Nissan Altima L32. Manual — part 822
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HAC-62
< COMPONENT DIAGNOSIS >
[AUTOMATIC AIR CONDITIONER]
POWER SUPPLY AND GROUND CIRCUIT FOR FRONT AIR CONTROL
SYMPTOM: A/C system does not come on.
1.
CHECK POWER SUPPLY CIRCUIT FOR FRONT AIR CONTROL
1. Disconnect front air control connector M37.
2. Press ignition switch ON.
3. Check voltage between front air control connector M37 termi-
nals 19, 39 and 40, and ground.
Is the inspection result normal?
YES
>> GO TO 2
NO
>> Check the following.
• 10A fuses [Nos. 6, 19, and 3, located in the fuse block (J/B)].
• If fuses are OK, check for open circuit in wiring harness. Repair or replace as necessary.
• If fuses are NG, replace fuse and check wiring harness for short circuit. Repair or replace as
necessary.
2.
CHECK BODY GROUND CIRCUIT FOR FRONT AIR CONTROL
1. Press ignition switch OFF.
2. Check continuity between front air control connector M37 termi-
nals 17and 37 and ground.
Is the inspection result normal?
YES
>> • Replace front air control. Refer to
VTL-8, "Removal and Installation"
.
• Inspection End.
NO
>> Repair or replace harness.
AWIIA0642GB
Terminals
Voltage (V)
(Approx.)
(+)
(-)
Connector - Terminal
Body ground
12V
M37-19
M37-39
M37-40
AWIIA0613ZZ
Terminal
Continuity
(+)
(-)
Connector - Terminal
Body ground
Yes
M37-17
M37-37
AWIIA0620ZZ
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AIR CONDITIONER CONTROL
HAC-63
< 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
Reference Value
INFOID:0000000004498230
VALUES ON THE DIAGNOSIS TOOL
Display Item List
TERMINAL LAYOUT
PHYSICAL VALUES
Monitor item name
“operation or unit”
Contents
FAN ON SIG
“ON/OFF” Displays “FAN (ON)/FAN (OFF)” status as judged from blower fan motor switch signal.
AIR COND SW
“ON/OFF”
Displays “COMP (ON)/COMP (OFF)” status as judged from air conditioner switch signal.
AWIIA0052ZZ
Termi-
nal No.
Wire
color
Item
Ignition
switch
Condition
Voltage (V)
(Approx.)
1
L/Y
Blower motor feed back
Fan speed
Low
7.0.- 10.0
3
L/R
A/C LAN signal
—
5.5
5
SB
Compressor ON signal
Compressor
ON
0
OFF
12
7
O
Sunload sensor
—
0 - 5
9
G/W
Water temperature sensor
—
—
16
R/L
Light (+)
Lighting
switch
OFF
0
1st position
12
17
B
Ground
—
0
18
W/L
Power supply for IGN
—
12
19
V/Y
Power supply for ACC
ACC
—
12
20
L/W
Power supply for mode door
motor, intake door motor, and
air mix door motor LH and RH
—
12
21
R/W
Power supply for A/C ON signal
ON
4.6
22
GR
Rear defrost feed back
Defroster
switch
ON
12
OFF
0
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HAC-64
< ECU DIAGNOSIS >
[AUTOMATIC AIR CONDITIONER]
AIR CONDITIONER CONTROL
23
GR/W
Rear defrost ON signal
Defroster
switch
ON
0
OFF
12
24
BR/W
Fan ON signal
Fan
ON
0
OFF
5
25
R/G
Intake sensor
—
0 - 5
26
B/Y
Sensor ground
—
0
27
LG
In-vehicle sensor
—
0 - 5
28
O/B
Ambient sensor
—
5
31
P
Ambient sensor VDD
—
5
36
R/Y
Light (-)
—
0
37
B
Ground
—
0
39
Y/R
Power supply for battery
—
12
40
G
Power supply for IGN
—
12
Termi-
nal No.
Wire
color
Item
Ignition
switch
Condition
Voltage (V)
(Approx.)
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AIR CONDITIONER CONTROL
HAC-65
< ECU DIAGNOSIS >
[AUTOMATIC AIR CONDITIONER]
C
D
E
F
G
H
J
K
L
M
A
B
HAC
N
O
P
Wiring Diagram - Air Conditioner Control (Auto) - Coupe
INFOID:0000000004498231
ABIWA0027GB
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