Nissan Pathfinder (2007 year). Instruction — part 55

TROUBLE DIAGNOSIS

ATC-91

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ATC

2007 Pathfinder

17.

CHECK REAR FAN SWITCH (FRONT) CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect rear air control connector.

3.

Check continuity between rear blower switch (front) connector
M52 (A) terminals 3, 5, 7), and 8, and rear air control connector
R208 (B) terminals 9, 6, 8, and 7.

OK or NG

OK

>> GO TO 18.

NG

>> Repair harness or connector.

18.

CHECK REAR BLOWER SWITCH (FRONT)

Refer to

ATC-92, "Rear Blower Switch (Front)"

.

OK or NG

OK

>> GO TO 19.

NG

>> Replace rear blower switch (front). Refer to

ATC-131, "FRONT AIR CONTROL"

.

19.

CHECK REAR BLOWER SWITCH (REAR) IN REAR AIR CONTROL

Refer to

ATC-92, "Rear Air Control"

.

OK or NG

OK

>> Repair harness between rear blower motor and rear blower switch (front) or rear air control.

NG

>> Replace rear air control. Refer to

ATC-131, "REAR AIR CONTROL"

.

20.

CHECK CIRCUIT BETWEEN FRONT AIR CONTROL AND FUSE BLOCK (J/B) [REAR BLOWER

MOTOR RELAY (COIL SIDE) POWER]

1.

Disconnect rear blower motor relay and fuse block (J/B) connec-
tors M3.

2.

Check continuity between rear blower motor relay harness con-
nector M163 terminal 2 and fuse block (J/B) connector M3 termi-
nal 5N.

OK or NG

OK

>> Replace rear blower motor relay.

NG

>> Repair harness or connector.

A

B

Connector

Terminal Connector

Terminal

Continuity

Rear blower switch

(front): M52

3

Rear air control:

M208

9

Yes

Rear blower switch

(front): M52

5

Rear air control:

M208

6

Yes

Rear blower switch

(front): M52

7

Rear air control:

M208

8

Yes

Rear blower switch

(front): M52

8

Rear air control:

M208

7

Yes

WJIA1652E

Continuity should exist.

WJIA1129E

ATC-92

TROUBLE DIAGNOSIS

2007 Pathfinder

COMPONENT INSPECTION
Rear Blower Motor Relay

Check circuit continuity between terminals by supplying 12 volts and
ground to coil side terminals of relays.

Rear Air Control

Check continuity between terminals at each switch position.

Rear Blower Switch (Front)

Check continuity between terminals at each switch position.

LJIA0068E

WJIA1130E

WJIA1284E

TROUBLE DIAGNOSIS

ATC-93

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ATC

2007 Pathfinder

Rear Blower Motor

Check that there are no foreign particles inside the intake unit.
Apply 12 volts to terminal 1 and ground to terminal 2 and ensure that
the blower motor rotates freely and quietly.

Rear Blower Motor Resistor

Check continuity between terminals. There will be resistance, but
there should not be an open or short between any two terminals.

WJIA1268E

WJIA1269E

ATC-94

TROUBLE DIAGNOSIS

2007 Pathfinder

Rear Air Control Circuit

EJS004PA

SYMPTOM:

●

Temperature cannot be adjusted from the rear air control.

INSPECTION FLOW

1.

CONFIRM SYMPTOM BY PERFORMING OPERATIONAL CHECK - TEMPERATURE INCREASE

1.

Press AUTO switch (rear blower only operates when front blower is on).

2.

Turn the rear blower motor on (1-4 speed).

3.

Turn the rear temperature/mode control dial clockwise.

4.

Check for hot air at rear foot discharge air outlets.

>> GO TO 2.

2.

CONFIRM SYMPTOM BY PERFORMING OPERATIONAL CHECK - TEMPERATURE DECREASE

1.

Turn the rear temperature/mode control dial counterclockwise.

2.

Check for cold air at rear vent discharge air outlets.

OK or NG

OK

>> GO TO 3.

NG

>> GO TO 4.

3.

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.

4.

CHECK FOR SERVICE BULLETINS

Check for any service bulletins.

>> GO TO 5.

5.

PERFORM SELF-DIAGNOSIS

Perform self-diagnosis to check for any codes. Refer to

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

.

Are any self-diagnosis codes present?

YES

>> Refer to

ATC-51, "SELF-DIAGNOSIS CODE CHART"

.

NO

>> GO TO 6.

6.

CHECK REAR TEMPERATURE/MODE CONTROL DIAL OPERATION

Check and verify rear outlet position and temperature change when adjusted from front air control.

OK or NG?

OK

>> Check rear air control circuit. Refer to

ATC-95, "DIAGNOSTIC PROCEDURE FOR REAR AIR

CONTROL"

.

NG

>> Check air mix door motor (rear). Refer to

ATC-70, "DIAGNOSTIC PROCEDURE FOR AIR MIX

DOOR MOTOR (REAR)"

.

TROUBLE DIAGNOSIS

ATC-95

C

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ATC

2007 Pathfinder

SYSTEM DESCRIPTION
Component Parts

Rear air control system components are:

●

Front air control

●

Rear air control

●

Air mix door motor (rear)

●

Rear blower motor relay

●

Rear blower motor resistor

●

Rear blower motor

System Operation

Rear Air Control

When the rear fan switch (front) (integral to the front air control) is in the REAR position the rear blower motor
speeds and the rear temperature/mode are controlled by the rear fan switch (rear) and the rear temperature
switch (rear) (both integral to the rear air control).

DIAGNOSTIC PROCEDURE FOR REAR AIR CONTROL

SYMPTOM:

●

Blower motor operation is malfunctioning. Refer to

ATC-83, "Rear Blower Motor Circuit"

.

●

Temperature/mode operation is malfunctioning.

1.

CHECK OPERATION FROM FRONT AIR CONTROL

Does rear temperature/mode operate normally from front air control?

YES or NO

YES

>> GO TO 2.

NO

>> Refer to

ATC-70, "DIAGNOSTIC PROCEDURE FOR AIR MIX DOOR MOTOR (REAR)"

.

WJIA1132E

ATC-96

TROUBLE DIAGNOSIS

2007 Pathfinder

2.

CHECK CIRCUIT BETWEEN REAR AIR CONTROL AND FRONT AIR CONTROL FOR OPEN AND

SHORT

1.

Turn ignition switch OFF.

2.

Disconnect front air control and rear air control connectors.

3.

Check continuity between front air control harness connector
M49 terminal 24 and rear air control harness connector M209
terminal 5.

4.

Check continuity between rear air control harness connector
M209 terminal 5 and ground.

OK or NG

OK

>> GO TO 3.

NG

>> Repair harness or connector.

3.

CHECK CIRCUIT BETWEEN REAR AIR CONTROL AND AIR MIX DOOR MOTOR (REAR) FOR OPEN

OR SHORT

1.

Disconnect air mix door motor (rear) connector.

2.

Check continuity between rear air control harness connector
M209 terminal 2 and 4 and air mix door motor (rear) harness
connector B155 terminal 2 and 3.

3.

Check continuity between rear air control harness connector
M209 terminals 2 and 4 and ground.

OK or NG

OK

>> Replace rear air control. Refer to

ATC-131, "REAR AIR CONTROL"

.

NG

>> Repair harness or connector.

24 - 5

Continuity should exist.

5 - Ground

Continuity should not exist.

WJIA1133E

2 - 2

Continuity should exist.

4 - 3

Continuity should exist.

2, 4 - Ground

Continuity should not exist.

WJIA1271E

TROUBLE DIAGNOSIS

ATC-97

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ATC

2007 Pathfinder

Magnet Clutch Circuit

EJS004PB

SYMPTOM: Magnet clutch does not engage.

INSPECTION FLOW

1.

CONFIRM SYMPTOM BY PERFORMING OPERATIONAL CHECK - MAGNET CLUTCH

1.

Turn ignition switch ON.

2.

Press vent switch (

).

3.

Press the A/C switch.

4.

Display shows

, A/C. Confirm that the compressor clutch engages (sound or visual inspection). (Dis-

charge air and blower speed will depend on ambient, in-vehicle and set temperatures.)

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 4.

4.

PERFORM SELF-DIAGNOSIS

Perform self-diagnosis to check for any codes. Refer to

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

.

Are any self-diagnosis codes present?

YES

>> Refer to

ATC-51, "SELF-DIAGNOSIS CODE CHART"

.

NO

>> GO TO 5.

5.

CHECK AMBIENT SENSOR

Check and verify ambient sensor circuit. Refer to

ATC-121, "Ambient Sensor 1 Circuit"

.

>> GO TO 6.

6.

CHECK INTAKE SENSOR

Check and verify intake sensor circuit. Refer to

ATC-129, "Intake Sensor Circuit"

.

>> GO TO 7.

7.

RECHECK 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

>> Replace front air control. Refer to

ATC-131, "FRONT AIR CONTROL"

.

ATC-98

TROUBLE DIAGNOSIS

2007 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-50, "A/C System Self-diagnosis Function"

.

OK or NG

OK

>> GO TO 2.

NG

>> Malfunctioning intake sensor. Refer to

ATC-129, "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