Nissan Pathfinder (2006 year). Instruction — part 56

TROUBLE DIAGNOSIS

ATC-113

C

D

E

F

G

H

I

K

L

M

A

B

ATC

2006 Pathfinder

Noise

EJS004PE

SYMPTOM: Noise

INSPECTION FLOW

WJIA1972E

ATC-114

TROUBLE DIAGNOSIS

2006 Pathfinder

*1

ATC-159, "REMOVAL"

*2

ATC-160, "INSTALLATION"

*3

ATC-22, "Maintenance of Oil Quan-
tity in Compressor"

*4

ATC-53, "Operational Check (Front)"

or

ATC-55, "Operational Check

(Rear)"

*5

MA-13, "Checking Drive Belts"

TROUBLE DIAGNOSIS

ATC-115

C

D

E

F

G

H

I

K

L

M

A

B

ATC

2006 Pathfinder

Self-diagnosis

EJS004PF

SYMPTOM: Self-diagnosis cannot be performed.

INSPECTION FLOW

*1

ATC-56, "Power Supply and Ground
Circuit for Front Air Control"

*2

ATC-117, "Ambient Sensor 1 Circuit"

*3

ATC-120, "In-vehicle Sensor Circuit"

*4

ATC-123, "Optical Sensor Circuit"

*5

ATC-125, "Intake Sensor Circuit"

*6

ATC-63, "Air Mix Door Motor Circuit"

*7

ATC-53, "Operational Check (Front)"

*8

ATC-36, "SYMPTOM TABLE"

WJIA1063E

ATC-116

TROUBLE DIAGNOSIS

2006 Pathfinder

Memory Function

EJS004PG

SYMPTOM: Memory function does not operate.

INSPECTION FLOW

*1

ATC-56, "Power Supply and Ground
Circuit for Front Air Control"

*2

ATC-53, "Operational Check (Front)"

*3

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

*4

ATC-52, "SELF-DIAGNOSIS CODE
CHART"

WJIA1287E

TROUBLE DIAGNOSIS

ATC-117

C

D

E

F

G

H

I

K

L

M

A

B

ATC

2006 Pathfinder

Ambient Sensor 1 Circuit

EJS004PH

COMPONENT DESCRIPTION
Ambient Sensor 1

Ambient sensor 1 (1) is attached to the radiator core support (left side). It detects ambient temperature and
converts it into a value which is then input into the front air control.

●

⇐

: Front

NOTE:
Both of the ambient sensors are located behind the front grille, below
the hood latch. The upper ambient sensor 1 (1) provides input for the
automatic A/C system. The lower ambient sensor 2 (2) provides
input for the compass/temperature driver information system.

AMBIENT TEMPERATURE INPUT PROCESS

The front air control includes a processing circuit for ambient sensor 1 input. However, when the temperature
detected by ambient sensor 1 increases quickly, the processing circuit retards the front air control function. It
only allows the front air control to recognize an ambient temperature increase of 0.33

°

C (0.6

°

F) per 100 sec-

onds.
This prevents constant adjustments due to momentary conditions, such as stopping after high speed driving.
Although the actual ambient temperature has not changed, the temperature detected by ambient sensor 1 will
increase. This is because the heat from the engine compartment can radiate to the front grille area, location of
ambient sensor 1.

DIAGNOSTIC PROCEDURE FOR AMBIENT SENSOR 1

SYMPTOM: Ambient sensor 1 circuit is open or shorted. [40 or 41 is
indicated on the navi screen (only if equipped) as a result of conduct-
ing the front air control self-diagnosis].

1.

CHECK VOLTAGE BETWEEN AMBIENT SENSOR 1 AND GROUND

1.

Disconnect ambient sensor 1 connector.

2.

Turn ignition switch ON.

3.

Check voltage between ambient sensor 1 harness connector E1
terminal 1 and ground.

OK or NG

OK

>> GO TO 2.

NG

>> GO TO 4.

LJIA0192E

WJIA1141E

1 - Ground

: Approx. 5V

WJIA1273E

ATC-118

TROUBLE DIAGNOSIS

2006 Pathfinder

2.

CHECK CIRCUIT CONTINUITY BETWEEN AMBIENT SENSOR 1 AND FRONT AIR CONTROL

1.

Turn ignition switch OFF.

2.

Disconnect front air control connector.

3.

Check continuity between ambient sensor 1 harness connector
E1 terminal 2 and front air control harness connector M49 termi-
nal 13.

OK or NG

OK

>> GO TO 3.

NG

>> Repair harness or connector.

3.

CHECK AMBIENT SENSOR 1

Check ambient sensor 1. Refer to

ATC-119, "Ambient Sensor 1"

.

OK or NG

OK

>> 1. Replace front air control. Refer to

ATC-127, "FRONT AIR CONTROL"

.

2. Go to

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

and perform self-diagnosis.

NG

>> 1. Replace ambient sensor 1. Refer to

ATC-128, "AMBIENT SENSOR"

.

2. Go to

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

and perform self-diagnosis.

4.

CHECK CIRCUIT CONTINUITY BETWEEN AMBIENT SENSOR 1 AND FRONT AIR CONTROL

1.

Turn ignition switch OFF.

2.

Disconnect front air control connector.

3.

Check continuity between ambient sensor 1 harness connector
E1 (B) terminal 1 and front air control harness connector M50
(A) terminal 28.

4.

Check continuity between ambient sensor 1 harness connector
E1 terminal 2 and ground.

OK or NG

OK

>> 1. Replace front air control. Refer to

ATC-127, "FRONT AIR CONTROL"

.

2. Go to

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

and perform self-diagnosis.

NG

>> Repair harness or connector.

2 - 13

: Continuity should exist.

WJIA1274E

A

B

Connector

Terminal Connector

Terminal

Continuity

Front air control:

M50

28

Ambient sensor 1:

E1

1

Yes

B

Continuity

Connector

Terminal

Ground

No

Ambient Sensor 1:

E1

1

WJIA1653E

TROUBLE DIAGNOSIS

ATC-119

C

D

E

F

G

H

I

K

L

M

A

B

ATC

2006 Pathfinder

COMPONENT INSPECTION
Ambient Sensor 1

After disconnecting ambient sensor 1 (1) connector E1, measure
resistance between terminals 1 and 2 at sensor component side,
using the table below.

●

⇐

: Front

NOTE:
Both of the ambient sensors are located behind the front grille, below
the hood latch. The upper ambient sensor 1 (1) provides input for the
automatic A/C system. The lower ambient sensor 2 (2) provides
input for the compass/temperature driver information system.

If NG, replace ambient sensor 1.

Temperature

°

C (

°

F)

Resistance k

Ω

−

15 (5)

12.73

−

10 (14)

9.92

−

5 (23)

7.80

0 (32)

6.19

5 (41)

4.95

10 (50)

3.99

15 (59)

3.24

20 (68)

2.65

25 (77)

2.19

30 (86)

1.81

35 (95)

1.51

40 (104)

1.27

45 (113)

1.07

WJIA1981E

ATC-120

TROUBLE DIAGNOSIS

2006 Pathfinder

In-vehicle Sensor Circuit

EJS004PI

COMPONENT DESCRIPTION
In-vehicle Sensor

The in-vehicle sensor is located on cluster lid D. It converts varia-
tions in temperature of passenger compartment air (drawn in through
the integrated fan) into a resistance value. It is then input into the
front air control.

DIAGNOSTIC PROCEDURE FOR IN-VEHICLE SENSOR

SYMPTOM: In-vehicle sensor circuit is open or shorted. (44 or 46 is
indicated on front air control display as a result of conducting self-
diagnosis.)

1.

CHECK IN-VEHICLE SENSOR CIRCUIT

Is self-diagnostic codes 44 or 46 present? Refer to

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

.

YES or NO

YES

>> GO TO 6.

NO

>> GO TO 2.

WJIA1145E

WJIA0606E

WJIA1146E