Nissan Cube. Instruction — part 557
HAC-66
< DTC/CIRCUIT DIAGNOSIS >
[AUTOMATIC AIR CONDITIONING]
A/C AUTO AMP.
A/C AUTO AMP.
Description
INFOID:0000000009951013
A/C AUTO AMP. (AIR CONDITIONER AUTOMATIC AMPLIFIER)
• The A/C auto amp. has a built-in microcomputer which processes
information sent from various sensors needed for air conditioner
operation.
• The air mix door motor, mode door motor, intake door motor,
blower motor and the compressor are then controlled.
• The A/C auto amp. is unitized with control mechanism. Signal from
various switches are directly entered into A/C auto amp.
• Self-diagnosis functions are also built into A/C auto amp. to pro-
vide quick check of malfunctions in the auto air conditioner system.
Component Function Check
INFOID:0000000009951014
1.
CHECK OPERATION
1.
Confirm that “AUTO” is indicated on the display by operating the AUTO switch.
2.
Operate the temperature control switch. Check that the fan speed or discharge air changes (the discharge
air temperature or fan speed varies depending on the ambient temperature, in-vehicle temperature, and
set temperature).
Does it operate normally?
YES
>> INSPECTION END
NO
>> Perform the diagnosis for the A/C auto amp. Refer to
Diagnosis Procedure
INFOID:0000000009951015
1.
CHECK A/C AUTO AMP. POWER SUPPLY CIRCUIT AND GROUND CIRCUIT
Check A/C auto amp. power supply circuit and ground circuit. Refer to
HAC-64, "A/C AUTO AMP. : Diagnosis
.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Repair or replace parts depending on the inspection results.
JPIIA1743ZZ
A/C AUTO AMP.
HAC-67
< ECU DIAGNOSIS INFORMATION >
[AUTOMATIC AIR CONDITIONING]
C
D
E
F
G
H
J
K
L
M
A
B
HAC
N
O
P
ECU DIAGNOSIS INFORMATION
A/C AUTO AMP.
Reference Value
INFOID:0000000009951016
TERMINAL LAYOUT
PHYSICAL VALUES
JPIIA1672ZZ
Terminal No.
(Wire color)
Description
Condition
Value
(Approx.)
+
−
Signal name
Input/
Output
2
(R)
Ground
A/C auto amp. connecting
recognition signal
Output
Ignition switch ON
5 V
3
(R)
Ground
Intake door motor PBR pow-
er supply
Output
Ignition switch ON
5 V
4
(LG)
Ground
Battery power supply
—
Ignition switch OFF
Battery voltage
5
(O)
Ground
IGN power supply
—
Ignition switch ON
Battery voltage
6
(R/W)
Ground
Sensor ground
—
Ignition switch ON
0 V
9
(Y)
Ground
IGN2 power supply
—
Ignition switch ON
Battery voltage
12
(L)
Ground
FRE
Intake door motor
drive signal
Output
• Ignition switch ON
• Intake switch REC
→
FRE
12 V
• Ignition switch ON
• Intake switch FRE
→
REC
0 V
13
(G)
Ground
REC
Intake door motor
drive signal
• Ignition switch ON
• Intake switch REC
→
FRE
0 V
• Ignition switch ON
• Intake switch FRE
→
REC
12 V
16
(B)
Ground
Ground
—
Ignition switch ON
0 V
17
(BR)
Ground
A/MIX
drive 4
Air mix door motor
drive signal
Output
• Ignition switch ON
• Right after the temperature
control switch operation
18
(SB)
A/MIX
drive 3
19
(GR)
A/MIX
drive 2
20
(P)
A/MIX
drive 1
JPIIA1647GB
HAC-68
< ECU DIAGNOSIS INFORMATION >
[AUTOMATIC AIR CONDITIONING]
A/C AUTO AMP.
21
(BR)
Ground
Engine coolant temperature
signal
Input
• Ignition switch ON
• Engine idling [Approximately
20
°
C (68
°
F)]
• Ignition switch ON
• Engine idling [Approximately
80
°
C (176
°
F)]
22
(PU/W)
Ground
Ambient sensor signal
Input
—
0 – 4.8 V
Output voltage varies with ambient
temperature
23
(O)
Ground
Intake sensor signal
Input
—
0 – 4.8 V
Output voltage varies with intake
temperature
24
(G)
Ground
In-vehicle sensor signal
Input
—
0 – 4.8 V
Output voltage varies with in-vehi-
cle temperature
25
(P)
Ground
Sunload sensor signal
Input
—
0 – 4.8 V
Output voltage varies with sun load
26
(SB)
Ground
Intake door motor PBR feed-
back signal
Input
• Ignition switch ON
• REC position
0.5 V
• Ignition switch ON
• FRE position
4.5 V
29
(GR)
Ground
MODE
drive 4
Mode door motor
drive signal
Output
• Ignition switch ON
• Right after MODE switch op-
eration
30
(W)
MODE
drive 3
31
(Y)
MODE
drive 2
32
(V)
MODE
drive 1
Terminal No.
(Wire color)
Description
Condition
Value
(Approx.)
+
−
Signal name
Input/
Output
PKID0590E
SKIB3651J
JPIIA1647GB
A/C AUTO AMP.
HAC-69
< ECU DIAGNOSIS INFORMATION >
[AUTOMATIC AIR CONDITIONING]
C
D
E
F
G
H
J
K
L
M
A
B
HAC
N
O
P
34
(Y/G)
Ground
A/C ON signal
Output
• Ignition switch ON
• A/C switch: ON
• Ignition switch ON
• A/C switch: OFF
35
(G/W)
Ground
Blower fan ON signal
Output
• Ignition switch ON
• Fan speed: 1st speed (man-
ual)
36
(GR/R)
Ground
Power transistor control sig-
nal
Output
• Ignition switch ON
• Fan speed: 1st speed (man-
ual)
Terminal No.
(Wire color)
Description
Condition
Value
(Approx.)
+
−
Signal name
Input/
Output
ZJIA1036J
SJIA1425J
SJIA1425J
ZJIA0863J
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