Infiniti QX4 (R50). Manual — part 460
MHA981A
TROUBLE DIAGNOSES
Wiring Diagram — A/C, A — (With Navigation System) (Cont’d)
HA-38
MHA982A
GI
MA
EM
LC
EC
FE
AT
TF
PD
AX
SU
BR
ST
RS
BT
SC
EL
IDX
TROUBLE DIAGNOSES
Wiring Diagram — A/C, A — (With Navigation System) (Cont’d)
HA-39
RHA464GA
RHA858H
Auto Amp. Terminals and Reference Value
NBHA0036
INSPECTION OF AUTO AMP.
NBHA0036S01
I
Measure voltage between each terminal and body ground by
following “AUTO AMP. INSPECTION TABLE”.
I
Pin connector terminal layout
RHA839H
AUTO AMP. INSPECTION TABLE
NBHA0036S02
Without Navigation System
NBHA0036S0201
TERMINAL
NO.
ITEM
CONDITION
Voltage
V
1
Intake sensor
—
—
2
Ambient sensor
—
—
3
In-vehicle sensor
—
—
6
ECM signal
Compressor: ON
Approximately 0
Ccompressor: OFF
Approximately 4.6
8
Intake door position switch
Intake door position
FRESH
Approximately 0
RECIRCULATION or 20%
FRESH
Approximately 4.6
11
Sensor ground
—
Approximately 0
12
Sunload sensor
—
—
TROUBLE DIAGNOSES
Auto Amp. Terminals and Reference Value
HA-40
TERMINAL
NO.
ITEM
CONDITION
Voltage
V
13
Thermal transmitter
Engine coolant
temperature
Approximately 30°C (86°F)
Approximately 9.4
Approximately 55°C (131°F)
Approximately 6.5
Approximately 100°C
(212°F)
Approximately 2.4
14
Ground (for Canada)
—
Approximately 0
16
A/C LAN signal
—
Approximately 5.5
18
Intake door position switch
Intake door position
20% FRE or RECIRCULA-
TION
Approximately 0
FRESH
Approximately 4.6
19
Intake door position switch
Intake door position
RECIRCULATION or
FRESH
Approximately 0
20% FRE
Approximately 4.6
21
Power supply for mode door
motor and air mix door motor
—
Approximately 12
22
Compressor ON signal
Compressor
ON
Approximately 0
OFF
Approximately 4.6
24
Power supply for illumination
Lighting switch
OFF
Approximately 0
1st
Approximately 12
25
Illumination ground
—
Approximately 0
26
Power supply for BAT
—
BATTERY VOLTAGE
27
Power supply for IGN
—
Approximately 12
28
Power supply for intake door
motor
Intake door position
FRESH
Approximately 12
RECIRC
Approximately 0
32
Ground
—
Approximately 0
33
Power source for A/C
Ignition voltage feed back
Approximately 12
34
Blower motor feed back
Fan speed: Low
Approximately 7 - 10
35
Fan control AMP. control sig-
nal
Fan speed
Low, Middle low or Middle
high
Approximately 2.5 -
3.0
High
Approximately 9 - 10
36
Power supply for intake door
motor
Intake door position
FRESH
Approximately 0
RECIRC
Approximately 12
With Navigation System
NBHA0036S0202
TERMINAL
NO.
ITEM
CONDITION
Voltage
V
1
Intake sensor
—
—
2
Ambient sensor
—
—
3
In-vehicle sensor
—
—
GI
MA
EM
LC
EC
FE
AT
TF
PD
AX
SU
BR
ST
RS
BT
SC
EL
IDX
TROUBLE DIAGNOSES
Auto Amp. Terminals and Reference Value (Cont’d)
HA-41
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