Nissan Pathfinder (2011 year). Manual — part 462
BLOWER MOTOR
HAC-159
< DTC/CIRCUIT DIAGNOSIS >
[MANUAL AIR CONDITIONER]
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A
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HAC
N
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Check continuity between terminals. There will be resistance, but
there should not be an open or short between any two terminals.
WJIA0971E
2011 Pathfinder
HAC-160
< DTC/CIRCUIT DIAGNOSIS >
[MANUAL AIR CONDITIONER]
MAGNET CLUTCH
MAGNET CLUTCH
System Description
INFOID:0000000006243718
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:0000000006243719
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).
Is the inspection result normal?
YES
>> Inspection End.
NO
>> Go to diagnosis procedure. Refer to
HAC-160, "Magnet Clutch Diagnosis Procedure"
.
Magnet Clutch Diagnosis Procedure
INFOID:0000000006243720
Regarding Wiring Diagram information, refer to
HAC-172, "Wiring Diagram - Manual"
.
DIAGNOSTIC PROCEDURE FOR MAGNET CLUTCH
SYMPTOM: Magnet clutch does not engage when A/C switch is ON.
1.
PERFORM AUTO ACTIVE TEST
PCS-11, "CONSULT - III Function (IPDM E/R)"
.
Does magnet clutch operate?
YES or NO
YES
>> •
WITH CONSULT-III
GO TO 2.
WJIA1490E
2011 Pathfinder
MAGNET CLUTCH
HAC-161
< DTC/CIRCUIT DIAGNOSIS >
[MANUAL AIR CONDITIONER]
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HAC
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•
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-141, "AIR CONDITIONER : CONSULT-III Function
.
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-54, "Removal and Installation for Refrigerant
4.
CHECK BCM INPUT (FAN ON) SIGNAL
Check FAN ON/OFF signal. Refer to
HAC-141, "AIR CONDITIONER : CONSULT-III Function (BCM - AIR
Is the inspection result normal?
YES
>> GO TO 7.
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)
A/C SW ON
:AIR COND SW ON
A/C SW OFF
:AIR COND SW OFF
BLOWER CONTROL DIAL
ON
: FAN ON SIG ON
BLOWER CONTROL DIAL
OFF
: FAN ON SIG OFF
A
B
Connector
Terminal Connector
Terminal
Continuity
BCM: M18
28
Front air control:
M52
18
Yes
WJIA1627E
2011 Pathfinder
HAC-162
< DTC/CIRCUIT DIAGNOSIS >
[MANUAL AIR CONDITIONER]
MAGNET CLUTCH
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-55, "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)
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 connec-
tor M52 terminal 10.
3. Check continuity between BCM harness connector M18 terminal 27 and ground.
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
Terminals
Condition
Voltage
(Approx.)
(+)
(-)
Front air
control con-
nector
Terminal No.
M52
10
Ground
A/C switch: ON
Approx. 0V
A/C switch:
OFF
Approx. 5V
WJIA1137E
27 - 10
: Continuity should exist.
2011 Pathfinder
MAGNET CLUTCH
HAC-163
< DTC/CIRCUIT DIAGNOSIS >
[MANUAL AIR CONDITIONER]
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HAC
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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-55, "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"
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.
4. Check continuity between IPDM E/R harness connector E119 terminal 11 and ground.
Is the inspection result normal?
YES
>> Replace IPDM E/R. Refer to
PCS-29, "Removal and Installation of IPDM E/R"
.
NO
>> Repair harness or connector.
27 - ground
: Continuity should not exist.
WJIA1472E
11 – 1
: Continuity should exist.
11 – ground
: Continuity should not exist.
2011 Pathfinder
HAC-164
< DTC/CIRCUIT DIAGNOSIS >
[MANUAL AIR CONDITIONER]
INTAKE SENSOR
INTAKE SENSOR
System Description
INFOID:0000000006243721
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:0000000006243722
Regarding Wiring Diagram information, refer to
HAC-172, "Wiring Diagram - Manual"
.
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
WJIA1155E
WJIA1156E
2 - Ground
: Approx. 5V
AWIIA0892ZZ
2011 Pathfinder
INTAKE SENSOR
HAC-165
< DTC/CIRCUIT DIAGNOSIS >
[MANUAL AIR CONDITIONER]
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A
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HAC
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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.
3.
CHECK INTAKE SENSOR
HAC-165, "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:0000000006243723
COMPONENT INSPECTION
Intake Sensor
1 - 13
: Continuity should exist.
AWIIA0896ZZ
2 - 12
: Continuity should exist.
2 - Ground
: Continuity should not exist.
AWIIA0861ZZ
2011 Pathfinder
HAC-166
< DTC/CIRCUIT DIAGNOSIS >
[MANUAL AIR CONDITIONER]
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-
.
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
2011 Pathfinder
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