2011 INFINITI QX56 Factory Service Manual

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Page 1825 of 5598

INFINITI QX56 2011 Factory Service Manual
DIAGNOSIS SYSTEM (TRANSFER CONTROL UNIT)
DLN-23
< SYSTEM DESCRIPTION > [TRANSFER: ATX90A]
C
EF
G H
I
J
K L
M A
B
DLN
N
O P
WORK SUPPORT
*: “LOCK SLEEVE SENSOR” means transfer lock position sensor

Page 1826 of 5598

INFINITI QX56 2011 Factory Service Manual
DLN-24
< ECU DIAGNOSIS INFORMATION >[TRANSFER: ATX90A]
TRANSFER CONTROL UNIT
ECU DIAGNOSIS INFORMATION
TRANSFER CONTROL UNIT
Reference ValueINFOID:0000000006222227
VALUES ON THE DIAGNOSIS TOOL
Monito

Page 1827 of 5598

INFINITI QX56 2011 Factory Service Manual
TRANSFER CONTROL UNITDLN-25
< ECU DIAGNOSIS INFORMATION > [TRANSFER: ATX90A]
C
EF
G H
I
J
K L
M A
B
DLN
N
O P
HI-LO POSI SEN 3 4WD mode: AUTO or 4H ON
4WD mode: Shifting OFF
4WD mode: 4L OFF
HI-LO PO

TRANSFER CONTROL UNITDLN-25
< ECU DIAGNOSIS INFORMATION > [TRANSFER: ATX90A]
C
EF
G H
I
J
K L
M A
B
DLN
N
O P
HI-LO POSI SEN 3 4WD mode: AUTO or 4H ON
4WD mode: Shifting OFF
4WD mode: 4L OFF
HI-LO POSI SEN 1 4WD mode: AUTO or 4H ON
4WD mode: Shifting ON
4WD mode: 4L OFF
LOCK POSI SEN When lock sleeve is opening OPEN
When lock sleeve locking LOCK
When transfer lock position sensor
signal circuit is short. (Battery
short) BAT
When transfer lock position sensor is unlearned. UNLEAN
When the temperature of transfer lock position sensor is high. HI TMP
When transfer lock position sensor is malfunctioning. ERROR
When transfer lock position sensor signal circuit is short. (Ground
short) GND
AT P I N D ATP lamp: ON ON
AT P l a m p : O F F O F F
4WD FAIL LAMP 4WD warning lamp: ON ON
4WD warning lamp: OFF OFF
4WD MODE IND 4WD shift switch: AUTO AUTO
4WD shift switch: 4H LOCK
4WD shift switch: 4L 4L
MOTOR DRIVE B When transfer motor is driving in reversal. (100% duty controlled) HI
When transfer motor is driving or stopping. LO
When transfer motor is driving in reversal. (PWM output) PWM
MOTOR DRIVE A When transfer motor is driving. (100% duty controlled) HI
When transfer motor is driving in reversal or stopping. LO
When transfer motor is driving. (PWM output) PWM
FLUID TEMP SE The temperature of transfer fluid is 20 – 80 °C. Approx. 1.1 – 0.3 V
MOTOR TEMP The temperature of transfer motor is 20 – 80 °C. Approx. 1.1 – 0.3 V
C/U POWER SUP Always Battery voltage
MOTOR POWER SUP Always Battery voltage
ROTARY POSI SEN 4WD mode: AUTO
A/T shift selector: DDepress the accelerator pedal several
times.
Value is changing
THRTL POS SEN When depressing accelerator pedal
(Value rises gradually in response to throttle position) 0 – 100 %
AT R SPEED Vehicle stopped 0.00 km/h (0.00 mph)
Vehicle driving (4WD mode: AUTO)
CAUTION:
Check air pressure of tire under standard condition. Approx. equal to the indication
on speedometer (inside of ±10
%)
T/M GEAR A/T shift selector: D
Vehicle driving 1
2
3
4
5
6
7
Monitor item Condition Value/Status
Revision: 2010 May2011 QX56

Page 1828 of 5598

INFINITI QX56 2011 Factory Service Manual
DLN-26
< ECU DIAGNOSIS INFORMATION >[TRANSFER: ATX90A]
TRANSFER CONTROL UNIT
*1: 4WD shift swich (2WD) is not equipped, but it is displayed.
*2: This indicator is not equipped, but it is displayed.
*

Page 1829 of 5598

INFINITI QX56 2011 Factory Service Manual
TRANSFER CONTROL UNITDLN-27
< ECU DIAGNOSIS INFORMATION > [TRANSFER: ATX90A]
C
EF
G H
I
J
K L
M A
B
DLN
N
O P
7
(Y) Ground
Transfer fluid tempera-
ture sensor power supply Input Engine running 0 –

Page 1830 of 5598

INFINITI QX56 2011 Factory Service Manual
DLN-28
< ECU DIAGNOSIS INFORMATION >[TRANSFER: ATX90A]
TRANSFER CONTROL UNIT
CAUTION:
When using circuit tester to measure voltage for in
spection, be sure not to extend forcibly any con-
nector term

Page 1831 of 5598

INFINITI QX56 2011 Factory Service Manual
TRANSFER CONTROL UNITDLN-29
< ECU DIAGNOSIS INFORMATION > [TRANSFER: ATX90A]
C
EF
G H
I
J
K L
M A
B
DLN
N
O P
DTC Inspection Priority ChartINFOID:0000000006222229
If some DTCs are displayed at the sa

Page 1832 of 5598

INFINITI QX56 2011 Factory Service Manual
DLN-30
< ECU DIAGNOSIS INFORMATION >[TRANSFER: ATX90A]
TRANSFER CONTROL UNIT
P181C MOTOR POWER SUPPLY
DLN-76, "DTC Logic"
P181E ST ANGLE SEN SIGDLN-77, "DTC Logic"
P181F INCOMP CALIBRATIONDLN-78, "DT

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