Infiniti QX56 (Z62). Manual — part 788
A/C AUTO AMP.
HAC-43
< ECU DIAGNOSIS INFORMATION >
[AUTOMATIC AIR CONDITIONING]
C
D
E
F
G
H
J
K
L
M
A
B
HAC
N
O
P
TERMINAL LAYOUT
PHYSICAL VALUES
RR XM
Ignition switch ON
—
Value according to target air
flow temperature (rear side)
ENG COOL TEMP
Ignition switch ON
—
Equivalent to engine coolant
temperature
VEHICLE SPEED
Driving
—
Equivalent to speedometer
reading
Monitor item
Condition
Value/Status
JMIIA0787ZZ
Terminal No.
(Wire color)
Description
Condition
Value
(Approx.)
+
−
Signal name
Input/
Output
1
(L)
—
CAN-H
Input/
Output
—
—
2
(B)
—
Ground
—
—
—
3
(Y/G)
Ground
Battery power supply
Input
Ignition switch OFF
Battery voltage
4
(V)
Ground
ACC power supply
Input
Ignition switch ACC
Battery voltage
5
*1
(W)
Ground
Ionizer (ON/OFF) control
signal
Output
Ignition
switch
ON
Front blower
motor: ON
0 V
Front blower
motor: OFF
12 V
6
(V/W)
Ground
A/C auto amp. connection
recognition signal
Output
Ignition switch ON
12 V
7
(W/R)
Ground
Ambient sensor signal
Input
Ignition switch ON
0 – 4.8 V
Output voltage varies with ambient
temperature
8
(GR/L)
Ground
Rear in-vehicle sensor sig-
nal
Input
Ignition switch ON
0 – 4.8 V
Output voltage varies with in-vehi-
cle temperature (rear side)
9
(BR)
Ground
Sunload sensor (driver side)
signal
Input
Ignition switch ON
0 – 4.8 V
Output voltage varies with sunload
(driver side) amount
10
*1
(V/W)
Ground
Exhaust gas / outside odor
detecting sensor signal
Input
Ignition switch ON
NOTE:
The signal is depending
on measurement environ-
ment of the vehicle
ZJIA1163J
HAC-44
< ECU DIAGNOSIS INFORMATION >
[AUTOMATIC AIR CONDITIONING]
A/C AUTO AMP.
11
(W)
Ground
Communication signal
(A/C auto amp.
→
Rear A/C
control)
Output
Ignition switch ON
14
(O/L)
Ground
Front blower motor control
signal
Output
• Ignition switch ON
• Front fan speed: 1st
speed (manual)
16
(R/G)
Ground
Each door motor LIN signal
Input/
Output
Ignition switch ON
17
(L/Y)
Ground
Each door motor power sup-
ply
Output
Ignition switch ON
12 V
21
(P)
—
CAN-L
Input/
Output
—
—
22
(B)
—
Ground
—
—
—
23
(GR/L)
Ground
Ignition power supply
Input
Ignition switch ON
Battery voltage
25
*1, *
(R)
—
—
—
—
—
26
(B)
—
Sensor ground
—
—
—
27
(GR)
Ground
Front in-vehicle sensor sig-
nal
Input
Ignition switch ON
0 – 4.8 V
Output voltage varies with in-vehi-
cle temperature (front side)
28
(R)
Ground
Intake sensor signal
Input
Ignition switch ON
0 – 4.8 V
Output voltage varies with front
evaporator fin temperature
29
(O)
Ground
Sunload sensor (passenger
side) signal
Input
Ignition switch ON
0 – 4.8 V
Output voltage varies with sunload
(passenger side) amount
31
(O/L)
Ground
Communication signal
(Rear A/C control
→
A/C auto
amp.)
Input
Ignition switch ON
Terminal No.
(Wire color)
Description
Condition
Value
(Approx.)
+
−
Signal name
Input/
Output
SJIA1521J
JSIIA0096ZZ
SJIA1453J
SJIA1522J
A/C AUTO AMP.
HAC-45
< ECU DIAGNOSIS INFORMATION >
[AUTOMATIC AIR CONDITIONING]
C
D
E
F
G
H
J
K
L
M
A
B
HAC
N
O
P
*1: With ACCS (advanced climate control system)
*2: A/C auto amp. is not used for control.
Fail-safe
INFOID:0000000006275887
FAIL-SAFE FUNCTION
If a communication error exists between the A/C auto amp., and the AV control unit and preset switch for 30
seconds or longer, air conditioning is controlled under the following conditions:
When ambient temperature is less than 3
°
C (37
°
F) and engine coolant temperature is less than 56
°
C (133
°
F)
When ambient temperature is 3
°
C (37
°
F) or more, or engine coolant temperature is 56
°
C (133
°
F) or more
DTC Index
INFOID:0000000006275888
34
(L/O)
Ground
Rear blower motor control
signal
Output
• Ignition switch ON
• Rear fan speed: 1st
speed (manual)
37
(B)
—
Ground
—
—
—
38
(G/W)
Ground
Rear A/C relay control signal
Output
Ignition
switch
ON
Rear blower
motor: ON
0 V
Rear blower
motor: OFF
12 V
Terminal No.
(Wire color)
Description
Condition
Value
(Approx.)
+
−
Signal name
Input/
Output
JSIIA0096ZZ
Compressor
: ON
Air outlet
: DEF
Air inlet
: FRE (Fresh air intake)
Blower fan speed
: AUTO
Set temperature
: Setting before communication error occurs
Compressor
: ON
Air outlet
: AUTO
Air inlet
: 20% FRE (20% fresh air intake)
Blower fan speed
: AUTO
Set temperature
: Setting before communication error occurs
DTC
Items
(CONSULT-III screen terms)
Reference
U1000
CAN COMM CIRCUIT
U1010
CONTROL UNIT (CAN)
B2578
IN-VEHICLE SENSOR
B2579
IN-VEHICLE SENSOR
B257B
AMBIENT SENOR
B257C
AMBIENT SENOR
B2581
INTAKE SENSOR
B2582
INTAKE SENSOR
HAC-46
< ECU DIAGNOSIS INFORMATION >
[AUTOMATIC AIR CONDITIONING]
A/C AUTO AMP.
*1: With ACCS (advanced climate control system)
*2: Perform self-diagnosis under sunshine. When performing indoors, aim a light (more than 60 W) at sunload
sensor, otherwise self-diagnosis indicates even though the sunload sensor is functioning normally.
NOTE:
If all of door motor DTCs (B2632, B2633, B2634, B2635, B2636, B2637, B2638, B2639, B263D, B263E,
B263F, B2654, B2655, B2661, B2662, B2663, B2664, B2665, B2666, B2669, and B266A) are detected, check
door motor communication circuit. Refer to
HAC-120, "Diagnosis Procedure"
B262A
*1
GAS SENSOR
B262B
*1
GAS SENSOR
B2630
*2
SUNLOAD SENSOR
B2631
*2
SUNLOAD SENSOR
B2632
DR AIRMIX DOOR MOT
B2633
DR AIRMIX DOOR MOT
B2634
PASS AIR MIX DOOR MOT
B2635
PASS AIR MIX DOOR MOT
B2636
DR VENT DOOR FAIL
B2637
DR B/L DOOR FAIL
B2638
DR D/F1 DOOR FAIL
B2639
DR DEF DOOR FAIL
B263D
FRE DOOR FAIL
B263E
20P FRE DOOR FAIL
B263F
REC DOOR FAIL
B2654
D/F2 DOOR FAIL
B2655
B/L2 DOOR FAIL
B2657
*1
GAS SENSOR CIRCUIT
B2658
*1
GAS SENSOR CIRCUIT
B2661
UPPER VENT DOOR MOT
B2662
UPPER VENT DOOR MOT
B2663
UPPER VENT DOOR MOT
B2664
REAR AIR MIX DOOR MOT
B2665
REAR AIR MIX DOOR MOT
B2666
REAR MODE DOOR MOT
B2667
*2
PASS SUNLOAD SENSOR
B2668
*2
PASS SUNLOAD SENSOR
B2669
REAR MODE DOOR MOT
B266A
REAR MODE DOOR MOT
B266B
REAR IN-VEHICLE SEN
B266C
REAR IN-VEHICLE SEN
B27B0
A/C AUTO AMP.
DTC
Items
(CONSULT-III screen terms)
Reference
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