Nissan Titan. Instruction — part 374
HAC-1
VENTILATION, HEATER & AIR CONDITIONER
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D
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SECTION
HAC
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HAC
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CONTENTS
HEATER & AIR CONDITIONING CONTROL SYSTEM
AUTOMATIC AIR CONDITIONER
BASIC INSPECTION . . . . . . . . .
DIAGNOSIS AND REPAIR WORKFLOW . . ..
How to Perform Trouble Diagnosis For Quick And
Accurate Repair . . . . . . . . . . . . . ....
INSPECTION AND ADJUSTMENT . . . . . .
Operational Check . . . . . . . . . . . . ....
SYSTEM DESCRIPTION . . . . . . . ..
FUNCTION INFORMATION . . . . . . . .
Component Part Location . . . . . . . . . .....
Symptom Table . . . . . . . . . . . . . ...
REFRIGERATION SYSTEM . . . . . . . ..
Refrigerant Cycle . . . . . . . . . . . . .
Refrigerant System Protection . . . . . . . .
AUTOMATIC AIR CONDITIONER SYSTEM . .
Control System Diagram . . . . . . . . . . .
Control System Description . . . . . . . . . .
Discharge Air Flow . . . . . . . . . . . . ..
Switches And Their Control Function . . . . . ..
DIAGNOSIS SYSTEM (HVAC) . . . . . . ..
CONSULT Function (HVAC) . . . . . . . . ...
DIAGNOSIS SYSTEM (BCM) . . . . . . .
CONSULT Function (BCM - COMMON ITEM) . ...
CONSULT Function (BCM - AIR CONDITIONER) .
SELF-DIAGNOSIS FUNCTION . . . . . . ..
Front Air Control Self-Diagnosis . . . . . . . ..
Front Air Control Self-Diagnosis Code Chart . . ..
DTC/CIRCUIT DIAGNOSIS . . . . . . .
MODE DOOR MOTOR . . . . . . . . . ...
System Description . . . . . . . . . . . . .
Mode Door Motor Component Function Check . ...
Mode Door Motor Diagnosis Procedure . . . . ..
AIR MIX DOOR MOTOR . . . . . . . . ...
System Description . . . . . . . . . . . . ..
Air Mix Door Motor (Driver) Component Function
Check . . . . . . . . . . . . . . . . . ..
Air Mix Door Motor (Driver) Diagnosis Procedure .
Air Mix Door Motor (Passenger) Component
Function Check . . . . . . . . . . . . . .
Air Mix Door Motor (Passenger) Diagnosis Proce-
dure . . . . . . . . . . . . . . . . . . .
INTAKE DOOR MOTOR . . . . . . . . ...
System Description . . . . . . . . . . . . ..
Intake Door Motor Component Function Check . ..
Intake Door Motor Diagnosis Procedure . . . . .
DEFROSTER DOOR MOTOR CIRCUIT . . ...
System Description . . . . . . . . . . . . ..
Defroster Door Motor Component Function Check
Defroster Door Motor Diagnosis Procedure . . .
BLOWER MOTOR CONTROL SYSTEM . . ..
System Description . . . . . . . . . . . . ..
Front Blower Motor Component Function Check .
Front Blower Motor Diagnosis Procedure . . . .
Front Blower Motor Component Inspection . . . .
MAGNET CLUTCH . . . . . . . . . . ...
System Description . . . . . . . . . . . . ..
Magnet Clutch Component Function Check . . .
Magnet Clutch Diagnosis Procedure . . . . . ...
WATER VALVE CIRCUIT . . . . . . . . .
Description . . . . . . . . . . . . . . . ...
Water Valve Diagnosis Procedure . . . . . . ...
AMBIENT SENSOR . . . . . . . . . . ..
Component Description . . . . . . . . . . ...
Ambient Sensor Diagnosis Procedure . . . . . .
HAC-2
IN-VEHICLE SENSOR . . . . . . . . . ...
Component Description . . . . . . . . . . ..
In-Vehicle Sensor Diagnosis Procedure . . . . .
In-Vehicle Sensor Component Inspection . . . ..
OPTICAL SENSOR . . . . . . . . . . ...
Component Description . . . . . . . . . . ..
Optical Sensor Diagnosis Procedure . . . . . ..
INTAKE SENSOR . . . . . . . . . . . ..
System Description . . . . . . . . . . . . .
Intake Sensor Diagnosis Procedure . . . . . ...
Intake Sensor Component Inspection . . . . ....
POWER SUPPLY AND GROUND CIRCUIT
FOR CONTROLLER . . . . . . . . . . ..
Component Description . . . . . . . . . . ..
Front Air Control Component Function Check . ....
Front Air Control Power and Ground Diagnosis
Procedure . . . . . . . . . . . . . . . ...
ECU DIAGNOSIS INFORMATION . . . ..
AIR CONDITIONER CONTROL . . . . . .
Front Air Control Terminals Reference Values . ...
WIRING DIAGRAM . . . . . . . . . .
AIR CONDITIONER CONTROL . . . . . .
Wiring Diagram - Automatic Air Conditioner . . ...
SYMPTOM DIAGNOSIS . . . . . . . .
AIR CONDITIONER CONTROL . . . . . .
Symptom Matrix Chart . . . . . . . . . . ..
INSUFFICIENT COOLING . . . . . . . . .
Component Function Check . . . . . . . . ...
Diagnostic Work Flow . . . . . . . . . . . .
Performance Chart . . . . . . . . . . . . .
Trouble Diagnoses for Abnormal Pressure . . ....
INSUFFICIENT HEATING . . . . . . . . .
Component Function Check . . . . . . . . ...
NOISE . . . . . . . . . . . . . . . .
Component Function Check . . . . . . . . ...
MEMORY FUNCTION DOES NOT OPERATE ...
Memory Function Check . . . . . . . . . . .
PRECAUTION . . . . . . . . . . . .
PRECAUTIONS . . . . . . . . . . . . .
Working with HFC-134a (R-134a) . . . . . . ..
Precaution for Service Equipment . . . . . . ..
MANUAL A/C (TYPE 1)
BASIC INSPECTION . . . . . . . . ...
MANUAL A/C IDENTIFICATION TABLE . . ..
Application Table . . . . . . . . . . . . .
DIAGNOSIS AND REPAIR WORKFLOW . . .
How to Perform Trouble Diagnosis For Quick And
Accurate Repair . . . . . . . . . . . . . ..
INSPECTION AND ADJUSTMENT . . . . ...
Operational Check . . . . . . . . . . . . ..
SYSTEM DESCRIPTION . . . . . . ..
MANUAL A/C IDENTIFICATION TABLE . . .
Application Table . . . . . . . . . . . . ..
FUNCTION INFORMATION . . . . . . . .
Component Part Location . . . . . . . . . .
Symptom Table . . . . . . . . . . . . . .
REFRIGERATION SYSTEM . . . . . . . .
Refrigerant Cycle . . . . . . . . . . . . ..
Refrigerant System Protection . . . . . . . ..
MANUAL AIR CONDITIONER SYSTEM . . .
Control System Diagram . . . . . . . . . ...
Control System Description . . . . . . . . ..
Discharge Air Flow . . . . . . . . . . . .
Switches And Their Control Function . . . . .
DIAGNOSIS SYSTEM (HVAC) . . . . . . .
CONSULT Function (HVAC) . . . . . . . . .
DIAGNOSIS SYSTEM (BCM) . . . . . . ...
CONSULT Function (BCM - COMMON ITEM) . .
CONSULT Function (BCM - AIR CONDITIONER) .
SELF-DIAGNOSIS FUNCTION . . . . . .
Front Air Control Self-Diagnosis . . . . . . ...
Front Air Control Self-Diagnosis Code Chart . .
DTC/CIRCUIT DIAGNOSIS . . . . . ...
MANUAL A/C IDENTIFICATION TABLE . . .
Application Table . . . . . . . . . . . . ..
MODE DOOR MOTOR . . . . . . . . . .
System Description . . . . . . . . . . . ...
Mode Door Motor Component Function Check .
Mode Door Motor Diagnosis Procedure . . . .
AIR MIX DOOR MOTOR . . . . . . . . ..
System Description . . . . . . . . . . . ...
Air Mix Door Motor Component Function Check ..
Air Mix Door Motor Diagnosis Procedure . . . ..
INTAKE DOOR MOTOR . . . . . . . . ...
System Description . . . . . . . . . . . ...
Intake Door Motor Component Function Check .
Intake Door Motor Diagnosis Procedure . . . ...
DEFROSTER DOOR MOTOR CIRCUIT . . ..
HAC-3
C
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E
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A
B
HAC
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Defroster Door Motor Component Function Check
..
Defroster Door Motor Diagnosis Procedure . . ..
BLOWER MOTOR CONTROL SYSTEM . . .
System Description . . . . . . . . . . . ...
Front Blower Motor Component Function Check ..
Front Blower Motor Diagnosis Procedure . . . .
Front Blower Motor Component Inspection . . ...
MAGNET CLUTCH . . . . . . . . . . ...
System Description . . . . . . . . . . . ...
Magnet Clutch Component Function Check . . .
Magnet Clutch Diagnosis Procedure . . . . . .
WATER VALVE CIRCUIT . . . . . . . .
Description . . . . . . . . . . . . . . .
Water Valve Diagnosis Procedure . . . . . .
AMBIENT SENSOR . . . . . . . . . . .
Component Description . . . . . . . . . . .
Ambient Sensor Diagnosis Procedure . . . . ..
Ambient Sensor Component Inspection . . . .
INTAKE SENSOR . . . . . . . . . . .
System Description . . . . . . . . . . . ...
Intake Sensor Diagnosis Procedure . . . . . ..
Intake Sensor Component Inspection . . . . ...
POWER SUPPLY AND GROUND CIRCUIT
FOR CONTROLLER . . . . . . . . . .
Component Description . . . . . . . . . . .
Front Air Control Component Function Check . ..
Front Air Control Power and Ground Diagnosis
Procedure . . . . . . . . . . . . . . . ..
ECU DIAGNOSIS INFORMATION . . .
MANUAL A/C IDENTIFICATION TABLE . .
Application Table . . . . . . . . . . . . ...
AIR CONDITIONER CONTROL . . . . . ...
Front Air Control Terminals Reference Values . .
WIRING DIAGRAM . . . . . . . . .
AIR CONDITIONER CONTROL . . . . . ...
Wiring Diagram - Instruction With 2 Control Dial Sys-
tem . . . . . . . . . . . . . . . . . .
SYMPTOM DIAGNOSIS . . . . . . .
MANUAL A/C IDENTIFICATION TABLE . .
Application Table . . . . . . . . . . . . ...
AIR CONDITIONER CONTROL . . . . . ...
Symptom Matrix Chart . . . . . . . . . . .
INSUFFICIENT COOLING . . . . . . . ...
Component Function Check . . . . . . . . ..
Diagnostic Work Flow . . . . . . . . . . ...
Performance Chart . . . . . . . . . . . .
Trouble Diagnoses for Abnormal Pressure . . ...
INSUFFICIENT HEATING . . . . . . . ...
Component Function Check . . . . . . . . ..
NOISE . . . . . . . . . . . . . . . ..
Component Function Check . . . . . . . . ..
PRECAUTION . . . . . . . . . . .
PRECAUTIONS . . . . . . . . . . . ...
Working with HFC-134a (R-134a) . . . . . . .
Precaution for Service Equipment . . . . . . .
MANUAL A/C (TYPE 2)
BASIC INSPECTION . . . . . . . . .
MANUAL A/C IDENTIFICATION TABLE . ...
Application Table . . . . . . . . . . . . ...
DIAGNOSIS AND REPAIR WORKFLOW . ..
How to Perform Trouble Diagnosis For Quick And
Accurate Repair . . . . . . . . . . . . . .
INSPECTION AND ADJUSTMENT . . . .
Operational Check . . . . . . . . . . . . .
SYSTEM DESCRIPTION . . . . . . ...
MANUAL A/C IDENTIFICATION TABLE . ...
Application Table . . . . . . . . . . . . ...
FUNCTION INFORMATION . . . . . . .
Component Part Location . . . . . . . . . ..
Symptom Table . . . . . . . . . . . . . .
REFRIGERATION SYSTEM . . . . . . ...
Refrigerant Cycle . . . . . . . . . . . . ...
Refrigerant System Protection . . . . . . . ...
MANUAL AIR CONDITIONER SYSTEM . .
Control System Diagram . . . . . . . . . ...
Control System Description . . . . . . . . ...
Discharge Air Flow . . . . . . . . . . . .
Switches And Their Control Function . . . . .
DIAGNOSIS SYSTEM (BCM) . . . . . . .
CONSULT Function (BCM - COMMON ITEM) . ..
CONSULT Function (BCM - AIR CONDITIONER) ..
DTC/CIRCUIT DIAGNOSIS . . . . . ...
MANUAL A/C IDENTIFICATION TABLE . ...
Application Table . . . . . . . . . . . . ...
MODE DOOR MOTOR . . . . . . . . .
System Description . . . . . . . . . . . .
Mode Door Motor Component Function Check . .
HAC-4
AIR MIX DOOR MOTOR . . . . . . . . ..
System Description . . . . . . . . . . . .
Air Mix Door Motor Component Function Check ...
Air Mix Door Motor Diagnosis Procedure . . . ..
INTAKE DOOR MOTOR . . . . . . . . ..
System Description . . . . . . . . . . . .
Intake Door Motor Component Function Check .
Intake Door Motor Diagnosis Procedure . . . ...
DEFROSTER DOOR MOTOR CIRCUIT . . .
System Description . . . . . . . . . . . .
Defroster Door Motor Component Function Check
..
Defroster Door Motor Diagnosis Procedure . . ...
BLOWER MOTOR CONTROL SYSTEM . .
System Description . . . . . . . . . . . .
Front Blower Motor Component Function Check ...
Front Blower Motor Diagnosis Procedure . . . ..
Front Blower Motor Component Inspection . . ...
MAGNET CLUTCH . . . . . . . . . . ..
System Description . . . . . . . . . . . .
Magnet Clutch Component Function Check . . ..
Magnet Clutch Diagnosis Procedure . . . . . .
WATER VALVE CIRCUIT . . . . . . . .
Description . . . . . . . . . . . . . . . .
Water Valve Diagnosis Procedure . . . . . . .
INTAKE SENSOR . . . . . . . . . . .
System Description . . . . . . . . . . . .
Intake Sensor Diagnosis Procedure . . . . . ..
Intake Sensor Component Inspection . . . . ...
POWER SUPPLY AND GROUND CIRCUIT
FOR CONTROLLER . . . . . . . . . .
Component Description . . . . . . . . . . .
Front Air Control Component Function Check . ...
Front Air Control Power and Ground Diagnosis
Procedure . . . . . . . . . . . . . . . ..
ECU DIAGNOSIS INFORMATION . . .
MANUAL A/C IDENTIFICATION TABLE . . .
Application Table . . . . . . . . . . . . ..
AIR CONDITIONER CONTROL . . . . . ...
Front Air Control Terminals Reference Values . .
WIRING DIAGRAM . . . . . . . . ...
AIR CONDITIONER CONTROL . . . . . ...
Wiring Diagram - Instruction With 3 Control Dial Sys-
tem . . . . . . . . . . . . . . . . . .
SYMPTOM DIAGNOSIS . . . . . . ...
MANUAL A/C IDENTIFICATION TABLE . . .
Application Table . . . . . . . . . . . . ..
AIR CONDITIONER CONTROL . . . . . ...
Symptom Matrix Chart . . . . . . . . . . .
INSUFFICIENT COOLING . . . . . . . .
Component Function Check . . . . . . . . .
Diagnostic Work Flow . . . . . . . . . . ...
Performance Chart . . . . . . . . . . . .
Trouble Diagnoses for Abnormal Pressure . . ...
INSUFFICIENT HEATING . . . . . . . .
Component Function Check . . . . . . . . .
NOISE . . . . . . . . . . . . . . . ...
Component Function Check . . . . . . . . .
PRECAUTION . . . . . . . . . . ...
PRECAUTIONS . . . . . . . . . . . .
Working with HFC-134a (R-134a) . . . . . . .
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