Nissan Pathfinder (2007 year). Manual - part 56

TROUBLE DIAGNOSIS

ATC-99

C

D

E

F

G

H

I

K

L

M

A

B

ATC

2007 Pathfinder

2. 

PERFORM AUTO ACTIVE TEST

Refer to 

PG-23, "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-163, "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

ATC-100

TROUBLE DIAGNOSIS

2007 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-131,

"FRONT AIR CONTROL"

 .

NG-2

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

BCS-25, "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

TROUBLE DIAGNOSIS

ATC-101

C

D

E

F

G

H

I

K

L

M

A

B

ATC

2007 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-656, "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

ATC-102

TROUBLE DIAGNOSIS

2007 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-131,

"FRONT AIR CONTROL"

 .

NG-2

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

BCS-25, "Removal

and Installation"

 .

12. 

CHECK CAN COMMUNICATION

Check CAN communication. Refer to 

LAN-4, "SYSTEM DESCRIPTION"

 .

●

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

2007 Pathfinder

Insufficient Cooling

EJS004PC

SYMPTOM: Insufficient cooling

INSPECTION FLOW

1. 

CONFIRM SYMPTOM BY PERFORMING OPERATIONAL CHECK - TEMPERATURE DECREASE 

1.

Press the AUTO switch.

2.

Turn temperature control dial (driver) counterclockwise until 16

°

 C (60

°

 F) is displayed.

3.

Check for cold air at discharge air outlets.

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 

ATC-52, "Operational Check (Front)"

  .

Does another symptom exist?

YES

>> Refer to 

ATC-34, "SYMPTOM TABLE"

 . 

NO

>> System OK.

3. 

CHECK FOR SERVICE BULLETINS

Check for any service bulletins.

>> GO TO 3.

4. 

PERFORM SELF-DIAGNOSIS

Perform self-diagnosis. Refer to 

ATC-50, "A/C System Self-diagnosis Function"

 .

OK or NG

OK

>> GO TO 5.

NG

>> Refer to 

ATC-51, "SELF-DIAGNOSIS CODE CHART"

 .

5. 

CHECK DRIVE BELTS 

Check compressor belt tension. Refer to 

EM-14, "Checking Drive Belts"

  .

OK or NG

OK

>> GO TO 6.

NG

>> Adjust or replace compressor belt. Refer to 

EM-14, "Removal and Installation"

  .

6. 

CHECK AIR MIX DOOR OPERATION

Check and verify air mix door mechanism for smooth operation. 

Does air mix door operate correctly?

YES

>> GO TO 7.

NO

>> Repair or replace air mix door control linkage.

7. 

CHECK COOLING FAN MOTOR OPERATION

Check and verify cooling fan motor for smooth operation. Refer to 

EC-488, "Description"

  .

Does cooling fan motor operate correctly?

YES

>> GO TO 8.

NO

>> Check cooling fan motor. Refer to 

EC-488, "DTC P1217 ENGINE OVER TEMPERATURE"

  .

ATC-104

TROUBLE DIAGNOSIS

2007 Pathfinder

8. 

CHECK RECOVERY/RECYCLING EQUIPMENT BEFORE USAGE

Check recovery/recycling equipment before connecting to vehicle. Verify there is no pressure in the recovery/
recycling equipment by checking the gauges. If pressure exists, recover refrigerant from equipment lines.

>> GO TO 9.

9. 

CHECK REFRIGERANT PURITY

1.

Connect recovery/recycling equipment to vehicle.

2.

Confirm refrigerant purity in supply tank using recovery/recycling and refrigerant identifier.

OK or NG

OK

>> GO TO 10.

NG

>> Check contaminated refrigerant. Refer to 

ATC-5, "Contaminated Refrigerant"

 .

10. 

CHECK FOR EVAPORATOR FREEZE UP

Start engine and run A/C. Check for evaporator freeze up.

Does evaporator freeze up?

YES

>> Perform performance test diagnoses. Refer to 

ATC-105, "PERFORMANCE TEST DIAGNOSES"

.

NO

>> GO TO 11.

11. 

CHECK REFRIGERANT PRESSURE

Check refrigerant pressure with manifold gauge connected. Refer to 

ATC-107, "Test Reading"

  . 

OK or NG

OK

>> Perform performance test diagnoses. Refer to 

ATC-105, "PERFORMANCE TEST DIAGNOSES"

 .

NG

>> GO TO 12.

12. 

CHECK AIR DUCTS

Check ducts for air leaks.

OK or NG

OK

>> System OK.

NG

>> Repair air leaks.

TROUBLE DIAGNOSIS

ATC-105

C

D

E

F

G

H

I

K

L

M

A

B

ATC

2007 Pathfinder

PERFORMANCE TEST DIAGNOSES

*1

ATC-107, "PERFORMANCE 
CHART"

*2

ATC-107, "PERFORMANCE 
CHART"

*3

ATC-108, "Trouble Diagnoses for 
Unusual Pressure"

*4

ATC-63, "Air Mix Door Motor Circuit"

RJIA1601E

ATC-106

TROUBLE DIAGNOSIS

2007 Pathfinder

*1

ATC-163, "Removal and Installation 
for Compressor Clutch"

*2

ATC-76, "Front Blower Motor Circuit"

*3

MA-13, "Checking Drive Belts"

WJIA1371E