Qashqai J11. Heater & Air conditioning Control System — part 1
HAC-1
VENTILATION, HEATER & AIR CONDITIONER
C
D
E
F
G
H
J
K
L
M
SECTION
HAC
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HAC
N
O
P
CONTENTS
HEATER & AIR CONDITIONING CONTROL SYSTEM
AUTOMATIC AIR CONDITIONING
PRECAUTION . . . . . . . . . . . ...
PRECAUTIONS . . . . . . . . . . . . ...
Precautions for Removing Battery Terminal . . .....
SYSTEM DESCRIPTION . . . . . . . ..
COMPONENT PARTS . . . . . . . . . .
AUTOMATIC AIR CONDITIONING SYSTEM . . .....
AUTOMATIC AIR CONDITIONING SYSTEM :
Component Parts Location . . . . . . . . . ....
PTC HEATER CONTROL SYSTEM . . . . . . ..
PTC HEATER CONTROL SYSTEM : Component
Parts Location . . . . . . . . . . . . . . .
STOP/START SYSTEM . . . . . . . . . . . .
STOP/START SYSTEM : Component Parts Loca-
tion . . . . . . . . . . . . . . . . . . ..
A/C UNIT ASSEMBLY . . . . . . . . . . . ...
A/C UNIT ASSEMBLY : Aspirator . . . . . . ...
A/C UNIT ASSEMBLY : Intake Sensor . . . . ...
A/C UNIT ASSEMBLY : Air Mix Door Motor (Driver
Side) . . . . . . . . . . . . . . . . . .
A/C UNIT ASSEMBLY : Air Mix Door Motor (Pas-
senger Side) . . . . . . . . . . . . . . .
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 UNIT ASSEMBLY : PTC Heater . . . . . ..
COMPRESSOR . . . . . . . . . . . . . . .
COMPRESSOR : Magnet Clutch . . . . . . .
COMPRESSOR : ECV (Electrical Control Valve) .
A/C Control . . . . . . . . . . . . . . . ..
A/C Auto Amp. . . . . . . . . . . . . . . .
Ambient Sensor . . . . . . . . . . . . . ...
In-vehicle Sensor . . . . . . . . . . . . . .
Sunload Sensor . . . . . . . . . . . . . ...
Refrigerant Pressure Sensor . . . . . . . . ...
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 :
Compressor Control . . . . . . . . . . . .
AUTOMATIC AIR CONDITIONING SYSTEM :
Door Control . . . . . . . . . . . . . . .
AUTOMATIC AIR CONDITIONING SYSTEM :
Cooling Fan Control . . . . . . . . . . . . .
AUTOMATIC AIR CONDITIONING SYSTEM :
Door Motor Starting Position Reset Control . . .
AUTOMATIC AIR CONDITIONING SYSTEM :
Fail-safe . . . . . . . . . . . . . . . . ...
PTC HEATER CONTROL SYSTEM . . . . . . ..
PTC HEATER CONTROL SYSTEM : System De-
scription . . . . . . . . . . . . . . . . ...
STOP/START SYSTEM . . . . . . . . . . . .
STOP/START SYSTEM : System Description . .
OPERATION . . . . . . . . . . . . . .
Switch Name and Function . . . . . . . . . ..
DIAGNOSIS SYSTEM (A/C AUTO AMP.) . .
HAC-2
CONSULT Function . . . . . . . . . . . ....
DIAGNOSIS SYSTEM (A/C CONTROL) . . ...
Diagnosis Description . . . . . . . . . . . .
DIAGNOSIS SYSTEM (BCM) . . . . . . .
COMMON ITEM . . . . . . . . . . . . . ....
COMMON ITEM : CONSULT Function (BCM -
COMMON ITEM) . . . . . . . . . . . . ....
AIR CONDITIONER . . . . . . . . . . . . ..
AIR CONDITIONER : CONSULT Function (BCM -
AIR CONDITIONER) . . . . . . . . . . . ..
ECU DIAGNOSIS INFORMATION . . . ..
A/C AUTO AMP. . . . . . . . . . . . .
Reference Value . . . . . . . . . . . . . .
Fail-safe . . . . . . . . . . . . . . . . ..
DTC Index . . . . . . . . . . . . . . . ..
BCM, ECM, IPDM E/R . . . . . . . . . ...
List of ECU Reference . . . . . . . . . . ....
WIRING DIAGRAM . . . . . . . . . .
AUTOMATIC AIR CONDITIONING SYSTEM ...
Wiring Diagram . . . . . . . . . . . . . ...
BASIC INSPECTION . . . . . . . . ...
DIAGNOSIS AND REPAIR WORK FLOW . .
Work Flow . . . . . . . . . . . . . . . ...
OPERATION INSPECTION . . . . . . . ...
Work Procedure . . . . . . . . . . . . . ..
SYSTEM SETTING . . . . . . . . . . .
Temperature Setting Trimmer . . . . . . . ....
Inlet Port Memory Function (REC) . . . . . . .
Inlet Port Memory Function (FRE) . . . . . . ..
Setting of Target Evaporator Temperature Upper
Limit Value . . . . . . . . . . . . . . . ..
DOOR MOTOR STARTING POSITION RE-
SET . . . . . . . . . . . . . . . . .
Description . . . . . . . . . . . . . . . ..
Work Procedure . . . . . . . . . . . . . ..
DTC/CIRCUIT DIAGNOSIS . . . . . . .
U1000 CAN COMM CIRCUIT . . . . . . .
Description . . . . . . . . . . . . . . . ..
DTC Logic . . . . . . . . . . . . . . . ...
Diagnosis Procedure . . . . . . . . . . . ..
B24A0 A/C AUTO AMP. . . . . . . . . .
DTC Logic . . . . . . . . . . . . . . . ...
Diagnosis Procedure . . . . . . . . . . . ..
B24A1 A/C AUTO AMP. POWER SUPPLY . ..
DTC Logic . . . . . . . . . . . . . . . ...
Diagnosis Procedure . . . . . . . . . . . ...
B24A4 INTAKE SENSOR . . . . . . . . .
DTC Logic . . . . . . . . . . . . . . . ...
Diagnosis Procedure . . . . . . . . . . . ...
Component Inspection . . . . . . . . . . .
B24A6 IN-VEHICLE SENSOR . . . . . . ..
DTC Logic . . . . . . . . . . . . . . . ...
Diagnosis Procedure . . . . . . . . . . . ...
Component Inspection . . . . . . . . . . .
B24A9 SUNLOAD SENSOR . . . . . . . .
DTC Logic . . . . . . . . . . . . . . . ...
Diagnosis Procedure . . . . . . . . . . . ...
B24B4 A/C CONTROL . . . . . . . . . ..
DTC Logic . . . . . . . . . . . . . . . ...
Diagnosis Procedure . . . . . . . . . . . ...
B24B7 INTAKE DOOR MOTOR . . . . . ...
DTC Logic . . . . . . . . . . . . . . . ...
Diagnosis Procedure . . . . . . . . . . . ...
Component Inspection . . . . . . . . . . .
B24B9 MODE DOOR MOTOR . . . . . . ..
DTC Logic . . . . . . . . . . . . . . . ...
Diagnosis Procedure . . . . . . . . . . . ...
Component Inspection . . . . . . . . . . .
B24BB LEFT AIR MIX DOOR MOTOR . . . .
DTC Logic . . . . . . . . . . . . . . . ...
Diagnosis Procedure . . . . . . . . . . . ...
Component Inspection . . . . . . . . . . ..
B24BD RIGHT AIR MIX DOOR MOTOR . . .
DTC Logic . . . . . . . . . . . . . . . .
Diagnosis Procedure . . . . . . . . . . . .
Component Inspection . . . . . . . . . . ..
B24D4 A/C CONTROL COMMUNICATION . .
DTC Logic . . . . . . . . . . . . . . . .
Diagnosis Procedure . . . . . . . . . . . .
POWER SUPPLY AND GROUND CIRCUIT .
A/C AUTO AMP. . . . . . . . . . . . . . ..
A/C AUTO AMP. : Diagnosis Procedure . . . ...
A/C CONTROL . . . . . . . . . . . . . .
A/C CONTROL : Diagnosis Procedure . . . . .
BLOWER MOTOR . . . . . . . . . . .
Diagnosis Procedure . . . . . . . . . . . .
Component Inspection (Blower Motor) . . . . .
Component Inspection (Blower Relay) . . . . .
MAGNET CLUTCH . . . . . . . . . . ...
Component Function Check . . . . . . . . .
Diagnosis Procedure . . . . . . . . . . . .
ECV (ELECTRICAL CONTROL VALVE) . . .
HAC-3
C
D
E
F
G
H
J
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M
A
B
HAC
N
O
P
Component Inspection . . . . . . . . . . ..
PTC HEATER . . . . . . . . . . . . ...
Component Function Check . . . . . . . . ..
Diagnosis Procedure . . . . . . . . . . . .
Component Inspection (PTC Relay) . . . . . .
Component Inspection (PTC Heater) . . . . .
SYMPTOM DIAGNOSIS . . . . . . .
AUTOMATIC AIR CONDITIONER 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 . . . . . . . . . . . . .
Exploded View . . . . . . . . . . . . . ..
Removal and Installation . . . . . . . . . ...
A/C AUTO AMP. . . . . . . . . . . . ...
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 . . . . . . . . . ...
REFRIGERANT PRESSURE SENSOR . . ...
Exploded View . . . . . . . . . . . . . ..
Removal and Installation . . . . . . . . . ...
PTC HEATER . . . . . . . . . . . . ...
Removal and Installation . . . . . . . . . ...
POWER TRANSISTOR . . . . . . . . .
Exploded View . . . . . . . . . . . . . ..
Removal and Installation . . . . . . . . . ...
DOOR MOTOR . . . . . . . . . . . . .
Exploded View . . . . . . . . . . . . . ..
AIR MIX DOOR MOTOR . . . . . . . . . . .
AIR MIX DOOR MOTOR : Removal and Installa-
tion . . . . . . . . . . . . . . . . . . .
INTAKE DOOR MOTOR . . . . . . . . . . ..
INTAKE DOOR MOTOR : Removal and Installa-
tion . . . . . . . . . . . . . . . . . . .
MODE DOOR MOTOR . . . . . . . . . . . .
MODE DOOR MOTOR : Removal and Installation ..
MANUAL AIR CONDITIONING
PRECAUTION . . . . . . . . . . .
PRECAUTIONS . . . . . . . . . . . ...
Precautions for Removing Battery Terminal . . ..
SYSTEM DESCRIPTION . . . . . . ...
COMPONENT PARTS . . . . . . . . .
MANUAL AIR CONDITIONING SYSTEM . . . ...
MANUAL AIR CONDITIONING SYSTEM : Com-
ponent Parts Location . . . . . . . . . . .
PTC HEATER CONTROL SYSTEM . . . . . .
PTC HEATER CONTROL SYSTEM : Component
Parts Location . . . . . . . . . . . . . .
A/C UNIT ASSEMBLY . . . . . . . . . . . .
A/C UNIT ASSEMBLY : Intake 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 : Fan Control Amp. . . .
A/C UNIT ASSEMBLY : PTC Heater . . . . . .
COMPRESSOR . . . . . . . . . . . . . .
COMPRESSOR : Magnet Clutch . . . . . . ..
COMPRESSOR : ECV (Electrical Control Valve) ..
A/C Control (A/C Amp.) . . . . . . . . . . .
Ambient Sensor . . . . . . . . . . . . . .
Refrigerant Pressure Sensor . . . . . . . . .
SYSTEM . . . . . . . . . . . . . . ..
MANUAL AIR CONDITIONING SYSTEM . . . ...
MANUAL AIR CONDITIONING SYSTEM : Sys-
tem Description . . . . . . . . . . . . . ..
MANUAL AIR CONDITIONING SYSTEM : Air In-
let Control . . . . . . . . . . . . . . . ..
MANUAL AIR CONDITIONING SYSTEM : Com-
pressor Control . . . . . . . . . . . . . ..
MANUAL AIR CONDITIONING SYSTEM : Door
Control . . . . . . . . . . . . . . . . ...
MANUAL AIR CONDITIONING SYSTEM : Cool-
ing Fan Control . . . . . . . . . . . . . ..
MANUAL AIR CONDITIONING SYSTEM : Door
Motor Starting Position Reset Control . . . . ...
HAC-4
PTC HEATER CONTROL SYSTEM . . . . . .
PTC HEATER CONTROL SYSTEM : System De-
scription . . . . . . . . . . . . . . . . .
OPERATION . . . . . . . . . . . . .
Switch Name and Function . . . . . . . . .
DIAGNOSIS SYSTEM (A/C AMP.) . . . . ..
Description . . . . . . . . . . . . . . . .
CONSULT Function . . . . . . . . . . . ...
DIAGNOSIS SYSTEM (BCM) . . . . . . ..
COMMON ITEM . . . . . . . . . . . . . ...
COMMON ITEM : CONSULT Function (BCM -
COMMON ITEM) . . . . . . . . . . . . ...
AIR CONDITIONER . . . . . . . . . . . . .
AIR CONDITIONER : CONSULT Function (BCM -
AIR CONDITIONER) . . . . . . . . . . . .
ECU DIAGNOSIS INFORMATION . . . .
A/C AMP. . . . . . . . . . . . . . . .
Reference Value . . . . . . . . . . . . .
DTC Index . . . . . . . . . . . . . . . .
BCM, ECM, IPDM E/R . . . . . . . . . .
List of ECU Reference . . . . . . . . . . ...
WIRING DIAGRAM . . . . . . . . .
MANUAL AIR CONDITIONER SYSTEM . . .
Wiring Diagram . . . . . . . . . . . . . ..
BASIC INSPECTION . . . . . . . . ..
DIAGNOSIS AND REPAIR WORK FLOW . ..
Work Flow . . . . . . . . . . . . . . . ..
OPERATION INSPECTION . . . . . . . .
Work Procedure . . . . . . . . . . . . . .
SYSTEM SETTING . . . . . . . . . . ..
Setting of Target Evaporator Temperature Upper
Limit Value . . . . . . . . . . . . . . . .
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 . . . . . . . . . . . .
B24A4 INTAKE SENSOR . . . . . . . .
DTC Logic . . . . . . . . . . . . . . . .
Diagnosis Procedure . . . . . . . . . . . .
Component Inspection . . . . . . . . . . ..
B24B7 INTAKE DOOR MOTOR . . . . . ..
DTC Logic . . . . . . . . . . . . . . . .
Diagnosis Procedure . . . . . . . . . . . .
Component Inspection . . . . . . . . . . ..
B24B9 MODE DOOR MOTOR . . . . . . .
DTC Logic . . . . . . . . . . . . . . . .
Diagnosis Procedure . . . . . . . . . . . .
Component Inspection . . . . . . . . . . ..
B24BB LEFT AIR MIX DOOR MOTOR . . .
DTC Logic . . . . . . . . . . . . . . . .
Diagnosis Procedure . . . . . . . . . . . .
Component Inspection . . . . . . . . . . ..
POWER SUPPLY AND GROUND CIRCUIT .
A/C AMP. . . . . . . . . . . . . . . . . .
A/C AMP. : Diagnosis Procedure . . . . . . ..
BLOWER MOTOR . . . . . . . . . . .
Diagnosis Procedure . . . . . . . . . . . .
Component Inspection (Blower Motor) . . . . .
Component Inspection (Blower Relay) . . . . .
Component Inspection (Fan Control Amp.) . . ..
MAGNET CLUTCH . . . . . . . . . . ...
Component Function Check . . . . . . . . .
Diagnosis Procedure . . . . . . . . . . . .
ECV (ELECTRICAL CONTROL VALVE) . . .
Diagnosis Procedure . . . . . . . . . . . .
Component Inspection . . . . . . . . . . ..
PTC HEATER . . . . . . . . . . . . ...
Component Function Check . . . . . . . . .
Diagnosis Procedure . . . . . . . . . . . .
Component Inspection (PTC Relay) . . . . . .
Component Inspection (PTC Heater) . . . . .
SYMPTOM DIAGNOSIS . . . . . . ...
MANUAL AIR CONDITIONING SYSTEM . .
Symptom Table . . . . . . . . . . . . . .
INSUFFICIENT COOLING . . . . . . . .
Description . . . . . . . . . . . . . . .
Diagnosis Procedure . . . . . . . . . . . .
INSUFFICIENT HEATING . . . . . . . .
Description . . . . . . . . . . . . . . .
Diagnosis Procedure . . . . . . . . . . . .
COMPRESSOR DOES NOT OPERATE . . ..
Description . . . . . . . . . . . . . . .
HAC-5
C
D
E
F
G
H
J
K
L
M
A
B
HAC
N
O
P
REMOVAL AND INSTALLATION . . . .
A/C CONTROL (A/C AUTO AMP.) . . . . ..
Exploded View . . . . . . . . . . . . . ..
Removal and Installation . . . . . . . . . ...
AMBIENT SENSOR . . . . . . . . . . .
Removal and Installation . . . . . . . . . ...
INTAKE SENSOR . . . . . . . . . . .
Exploded View . . . . . . . . . . . . . ..
Removal and Installation . . . . . . . . . ...
REFRIGERANT PRESSURE SENSOR . . ...
Exploded View . . . . . . . . . . . . . ..
Removal and Installation . . . . . . . . . ...
PTC HEATER . . . . . . . . . . . . ...
Removal and Installation . . . . . . . . . ...
FAN CONTROL AMPLIFIER . . . . . . ...
Exploded View . . . . . . . . . . . . . ..
Removal and Installation . . . . . . . . . ...
DOOR MOTOR . . . . . . . . . . . . .
Exploded View . . . . . . . . . . . . . ..
AIR MIX DOOR MOTOR . . . . . . . . . . .
AIR MIX DOOR MOTOR : Removal and Installa-
tion . . . . . . . . . . . . . . . . . .
INTAKE DOOR MOTOR . . . . . . . . . . ..
INTAKE DOOR MOTOR : Removal and Installa-
tion . . . . . . . . . . . . . . . . . .
MODE DOOR MOTOR . . . . . . . . . . .
MODE DOOR MOTOR : Removal and Installation
MANUAL HEATER
PRECAUTION . . . . . . . . . . .
PRECAUTIONS . . . . . . . . . . . .
Precautions for Removing Battery Terminal . . .
SYSTEM DESCRIPTION . . . . . . ...
COMPONENT PARTS . . . . . . . . . .
MANUAL HEATER SYSTEM . . . . . . . . ..
MANUAL HEATER SYSTEM : Component Parts
Location . . . . . . . . . . . . . . . . .
PTC HEATER CONTROL SYSTEM . . . . . .
PTC HEATER CONTROL SYSTEM : Component
Parts Location . . . . . . . . . . . . . ...
A/C UNIT ASSEMBLY . . . . . . . . . . . .
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 : Fan Control Amp. . . .
A/C UNIT ASSEMBLY : PTC Heater . . . . . .
Heater Control (A/C Amp.) . . . . . . . . .
Ambient Sensor . . . . . . . . . . . . . .
SYSTEM . . . . . . . . . . . . . . ..
MANUAL HEATER SYSTEM . . . . . . . . ..
MANUAL HEATER SYSTEM : System Descrip-
tion . . . . . . . . . . . . . . . . . . .
MANUAL HEATER SYSTEM : Air Inlet Control .
MANUAL HEATER SYSTEM : Door Control . . .
MANUAL HEATER SYSTEM : Door Motor Start-
ing Position Reset Control . . . . . . . . . .
PTC HEATER CONTROL SYSTEM . . . . . .
PTC HEATER CONTROL SYSTEM : System De-
scription . . . . . . . . . . . . . . . . .
OPERATION . . . . . . . . . . . . ...
Switch Name and Function . . . . . . . . .
DIAGNOSIS SYSTEM (A/C AMP.) . . . . .
Description . . . . . . . . . . . . . . . .
CONSULT Function . . . . . . . . . . . ...
DIAGNOSIS SYSTEM (BCM) . . . . . . .
COMMON ITEM . . . . . . . . . . . . . ...
COMMON ITEM : CONSULT Function (BCM -
COMMON ITEM) . . . . . . . . . . . . ...
AIR CONDITIONER . . . . . . . . . . . . .
AIR CONDITIONER : CONSULT Function (BCM -
AIR CONDITIONER) . . . . . . . . . . . .
ECU DIAGNOSIS INFORMATION . . .
A/C AMP. . . . . . . . . . . . . . . .
Reference Value . . . . . . . . . . . . .
DTC Index . . . . . . . . . . . . . . . .
BCM, ECM, IPDM E/R . . . . . . . . . .
List of ECU Reference . . . . . . . . . . ...
WIRING DIAGRAM . . . . . . . . .
MANUAL HEATER SYSTEM . . . . . . ..
Wiring Diagram . . . . . . . . . . . . . ..
BASIC INSPECTION . . . . . . . . .
DIAGNOSIS AND REPAIR WORK FLOW . .
Work Flow . . . . . . . . . . . . . . . ..
OPERATION INSPECTION . . . . . . .
Work Procedure . . . . . . . . . . . . . .
DOOR MOTOR STARTING POSITION RE-
SET . . . . . . . . . . . . . . . . ..
Description . . . . . . . . . . . . . . . .
HAC-6
DTC/CIRCUIT DIAGNOSIS . . . . . .
U1000 CAN COMM CIRCUIT . . . . . . ..
Description . . . . . . . . . . . . . . . .
DTC Logic . . . . . . . . . . . . . . . ..
Diagnosis Procedure . . . . . . . . . . . .
U1010 CONTROL UNIT (CAN) . . . . . ...
Description . . . . . . . . . . . . . . . .
DTC Logic . . . . . . . . . . . . . . . ..
Diagnosis Procedure . . . . . . . . . . . .
B24B7 INTAKE DOOR MOTOR . . . . . ..
DTC Logic . . . . . . . . . . . . . . . ..
Diagnosis Procedure . . . . . . . . . . . .
Component Inspection . . . . . . . . . . ...
B24B9 MODE DOOR MOTOR . . . . . .
DTC Logic . . . . . . . . . . . . . . . ..
Diagnosis Procedure . . . . . . . . . . . .
Component Inspection . . . . . . . . . . ...
B24BB LEFT AIR MIX DOOR MOTOR . . ...
DTC Logic . . . . . . . . . . . . . . . ..
Diagnosis Procedure . . . . . . . . . . . .
Component Inspection . . . . . . . . . . ...
POWER SUPPLY AND GROUND CIRCUIT ...
A/C AMP. . . . . . . . . . . . . . . . . ..
A/C AMP. : Diagnosis Procedure . . . . . . ..
BLOWER MOTOR . . . . . . . . . . ...
Diagnosis Procedure . . . . . . . . . . . .
Component Inspection (Blower Motor) . . . . ..
Component Inspection (Blower Relay) . . . . ..
Component Inspection (Fan Control Amp.) . . ...
PTC HEATER . . . . . . . . . . . . ..
Component Function Check . . . . . . . . ..
Diagnosis Procedure . . . . . . . . . . . .
Component Inspection (PTC Relay) . . . . . .
Component Inspection (PTC Heater) . . . . .
SYMPTOM DIAGNOSIS . . . . . . ...
MANUAL HEATER SYSTEM . . . . . . ...
Symptom Table . . . . . . . . . . . . . .
INSUFFICIENT HEATING . . . . . . . .
Description . . . . . . . . . . . . . . .
Diagnosis Procedure . . . . . . . . . . . .
REMOVAL AND INSTALLATION . . . .
HEATER CONTROL (A/C AMP.) . . . . . .
Exploded View . . . . . . . . . . . . . ..
Removal and Installation . . . . . . . . . ...
AMBIENT SENSOR . . . . . . . . . . ..
Removal and Installation . . . . . . . . . ...
PTC HEATER . . . . . . . . . . . . ...
Removal and Installation . . . . . . . . . ...
FAN CONTROL AMPLIFIER . . . . . . .
Exploded View . . . . . . . . . . . . . ..
Removal and Installation . . . . . . . . . ...
DOOR MOTOR . . . . . . . . . . . . .
Exploded View . . . . . . . . . . . . . ..
AIR MIX DOOR MOTOR . . . . . . . . . . .
AIR MIX DOOR MOTOR : Removal and Installa-
tion . . . . . . . . . . . . . . . . . .
INTAKE DOOR MOTOR . . . . . . . . . . .
INTAKE DOOR MOTOR : Removal and Installa-
tion . . . . . . . . . . . . . . . . . .
MODE DOOR MOTOR . . . . . . . . . . .
PRECAUTIONS
HAC-7
< PRECAUTION >
[AUTOMATIC AIR CONDITIONING]
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PRECAUTION
PRECAUTIONS
Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT
PRE-TENSIONER"
INFOID:0000000010432151
The Supplemental Restraint System such as “AIR BAG” and “SEAT BELT PRE-TENSIONER”, used along
with a front seat belt, helps to reduce the risk or severity of injury to the driver and front passenger for certain
types of collision. Information necessary to service the system safely is included in the “SRS AIR BAG” and
“SEAT BELT” of this Service Manual.
WARNING:
Always observe the following items for preventing accidental activation.
• To avoid rendering the SRS inoperative, which could increase the risk of personal injury or death in
the event of a collision that would result in air bag inflation, all maintenance must be performed by
an authorized NISSAN/INFINITI dealer.
• Improper maintenance, including incorrect removal and installation of the SRS, can lead to personal
injury caused by unintentional activation of the system. For removal of Spiral Cable and Air Bag
Module, see “SRS AIR BAG”.
• Never use electrical test equipment on any circuit related to the SRS unless instructed to in this Ser-
vice Manual. SRS wiring harnesses can be identified by yellow and/or orange harnesses or harness
connectors.
PRECAUTIONS WHEN USING POWER TOOLS (AIR OR ELECTRIC) AND HAMMERS
WARNING:
Always observe the following items for preventing accidental activation.
• When working near the Air Bag Diagnosis Sensor Unit or other Air Bag System sensors with the
ignition ON or engine running, never use air or electric power tools or strike near the sensor(s) with
a hammer. Heavy vibration could activate the sensor(s) and deploy the air bag(s), possibly causing
serious injury.
• When using air or electric power tools or hammers, always switch the ignition OFF, disconnect the
battery, and wait at least 3 minutes before performing any service.
Precautions for Removing Battery Terminal
INFOID:0000000010521162
• With the adoption of Auto ACC function, ACC power is automatically supplied by operating the intelligent key
or remote keyless entry or by opening/closing the driver side door. In addition, ACC power is supplied even
after the ignition switch is turned to the OFF position, i.e. ACC power is supplied for a certain fixed time.
• When disconnecting the 12V battery terminal, turn off the ACC
power before disconnecting the 12V battery terminal, observing
“How to disconnect 12V battery terminal” described below.
NOTE:
Some ECUs operate for a certain fixed time even after ignition
switch is turned OFF and ignition power supply is stopped. If the
battery terminal is disconnected before ECU stops, accidental DTC
detection or ECU data damage may occur.
• For vehicles with the 2-batteries, be sure to connect the main bat-
tery and the sub battery before turning ON the ignition switch.
NOTE:
If the ignition switch is turned ON with any one of the terminals of
main battery and sub battery disconnected, then DTC may be detected.
• After installing the 12V battery, always check "Self Diagnosis Result" of all ECUs and erase DTC.
NOTE:
The removal of 12V battery may cause a DTC detection error.
HOW TO DISCONNECT 12V BATTERY TERMINAL
Disconnect 12V battery terminal according to instruction described below.
1.
Open the hood.
2.
Turn ignition switch to the ON position.
3.
Turn ignition switch to the OFF position with the driver side door opened.
4.
Get out of the vehicle and close the driver side door.
SEF289H
HAC-8
< PRECAUTION >
[AUTOMATIC AIR CONDITIONING]
PRECAUTIONS
5.
Wait at least 3 minutes. For vehicle with the engine listed below, remove the battery terminal after a lapse
of the specified time.
CAUTION:
While waiting, never operate the vehicle such as locking, opening, and closing doors. Violation of
this caution results in the activation of ACC power supply according to the Auto ACC function.
6.
Remove 12V battery terminal.
CAUTION:
After installing 12V battery, always check self-diagnosis results of all ECUs and erase DTC.
D4D engine
: 20 minutes
HRA2DDT
: 12 minutes
K9K engine
: 4 minutes
M9R engine
: 4 minutes
R9M engine
: 4 minutes
V9X engine
: 4 minutes
COMPONENT PARTS
HAC-9
< SYSTEM DESCRIPTION >
[AUTOMATIC AIR CONDITIONING]
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SYSTEM DESCRIPTION
COMPONENT PARTS
AUTOMATIC AIR CONDITIONING SYSTEM
AUTOMATIC AIR CONDITIONING SYSTEM : Component Parts Location
INFOID:0000000010432153
Left side of A/C unit assembly
Right side of A/C unit assembly
JMIIA3541ZZ
HAC-10
< SYSTEM DESCRIPTION >
[AUTOMATIC AIR CONDITIONING]
COMPONENT PARTS
PTC HEATER CONTROL SYSTEM
No.
Component
Function
Compressor
Magnet clutch
HAC-18, "COMPRESSOR : Magnet Clutch"
ECV (electrical control
valve)
HAC-18, "COMPRESSOR : ECV (Electrical Control Valve)"
Refrigerant pressure sensor
HAC-19, "Refrigerant Pressure Sensor"
Ambient sensor
IPDM E/R
A/C relay is integrated in IPDM E/R. IPDM E/R operates A/C relay when
receiving A/C compressor request signal from ECM via CAN communica-
tion line.
Refer to
PCS-5, "Component Parts Location"
for detailed installation loca-
tion.
ECM
ECM, when receiving A/C ON signal and blower fan ON signal from BCM,
transmits A/C compressor request signal to IPDM E/R via CAN communi-
cation according to status of the engine and refrigerant pressure.
ECM transmits engine coolant temperature signal to combination meter via
CAN communication line.
Refer to
ECH-13, "Component Parts Location"
(HR engine models),
25, "ENGINE CONTROL SYSTEM : Component Parts Location"
(MR16DDT engine models),
ECM-627, "ENGINE CONTROL SYSTEM :
(MR20DD engine models),
(K9K engine models) or
(R9M engine models) for detailed installation location.
Sunload sensor
In-vehicle sensor
Combination meter
Combination meter transmits ambient temperature signal and vehicle
speed signal to A/C auto amp. via CAN communication line.
A/C control
Power transistor
HAC-17, "A/C UNIT ASSEMBLY : Power Transistor"
Intake sensor
HAC-14, "A/C UNIT ASSEMBLY : Intake Sensor"
Air mix door motor (Driver side)
HAC-14, "A/C UNIT ASSEMBLY : Air Mix Door Motor (Driver Side)"
Aspirator
HAC-14, "A/C UNIT ASSEMBLY : Aspirator"
Intake door motor
HAC-16, "A/C UNIT ASSEMBLY : Intake Door Motor"
A/C auto amp.
Air mix door motor (Passenger side)
HAC-15, "A/C UNIT ASSEMBLY : Air Mix Door Motor (Passenger Side)"
Mode door motor
HAC-15, "A/C UNIT ASSEMBLY : Mode Door Motor"
Blower motor
COMPONENT PARTS
HAC-11
< SYSTEM DESCRIPTION >
[AUTOMATIC AIR CONDITIONING]
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PTC HEATER CONTROL SYSTEM : Component Parts Location
INFOID:0000000010499384
Right side of A/C unit assembly
JMIIA3545ZZ
No.
Component
Function
Ambient sensor
PTC relay-1/2/3
PTC relay is controlled by BCM, and supplies power supply to PTC heater.
HAC-12
< SYSTEM DESCRIPTION >
[AUTOMATIC AIR CONDITIONING]
COMPONENT PARTS
STOP/START SYSTEM
ECM
ECM transmits engine speed signal, engine coolant temperature signal,
cooling fan speed request signal, and electrical power cut freeze signal to
BCM via CAN communication line.
Refer to
ECH-13, "Component Parts Location"
(HR engine models),
25, "ENGINE CONTROL SYSTEM : Component Parts Location"
(MR16DDT engine models),
ECM-627, "ENGINE CONTROL SYSTEM :
(MR20DD engine models),
(K9K engine models) or
(R9M engine models) for detailed installation location.
Combination meter
Combination meter transmits ambient temperature signal to BCM via CAN
communication line.
BCM
BCM receives each signals, and controls PTC relay.
BCM transmits idle up signal to ECM according to electrical load condition.
Refer to
BCS-6, "BODY CONTROL SYSTEM : Component Parts Location"
for detailed installation location.
PTC heater
HAC-17, "A/C UNIT ASSEMBLY : PTC Heater"
Blower motor
HAC-17, "A/C UNIT ASSEMBLY : Blower Motor"
No.
Component
Function
COMPONENT PARTS
HAC-13
< SYSTEM DESCRIPTION >
[AUTOMATIC AIR CONDITIONING]
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STOP/START SYSTEM : Component Parts Location
INFOID:0000000010499374
Left side of A/C unit assembly
Right side of A/C unit assembly
JMIIA3544ZZ
HAC-14
< SYSTEM DESCRIPTION >
[AUTOMATIC AIR CONDITIONING]
COMPONENT PARTS
A/C UNIT ASSEMBLY
A/C UNIT ASSEMBLY : Aspirator
INFOID:0000000010432154
The aspirator generates the vacuum by the air blown from the A/C
unit assembly and draws the air of the passenger room to the in-
vehicle sensor area via the aspirator duct.
A/C UNIT ASSEMBLY : Intake Sensor
INFOID:0000000010432155
Intake sensor measures evaporator temperature (through air tem-
perature). The sensor uses a thermistor which is sensitive to the
change in temperature. The electrical resistance of the thermistor
decreases as temperature increases.
A/C UNIT ASSEMBLY : Air Mix Door Motor (Driver Side)
INFOID:0000000010432156
DESCRIPTION
No.
Component
Function
Ambient sensor
Refer to
ECM
ECM transmits engine coolant temperature signal and stop/start status sig-
nal to A/C auto amp. via CAN communication line.
ECM receives stop/start permit signal from A/C auto amp. via CAN commu-
nication line.
Refer to
ECH-13, "Component Parts Location"
(HR engine models),
25, "ENGINE CONTROL SYSTEM : Component Parts Location"
(MR16DDT engine models),
ECK-12, "Component Parts Location"
engine models) or
EC9-14, "Component Parts Location"
(R9M engine
models) for detailed installation location.
Sunload sensor
In-vehicle sensor
Combination meter
Combination meter transmits ambient temperature signal to A/C auto amp.
via CAN communication line.
A/C control
Power transistor
HAC-17, "A/C UNIT ASSEMBLY : Power Transistor"
Intake sensor
HAC-14, "A/C UNIT ASSEMBLY : Intake Sensor"
Intake door motor
HAC-16, "A/C UNIT ASSEMBLY : Intake Door Motor"
A/C auto amp.
Blower motor
HAC-17, "A/C UNIT ASSEMBLY : Blower Motor"
RJIA1804E
JMIIA3561GB
COMPONENT PARTS
HAC-15
< SYSTEM DESCRIPTION >
[AUTOMATIC AIR CONDITIONING]
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• The step motor system is adopted for air mix door motor (driver side).
• When a drive signal is input from A/C auto amp. to door motor, a step motor built into the door motor rotates
according to the drive signal, and then stops at the target door position.
• Rotation of motor is transmitted to air mix door (driver side) by link and lever, then air flow temperature
(driver side) is switched.
AIR MIX DOOR MOTOR (DRIVER SIDE) DRIVE METHOD
• The 4 drive coils are excited in sequence in order to drive the motor.
• Direction of rotation is changeable by recomposing pattern of excitation.
A/C UNIT ASSEMBLY : Air Mix Door Motor (Passenger Side)
INFOID:0000000010432157
DESCRIPTION
• The step motor system is adopted for air mix door motor (passenger side).
• When a drive signal is input from A/C auto amp. to door motor, a step motor built into the door motor rotates
according to the drive signal, and then stops at the target door position.
• Rotation of motor is transmitted to air mix door (passenger side) by link and lever, then air flow temperature
(passenger side) is switched.
AIR MIX DOOR MOTOR (PASSENGER SIDE) DRIVE METHOD
• The 4 drive coils are excited in sequence in order to drive the motor.
• Direction of rotation is changeable by recomposing pattern of excitation.
A/C UNIT ASSEMBLY : Mode Door Motor
INFOID:0000000010432158
DESCRIPTION
• The step motor system is adopted for mode door motor.
• When a drive signal is input from A/C auto amp. to door motor, a step motor built into the door motor rotates
according to the drive signal, and then stops at the target door position.
JMIIA3562GB
JMIIA3563GB
HAC-16
< SYSTEM DESCRIPTION >
[AUTOMATIC AIR CONDITIONING]
COMPONENT PARTS
• Rotation of motor is transmitted to mode door (center ventilator and defroster door, sub defroster door, side
ventilator door, and foot door) by link, rod, and lever, then air outlet is switched.
MODE DOOR MOTOR DRIVE METHOD
• The 4 drive coils are excited in sequence in order to drive the motor.
• Direction of rotation is changeable by recomposing pattern of excitation.
A/C UNIT ASSEMBLY : Intake Door Motor
INFOID:0000000010432159
DESCRIPTION
• The step motor system is adopted for intake door motor.
• When a drive signal is input from A/C auto amp. to door motor, a step motor built into the door motor rotates
according to the drive signal, and then stops at the target door position.
• Rotation of motor is transmitted to intake door by lever, then air inlet is switched.
INTAKE DOOR MOTOR (DRIVER SIDE) DRIVE METHOD
• The 4 drive coils are excited in sequence in order to drive the motor.
• Direction of rotation is changeable by recomposing pattern of excitation.
JMIIA3564GB
JMIIA3565GB
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