Nissan Pathfinder. Manual - part 714

POWER SUPPLY AND GROUND CIRCUIT

HAC-117

< DTC/CIRCUIT DIAGNOSIS >

[AUTOMATIC AIR CONDITIONING]

C

D

E

F

G

H

J

K

L

M

A

B

HAC

N

O

P

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> GO TO 4.

2.

CHECK MODE DOOR MOTOR (REAR) GROUND CIRCUIT

1. Turn ignition switch OFF.

2. Disconnect mode door motor (rear) connector.

3. Check continuity between mode door motor (rear) harness connector and ground. 

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair harness or connector.

3.

CHECK INSTALLATION OF MODE DOOR MOTOR (REAR)

Check mode door motor (rear) is properly installed. Refer to 

HAC-163, "Exploded View"

.

Is the inspection result normal?

YES

>> Replace mode door motor (rear). Refer to 

HAC-164, "MODE DOOR MOTOR : Removal and

Installation - Mode Door Motor (Rear)"

.

NO

>> Repair or replace malfunctioning part.

4.

CHECK MODE DOOR MOTOR (REAR) POWER SUPPLY CIRCUIT

1. Turn ignition switch OFF.

2. Disconnect mode door motor (rear) connector and A/C auto amp. connector.

3. Check continuity between mode door motor (rear) harness connector and A/C auto amp. harness connec-

tor. 

Is the inspection result normal?

YES

>> Replace A/C auto amp. Refer to 

HAC-157, "Removal and Installation"

.

NO

>> Repair harness or connector.

INTAKE DOOR MOTOR
INTAKE DOOR MOTOR : Diagnosis Procedure

INFOID:0000000009176857

Regarding Wiring Diagram information, refer to 

HAC-49, "Wiring Diagram"

.

1.

CHECK INTAKE MODE DOOR MOTOR POWER SUPPLY

1. Turn ignition switch ON.

2. Check voltage between intake mode door motor harness connector and ground. 

+

−

Voltage

(Approx.)

Mode door motor (rear)

Connector

Terminal

M13

1

Ground

Battery voltage

Mode door motor (rear)

—

Continuity

Connector

Terminal

M13

3

Ground

Yes

Mode door motor (rear)

A/C auto amp.

Continuity

Connector

Terminal

Connector

Terminal

M13

1

M50

17

Yes

HAC-118

< DTC/CIRCUIT DIAGNOSIS >

[AUTOMATIC AIR CONDITIONING]

POWER SUPPLY AND GROUND CIRCUIT

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> GO TO 4.

2.

CHECK INTAKE MODE DOOR MOTOR GROUND CIRCUIT

1. Turn ignition switch OFF.

2. Disconnect intake mode door motor connector.

3. Check continuity between intake mode door motor harness connector and ground. 

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair harness or connector.

3.

CHECK INSTALLATION OF INTAKE MODE DOOR MOTOR

Check intake mode door motor is properly installed. Refer to 

HAC-163, "Exploded View"

.

Is the inspection result normal?

YES

>> Replace intake mode door motor. Refer to 

HAC-165, "INTAKE DOOR MOTOR : Removal and

Installation"

.

NO

>> Repair or replace malfunctioning part.

4.

CHECK INTAKE MODE DOOR MOTOR POWER SUPPLY CIRCUIT

1. Turn ignition switch OFF.

2. Disconnect intake mode door motor connector and A/C auto amp. connector.

3. Check continuity between intake mode door motor harness connector and A/C auto amp. harness con-

nector. 

Is the inspection result normal?

YES

>> Replace A/C auto amp. Refer to 

HAC-157, "Removal and Installation"

.

NO

>> Repair harness or connector.

A/C SWITCH ASSEMBLY
A/C SWITCH ASSEMBLY : Component Function Check

INFOID:0000000009176858

WITH BASE AUDIO SYSTEM

1.

CHECK OPERATION

1. Press the AUTO switch, and then check that “AUTO” is shown on the display. 

2. Operate the temperature control switch (driver side). Check that the fan speed or outlet changes. (The

discharge air temperature or fan speed varies depending on the ambient temperature, in-vehicle tempera-

ture, and temperature setting.) 

Does it operate normally?

YES

>> Inspection End.

+

−

Voltage

(Approx.)

Intake mode door motor

Connector

Terminal

M128

1

Ground

Battery voltage

Intake mode door motor

—

Continuity

Connector

Terminal

M128

3

Ground

Yes

Intake mode door motor

A/C auto amp.

Continuity

Connector

Terminal

Connector

Terminal

M128

1

M50

17

Yes

POWER SUPPLY AND GROUND CIRCUIT

HAC-119

< DTC/CIRCUIT DIAGNOSIS >

[AUTOMATIC AIR CONDITIONING]

C

D

E

F

G

H

J

K

L

M

A

B

HAC

N

O

P

NO

>> Perform trouble diagnosis for the A/C switch assembly. Refer to 

HAC-119, "A/C SWITCH ASSEM-

BLY : Diagnosis Procedure"

.

A/C SWITCH ASSEMBLY : Diagnosis Procedure

INFOID:0000000009176859

WITH BASE AUDIO SYSTEM

Regarding Wiring Diagram information, refer to 

HAC-49, "Wiring Diagram"

.

1.

CHECK FUSE

Check 10A fuse [No. 30, located in the fuse block (J/B)].

NOTE:

Refer to 

PG-81, "Terminal Arrangement"

.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Replace the blown fuse after repairing the affected circuit.

2.

CHECK A/C SWITCH ASSEMBLY POWER SUPPLY

1. Turn ignition switch OFF.

2. Disconnect A/C switch assembly connector. 

3. Turn ignition switch ON.

4. Check voltage between A/C switch assembly connector and ground. 

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair harness or connector between A/C switch assembly and fuse block (J/B).

3.

CHECK A/C SWITCH ASSEMBLY GROUND CIRCUIT

1. Turn ignition switch OFF.

2. Check continuity between A/C switch assembly harness connector and ground. 

Is the inspection result normal?

YES

>> Replace A/C switch assembly.

NO

>> Repair harness or connector.

A/C DISPLAY UNIT
A/C DISPLAY UNIT : Diagnosis Procedure

INFOID:0000000009176860

WITH BASE AUDIO SYSTEM

Regarding Wiring Diagram information, refer to 

HAC-49, "Wiring Diagram"

.

1.

CHECK FUSE

Check 10A fuse [No. 30, located in the fuse block (J/B)].

NOTE:

Refer to 

PG-81, "Terminal Arrangement"

.

Is the inspection result normal?

+

−

Voltage

(Approx.)

A/C switch assembly

Connector

Terminal

M146

1

Ground

Battery voltage

A/C switch assembly

—

Continuity

Connector

Terminal

M146

2

Ground

Yes

HAC-120

< DTC/CIRCUIT DIAGNOSIS >

[AUTOMATIC AIR CONDITIONING]

POWER SUPPLY AND GROUND CIRCUIT

YES

>> GO TO 2.

NO

>> Replace the blown fuse after repairing the affected circuit.

2.

CHECK A/C DISPLAY UNIT POWER SUPPLY

1. Turn ignition switch OFF.

2. Disconnect A/C display unit connector. 

3. Turn ignition switch ON.

4. Check voltage between A/C display unit connector and ground. 

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair harness or connector between A/C display unit and fuse block (J/B).

3.

CHECK A/C DISPLAY UNIT GROUND CIRCUIT

1. Turn ignition switch OFF.

2. Check continuity between A/C display unit harness connector and ground. 

Is the inspection result normal?

YES

>> Replace A/C display unit.

NO

>> Repair harness or connector.

REAR SHUT-OFF DOOR MOTOR
REAR SHUT-OFF DOOR MOTOR : Diagnosis Procedure

INFOID:0000000009176861

Regarding Wiring Diagram information, refer to 

HAC-49, "Wiring Diagram"

.

1.

CHECK SHUT-OFF DOOR MOTOR POWER SUPPLY

1. Turn ignition switch ON.

2. Check voltage between shut-off door motor harness connector and ground. 

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> GO TO 4.

2.

CHECK SHUT-OFF DOOR MOTOR GROUND CIRCUIT

1. Turn ignition switch OFF.

2. Disconnect shut-off door motor connector.

3. Check continuity between shut-off door motor harness connector and ground. 

+

−

Voltage

(Approx.)

A/C display unit

Connector

Terminal

M148

6

Ground

Battery voltage

A/C display unit

—

Continuity

Connector

Terminal

M148

1

Ground

Yes

+

−

Voltage

(Approx.)

Shut-off door motor

Connector

Terminal

M12

1

Ground

Battery voltage