Nissan Xterra. Manual - part 461

HAC-42

< DTC/CIRCUIT DIAGNOSIS >

[MANUAL AIR CONDITIONER]

POWER SUPPLY AND GROUND CIRCUIT FOR CONTROLLER

SYMPTOM: A/C system does not come on. 

1.

CHECK POWER SUPPLY CIRCUITS FOR FRONT AIR CONTROL

1. Turn ignition switch OFF.

2. Disconnect front air control connector.

3. Turn ignition switch ON.

4. Check voltage between front air control harness connectors M50 terminal 15 and M2 terminal 27, and

ground.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Check 10A fuses [Nos. 8 and 19, located in the fuse block (J/B)]. Refer to 

PG-68, "Terminal

Arrangement"

.

• If fuses are OK, check harness for open circuit. Repair or replace as necessary.

• If fuses are NG, replace fuse and check harness for short circuit. Repair or replace as neces-

sary.

2.

CHECK GROUND CIRCUIT FOR FRONT AIR CONTROL

1. Turn ignition switch OFF.

2. Check continuity between front air control harness connector M2 terminal 35 and ground.

Is the inspection result normal?

YES

>> Replace front air control. Refer to 

VTL-7, "Removal and Installation"

.

NO

>> Repair harness or connector.

AWIIA1786GB

Terminals

Ignition switch position

(+)

(-)

OFF

ACC

ON

Front air 

control 

connector

Terminal No.

M50

15

Ground

Approx. 0V

Approx. 0V

Battery 
voltage

M2

27 

Battery 
voltage

Battery 
voltage

Battery 
voltage

35 - Ground

: Continuity should exist.

AIR CONDITIONER CONTROL

HAC-43

< ECU DIAGNOSIS INFORMATION >

[MANUAL AIR CONDITIONER]

C

D

E

F

G

H

J

K

L

M

A

B

HAC

N

O

P

ECU DIAGNOSIS INFORMATION

AIR CONDITIONER CONTROL

Front Air Control Terminals Reference Values

INFOID:0000000009482491

Measure voltage between each terminal and ground by following

Terminals and Reference Values for front air control.

FRONT AIR CONTROL HARNESS CONNECTOR TERMINAL LAYOUT

TERMINALS AND REFERENCE VALUES FOR FRONT AIR CONTROL 

AWIIA1217ZZ

AWIIA0441ZZ

Terminal 

No.

Wire 

color

Item

Ignition 

switch

Condition

Voltage (V)

(Approx.)

3

P

Ground for mode door motor and air 
mix door motor PBR

 ON

-

0V

4

W

Compressor ON signal

ON

A/C switch OFF

5V

ON

A/C switch ON

0V

5

R

Front blower monitor

ON

Front blower motor OFF

Battery voltage

Front blower motor ON

0V

6

SB

Air mix door motor feedback

ON

-

0 - 5V

8

G

Illumination +

ON

Park lamps ON

Battery voltage

9

BR

Illumination -

-

Park lamps ON

10

V

Mode door motor feedback

ON

-

0 - 5V

11

L

Intake sensor

ON

-

0 - 5V

13

LG

Variable blower control

 ON

Blower speed (low)

1.7V

Blower speed (hi)

4.5V

15

W/G

Power supply for IGN

ON

-

Battery voltage

16

Y

Rear defroster request

ON

-

Battery voltage

PIIA2344E

HAC-44

< ECU DIAGNOSIS INFORMATION >

[MANUAL AIR CONDITIONER]

AIR CONDITIONER CONTROL

17

GR

Air mix door motor CCW

ON

Counterclockwise rotation

Battery voltage

18

BG

Air mix door motor CW

ON

Clockwise rotation

Battery voltage

21

BG

Intake door motor CCW

ON

Counterclockwise rotation

Battery voltage

22

Y

Intake door motor CW

ON

Clockwise rotation

Battery voltage

23

R

Mode door motor CCW

ON

Counterclockwise rotation

Battery voltage

24

BR

Mode door motor CW

ON

Clockwise rotation

Battery voltage

26

V

Sensor ground

ON

-

0V

27

R/Y

Power supply for BAT

-

-

Battery voltage

28

G

Power supply for mode door motor 
and air mix door motor PBR

ON

-

 5V

35

B

Ground

-

-

0V

36

P

CAN-L

ON

-

0 - 5V

37

L

CAN-H

ON

-

0 - 5V

Terminal 

No.

Wire 

color

Item

Ignition 

switch

Condition

Voltage (V)

(Approx.)

AIR CONDITIONER CONTROL

HAC-45

< WIRING DIAGRAM >

[MANUAL AIR CONDITIONER]

C

D

E

F

G

H

J

K

L

M

A

B

HAC

N

O

P

WIRING DIAGRAM

AIR CONDITIONER CONTROL

Wiring Diagram

INFOID:0000000009482492

ABIWA0372GB