Nissan Pathfinder (2008 year). Manual — part 443
HAC-88
< COMPONENT DIAGNOSIS >
[AUTOMATIC AIR CONDITIONER]
POWER SUPPLY AND GROUND CIRCUIT FOR CONTROLLER
Is the inspection result normal?
YES
>> System OK.
NO
>> Replace A/C auto amp. Refer to
VTL-8, "Removal and Installation"
A/C Auto Amp Power and Ground Diagnosis Procedure
INFOID:0000000001366745
DIAGNOSTIC PROCEDURE FOR A/C SYSTEM
SYMPTOM: A/C system does not come on.
1.
CHECK POWER SUPPLY CIRCUITS FOR A/C AUTO AMP.
1.
Disconnect A/C auto amp. connectors.
2.
Check voltage between A/C auto amp. harness connector M49
(B) terminal 15 and M50 (A) terminal 27, and ground.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>>
Check 10A fuses [Nos. 8 and 19, located in the fuse block (J/B)]. Refer to
Amp. Terminals Reference Values"
• 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 A/C AUTO AMP.
1.
Turn ignition switch OFF.
2.
Check continuity between A/C auto amp. harness connector
M50 terminal 36 and ground.
Is the inspection result normal?
OK
>> Replace A/C auto amp. Refer to
NG
>> Repair harness or connector.
AWIIA0212GB
Terminals
Ignition switch position
(+)
(-)
OFF
ACC
ON
A/C auto
amp. con-
nector
Terminal No.
M49
15
Ground
Approx. 0V
Approx. 0V
Battery
voltage
M50
27
Battery
voltage
Battery
voltage
Battery
voltage
AWIIA0215ZZ
36 - Ground
: Continuity should exist.
AWIIA0214ZZ
AIR CONDITIONER CONTROL
HAC-89
< ECU DIAGNOSIS >
[AUTOMATIC AIR CONDITIONER]
C
D
E
F
G
H
J
K
L
M
A
B
HAC
N
O
P
ECU DIAGNOSIS
AIR CONDITIONER CONTROL
A/C Auto Amp. Terminals Reference Values
INFOID:0000000001366746
Measure voltage between each terminal and ground by following
Terminals and Reference Value for A/C auto amp. (1).
A/C AUTO AMP. HARNESS CONNECTOR TERMINAL LAYOUT
TERMINALS AND RERERENCE VALUES FOR A/C AUTO AMP.
AWIIA0170ZZ
AWIIA0172ZZ
Terminal
No.
Wire
color
Item
Ignition
switch
Condition
Voltage (V)
(Approx.)
1
G
Optical sensor (driver)
ON
-
0 - 5V
2
L
Air mix door motor (passenger) CCW
ON
-
0 - 5V
3
G
V ref ACTR (ground)
ON
-
5V
4
W
Compressor ON signal
ON
A/C switch OFF
5V
ON
A/C switch ON
0V
5
R
Fan ON signal
ON
Blower switch OFF
5V
ON
Blower switch ON
0V
6
SB
Air mix door motor (driver) feedback
ON
-
0 - 5V
7
V
Mode door motor (front) feedback
ON
-
0 - 5V
8
G
Illumination +
ON
Park lamps ON
Battery voltage
9
BR
Illumination -
-
Park lamps ON
11
L
Intake sensor
ON
-
0 - 5V
12
P
Variable blower control (rear)
ON
-
0 - 5V
13
R
Variable blower control (front)
ON
-
0 - 5V
14
LG
Air mix door motor (passenger) CW
ON
Clockwise rotation
Battery voltage
PIIA2344E
HAC-90
< ECU DIAGNOSIS >
[AUTOMATIC AIR CONDITIONER]
AIR CONDITIONER CONTROL
15
W/G
Power supply for IGN
ON
-
Battery voltage
17
GR
Air mix door motor (driver) CW
ON
Clockwise rotation
Battery voltage
18
BR
Air mix door motor (driver) CCW
ON
Counterclockwise rotation
Battery voltage
19
L
Mode door motor CW (front)
ON
Clockwise rotation
Battery voltage
20
B/R
Mode door motor CCW
ON
Counterclockwise rotation
Battery voltage
21
O
Intake door motor CCW
ON
Counterclockwise rotation
Battery voltage
22
O
Intake door motor CW
ON
Clockwise rotation
Battery voltage
25
W
Ambient sensor
ON
-
0 - 5V
26
V
Sensor ground
ON
-
0V
27
R/Y
Power supply for BAT
-
-
Battery voltage
28
P
V ref ACTR (5V)
ON
-
0 - 5V
29
SB
Air mix door motor (passenger) feed-
back
ON
-
0 - 5V
30
R
Air mix door motor (Rear) feedback
ON
-
0 - 5V
31
BR
In-vehicle sensor motor (+)
ON
-
Battery voltage
32
LG
In-vehicle sensor signal
ON
-
0 - 5V
34
GY
Front aux backlight dim
ON
Headlamps OFF
Battery voltage
35
W/G
Front aux tell tale LED
ON
Tell tale OFF
Battery voltage
36
B
Ground
-
-
0V
37
GR
Front aux temp pot
ON
Rear air control (front) tem-
perature control dial
0 - 5V
38
P
Front aux blower pot
ON
Rear air control (front)
blower motor
0 - 5V
39
SB
Front AUX (rear)
ON
-
0 - 5V
40
P
CAN-L
ON
-
0 - 5V
41
L
CAN-H
ON
-
0 - 5V
42
GR
Optical sensor (passenger)
ON
-
0 - 5V
43
V
Air mix door motor (Rear) CW
ON
Clockwise rotation
Battery voltage
44
O
Air mix door motor (Rear) CCW
ON
Counterclockwise rotation
Battery voltage
45
P
Water valve (VK56DE)
ON
Water valve open
Battery voltage
Water valve closed
0V
46
R
Water valve (VK56DE)
ON
Water valve open
0V
Water valve closed
Battery voltage
50
GR
Heater pump request (VQ40DE)
ON
Heater pump on
0V
Heater pump off
Battery voltage
51
L
Rear aux temp pot
ON
Rear air control (rear) tem-
perature control dial
0 - 5V
52
W
Rear aux blower pot
ON
Rear blower motor
0 - 5V
Terminal
No.
Wire
color
Item
Ignition
switch
Condition
Voltage (V)
(Approx.)
AIR CONDITIONER CONTROL
HAC-91
< ECU DIAGNOSIS >
[AUTOMATIC AIR CONDITIONER]
C
D
E
F
G
H
J
K
L
M
A
B
HAC
N
O
P
Wiring Diagram
INFOID:0000000001366747
ALIWA0028GB
HAC-92
< ECU DIAGNOSIS >
[AUTOMATIC AIR CONDITIONER]
AIR CONDITIONER CONTROL
ALIWA0029GB
AIR CONDITIONER CONTROL
HAC-93
< ECU DIAGNOSIS >
[AUTOMATIC AIR CONDITIONER]
C
D
E
F
G
H
J
K
L
M
A
B
HAC
N
O
P
ALIWA0030GB
HAC-94
< ECU DIAGNOSIS >
[AUTOMATIC AIR CONDITIONER]
AIR CONDITIONER CONTROL
ALIIA0079GB
AIR CONDITIONER CONTROL
HAC-95
< ECU DIAGNOSIS >
[AUTOMATIC AIR CONDITIONER]
C
D
E
F
G
H
J
K
L
M
A
B
HAC
N
O
P
ALIIA0080GB
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