Infiniti QX56 (Z62). Manual — part 457
DLN-28
< ECU DIAGNOSIS INFORMATION >
[TRANSFER: ATX90A]
TRANSFER CONTROL UNIT
CAUTION:
When using circuit tester to measure voltage for inspection, be sure not to extend forcibly any con-
nector terminals.
Fail-Safe
INFOID:0000000006222228
• If any malfunction occurs in 4WD electrical system, and control unit detects the malfunction, 4WD warning
lamp on combination meter turns ON to indicate system malfunction.
• When 4WD warning lamp is ON, vehicle changes to rear-wheel drive or shifts to 4-wheel drive (front-wheels
still have some driving torque).
29
(LG/R)
Ground
Hi-Lo position sensor 2
Input/
Output
Engine
running
(Never
drive the
vehicle.)
Always
0 V
30
(R/B)
Ground
Transfer lock position
sensor (GND)
—
Always
0 V
31
(L/O)
Ground
Transfer internal speed
sensor (DIR)
Input
IGN ON
When changing the trans-
fer motor rotation direc-
tion.
32
(BR/R)
Ground
IGN SW
Input
IGN ON
Battery voltage
IGN OFF
0V
35
(R)
Ground
4WD shift SW (4H)
Input
IGN ON
4WD shift switch: 4H
Battery voltage
4WD shift switch: Except
4H
0 V
36
(L/R)
Ground
Transfer fluid tempera-
ture sensor (GND)
—
Always
0 V
38
(G/O)
Ground
Transfer lock position
sensor signal
Input
IGN ON
39
(R/W)
Ground
Transfer internal speed
sensor power supply
Input
IGN ON
8 V
IGN OFF
0V
41
(W/R)
Ground
Transfer control actuator
power supply
Input
Always
Battery voltage
43
(G/R)
Ground
Motor drive B
Input/
Output
Transfer motor driving
0V - Battery voltage
44
(B)
Ground
GND
—
Always
0 V
45
(G/Y)
Ground
Motor drive A
Input/
Output
Transfer motor driving
0V - Battery voltage
46
(B)
Ground
Transfer control actuator
(GND)
—
Always
0 V
Terminal No.
(Wire color)
Description
Condition
Value (Approx.)
+
-
Signal name
Input/
Output
JPDIE0269GB
JPDIE0268GB
TRANSFER CONTROL UNIT
DLN-29
< ECU DIAGNOSIS INFORMATION >
[TRANSFER: ATX90A]
C
E
F
G
H
I
J
K
L
M
A
B
DLN
N
O
P
DTC Inspection Priority Chart
INFOID:0000000006222229
If some DTCs are displayed at the same time, perform inspections one by one based on the following priority
chart.
DTC Index
INFOID:0000000006222230
Priority
Detected items (DTC)
1
• U1000 CAN COMM CIRCUIT
• U1010 CONTROL UNIT (CAN)
2
• P1802 CONTROL UNIT 1
• P1803 CONTROL UNIT 2
• P1804 CONTROL UNIT 3
• P1809 CONTROL UNIT 4
• P180C SEN POWER SUPPLY (5V)
• P180E SEN POWER SUPPLY (8V)
• P1811 BATTERY VOLTAGE
• P181B INCOMP SELFSHUT
• P181C MOTOR POWER SUPPLY
• P181F INCOMP CALIBRATION
3
• P1807 VECL SPEED SEN-AT
• P1808 VECL SPEED SEN-ABS
• P1816 PNP SW/CIRC
• P181E ST ANGLE SEN SIG
• P1820 ENGINE SPEED SIG
• P1829 THROTTLE POSI SEN
• P1830 ABS OP SIG
• P1831 VDC OP SIG
• P1832 TCS OP SIG
4
• P180D ROTARY POSITION SEN
• P1813 4WD MODE SW
• P181A MOTOR TEMP SEN
• P1826 OIL TEMP SEN
• P182A HI-LO POSITION SEN
• P182B LOCK POSITION SEN
5
• P180F MOTOR SYSTEM
• P1817 SHIFT ACTUATOR
DTC
Display Items
Reference
P1802
CONTROL UNIT 1
P1803
CONTROL UNIT 2
P1804
CONTROL UNIT 3
P1807
VHCL SPEED SEN-AT
P1808
VHCL SPEED SEN-ABS
P1809
CONTROL UNIT 4
P180C
SEN POWER SUPPLY (5V)
P180D
ROTARY POSITION SEN
P180E
SEN POWER SUPPLY (8V)
P180F
MOTOR SYSTEM
P1811
BATTERY VOLTAGE
P1813
4WD MODE SW
P1816
PNP SW/CIRC
P1817
SHIFT ACTUATOR
P181A
MOTOR TEMP SEN
P181B
IMCOMP SELFSHUT
DLN-30
< ECU DIAGNOSIS INFORMATION >
[TRANSFER: ATX90A]
TRANSFER CONTROL UNIT
P181C
MOTOR POWER SUPPLY
P181E
ST ANGLE SEN SIG
P181F
INCOMP CALIBRATION
P1826
OIL TEMP SEN
P1820
ENGINE SPEED SIG
P1829
THROTTLE POSI SEN
P182A
HI-LO POSITION SEN
P182B
LOCK POSITION SEN
P1830
ABS OP SIG
P1831
VDC OP SIG
P1832
TCS OP SIG
U1000
CAN COMM CIRCUIT
U1010
CONTROL UNIT (CAN)
DTC
Display Items
Reference
4WD SYSTEM
DLN-31
< WIRING DIAGRAM >
[TRANSFER: ATX90A]
C
E
F
G
H
I
J
K
L
M
A
B
DLN
N
O
P
WIRING DIAGRAM
4WD SYSTEM
Wiring Diagram
INFOID:0000000006222231
JCDWM1069GB
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