Nissan Pathfinder (2009 year). Manual - part 470

BLOWER MOTOR

HAC-155

< COMPONENT DIAGNOSIS >

[MANUAL AIR CONDITIONER]

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HAC

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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

2009 Pathfinder

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 

HAC-125, "Operational Check"

.

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 

HAC-125, "Operational Check"

.

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

MAGNET CLUTCH

HAC-157

< COMPONENT DIAGNOSIS >

[MANUAL AIR CONDITIONER]

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SYMPTOM: Magnet clutch does not engage when A/C switch is ON.

1.

PERFORM AUTO ACTIVE TEST

Refer to 

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 

EC-129, "Diagnosis Procedure"

 (VQ40DE) or 

EC-606, "Diagnosis

Procedure"

 (VK56DE). 

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Replace refrigerant pressure sensor. Refer to 

HA-55, "Removal and Installation for Refrigerant

Pressure Sensor"

.

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

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 

VTL-7,

"Removal and Installation"

.

NO-2

>> If the voltage is approx. 0V when blower motor is OFF, replace BCM. Refer to 

BCS-59, "Removal

and Installation"

.

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

MAGNET CLUTCH

HAC-159

< COMPONENT DIAGNOSIS >

[MANUAL AIR CONDITIONER]

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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 

VTL-7,

"Removal and Installation"

.

NO-2

>> If the voltage is approx. 0V when A/C switch is OFF, replace BCM. Refer to 

BCS-59, "Removal

and Installation"

.

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 

HA-41, "Removal and

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

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 

PCS-33, "Removal and

Installation of IPDM E/R"

.

NO

>> Repair harness or connector.

11 – 1

: Continuity should exist.

WJIA1470E

2009 Pathfinder

INTAKE SENSOR

HAC-161

< COMPONENT DIAGNOSIS >

[MANUAL AIR CONDITIONER]

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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

HAC-162

< COMPONENT DIAGNOSIS >

[MANUAL AIR CONDITIONER]

INTAKE SENSOR

3.

CHECK INTAKE SENSOR

Refer to 

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-

tion"

.

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