Nissan Pathfinder (2009 year). Instruction — part 470
![](/vehicle/qul/dozowhande/bllerun/wing.png)
BLOWER MOTOR
HAC-155
< COMPONENT DIAGNOSIS >
[MANUAL AIR CONDITIONER]
C
D
E
F
G
H
J
K
L
M
A
B
HAC
N
O
P
Check continuity between terminals. There will be resistance, but
there should not be an open or short between any two terminals.
WJIA0971E
2009 Pathfinder
![](/vehicle/qul/dozowhande/bllerun/veyapmy.png)
HAC-156
< COMPONENT DIAGNOSIS >
[MANUAL AIR CONDITIONER]
MAGNET CLUTCH
MAGNET CLUTCH
System Description
INFOID:0000000003935973
SYSTEM DESCRIPTION
The front air control controls compressor operation based on ambient and intake temperature and a signal
from ECM.
Low Temperature Protection Control
The front air control will turn the compressor ON or OFF as determined by a signal detected by the intake sen-
sor and the ambient sensor.
When intake air temperature is higher than 3.5
°
C (38.3
°
F), the compressor turns ON. The compressor turns
OFF when intake air temperature is lower than 2.5
°
C (36.5
°
F).
Magnet Clutch Component Function Check
INFOID:0000000003935974
SYMPTOM: Magnet clutch does not engage.
INSPECTION FLOW
1.
CONFIRM SYMPTOM BY PERFORMING OPERATIONAL CHECK - MAGNET CLUTCH
1.
Rotate blower control dial clockwise.
2.
Rotate mode dial to vent (
) position.
3.
Press A/C switch. Confirm that the compressor clutch engages (sound or visual inspection).
Can the symptom be duplicated?
YES
>> GO TO 3.
NO
>> GO TO 2.
2.
CHECK FOR ANY SYMPTOMS
Perform a complete operational check for any symptoms. Refer to
.
Does another symptom exist?
YES
>> Refer to
HAC-174, "Symptom Matrix Chart"
.
NO
>> System OK.
3.
CHECK FOR SERVICE BULLETINS
Check for any service bulletins.
>> GO TO 4.
4.
CHECK INTAKE SENSOR
Check and verify intake sensor circuit. Refer to
HAC-162, "Intake Sensor Component Inspection"
>> GO TO 5.
5.
RECHECK FOR ANY SYMPTOMS
Perform a complete operational check for any symptoms. Refer to
.
Does another symptom exist?
YES
>> Refer to
HAC-174, "Symptom Matrix Chart"
.
NO
>> Replace front air control. Refer to
VTL-7, "Removal and Installation"
.
Magnet Clutch Diagnosis Procedure
INFOID:0000000003935975
DIAGNOSTIC PROCEDURE FOR MAGNET CLUTCH
2009 Pathfinder
![](/vehicle/qul/dozowhande/bllerun/sifoubesknge.png)
MAGNET CLUTCH
HAC-157
< COMPONENT DIAGNOSIS >
[MANUAL AIR CONDITIONER]
C
D
E
F
G
H
J
K
L
M
A
B
HAC
N
O
P
SYMPTOM: Magnet clutch does not engage when A/C switch is ON.
1.
PERFORM AUTO ACTIVE TEST
PCS-14, "CONSULT - III Function (IPDM E/R)"
.
Does magnet clutch operate?
YES or NO
YES
>> •
WITH CONSULT-III
GO TO 2.
•
WITHOUT CONSULT-III
GO TO 8.
NO
>> Check 10A fuse (No. 42, located in IPDM E/R), and GO TO 12.
2.
CHECK BCM INPUT (A/C COMPRESSOR ON) SIGNAL
Check A/C compressor ON/OFF signal. Refer to
HAC-136, "CONSULT-III Function (BCM - COMMON ITEM)"
.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> GO TO 8.
3.
CHECK REFRIGERANT PRESSURE SENSOR
Check refrigerant pressure sensor. Refer to
(VK56DE).
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> Replace refrigerant pressure sensor. Refer to
HA-55, "Removal and Installation for Refrigerant
4.
CHECK BCM INPUT (FAN ON) SIGNAL
Check FAN ON/OFF signal. Refer to
HAC-136, "CONSULT-III Function (BCM - COMMON ITEM)"
Is the inspection result normal?
YES
>> GO TO 7.
WJIA1490E
A/C SW ON
: COMP ON SIG ON
A/C SW OFF
: COMP ON SIG OFF
BLOWER CONTROL DIAL
ON
: FAN ON SIG ON
BLOWER CONTROL DIAL
OFF
: FAN ON SIG OFF
2009 Pathfinder
![](/vehicle/qul/dozowhande/bllerun/athito.png)
HAC-158
< COMPONENT DIAGNOSIS >
[MANUAL AIR CONDITIONER]
MAGNET CLUTCH
NO
>> GO TO 5.
5.
CHECK CIRCUIT CONTINUITY BETWEEN BCM AND FRONT AIR CONTROL
1.
Turn ignition switch OFF.
2.
Disconnect BCM connector and front air control connector.
3.
Check continuity between BCM harness connector M18 (A) ter-
minal 28 and front air control harness connector M52 (B) termi-
nal 18.
Is the inspection result normal?
YES
>> GO TO 6.
NO
>> Repair harness or connector.
6.
CHECK VOLTAGE FOR FRONT AIR CONTROL (FAN ON SIGNAL)
1.
Reconnect BCM connector and front air control connector.
2.
Turn ignition switch ON.
3.
Turn A/C switch ON.
4.
Check voltage between front air control harness connector M52
terminal 18 and ground.
Is the inspection result normal?
YES
>> Replace BCM. Refer to
BCS-59, "Removal and Installation"
NO-1
>> If the voltage is approx. 5V when blower motor is ON, replace front air control. Refer to
.
NO-2
>> If the voltage is approx. 0V when blower motor is OFF, replace BCM. Refer to
.
7.
CHECK CAN COMMUNICATION
Check CAN communication. Refer to
LAN-14, "Trouble Diagnosis Flow Chart"
.
Is the inspection result normal?
YES
>> Inspection End.
NO
>> Repair or replace malfunctioning part(s).
8.
CHECK VOLTAGE FOR FRONT AIR CONTROL (A/C COMPRESSOR ON SIGNAL)
A
B
Connector
Terminal Connector
Terminal
Continuity
BCM: M18
28
Front air control:
M52
18
Yes
WJIA1627E
Terminals
Condition
Voltage
(Approx.)
(+)
(-)
Front air con-
trol connector
Terminal
No.
M52
18
Ground
A/C switch: ON
Blower motor
operates
0V
A/C switch: OFF
Battery voltage
WJIA1628E
2009 Pathfinder
![](/vehicle/qul/dozowhande/bllerun/med.png)
MAGNET CLUTCH
HAC-159
< COMPONENT DIAGNOSIS >
[MANUAL AIR CONDITIONER]
C
D
E
F
G
H
J
K
L
M
A
B
HAC
N
O
P
1.
Reconnect BCM connector and front air control connector.
2.
Turn ignition switch ON.
3.
Check voltage between front air control harness connector M52
terminal 10 and ground.
Is the inspection result normal?
YES
>> GO TO 9.
NO-1
>> If the voltage is approx. 5V when A/C switch is ON, replace front air control. Refer to
.
NO-2
>> If the voltage is approx. 0V when A/C switch is OFF, replace BCM. Refer to
.
9.
CHECK CIRCUIT CONTINUITY BETWEEN BCM AND FRONT AIR CONTROL
1.
Disconnect BCM connector and front air control connector.
2.
Check continuity between BCM harness connector M18 terminal
27 and front air control harness connector M52 terminal 10.
Is the inspection result normal?
YES
>> GO TO 10.
NO
>> Repair harness or connector.
10.
CHECK INTAKE SENSOR CIRCUITS
Check intake sensor. Refer to
VTL-11, "Removal and Installation"
.
Is the inspection result normal?
YES
>> GO TO 11.
NO
>> Replace intake sensor. Refer to
VTL-11, "Removal and Installation"
.
11.
CHECK CAN COMMUNICATION
Check CAN communication. Refer to
LAN-14, "Trouble Diagnosis Flow Chart"
.
Is the inspection result normal?
YES
>> Replace BCM. Refer to
BCS-59, "Removal and Installation"
NO
>> Repair or replace malfunctioning part(s).
12.
CHECK MAGNET CLUTCH CIRCUIT
Check for operation sound when applying battery voltage to terminal.
Is the inspection result normal?
YES
>> GO TO 13.
NO
>> Replace magnet clutch. Refer to
Installation for Compressor Clutch"
Terminals
Condition
Voltage
(Approx.)
(+)
(-)
Front air
control con-
nector
Terminal No.
M52
10
Ground
A/C switch: ON
0V
A/C switch:
OFF
Battery voltage
WJIA1137E
27 - 10
: Continuity should exist.
WJIA1136E
WJIA1472E
2009 Pathfinder
![](/vehicle/qul/dozowhande/bllerun/nswo.png)
HAC-160
< COMPONENT DIAGNOSIS >
[MANUAL AIR CONDITIONER]
MAGNET CLUTCH
13.
CHECK CIRCUIT CONTINUITY BETWEEN IPDM E/R AND A/C COMPRESSOR
1.
Turn ignition switch OFF.
2.
Disconnect IPDM E/R connector and A/C compressor (magnet
clutch) connector.
3.
Check continuity between IPDM E/R harness connector E119
terminal 11 and A/C compressor harness connector F3 terminal
1.
Is the inspection result normal?
YES
>> Replace IPDM E/R. Refer to
.
NO
>> Repair harness or connector.
11 – 1
: Continuity should exist.
WJIA1470E
2009 Pathfinder
![](/vehicle/qul/dozowhande/bllerun/sose.png)
INTAKE SENSOR
HAC-161
< COMPONENT DIAGNOSIS >
[MANUAL AIR CONDITIONER]
C
D
E
F
G
H
J
K
L
M
A
B
HAC
N
O
P
INTAKE SENSOR
System Description
INFOID:0000000003935976
COMPONENT DESCRIPTION
Intake Sensor
The intake sensor is located on top of the heater and cooling unit
assembly next to the A/C evaporator cover. It converts temperature
of air after it passes through the evaporator into a resistance value
which is then input to the front air control.
Intake Sensor Diagnosis Procedure
INFOID:0000000003935977
DIAGNOSTIC PROCEDURE FOR INTAKE SENSOR
SYMPTOM: Intake sensor circuit is open or shorted.
1.
CHECK VOLTAGE BETWEEN INTAKE SENSOR AND GROUND
1.
Disconnect intake sensor connector.
2.
Turn ignition switch ON.
3.
Check voltage between intake sensor harness connector M146
terminal 2 and ground.
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> GO TO 4.
2.
CHECK CIRCUIT CONTINUITY BETWEEN INTAKE SENSOR AND FRONT AIR CONTROL
1.
Turn ignition switch OFF.
2.
Disconnect front air control connector.
3.
Check continuity between intake sensor harness connector
M146 (A) terminal 1 and front air control harness connector M52
(B) terminal 13.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Repair harness or connector.
WJIA1155E
WJIA1156E
2 - Ground
: Approx. 5V
AWIIA0892ZZ
1 - 13
: Continuity should exist.
AWIIA0896ZZ
2009 Pathfinder
![](/vehicle/qul/dozowhande/bllerun/wrt.png)
HAC-162
< COMPONENT DIAGNOSIS >
[MANUAL AIR CONDITIONER]
INTAKE SENSOR
3.
CHECK INTAKE SENSOR
HAC-162, "Intake Sensor Component Inspection"
.
Is the inspection result normal?
YES
>> Replace front air control. Refer to
VTL-7, "Removal and Installation"
.
NO
>> Replace intake sensor. Refer to
VTL-11, "Removal and Installation"
.
4.
CHECK CIRCUIT CONTINUITY BETWEEN INTAKE SENSOR AND FRONT AIR CONTROL
1.
Turn ignition switch OFF.
2.
Disconnect front air control connector.
3.
Check continuity between intake sensor harness connector
M146 (B) terminal 2 and front air control harness connector M52
(A) terminal 12.
4.
Check continuity between intake sensor harness connector
M146 (A) terminal 2 and ground.
Is the inspection result normal?
YES
>> Replace front air control. Refer to
VTL-7, "Removal and Installation"
.
NO
>> Repair harness or connector.
Intake Sensor Component Inspection
INFOID:0000000003935978
COMPONENT INSPECTION
Intake Sensor
After disconnecting intake sensor connector, measure resistance
between terminals 1 and 2 at sensor harness side, using the table
below.
If NG, replace intake sensor. Refer to
VTL-11, "Removal and Installa-
.
2 - 12
: Continuity should exist.
2 - Ground
: Continuity should not exist.
AWIIA0861ZZ
Temperature
°
C (
°
F)
Resistance k
Ω
−
15 (5)
209.0
−
10 (14)
160.0
−
5 (23)
123.0
0 (32)
95.8
5 (41)
74.9
10 (50)
58.9
15 (59)
46.7
20 (68)
37.3
25 (77)
30.0
30 (86)
24.2
35 (95)
19.7
40 (104)
16.1
45 (113)
13.2
WJIA1159E
2009 Pathfinder
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