temperature Damper Motor: Circuit Short To Battery   GO to Pinpoint Test AH   HVAC B1364:13 Left Rear Temperature Damper Motor: Circuit Open   GO to Pinpoint Test AH   HVAC B1379:11 Rear Cabin Temperature Sensor: Circuit Short To Ground   GO to Pinpoint Test BB   HVAC B1379:15 Rear Cabin Temperature Sensor: Circuit Short To Battery or Open   GO to Pinpoint Test BB   HVAC B14D3:11 Left Rear Panel Discharge Sensor: Circuit Short To Ground   GO to Pinpoint Test BA   HVAC B14D3:15 Left Rear Panel Discharge Sensor: Circuit Short To Battery or Open   GO to Pinpoint Test BA   HVAC B14D4:11 Left Rear Floor Discharge Sensor: Circuit Short To Ground   GO to Pinpoint Test BA   HVAC B14D4:15 Left Rear Floor Discharge Sensor: Circuit Short To Battery or Open   GO to Pinpoint Test BA   HVAC B1580:11 Console Airflow Shut Off Door Position Sensor: Circuit Short To Ground   GO to Pinpoint Test AZ   HVAC B1580:15 Console Airflow Shut Off Door Position Sensor: Circuit Short To Battery or Open   GO to Pinpoint Test AZ   HVAC B1581:07 Console Airflow Shut Off Door Damper Motor: Mechanical Failure   GO to Pinpoint Test AZ   HVAC B1581:11 Console Airflow Shut Off Door Damper Motor: Circuit Short To Ground   GO to Pinpoint Test AZ   HVAC B1581:12 Console Airflow Shut Off Door Damper Motor: Circuit Short To Battery   GO to Pinpoint Test AZ   HVAC B1581:13 Console Airflow Shut Off Door Damper Motor: Circuit Open   GO to Pinpoint Test AZ   HVAC B1582:11 Left Panel Discharge Sensor #3: Circuit Short To Ground   GO to Pinpoint Test BA   HVAC B1582:15 Left Panel Discharge Sensor #3: Circuit Short To Battery or Open   GO to Pinpoint Test BA   HVAC B158C:11 Air Distribution Damper Position Sensor #3: Circuit Short To Ground   GO to Pinpoint Test AF   HVAC B158C:15 Air Distribution Damper Position Sensor #3: Circuit Short To Battery or Open   GO to Pinpoint Test AF   HVAC B158F:11 Left HVAC Damper Position Sensor #3: Circuit Short To Ground   GO to Pinpoint Test AH   HVAC B158F:15 Left HVAC Damper Position Sensor #3: Circuit Short To Battery or Open   GO to Pinpoint Test AH   HVAC B159B:11 Cabin Temperature Sensor #3: Circuit Short To Ground   GO to Pinpoint Test BB   HVAC B159B:15 Cabin Temperature Sensor #3: Circuit Short To Battery or Open   GO to Pinpoint Test BB   HVAC B159E:07 Air Distribution Damper Motor #3: Mechanical Failure   GO to Pinpoint Test AF   HVAC B159E:11 Air Distribution Damper Motor #3: Circuit Short To Ground   GO to Pinpoint Test AF   HVAC B159E:12 Air Distribution Damper Motor #3: Circuit Short To Battery   GO to Pinpoint Test AF   HVAC B159E:13 Air Distribution Damper Motor #3: Circuit Open   GO to Pinpoint Test AF   HVAC B1A61:11 Cabin Temperature Sensor: Circuit Short To Ground   GO to Pinpoint Test E   HVAC B1A61:15 Cabin Temperature Sensor: Circuit Short To Battery or Open   GO to Pinpoint Test E   HVAC B1A63:11 Right Solar Sensor: No Sub Type Information   GO to Pinpoint Test Z   HVAC B1A63:15 Right Solar Sensor: Circuit Short To Battery or Open   GO to Pinpoint Test Z   HVAC B1A64:11 Left Solar Sensor: No Sub Type Information   GO to Pinpoint Test Z   HVAC B1A64:15 Left Solar Sensor: Circuit Short To Battery or Open   GO to Pinpoint Test Z   HVAC B1A69:11 Humidity Sensor: Circuit Short To Ground   GO to Pinpoint Test E   HVAC B1A69:15 Humidity Sensor: Circuit Short To Battery or Open   GO to Pinpoint Test E   HVAC B1B71:11 Evaporator Temperature Sensor: Circuit Short To Ground   GO to Pinpoint Test F   HVAC B1B71:15 Evaporator Temperature Sensor: Circuit Short To Battery or Open   GO to Pinpoint Test F   HVAC B1B7D:11 Rear Air Distribution Actuator: Circuit Short to Ground   GO to Pinpoint Test AF   HVAC B1B7D:15 Rear Air Distribution Actuator: Circuit Short To Battery or Open   GO to Pinpoint Test AF   HVAC C1B14:11 Sensor Supply Voltage A: Circuit Short to Ground   GO to Pinpoint Test AC   HVAC C1B14:12 Sensor Supply Voltage A: Circuit Short to Battery   GO to Pinpoint Test AC   HVAC P24AE:09 Particulate Matter Sensor Circuit: Component Failure   GO to Pinpoint Test AW   HVAC P24AE:8F Particulate Matter Sensor Circuit: Erratic   GO to Pinpoint Test AW   HVAC P24AE:92 Particulate Matter Sensor Circuit: Performance or Incorrect Operation   GO to Pinpoint Test AW   HVAC U0140:00 Lost Communication With Body Control Module: No Sub Type Information   GO to Pinpoint Test P   HVAC U0155:00 Lost Communication With Instrument Panel Cluster (IPC) Control Module: No Sub-Type Information   GO to Pinpoint Test Q   HVAC U0165:00 Lost Communication With HVAC Control Module - Rear: No Sub Type Information   GO to Pinpoint Test S   HVAC U0249:00 Lost Communication With Entertainment Control Module -Rear "B": No Sub Type Information   GO to Pinpoint Test T   HVAC U0253:00 Lost Communication With Accessory Protocol Interface Module: No Sub Type Information   GO to Pinpoint Test V   HVAC U025D:00 Lost Communication With Front Controls Interface Module "B": No Sub Type Information   GO to Pinpoint Test W   HVAC U0401:00 Invalid Data Received from ECM/PCM A: No Sub-Type Information   GO to Pinpoint Test AQ   HVAC U0401:82 Invalid Data Received from ECM/PCM A: Alive / Sequence Counter Incorrect / Not Updated   GO to Pinpoint Test AQ   HVAC U0422:68 Invalid Data Received from Body Control Module: Event Information   GO to Pinpoint Test AQ   HVAC U0422:81 Invalid Data Received from Body Control Module: Invalid Serial Data Received   GO to Pinpoint Test AQ   HVAC U0452:00 Invalid Data Received From Restraints Control Module: No Sub Type Information   GO to Pinpoint Test AQ   HVAC U054A:68 Invalid Data Received From Entertainment Control Module-Rear "B": Event Information   GO to Pinpoint Test AQ   HVAC U055E:68 Invalid Data Received From Front Controls Interface Module "B": Event Information   GO to Pinpoint Test AQ   HVAC U1000:00 Solid State Driver Protection Active -Driver Disabled: No Sub Type Information   GO to Pinpoint Test X   HVAC U2024:51 Control Module Cal-Config Data: Not Programmed   GO to Pinpoint Test AR   HVAC U2100:00 Initial Configuration Not Complete: No Sub Type Information   GO to Pinpoint Test AR   HVAC U3000:49 Control Module: Internal Electronic Failure   GO to Pinpoint Test AS   HVAC U3003:16 Battery Voltage: Circuit Voltage Below Threshold   GO to Pinpoint Test AN   HVAC U3003:17 Battery Voltage: Circuit Voltage Above Threshold   GO to Pinpoint Test AO   PCM P0532:00 A/C Refrigerant Pressure Sensor A Circuit Low: No Sub Type Information   GO to Pinpoint Test A   PCM P0533:00 A/C Refrigerant Pressure Sensor A Circuit High: No Sub Type Information   GO to Pinpoint Test A   PCM P0645:00 A/C Clutch Relay Control Circuit: No Sub Type Information   GO to Pinpoint Test B   PCM P06A0:00 Variable Compressor Control Circuit: No Sub Type Information   GO to Pinpoint Test C   PCM P1464:00 A/C Demand Out Of Self Test Range: No Sub Type Information   GO to Pinpoint Test M   PCM P193E:00 A/C Clutch Request Signal: No Sub Type Information   GO to Pinpoint Test AB   PCM P2183:00 Engine Coolant Temperature Sensor 2: Circuit Range/Performance   GO to Pinpoint Test BC   PCM P2184:00 Engine Coolant Temperature Sensor 2: Circuit Low   GO to Pinpoint Test BC   PCM P2185:00 Engine Coolant Temperature Sensor 2: Circuit High   GO to Pinpoint Test BC   PCM P2186:00 Engine Coolant Temperature Sensor 2: Circuit Intermittent/Erratic   GO to Pinpoint Test BC   PCM P2600:00 Coolant Pump "A" Control Circuit/Open: No Sub Type Information   GO to Pinpoint Test D   PCM P2601:00 Coolant Pump "A" Control Circuit Performance/Stuck Off: No Sub Type Information   GO to Pinpoint Test D   PCM P2602:00 Coolant Pump "A" Control Circuit Low: No Sub Type Information   GO to Pinpoint Test D   PCM P2603:00 Coolant Pump "A" Control Circuit High: No Sub Type Information   GO to Pinpoint Test D   PCM P26BE:00 Engine Coolant Bypass Valve "D" Control Circuit Low: No Sub Type Information   GO to Pinpoint Test BH   PCM P26BF:00 Engine Coolant Bypass Valve "D" Control Circuit High: No Sub Type Information   GO to Pinpoint Test BH   RHVAC B10B8:63 Push Buttons: Circuit / Component Protection Time-Out   GO to Pinpoint Test AI   RHVAC U0140:00 Lost Communication With Body Control Module: No Sub Type Information   GO to Pinpoint Test P   RHVAC U0164:00 Lost Communication With HVAC Control Module: No Sub Type Information   GO to Pinpoint Test R   RHVAC U0247:00 Lost Communication With Seat Control Module "F": No Sub Type Information   GO to Pinpoint Test U   RHVAC U0422:68 Invalid Data Received From Body Control Module: Event Information   GO to Pinpoint Test AQ   RHVAC U3000:41 Control Module: General Checksum Failure   GO to Pinpoint Test AS   RHVAC U3000:42 Control Module: General Memory Failure   GO to Pinpoint Test AS   RHVAC U3003:16 Battery Voltage: Circuit Voltage Below Threshold   GO to Pinpoint Test AN   RHVAC U3003:17 Battery Voltage: Circuit Voltage Above Threshold   GO to Pinpoint Test AO   SOBDMC P01EB:96 Engine Coolant Heater "A" Control Circuit Performance: Component Internal Failure   GO to Pinpoint Test AK   SOBDMC P0531:00 A/C Refrigerant Pressure Sensor "A" Circuit Range/Performance: No Sub Type Information   GO to Pinpoint Test A   SOBDMC P0534:00 A/C Refrigerant Charge Loss: No Sub Type Information   GO to Pinpoint Test A   SOBDMC P0D6D:00 A/C Compressor Motor Voltage "A" Low: No Sub Type Information   GO to Pinpoint Test AJ   SOBDMC P0D6F:00 A/C Compressor Motor Current High: No Sub Type Information   GO to Pinpoint Test AJ   SOBDMC P0D71:00 A/C Compressor Control Module Internal Temperature Sensor Performance: No Sub Type Information   GO to Pinpoint Test AJ   SOBDMC P2611:00 A/C Refrigerant Distribution Valve "A" Control Circuit/Open: No Sub Type Information   GO to Pinpoint Test AT   SOBDMC P2612:00 A/C Refrigerant Distribution Valve "A" Control Circuit Low: No Sub Type Information   GO to Pinpoint Test AT   SOBDMC P2613:00 A/C Refrigerant Distribution Valve "A" Control Circuit High: No Sub Type Information   GO to Pinpoint Test AT   SOBDMC P26FD:00 A/C Compressor Internal Control Module Performance: No Sub Type Information   GO to Pinpoint Test AJ   SOBDMC P2D41:00 A/C Compressor Motor Voltage "B" Performance: No Sub Type Information   GO to Pinpoint Test AJ   SOBDMC P2D42:00 A/C Compressor Motor Voltage "B" Low: No Sub Type Information   GO to Pinpoint Test AJ   SOBDMC P2D44:00 A/C Compressor Motor Performance: No Sub Type Information   GO to Pinpoint Test AJ   SOBDMC P2DA4:00 Coolant Heater "A" Internal Control Module Performance: No Sub Type Information   GO to Pinpoint Test AK   SOBDMC P2DA5:00 Coolant Heater "A" Supply Voltage Circuit: No Sub Type Information   GO to Pinpoint Test AK   SOBDMC P2DA6:00 Coolant Heater "A" Over Temperature: No Sub Type Information   GO to Pinpoint Test AK   SOBDMC P2DA7:00 Coolant Heater "A" Internal Control Module Control Module System Voltage: No Sub Type Information   GO to Pinpoint Test AK   SOBDMC P2E62:00 Engine Coolant Bypass Valve "E" Control Circuit/Open: No Sub Type Information   GO to Pinpoint Test AU   SOBDMC P2E63:00 Engine Coolant Bypass Valve "E" Control Circuit Low: No Sub Type Information   GO to Pinpoint Test AU   SOBDMC P2E64:00 Engine Coolant Bypass Valve "E" Control Circuit High: No Sub Type Information   GO to Pinpoint Test AU   SOBDMC U069E:81 Lost Communication With Coolant Heater "A": Invalid Serial Data Received   GO to Pinpoint Test AK   SOBDMC U069E:87 Lost Communication With Coolant Heater "A": Missing Messages   GO to Pinpoint Test AK Global Customer Symptom Code (GCSC) Chart Diagnostics in this manual assume a certain skill level and knowledge of Ford-specific diagnostic practices...