Infiniti QX56 (JA60). Manual — part 290
TRANSFER CONTROL UNIT
DLN-83
< ECU DIAGNOSIS >
[ATX14B]
C
E
F
G
H
I
J
K
L
M
A
B
DLN
N
O
P
VHCL/S COMP [km/h] or
[mph]
Vehicle speed
Vehicle stopped
0 km/h (0 mph)
Vehicle running
CAUTION:
Check air pressure of tire under standard condition.
Approximately
equal to the indica-
tion on speedome-
ter (Inside of
±10%)
COMP CL TORQ [kgm]
Condition of control
torque
• Vehicle stopped
• Engine running
• A/T selector lever N posi-
tion
• Brake pedal depressed
4WD shift switch: 2WD
0 kg-m
4WD shift switch: AUTO
39 - 1,353 N·m
(4 - 138 kg-m, 29 -
998 ft-lb)
4WD shift switch: 4H or
4LO
1,353 N·m
(138 kg-m, 998 ft-
lb)
DUTY SOLENOID [%]
Condition of clutch pres-
sure solenoid
• Vehicle stopped
• Engine running
• A/T selector lever N posi-
tion
• Brake pedal depressed
4WD shift switch: 2WD
4%
4WD shift switch: AUTO
96 - 4%
4WD shift switch: 4H or
4LO
4%
2-4WD SOL [ON/OFF]
Condition of 2-4WD shift
solenoid valve
• Vehicle stopped
• Engine running
• A/T selector lever N posi-
tion
• Brake pedal depressed
4WD shift switch: 2WD
OFF
4WD shift switch: AUTO
ON
4WD shift switch: 4H
4WD shift switch: 4LO
4WD shift switch: AUTO
(Wait function is operat-
ing.)
OFF
4WD shift switch: 4H
(Wait function is operat-
ing.)
OFF
2-4WD SOL MON [ON/
OFF]
Check signal for transfer
control unit signal output
• Vehicle stopped
• Engine running
• A/T selector lever N posi-
tion
• Brake pedal depressed
4WD shift switch: 2WD
OFF
4WD shift switch: AUTO
ON
4WD shift switch: 4H
4WD shift switch: 4LO
4WD shift switch: AUTO
(Wait function is operat-
ing.)
OFF
4WD shift switch: 4H
(Wait function is operat-
ing.)
OFF
MOTOR RELAY [ON/
OFF]
Condition of transfer mo-
tor relay
• Accelerator pedal de-
pressed
• Vehicle stopped
• Engine running
• Brake pedal depressed
4WD shift switch: 2WD
OFF
4WD shift switch: AUTO
or 4LO (A/T selector lever
P or N position)
OFF
(ON for approx. 2
sec. after shifting
to P and N.)
4WD shift switch: AUTO
or 4LO (Except for A/T se-
lector lever P or N posi-
tion)
ON
4WD shift switch: 4H (A/T
selector lever P position)
OFF
(ON for approx. 2
sec. after shifting
to P.)
4WD shift switch: 4H (Ex-
cept for A/T selector lever
P position)
ON
Monitored item [Unit]
Content
Condition
Display value
DLN-84
< ECU DIAGNOSIS >
[ATX14B]
TRANSFER CONTROL UNIT
MOTOR RLY MON [ON/
OFF]
Check signal for transfer
control unit signal output
• Accelerator pedal de-
pressed
• Vehicle stopped
• Engine running
• Brake pedal depressed
4WD shift switch: 2WD
OFF
4WD shift switch: AUTO
or 4LO (A/T selector lever
P or N position)
OFF
(ON for approx. 2
sec. after shifting
to P and N.)
4WD shift switch: AUTO
or 4LO (Except for A/T se-
lector lever P or N posi-
tion)
ON
4WD shift switch: 4H (A/T
selector lever P position)
OFF
(ON for approx. 2
sec. after shifting
to P.)
4WD shift switch: 4H (Ex-
cept for A/T selector lever
P position)
ON
4WD FAIL LAMP [ON/
OFF]
Condition of 4WD warn-
ing lamp
4WD warning lamp: ON
ON
4WD warning lamp: OFF
OFF
2WD IND [ON/OFF]
Condition of 4WD shift in-
dicator lamp (2WD indi-
cator lamp)
2WD indicator lamp of 4WD shift indicator lamp: OFF
OFF
2WD indicator lamp of 4WD shift indicator lamp: ON
ON
AUTO IND [ON/OFF]
Condition of 4WD shift in-
dicator lamp (AUTO indi-
cator lamp)
AUTO indicator lamp of 4WD shift indicator lamp: OFF
OFF
AUTO indicator lamp of 4WD shift indicator lamp: ON
ON
LOCK IND [ON/OFF]
Condition of 4WD shift in-
dicator lamp (Lock indi-
cator lamp)
Lock indicator lamp of 4WD shift indicator lamp: OFF
OFF
Lock indicator lamp of 4WD shift indicator lamp: ON
ON
4L IND [ON/OFF]
Condition of 4LO indica-
tor lamp condition
4LO indicator lamp: OFF
OFF
4LO indicator lamp: ON
ON
ATP IND [ON/OFF]
Condition of ATP indica-
tor lamp
ATP indicator lamp: ON
ON
ATP indicator lamp: OFF
OFF
SHIFT POS SW1 [ON/
OFF]
Condition of actuator po-
sition switch 1
(Low)
• Vehicle stopped
• Engine running
• A/T selector lever N posi-
tion
• Brake pedal depressed
4WD shift switch: 4LO
ON
4WD shift switch: 2WD,
AUTO or 4H
OFF
SHIFT POS SW2 [ON/
OFF]
Condition of actuator po-
sition switch 2
(High)
• Vehicle stopped
• Engine running
• A/T selector lever N posi-
tion
• Brake pedal depressed
4WD shift switch: 4H,
AUTO or 2WD
ON
4WD shift switch: 4LO
OFF
SHIFT ACT 1 [ON/OFF]
Output condition to actu-
ator motor (High)
• Vehicle stopped
• Engine running
• A/T selector lever N posi-
tion
• Brake pedal depressed
4WD shift switch: 4H to
4LO (Wait function is op-
erating.)
ON
Except the above
OFF
SHIFT AC MON1 [ON/
OFF]
Check signal for transfer
control unit signal output
• Vehicle stopped
• Engine running
• A/T selector lever N posi-
tion
• Brake pedal depressed
4WD shift switch: 4H to
4LO (Wait function is op-
erating.)
ON
Except the above
OFF
SHIFT ACT 2 [ON/OFF]
Output condition to actu-
ator motor (Low)
• Vehicle stopped
• Engine running
• A/T selector lever N posi-
tion
• Brake pedal depressed
4WD shift switch: 4LO to
4H (Wait function is oper-
ating.)
ON
Except the above
OFF
Monitored item [Unit]
Content
Condition
Display value
TRANSFER CONTROL UNIT
DLN-85
< ECU DIAGNOSIS >
[ATX14B]
C
E
F
G
H
I
J
K
L
M
A
B
DLN
N
O
P
PHYSICAL VALUES
Terminal Layout
SHIFT AC MON2 [ON/
OFF]
Check signal for transfer
control unit signal output
• Vehicle stopped
• Engine running
• A/T selector lever N posi-
tion
• Brake pedal depressed
4WD shift switch: 4LO to
4H (Wait function is oper-
ating.)
ON
Except the above
OFF
T/F F SPEED [km/h] or
[mph]
Displayed, but do not use.
AT R SPEED [km/h] or
[mph]
Condition of vehicle
speed sensor A/T (output
speed sensor)
During driving
Approximately
matches the out-
put shaft speed.
AT GEAR POSI [1/2/3/4/
5]
Condition of A/T selector
lever position
Displays actual A/T gear position.
1
2
3
4
5
Monitored item [Unit]
Content
Condition
Display value
WDIA0378E
Terminal
Wire
color
Item
Condition
Data (Approx.)
1
GR
2-4WD shift solenoid valve
• Vehicle stopped
• Engine running
• A/T selector lever
“N” position
• Brake pedal de-
pressed
4WD shift switch: 2WD
0V
4WD shift switch: AUTO, 4H or 4LO
Battery voltage
2
B/W
4WD shift indicator lamp
(2WD indicator lamp)
2WD indicator lamp: OFF
Battery voltage
2WD indicator lamp: ON
0V
3
B
Ground
Always
0V
4
Y/L
Transfer shift high relay
• 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
5
W/B
4WD warning lamp
4WD warning lamp: ON
0V
4WD warning lamp: OFF
Battery voltage
6
B
Ground
Always
0V
7
L
CAN-H
—
—
8
P
CAN-L
—
—
9
G/W
4WD shift switch
(2WD)
Ignition switch: ON
4WD shift switch: 2WD
Battery voltage
4WD shift switch: AUTO, 4H or 4LO
0V
DLN-86
< ECU DIAGNOSIS >
[ATX14B]
TRANSFER CONTROL UNIT
10
L/W
Transfer dropping resistor
• Vehicle stopped
• Engine running
• A/T selector lever
“N” position
• Brake pedal de-
pressed
4WD shift switch: AUTO
4 - 14V
4WD shift switch: 2WD, 4H or 4LO
Less than 1V
11
L
4WD shift indicator lamp
(Lock indicator lamp)
Lock indicator lamp of 4WD shift indicator lamp: OFF
Battery voltage
Lock indicator lamp of 4WD shift indicator lamp: ON
0V
12
W/G
4LO indicator lamp
4LO indicator lamp: OFF
Battery voltage
4LO indicator lamp: ON
0V
13
G/B
Transfer shift low relay
• 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
14
LG
Transfer motor relay
• Accelerator pedal
depressed
• Vehicle stopped
• Engine running
• Brake pedal de-
pressed
4WD shift switch: 2WD
Battery voltage
4WD shift switch: AUTO or 4LO (A/T selec-
tor lever “P” or “N” position)
Battery voltage
(0V 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)
0V
4WD shift switch: 4H (A/T selector lever
“P” position)
Battery voltage
(0V for approx.
2 sec. after
shifting to “P”.)
4WD shift switch: 4H (Except for A/T selec-
tor lever “P” position)
0V
15
L/B
ATP warning lamp
ATP indicator lamp: ON
0V
ATP indicator lamp: OFF
Battery voltage
16
Y/R
Power supply
Ignition switch: ON
Battery voltage
Ignition switch: OFF
0V
18
O
4WD shift switch
(4H)
Ignition switch: ON
4WD shift switch: 4H
Battery voltage
4WD shift switch: 2WD, AUTO or 4LO
0V
19
L
Clutch pressure solenoid
valve
• Vehicle stopped
• Engine running
• A/T selector lever
“N” position
• Brake pedal de-
pressed
4WD shift switch: AUTO
1.5 - 3V
4WD shift switch: 2WD, 4H or 4LO
Less than 1V
21
BR
4WD shift indicator lamp
(AUTO indicator lamp)
• AUTO indicator lamp of 4WD shift indicator lamp: OFF
Battery voltage
AUTO indicator lamp of 4WD shift indicator lamp: ON
0V
22
Y/R
Power supply
Ignition switch: ON
Battery voltage
Ignition switch: OFF
0V
23
R
4WD shift switch
(4LO)
Ignition switch: ON
4WD shift switch: 4LO
Battery voltage
4WD shift switch: 2WD, AUTO or 4H
0V
24
LG/R
4WD shift switch
(AUTO)
Ignition switch: ON
4WD shift switch: AUTO
Battery voltage
4WD shift switch: 2WD, 4H or 4LO
0V
Terminal
Wire
color
Item
Condition
Data (Approx.)
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