Nissan Pathfinder (2011 year). Instruction — part 442
HEATER PUMP
HA-57
< REMOVAL AND INSTALLATION >
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HEATER PUMP
Removal and Installation
INFOID:0000000006243612
Heater Pump
NOTE:
• Only the VQ40DE engine is equipped with a heater pump for the rear heater system.
• When removing components such as hoses, tubes/lines, etc., cap or plug openings to prevent fluid from
spilling.
REMOVAL
1. Partially drain the engine cooling system. Refer to
CO-13, "Changing Engine Coolant"
2. Disconnect the heater pump electrical connector.
3. Disconnect the two heater hoses.
4. Remove the heater pump from the bracket securing the heater pump to the cowl top.
CAUTION:
Do not disassemble the heater pump, replace the heater pump as an assembly.
INSTALLATION
Installation is in the reverse order of removal.
CAUTION:
• The heater pump rubber mount must be fully seated on the bracket.
• Do not disassemble the heater pump, replace the heater pump as an assembly.
LBIA0414E
1.
Cowl top
2.
Heater pump electrical connector
3.
Heater pump
4.
Heater hose and clamp
5.
Heater hose and clamp
2011 Pathfinder
HA-58
< SERVICE DATA AND SPECIFICATIONS (SDS)
SERVICE DATA AND SPECIFICATIONS (SDS)
SERVICE DATA AND SPECIFICATIONS (SDS)
SERVICE DATA AND SPECIFICATIONS (SDS)
Service Data and Specification (SDS)
INFOID:0000000006243613
COMPRESSOR
OIL
REFRIGERANT
* : Always check with Parts Department for latest parts information.
Make
ZEXEL VALEO CLIMATE CONTROL*
Model
DKS-17D
Type
Swash plate
Displacement
175.5 cm
3
(10.7 in
3
) / revolution
Cylinder bore
×
stroke
30.5 mm (1.20 in) x 24.0 mm (0.94 in)
Direction of rotation
Clockwise (viewed from drive end)
Drive belt
Poly V
Name
NISSAN A/C System Oil Type S or equivalent
Capacity
With rear A/C
210 m (7.1 US fl oz, 7.4 Imp fl oz)
Without rear A/C
180 m (6.1 US fl oz, 6.3 Imp fl oz)
Type
HFC 134a (R-134a)
Capacity
With rear A/C
0.85
±
0.05 kg (1.87
±
0.11 lb)
Without rear A/C
0.70
±
0.05 kg (1.54
±
0.11 lb)
2011 Pathfinder
HAC-1
VENTILATION, HEATER & AIR CONDITIONER
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SECTION
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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 (Front) . . . . . . . . . .....
Operational Check (Rear) . . . . . . . . . .....
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 (Front) . . . . . . . . . ..
Switches And Their Control Function (Front) . . ..
Switches And Their Control Function (Rear) . . ...
DIAGNOSIS SYSTEM (HVAC) . . . . . . ..
CONSULT-III Function (HVAC) . . . . . . . ...
DIAGNOSIS SYSTEM (BCM) . . . . . . .
COMMON ITEM . . . . . . . . . . . . . . .
COMMON ITEM : CONSULT-III Function (BCM -
COMMON ITEM) . . . . . . . . . . . . . .
AIR CONDITIONER . . . . . . . . . . . . ...
AIR CONDITIONER : CONSULT-III Function
(BCM - AIR CONDITIONER) . . . . . . . . ..
SELF-DIAGNOSIS FUNCTION . . . . . . ..
A/C Auto Amp. Self-Diagnosis . . . . . . . . .
A/C and AV Switch Assembly Self-Diagnosis . . .
A/C System Self-Diagnosis Code Chart . . . . ..
DTC/CIRCUIT DIAGNOSIS . . . . . . .
MODE DOOR MOTOR . . . . . . . . . ..
System Description . . . . . . . . . . . . ..
Mode Door Motor (Front) Component Function
Check . . . . . . . . . . . . . . . . . ..
Mode Door Motor (Front) 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 . . . . .
BLOWER MOTOR CONTROL SYSTEM . . ..
System Description . . . . . . . . . . . . ..
Front Blower Motor Component Function Check .
Front Blower Motor Diagnosis Procedure . . . .
Front Blower Motor Component Inspection . . . .
Rear Blower Motor Description . . . . . . . .
Rear Blower Motor Component Function Check . .
Rear Air Control (Front) Diagnosis Procedure #1 .
Rear Air Control (Rear) Diagnosis Procedure #2 .
Rear Air Control (Rear) Diagnosis Procedure #3 .
Rear Air Control (Rear) Diagnosis Procedure #4 .
Rear Blower Motor And Relay Component Inspec-
tion . . . . . . . . . . . . . . . . . . ...
REAR AIR CONTROL SYSTEM . . . . . ...
2011 Pathfinder
HAC-2
Rear Air Control System Description . . . . . ..
Rear Air Control Component Function Check . ....
Rear Air Control (Front) Diagnosis Procedure . ....
Rear Air Control (Rear) Diagnosis Procedure . ....
MAGNET CLUTCH . . . . . . . . . . .
System Description . . . . . . . . . . . . .
Magnet Clutch Component Function Check . . ...
Magnet Clutch Diagnosis Procedure . . . . . ..
WATER VALVE CIRCUIT . . . . . . . . ..
Water Valve Description (VK56DE) . . . . . ....
Water Valve Diagnosis Procedure (VK56DE) . . .
HEATER PUMP . . . . . . . . . . . . .
System Description (VQ40DE) . . . . . . . ...
Diagnosis Procedure (VQ40DE) . . . . . . . .
Component Inspection (VQ40DE) . . . . . . ..
AMBIENT SENSOR . . . . . . . . . . ...
Component Description . . . . . . . . . . ..
Ambient Sensor Diagnosis Procedure . . . . ....
Ambient Sensor Component Inspection . . . . .
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 . . . . . . . . . . ..
A/C Auto Amp. Component Function Check . . ..
A/C Auto Amp Power and Ground Diagnosis Pro-
cedure . . . . . . . . . . . . . . . . . .
ECU DIAGNOSIS INFORMATION . . . ..
AIR CONDITIONER CONTROL . . . . . .
A/C Auto Amp. Terminals Reference Values . . .
WIRING DIAGRAM . . . . . . . . . .
AIR CONDITIONER CONTROL . . . . . .
Wiring Diagram - Automatic . . . . . . . . ....
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 . . . . . . . . . . . .
Precaution Necessary for Steering Wheel Rota-
tion After Battery Disconnect . . . . . . . .
Working with HFC-134a (R-134a) . . . . . . .
Precaution for Service Equipment . . . . . .
MANUAL 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 . . . . . . . ..
MANUAL AIR CONDITIONER SYSTEM . . .
Control System Diagram . . . . . . . . . ...
Control System Description . . . . . . . . ..
Discharge Air Flow . . . . . . . . . . . .
Switches And Their Control Function . . . . .
DIAGNOSIS SYSTEM (BCM) . . . . . . ...
COMMON ITEM . . . . . . . . . . . . . ...
COMMON ITEM : CONSULT-III Function (BCM -
COMMON ITEM) . . . . . . . . . . . . ..
AIR CONDITIONER . . . . . . . . . . . . .
AIR CONDITIONER : CONSULT-III Function
(BCM - AIR CONDITIONER) . . . . . . . .
DTC/CIRCUIT DIAGNOSIS . . . . . ...
MODE DOOR MOTOR . . . . . . . . . .
2011 Pathfinder
HAC-3
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HAC
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System Description . . . . . . . . . . . ...
Mode Door Motor (Front) Component Function
Check . . . . . . . . . . . . . . . . .
Mode Door Motor (Front) 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 . . . ...
BLOWER MOTOR . . . . . . . . . . .
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 . . . . . .
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 . . . . . ..
System Description . . . . . . . . . . . .
System Operation . . . . . . . . . . . . ..
Front Air Control Terminals Reference Values . ..
WIRING DIAGRAM . . . . . . . . .
AIR CONDITIONER CONTROL . . . . . ..
Wiring Diagram - Instruction . . . . . . . . . ...
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 . . . . . . . . ..
PRECAUTION . . . . . . . . . . .
PRECAUTIONS . . . . . . . . . . . ...
Working with HFC-134a (R-134a) . . . . . . .
Precaution for Service Equipment . . . . . . .
2011 Pathfinder
HAC-4
< BASIC INSPECTION >
[AUTOMATIC AIR CONDITIONER]
DIAGNOSIS AND REPAIR WORKFLOW
BASIC INSPECTION
DIAGNOSIS AND REPAIR WORKFLOW
How to Perform Trouble Diagnosis For Quick And Accurate Repair
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WORK FLOW
1.
LISTEN TO CUSTOMER COMPLAINT
Listen to customer complaint. Get detailed information about the conditions and environment when the symp-
tom occurs.
>> GO TO 2
2.
CHECK FOR SERVICE BULLETINS
Check for any service bulletins.
>> GO TO 3.
3.
VERIFY THE SYMPTOM WITH OPERATIONAL CHECK
Verify the symptom with operational check. Refer to
HAC-5, "Operational Check (Front)"
.
Is the inspection result normal?
YES
>> GO TO 4
NO
>> GO TO 5
4.
GO TO APPROPRIATE TROUBLE DIAGNOSIS
Go to appropriate trouble diagnosis. Refer to
HAC-111, "Symptom Matrix Chart"
Is the inspection result normal?
>> GO TO 5.
5.
PERFORM THE A/C AUTO AMP SELF-DIAGNOSIS
Perform A/C auto amp. self-diagnosis. Refer to
HAC-24, "A/C Auto Amp. Self-Diagnosis"
.
>> If any diagnostic trouble codes set. Refer to
HAC-25, "A/C System Self-Diagnosis Code Chart"
.
>> Confirm the repair by performing operational check. Refer to
HAC-5, "Operational Check (Front)"
or
HAC-6, "Operational Check (Rear)"
.
2011 Pathfinder
INSPECTION AND ADJUSTMENT
HAC-5
< BASIC INSPECTION >
[AUTOMATIC AIR CONDITIONER]
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INSPECTION AND ADJUSTMENT
Operational Check (Front)
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The purpose of the operational check is to confirm that the system operates properly.
CHECKING MEMORY FUNCTION
1. Set the temperature to 32
°
C (90
°
F).
2. Press the OFF switch.
3. Turn ignition switch OFF.
4. Turn ignition switch ON.
5. Press the AUTO switch.
6. Confirm that the set temperature remains at previous temperature.
7. Press the OFF switch.
If NG, go to trouble diagnosis procedure for
HAC-124, "Memory Function Check"
.
If OK, continue with next check.
CHECKING BLOWER
1. Press the blower speed control switch (+) once, blower should operate on low speed. The fan display
should have one bar lit (on display).
2. Press the blower speed control switch (+) again, and continue checking blower speed and fan display until
all speeds are checked.
3. Leave blower on maximum speed.
If NG, go to trouble diagnosis procedure for
HAC-42, "Front Blower Motor Diagnosis Procedure"
.
If OK, continue with next check.
CHECKING DISCHARGE AIR
1. Press MODE switch four times and the DEF
switch.
2. Each position indicator should change shape (on display).
3. Confirm that discharge air comes out according to the air distribution table. Refer to
Mode door position is checked in the next step.
If NG, go to trouble diagnosis procedure for
HAC-27, "Mode Door Motor (Front) Diagnosis Procedure"
.
If OK, continue the check.
NOTE:
Confirm that the compressor clutch is engaged (sound or visual inspection) and intake door position is at
fresh when the FOOT, DEF or D/F is selected.
CHECKING RECIRCULATION ( , ONLY)
1. Press recirculation (
) switch one time. Recirculation indicator should illuminate.
2. Press recirculation (
) switch one more time. Recirculation indicator should go off.
3. Listen for intake door position change (blower sound should change slightly).
If NG, go to trouble diagnosis procedure for
HAC-39, "Intake Door Motor Diagnosis Procedure"
.
If OK, continue the check.
NOTE:
Confirm that the compressor clutch is engaged (sound or visual inspection) and intake door position is at fresh
when the FOOT, DEF or D/F is selected. REC (
) is not allowed in DEF (
) D/F (
) or FOOT (
).
CHECKING TEMPERATURE DECREASE
1. Rotate temperature control dial (drive or passenger) counterclockwise until 18
°
C (60
°
F) is displayed.
2. Check for cold air at appropriate discharge air outlets.
Conditions
: Engine running and at normal operating temperature
2011 Pathfinder
HAC-6
< BASIC INSPECTION >
[AUTOMATIC AIR CONDITIONER]
INSPECTION AND ADJUSTMENT
If NG, listen for sound of air mix door motor operation. If OK, go to trouble diagnosis procedure for
. If air mix door motor appears to be malfunctioning, go to
Motor (Driver) Component Function Check"
If OK, continue the check.
CHECKING TEMPERATURE INCREASE
1. Rotate temperature control dial clockwise (drive or passenger) until 32
°
C (90
°
F) is displayed.
2. Check for hot air at appropriate discharge air outlets.
If NG, listen for sound of air mix door motor operation. If OK, go to trouble diagnosis procedure for
. If air mix door motor appears to be malfunctioning, go to
Motor (Driver) Component Function Check"
If OK, continue with next check.
CHECK A/C SWITCH
1. Press A/C switch when AUTO switch is ON, or in manual mode.
2. A/C switch indicator will turn ON.
• Confirm that the compressor clutch engages (sound or visual inspection).
NOTE:
If current mode setting is DEF or D/F, compressor clutch will already be engaged and cannot be turned off.
If NG, go to trouble diagnosis procedure for
HAC-69, "Magnet Clutch Diagnosis Procedure"
.
If OK, continue with next check.
CHECKING AUTO MODE
1. Press AUTO switch.
2. Display should indicate AUTO.
• If ambient temperature is warm, and selected temperature is cool, confirm that the compressor clutch
engages (sound or visual inspection). (Discharge air and blower speed will depend on ambient, in-vehi-
cle, and set temperatures.)
If NG, go to trouble diagnosis procedure for
HAC-91, "A/C Auto Amp Power and Ground Diagnosis Proce-
, then if necessary, trouble diagnosis procedure for
HAC-69, "Magnet Clutch Diagnosis Procedure"
.
If all operational checks are OK (inspection results are normal), go to malfunction Simulation Tests in
"How to Perform Trouble Diagnosis For Quick And Accurate Repair"
and perform tests as outlined to simulate
driving conditions environment. If symptom appears. Refer to
HAC-111, "Symptom Matrix Chart"
, and per-
form applicable trouble diagnosis procedures.
Operational Check (Rear)
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The purpose of the operational check is to confirm that the system operates properly.
CHECKING REAR BLOWER MOTOR
1. Turn the ignition switch ON.
2. Rotate rear air control (front) blower control dial to low speed.
3. Rotate the blower control dial clockwise and continue checking blower speed until all speeds are checked.
4. Leave blower on maximum speed.
5. Press the REAR CTRL switch from the rear air control (front).
6. Rotate rear air control (rear) blower control dial to low speed.
7. Rotate the blower control dial clockwise and continue checking blower speed until all speeds are checked.
8. Leave blower on maximum speed.
If NG, go to trouble diagnosis procedure for
HAC-48, "Rear Blower Motor Component Function Check"
If OK, continue with next check.
CHECKING REAR TEMPERATURE DECREASE
1. Press the REAR CTRL switch (indicator off).
2. Rotate the rear air control (front) temperature control dial counterclockwise to maximum cold.
3. Check for cold air at appropriate discharge air outlets.
Conditions
: Engine running and at normal operating temperature
2011 Pathfinder
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