Infiniti QX56 (JA60). Manual — part 291
TRANSFER CONTROL UNIT
DLN-87
< ECU DIAGNOSIS >
[ATX14B]
C
E
F
G
H
I
J
K
L
M
A
B
DLN
N
O
P
25
V
Neutral-4LO switch
• Vehicle stopped
• Engine running
• A/T selector lever
“N” position
• Brake pedal de-
pressed
4WD shift switch: 2WD, AUTO or 4H
Battery voltage
4WD shift switch: 4H to 4LO (While actua-
tor motor is operating.)
Battery voltage
→ 0V
4WD shift switch: 4LO to 4H (While actua-
tor motor is operating.)
0V
→ Battery
voltage
4WD shift switch: 4LO
0V
27
W/L
Actuator position switch 2
(High)
• Vehicle stopped
• Engine running
• A/T selector lever
“N” position
• Brake pedal de-
pressed
4WD shift switch: 4H, AUTO or 2WD
0V
4WD shift switch: 4LO
Battery voltage
28
B/G
Sensor ground
Always
0V
29
L/W
Ignition switch monitor
Ignition switch: ON
Battery voltage
Ignition switch: OFF
0V
30
SB
Shut off relay
Ignition switch: ON
0V
Ignition switch: OFF
Battery voltage
31
G
Transfer fluid temperature
sensor
Ignition switch: ON
Transfer fluid temperature approx. 20
°C
(68
°F)
1.1V
Transfer fluid temperature approx. 80
°C
(176
°F)
0.3V
33
R/L
Transfer shift high relay
monitor
• Vehicle stopped
• Engine running
• A/T selector lever
“N” position
• Brake pedal de-
pressed
4WD shift switch: 4H to 4LO (“Wait” func-
tion is operating.)
Battery voltage
Except the above
0V
34
BR
Clutch pressure switch
• Vehicle stopped
• Engine running
• A/T selector lever
“D” position
4WD shift switch: AUTO or 4H (“Wait” func-
tion is not operating.)
0V
• Vehicle stopped
• Engine running
4WD shift switch: 2WD (“Wait” function is
not operating.)
Battery voltage
35
BR/
W
Line pressure switch
• Ignition switch: ON
• A/T selector lever “D” position
• 4WD shift switch: AUTO
0V
• After the vehicle
has been left at
room temperature
for 5 minutes and
more with ignition
switch in “OFF” po-
sition.
• Ignition switch: ON
• A/T selector lever: “P” or “N” position
• 4WD shift switch: other than AUTO
Battery voltage
40
L/Y
ATP switch
• Vehicle stopped
• Engine running
• A/T selector lever
“N”
• Brake pedal de-
pressed
4WD shift switch: 4H to 4LO or 4LO to 4H
(While actuator motor is operating.)
0V
Except the above
Battery voltage
Terminal
Wire
color
Item
Condition
Data (Approx.)
DLN-88
< ECU DIAGNOSIS >
[ATX14B]
TRANSFER CONTROL UNIT
CAUTION:
When using a circuit tester to measure voltage for inspection, be sure not to extend forcibly any connector terminals.
NOTE:
Data are reference value and are measured between each terminal and ground.
41
R
Transfer motor relay moni-
tor
• Accelerator pedal
depressed
• Vehicle stopped
• Engine running
• Brake pedal de-
pressed
4WD shift switch: 2WD
0V
4WD shift switch: AUTO or 4LO (A/T selec-
tor lever “P” or “N” position)
0V
(Battery volt-
age for approx.
2 sec. after
shifting to “P”
and “N”.)
4WD shift switch: AUTO or 4LO (Except for
A/T selector lever “P” or “N” position)
Battery voltage
4WD shift switch: 4H (A/T selector lever
“P” position)
0V
(Battery volt-
age for approx.
2 sec. after
shifting to “P”.)
4WD shift switch: 4H (Except for A/T selec-
tor lever “P” position)
Battery voltage
42
P/G
Transfer shift low relay
monitor
• Vehicle stopped
• Engine running
• A/T selector lever
“N” position
• Brake pedal de-
pressed
4WD shift switch: 4LO to 4H (“Wait” func-
tion is operating.)
Battery voltage
Except the above
0V
43
G/Y
Wait detection switch
• Vehicle stopped
• Engine running
• A/T selector lever
“N” position
• Brake pedal de-
pressed
4WD shift switch: 2WD, AUTO or 4H
Battery voltage
4WD shift switch: 4H to 4LO (While actua-
tor motor is operating.)
Battery voltage
→ 0V
4WD shift switch: 4LO to 4H (While actua-
tor motor is operating.)
0V
→ Battery
voltage
4WD shift switch: 4LO
0V
44
LG/B
Actuator position switch 1
(Low)
• Vehicle stopped
• Engine running
• A/T selector lever
“N” position
• Brake pedal de-
pressed
4WD shift switch: 4LO
0V
4WD shift switch: 2WD, AUTO or 4H
Battery voltage
45
B
Ground
Always
0V
47
W
Power supply
(Memory back-up)
Ignition switch: ON
Battery voltage
Ignition switch: OFF
Battery voltage
Terminal
Wire
color
Item
Condition
Data (Approx.)
TRANSFER CONTROL UNIT
DLN-89
< ECU DIAGNOSIS >
[ATX14B]
C
E
F
G
H
I
J
K
L
M
A
B
DLN
N
O
P
Wiring Diagram - ALL-MODE 4WD SYSTEM -
INFOID:0000000005148854
ABDWA0015GB
DLN-90
< ECU DIAGNOSIS >
[ATX14B]
TRANSFER CONTROL UNIT
ABDWA0114GB
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