Nissan Pathfinder (2006 year). Manual - part 54

 

  Index      Manuals     Nissan Pathfinder (2006 year) - Service and Repair Manual

 

Search            copyright infringement  

 

 

 

 

 

 

 

 

Content      ..     52      53      54      55     ..

 

 

Nissan Pathfinder (2006 year). Manual - part 54

 

 

TROUBLE DIAGNOSIS

ATC-97

C

D

E

F

G

H

I

K

L

M

A

B

ATC

2006 Pathfinder

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 the preset value, the compressor turns ON. The compressor turns
OFF when intake air temperature is lower than the preset value. That preset value is dependent on the ambi-
ent temperature, refer to the following table.

DIAGNOSTIC PROCEDURE FOR MAGNET CLUTCH

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

1. 

CHECK INTAKE AND AMBIENT SENSOR CIRCUITS

Check intake and ambient sensors. Refer to 

ATC-51, "A/C System Self-diagnosis Function"

 .

OK or NG

OK

>> GO TO 2.

NG

>> Malfunctioning intake sensor. Refer to 

ATC-125, "Intake Sensor Circuit"

 .

Ambient temperature 

°

C (

°

F)

Compressor ON             

intake temperature 

°

C (

°

F)

Compressor OFF             

intake temperature 

°

C (

°

F)

0 (32)

2.5 (37)

2.0 (36)

10 (50)

2.5 (37)

2.0 (36)

20 (68)

2.5 (37)

1.5 (35)

30 (86)

2.0 (36)

0.5 (33)

40 (104)

2.0 (36)

0.5 (33)

50 (122)

2.0 (36)

0.5 (33)

WJIA1272E

ATC-98

TROUBLE DIAGNOSIS

2006 Pathfinder

2. 

PERFORM AUTO ACTIVE TEST

Refer to 

PG-24, "Auto Active Test"

 .

Does magnet clutch operate?

YES or NO

YES

>>

●

WITH CONSULT-II

GO TO 5.

●

WITHOUT CONSULT-II

GO TO 6.

NO

>> Check 10A fuse (No. 42, located in IPDM E/R), and GO TO 3.

3. 

CHECK CIRCUIT CONTINUITY BETWEEN IPDM E/R AND COMPRESSOR

1.

Turn ignition switch OFF.

2.

Disconnect IPDM E/R connector and compressor (magnet
clutch) connector.

3.

Check continuity between IPDM E/R harness connector E119
terminal 11 and compressor harness connector F3 terminal 1.

OK or NG

OK

>> GO TO 4.

NG

>> Repair harness or connector.

4. 

CHECK MAGNET CLUTCH CIRCUIT

Check for operation sound when applying battery voltage direct cur-
rent to terminal.

OK or NG

OK

>> Replace IPDM E/R. Refer to 

PG-32, "Removal and

Installation of IPDM E/R"

 .

NG

>> Replace magnet clutch. Refer to 

ATC-159, "Removal

and Installation for Compressor Clutch"

 .

5. 

CHECK BCM INPUT (COMPRESSOR ON) SIGNAL

Check compressor ON/OFF signal. Refer to 

ATC-34, "CONSULT-II

Function (BCM)"

 .

OK or NG

OK

>> GO TO 8.

NG

>> GO TO 6.

11 – 1

: Continuity should exist.

WJIA0560E

SJIA0197E

A/C SW ON

: COMP ON SIG ON

A/C SW OFF

: COMP ON SIG OFF

WJIA0469E

TROUBLE DIAGNOSIS

ATC-99

C

D

E

F

G

H

I

K

L

M

A

B

ATC

2006 Pathfinder

6. 

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 terminal
27 and front air control harness connector M49 terminal 10.

OK or NG

OK

>> GO TO 7.

NG

>> Repair harness or connector.

7. 

CHECK VOLTAGE FOR FRONT AIR CONTROL (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 M49
terminal 10 and ground.

OK or NG

OK

>> GO TO 8.

NG-1

>> If the voltage is approx. 5V when A/C switch is ON, replace front air control. Refer to 

ATC-127,

"FRONT AIR CONTROL"

 .

NG-2

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

BCS-27, "Removal

and Installation"

 .

27 - 10

Continuity should exist.

WJIA1136E

Terminals

Condition

Voltage

(Approx.)

(+)

(-)

Front air 

control con-

nector

Terminal No.

M49

10

Ground

A/C switch: ON

0V

A/C switch: OFF

5V

WJIA1137E

ATC-100

TROUBLE DIAGNOSIS

2006 Pathfinder

8. 

CHECK REFRIGERANT PRESSURE SENSOR

WITH CONSULT-II

1.

Start engine.

2.

Check voltage of refrigerant pressure sensor. Refer to 

ATC-34, "CONSULT-II Function (BCM)"

 .

WITHOUT CONSULT-II

1.

Start engine.

2.

Check voltage between ECM harness connector F54 terminal
70 and ground.

OK or NG

OK

>>

●

WITH CONSULT-II

GO TO 9.

●

WITHOUT CONSULT-II

GO TO 10.

NG

>> Refer to 

EC-659, "REFRIGERANT PRESSURE SENSOR"

 .

9. 

CHECK BCM INPUT (FAN ON) SIGNAL

Check FAN ON/OFF signal. Refer to 

ATC-34, "CONSULT-II Function

(BCM)"

 .

OK or NG

OK

>> GO TO 12.

NG

>> GO TO 10.

10. 

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 terminal
28 and front air control harness connector M50 terminal 35.

OK or NG

OK

>> GO TO 11.

NG

>> Repair harness or connector.

Terminals

Condition

Voltage

(Approx.)

(+)

(-)

ECM con-

nector

Terminal No.

F54

70

Ground

A/C switch: ON

0.36 - 3.88V

LJIA0124E

FRONT BLOWER CONTROL 
DIAL ON

: FAN ON SIG ON

FRONT BLOWER CONTROL 
DIAL OFF

: FAN ON SIG OFF

WJIA0469E

28 - 35

Continuity should exist.

WJIA1138E

TROUBLE DIAGNOSIS

ATC-101

C

D

E

F

G

H

I

K

L

M

A

B

ATC

2006 Pathfinder

11. 

CHECK VOLTAGE FOR FRONT AIR CONTROL (FAN 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 M50
terminal 35 and ground.

OK or NG

OK

>> GO TO 12.

NG-1

>> If the voltage is approx. 5V when blower motor is ON, replace front air control. Refer to 

ATC-127,

"FRONT AIR CONTROL"

 .

NG-2

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

BCS-27, "Removal

and Installation"

 .

12. 

CHECK CAN COMMUNICATION

Check CAN communication. Refer to 

LAN-25, "CAN COMMUNICATION"

 .

●

BCM – ECM

●

ECM – IPDM E/R

●

ECM – Front air control

OK or NG

OK

>> Inspection End.

NG

>> Repair or replace malfunctioning part(s).

Terminals

Condition

Voltage

(Approx.)

(+)

(-)

Front air con-

trol connector

Terminal No.

M50

35

Ground

A/C switch: ON
Blower motor 
operates

0V

A/C switch: OFF

5V

WJIA1139E

TROUBLE DIAGNOSIS

ATC-103

C

D

E

F

G

H

I

K

L

M

A

B

ATC

2006 Pathfinder

PERFORMANCE TEST DIAGNOSES

*1

ATC-105, "PERFORMANCE 
CHART"

*2

ATC-105, "PERFORMANCE 
CHART"

*3

ATC-106, "Trouble Diagnoses for 
Unusual Pressure"

*4

ATC-63, "Air Mix Door Motor Circuit"

RJIA1601E

 

 

 

 

 

 

 

Content      ..     52      53      54      55     ..