Nissan Leaf. Manual — part 750
HAC-3
C
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F
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J
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M
A
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HAC
N
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B27A2, B27A3, B27A4, B27A5 AIR MIX
DOOR MOTOR . . . . . . . . . . . . .
DTC Logic . . . . . . . . . . . . . . . .
Diagnosis Procedure . . . . . . . . . . . .
Component Inspection . . . . . . . . . . ..
B27A6, B27A7, B27A8, B27A9 MODE DOOR
MOTOR . . . . . . . . . . . . . . . .
DTC Logic . . . . . . . . . . . . . . . .
Diagnosis Procedure . . . . . . . . . . . .
Component Inspection . . . . . . . . . . ..
B27B1, B27B2, B27B3, B27BB ELECTRIC
COMPRESSOR . . . . . . . . . . . .
DTC Logic . . . . . . . . . . . . . . . .
Diagnosis Procedure . . . . . . . . . . . .
B27B4 ELECTRIC COMPRESSOR . . . . .
DTC Logic . . . . . . . . . . . . . . . .
Diagnosis Procedure . . . . . . . . . . . .
B27B5, 27B6, B27B7, B27BA, B27BE ELEC-
TRIC COMPRESSOR . . . . . . . . . ...
DTC Logic . . . . . . . . . . . . . . . .
Diagnosis Procedure . . . . . . . . . . . .
B27B8 ELECTRIC COMPRESSOR . . . . .
DTC Logic . . . . . . . . . . . . . . . .
Diagnosis Procedure . . . . . . . . . . . .
B27B9 ELECTRIC COMPRESSOR . . . . .
DTC Logic . . . . . . . . . . . . . . . .
Diagnosis Procedure . . . . . . . . . . . .
B27BC ELECTRIC COMPRESSOR . . . .
DTC Logic . . . . . . . . . . . . . . . .
Diagnosis Procedure . . . . . . . . . . . .
B27BF ELECTRIC COMPRESSOR . . . . .
DTC Logic . . . . . . . . . . . . . . . .
Diagnosis Procedure . . . . . . . . . . . .
Component Inspection . . . . . . . . . . ..
B27C0 ELECTRIC COMPRESSOR . . . . .
DTC Logic . . . . . . . . . . . . . . . .
Diagnosis Procedure . . . . . . . . . . . .
B27CC, B27CD ELECTRIC COMPRESSOR ..
DTC Logic . . . . . . . . . . . . . . . .
Diagnosis Procedure . . . . . . . . . . . .
B27CE ELECTRIC COMPRESSOR . . . .
DTC Logic . . . . . . . . . . . . . . . .
Diagnosis Procedure . . . . . . . . . . . .
B27C1 HEAT PUMP CONTROL UNIT . . .
DTC Logic . . . . . . . . . . . . . . . .
Diagnosis Procedure . . . . . . . . . . . .
B27C2, B27C3 PTC HEATER OUTLET AIR
TEMPERATURE SENSOR . . . . . . . ..
DTC Logic . . . . . . . . . . . . . . . ..
Diagnosis Procedure . . . . . . . . . . . .
Component Inspection . . . . . . . . . . ...
B27C4, B27C5 A/C UNIT CASE TEMPERA-
TURE SENSOR . . . . . . . . . . . ...
DTC Logic . . . . . . . . . . . . . . . ..
Diagnosis Procedure . . . . . . . . . . . .
Component Inspection . . . . . . . . . . ...
B27C6, B27C7 COMPRESSOR DISCHARGE
REFRIGERANT TEMPERATURE SENSOR ..
DTC Logic . . . . . . . . . . . . . . . ..
Diagnosis Procedure . . . . . . . . . . . .
Component Inspection . . . . . . . . . . ...
B27C8, B27C9 COMPRESSOR SUCTION
REFRIGERANT TEMPERATURE SENSOR ..
DTC Logic . . . . . . . . . . . . . . . ..
Diagnosis Procedure . . . . . . . . . . . .
Component Inspection . . . . . . . . . . ...
B27F0 REFRIGERANT CHANNEL SWITCH-
ING 2 WAY TYPE VALVE . . . . . . . ...
DTC Logic . . . . . . . . . . . . . . . ..
Diagnosis Procedure . . . . . . . . . . . .
Component Inspection . . . . . . . . . . ...
B27F1 REFRIGERANT CHANNEL SWITCH-
ING 2 WAY TYPE VALVE . . . . . . . ...
DTC Logic . . . . . . . . . . . . . . . ..
Diagnosis Procedure . . . . . . . . . . . .
B27F2 REFRIGERANT CHANNEL SWITCH-
ING 2 WAY TYPE VALVE . . . . . . . ...
DTC Logic . . . . . . . . . . . . . . . ..
Diagnosis Procedure . . . . . . . . . . . .
B27F3 REFRIGERANT CHANNEL SWITCH-
ING 3 WAY TYPE VALVE . . . . . . . ...
DTC Logic . . . . . . . . . . . . . . . ..
Diagnosis Procedure . . . . . . . . . . . .
Component Inspection . . . . . . . . . . ...
B27F4 REFRIGERANT CHANNEL SWITCH-
ING 3 WAY TYPE VALVE . . . . . . . ...
DTC Logic . . . . . . . . . . . . . . . ..
Diagnosis Procedure . . . . . . . . . . . .
B27F5 REFRIGERANT CHANNEL SWITCH-
ING 3 WAY TYPE VALVE . . . . . . . ...
DTC Logic . . . . . . . . . . . . . . . ..
Diagnosis Procedure . . . . . . . . . . . .
B27FF A/C AUTO AMP. . . . . . . . . .
DTC Logic . . . . . . . . . . . . . . . ..
Diagnosis Procedure . . . . . . . . . . . .
POWER SUPPLY AND GROUND CIRCUIT ..
HAC-4
A/C AUTO AMP. : Diagnosis Procedure . . . ...
BLOWER MOTOR . . . . . . . . . . ...
Component Function Check . . . . . . . . ..
Diagnosis Procedure . . . . . . . . . . . .
Component Inspection (Blower Motor) . . . . ..
Component Inspection (Blower Relay) . . . . ..
ELECTRIC COMPRESSOR INSULATION
RESISTANCE CHECK . . . . . . . . .
Component Inspection . . . . . . . . . . ...
PTC HEATER INSPECTION RESISTANCE
CHECK . . . . . . . . . . . . . . . .
Component Inspection . . . . . . . . . . ...
SYMPTOM DIAGNOSIS . . . . . . .
AUTOMATIC AIR CONDITIONING SYSTEM .
Symptom Table . . . . . . . . . . . . . .
INSUFFICIENT COOLING . . . . . . . ...
Description . . . . . . . . . . . . . . . .
Diagnosis Procedure . . . . . . . . . . . .
INSUFFICIENT HEATING . . . . . . . ...
Description . . . . . . . . . . . . . . . .
Diagnosis Procedure . . . . . . . . . . . .
COMPRESSOR DOES NOT OPERATE . . .
Description . . . . . . . . . . . . . . . .
Diagnosis Procedure . . . . . . . . . . . .
REMOVAL AND INSTALLATION . . . ..
A/C CONTROL (A/C AUTO AMP.) . . . . ..
Removal and Installation . . . . . . . . . ...
HEAT PUMP CONTROL UNIT . . . . . .
Removal and Installation . . . . . . . . . ...
AMBIENT SENSOR . . . . . . . . . . .
Removal and Installation . . . . . . . . . ...
IN-VEHICLE SENSOR . . . . . . . . . .
Removal and Installation . . . . . . . . . ...
SUNLOAD SENSOR . . . . . . . . . ...
Removal and Installation . . . . . . . . . ...
INTAKE SENSOR . . . . . . . . . . .
Exploded View . . . . . . . . . . . . . ...
Removal and Installation . . . . . . . . . ...
COMPRESSOR DISCHARGE REFRIGER-
ANT TEMPERATURE SENSOR . . . . . .
Exploded View . . . . . . . . . . . . . ...
Removal and Installation . . . . . . . . . ...
COMPRESSOR SUCTION REFRIGERANT
TEMPERATURE SENSOR . . . . . . . ..
Exploded View . . . . . . . . . . . . . ...
Removal and Installation . . . . . . . . . ...
PTC HEATER OUTLET AND A/C UNIT CASE
AIR TEMPERATURE SENSOR ASSEMBLY ..
Exploded View . . . . . . . . . . . . . ..
Removal and Installation . . . . . . . . . ...
POWER TRANSISTOR . . . . . . . . .
Exploded View . . . . . . . . . . . . . ..
Removal and Installation . . . . . . . . . ...
PTC HEATER . . . . . . . . . . . . ...
Exploded View . . . . . . . . . . . . . ..
Removal and Installation . . . . . . . . . ...
DOOR MOTOR . . . . . . . . . . . . .
Exploded View . . . . . . . . . . . . . ..
INTAKE DOOR MOTOR . . . . . . . . . . .
INTAKE DOOR MOTOR : Removal and Installa-
tion . . . . . . . . . . . . . . . . . .
MODE DOOR MOTOR . . . . . . . . . . .
MODE DOOR MOTOR : Removal and Installation .
AIR MIX DOOR MOTOR . . . . . . . . . . .
AIR MIX DOOR MOTOR : Removal and Installa-
tion . . . . . . . . . . . . . . . . . .
AUTO A/C (WITHOUT HEAT PUMP)
PRECAUTION . . . . . . . . . . ...
PRECAUTIONS . . . . . . . . . . . .
Precaution for Technicians Using Medical Electric .
Point to Be Checked Before Starting Maintenance
Work . . . . . . . . . . . . . . . . . ..
Precaution for Procedure without Cowl Top Cover .
High Voltage Precautions . . . . . . . . . .
Precaution for Removing 12V Battery . . . . ...
Precautions for Service Work of Cooler System ...
Service Equipment . . . . . . . . . . . .
PREPARATION . . . . . . . . . . .
PREPARATION . . . . . . . . . . . .
Commercial Service Tools . . . . . . . . .
Special Service Tool . . . . . . . . . . . .
Oil and Grease . . . . . . . . . . . . . ..
SYSTEM DESCRIPTION . . . . . . ..
COMPONENT PARTS . . . . . . . . . ..
AUTOMATIC AIR CONDITIONING SYSTEM . . .
AUTOMATIC AIR CONDITIONING SYSTEM :
Component Parts Location . . . . . . . . ...
A/C UNIT ASSEMBLY . . . . . . . . . . .
HAC-5
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HAC
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A/C UNIT ASSEMBLY : Intake Sensor . . . . .
A/C UNIT ASSEMBLY : PTC Heater Outlet Air
Temperature Sensor . . . . . . . . . . . .
A/C UNIT ASSEMBLY : A/C Unit Case Tempera-
ture Sensor . . . . . . . . . . . . . . .
A/C UNIT ASSEMBLY : Air Mix Door Motor . . .
A/C UNIT ASSEMBLY : Mode Door Motor . . ...
A/C UNIT ASSEMBLY : Intake Door Motor . . ...
A/C UNIT ASSEMBLY : Blower Motor . . . . ..
A/C UNIT ASSEMBLY : Power Transistor . . .
A/C Auto Amp. . . . . . . . . . . . . . ..
Ambient Sensor . . . . . . . . . . . . . .
In-Vehicle Sensor . . . . . . . . . . . . ..
Sunload Sensor . . . . . . . . . . . . . .
Refrigerant Pressure Sensor . . . . . . . . .
Electric Compressor . . . . . . . . . . . ..
PTC Heater . . . . . . . . . . . . . . ...
SYSTEM . . . . . . . . . . . . . . ...
AUTOMATIC AIR CONDITIONING SYSTEM . . .
AUTOMATIC AIR CONDITIONING SYSTEM :
System Description . . . . . . . . . . . ...
AUTOMATIC AIR CONDITIONING SYSTEM :
Temperature Control . . . . . . . . . . . .
AUTOMATIC AIR CONDITIONING SYSTEM : Air
Outlet Control . . . . . . . . . . . . . .
AUTOMATIC AIR CONDITIONING SYSTEM : Air
Flow Control . . . . . . . . . . . . . . ..
AUTOMATIC AIR CONDITIONING SYSTEM : Air
Inlet Control . . . . . . . . . . . . . . ...
AUTOMATIC AIR CONDITIONING SYSTEM :
Electric Power Distribution Control . . . . . .
AUTOMATIC AIR CONDITIONING SYSTEM :
Compressor Control . . . . . . . . . . . ..
AUTOMATIC AIR CONDITIONING SYSTEM :
Door Control . . . . . . . . . . . . . . ..
AUTOMATIC AIR CONDITIONING SYSTEM :
PTC Heater Control . . . . . . . . . . . ...
AUTOMATIC AIR CONDITIONING SYSTEM :
ECO Mode Control . . . . . . . . . . . .
AUTOMATIC AIR CONDITIONING SYSTEM : A/
C-Heater Timer (Climate Ctrl. Timer) . . . . .
AUTOMATIC AIR CONDITIONING SYSTEM :
Door Motor Starting Position Reset . . . . . ...
AUTOMATIC AIR CONDITIONING SYSTEM :
Fail-safe . . . . . . . . . . . . . . . .
OPERATION . . . . . . . . . . . . . .
Description . . . . . . . . . . . . . . .
Switch Name and Function . . . . . . . . ...
DIAGNOSIS SYSTEM (A/C AUTO AMP.) . ...
Description . . . . . . . . . . . . . . .
CONSULT Function . . . . . . . . . . . ..
ECU DIAGNOSIS INFORMATION . . .
A/C AUTO AMP. . . . . . . . . . . . ...
Reference Value . . . . . . . . . . . . ...
Fail-safe . . . . . . . . . . . . . . . . .
DTC Index . . . . . . . . . . . . . . . .
WIRING DIAGRAM . . . . . . . . .
AUTOMATIC AIR CONDITIONING SYSTEM .
Wiring Diagram . . . . . . . . . . . . . ..
BASIC INSPECTION . . . . . . . . .
DIAGNOSIS AND REPAIR WORK FLOW . .
Work Flow . . . . . . . . . . . . . . . ..
OPERATION INSPECTION . . . . . . .
Work Procedure . . . . . . . . . . . . . .
ADDITIONAL SERVICE WHEN REPLACING
CONTROL UNIT (A/C AUTO AMP.) . . . ...
Description . . . . . . . . . . . . . . . .
Work Procedure . . . . . . . . . . . . . .
CONFIGURATION (HVAC) . . . . . . . .
Description . . . . . . . . . . . . . . . .
Work Procedure . . . . . . . . . . . . . .
Configuration List . . . . . . . . . . . . ...
SYSTEM SETTING . . . . . . . . . . .
Temperature Setting Trimmer . . . . . . . ...
Inlet Port Memory Function (REC) . . . . . .
Inlet Port Memory Function (FRE) . . . . . . .
Foot Position Setting Trimmer . . . . . . . ...
Compressor Operation Setting at Defroster Mode
(Timer/Remote Climate Control) . . . . . . .
Setting of Compressor Maximum Rotation Speed
During Pre Air Conditioning . . . . . . . . ...
Setting of Compressor Maximum Rotation Speed
During Idling . . . . . . . . . . . . . . ..
DOOR MOTOR STARTING POSITION RE-
SET . . . . . . . . . . . . . . . . ..
Description . . . . . . . . . . . . . . . .
Work Procedure . . . . . . . . . . . . . .
DTC/CIRCUIT DIAGNOSIS . . . . . ...
U1000 CAN COMM CIRCUIT . . . . . . .
Description . . . . . . . . . . . . . . . .
DTC Logic . . . . . . . . . . . . . . . ..
Diagnosis Procedure . . . . . . . . . . . .
U1010 CONTROL UNIT (CAN) . . . . . ...
Description . . . . . . . . . . . . . . . .
DTC Logic . . . . . . . . . . . . . . . ..
Diagnosis Procedure . . . . . . . . . . . .
B2578, B2579 IN-VEHICLE SENSOR . . .
DTC Logic . . . . . . . . . . . . . . . ..
Diagnosis Procedure . . . . . . . . . . . .
Component Inspection . . . . . . . . . . ...
B257B, B257C AMBIENT SENSOR . . . ...
HAC-6
Diagnosis Procedure . . . . . . . . . . . .
Component Inspection . . . . . . . . . . ...
B2581, B2582 INTAKE SENSOR . . . . .
DTC Logic . . . . . . . . . . . . . . . ..
Diagnosis Procedure . . . . . . . . . . . .
Component Inspection . . . . . . . . . . ...
B2630, B2631 SUNLOAD SENSOR . . . ...
DTC Logic . . . . . . . . . . . . . . . ..
Diagnosis Procedure . . . . . . . . . . . .
B2770, B2773, B2774 PTC HEATER . . . ..
DTC Logic . . . . . . . . . . . . . . . ..
Diagnosis Procedure . . . . . . . . . . . .
B2771 PTC HEATER . . . . . . . . . ...
DTC Logic . . . . . . . . . . . . . . . ..
Diagnosis Procedure . . . . . . . . . . . .
B2772 PTC HEATER . . . . . . . . . ...
DTC Logic . . . . . . . . . . . . . . . ..
Diagnosis Procedure . . . . . . . . . . . .
B2777, B2779, B277B PTC HEATER . . . .
DTC Logic . . . . . . . . . . . . . . . ..
Diagnosis Procedure . . . . . . . . . . . .
B2780 ELECTRIC COMPRESSOR . . . . .
DTC Logic . . . . . . . . . . . . . . . ..
Diagnosis Procedure . . . . . . . . . . . .
B2781 ELECTRIC COMPRESSOR . . . . .
DTC Logic . . . . . . . . . . . . . . . ..
Diagnosis Procedure . . . . . . . . . . . .
B2782 ELECTRIC COMPRESSOR . . . . .
DTC Logic . . . . . . . . . . . . . . . ..
Diagnosis Procedure . . . . . . . . . . . .
B2783, B2784 ELECTRIC COMPRESSOR .
DTC Logic . . . . . . . . . . . . . . . ..
Diagnosis Procedure . . . . . . . . . . . .
B2785, B2786 ELECTRIC COMPRESSOR .
DTC Logic . . . . . . . . . . . . . . . ..
Diagnosis Procedure . . . . . . . . . . . .
B2787 ELECTRIC COMPRESSOR . . . . .
DTC Logic . . . . . . . . . . . . . . . ..
Diagnosis Procedure . . . . . . . . . . . .
B2788 ELECTRIC COMPRESSOR . . . . .
DTC Logic . . . . . . . . . . . . . . . ..
Diagnosis Procedure . . . . . . . . . . . .
B2789 ELECTRIC COMPRESSOR . . . . .
DTC Logic . . . . . . . . . . . . . . . ..
Diagnosis Procedure . . . . . . . . . . . .
B278A, B278B ELECTRIC COMPRESSOR ...
DTC Logic . . . . . . . . . . . . . . . ..
Diagnosis Procedure . . . . . . . . . . . .
B278C, B278D ELECTRIC COMPRESSOR .
DTC Logic . . . . . . . . . . . . . . . .
Diagnosis Procedure . . . . . . . . . . . .
B2791 ELECTRIC COMPRESSOR . . . . ..
DTC Logic . . . . . . . . . . . . . . . .
Diagnosis Procedure . . . . . . . . . . . .
B27A0, B27A1 INTAKE DOOR MOTOR . . .
DTC Logic . . . . . . . . . . . . . . . .
Diagnosis Procedure . . . . . . . . . . . .
Component Inspection (PBR) . . . . . . . ...
Component Inspection (Motor) . . . . . . . .
B27A2, B27A3, B27A4, B27A5 AIR MIX
DOOR MOTOR . . . . . . . . . . . . .
DTC Logic . . . . . . . . . . . . . . . .
Diagnosis Procedure . . . . . . . . . . . .
Component Inspection . . . . . . . . . . ..
B27A6, B27A7, B27A8, B27A9 MODE DOOR
MOTOR . . . . . . . . . . . . . . . .
DTC Logic . . . . . . . . . . . . . . . .
Diagnosis Procedure . . . . . . . . . . . .
Component Inspection . . . . . . . . . . ..
B27C2, B27C3 PTC HEATER OUTLET AIR
TEMPERATURE SENSOR . . . . . . . ...
DTC Logic . . . . . . . . . . . . . . . .
Diagnosis Procedure . . . . . . . . . . . .
Component Inspection . . . . . . . . . . ..
B27C4, B27C5 A/C UNIT CASE TEMPERA-
TURE SENSOR . . . . . . . . . . . .
DTC Logic . . . . . . . . . . . . . . . .
Diagnosis Procedure . . . . . . . . . . . .
Component Inspection . . . . . . . . . . ..
B27FF A/C AUTO AMP. . . . . . . . . ...
DTC Logic . . . . . . . . . . . . . . . .
Diagnosis Procedure . . . . . . . . . . . .
POWER SUPPLY AND GROUND CIRCUIT .
A/C AUTO AMP. . . . . . . . . . . . . . ..
A/C AUTO AMP. : Diagnosis Procedure . . . ...
BLOWER MOTOR . . . . . . . . . . .
Component Function Check . . . . . . . . .
Diagnosis Procedure . . . . . . . . . . . .
Component Inspection (Blower Motor) . . . . .
Component Inspection (Blower Relay) . . . . .
ELECTRIC COMPRESSOR INSULATION
RESISTANCE CHECK . . . . . . . . . .
Component Inspection . . . . . . . . . . ..
PTC HEATER INSPECTION RESISTANCE
CHECK . . . . . . . . . . . . . . . .
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