Infiniti QX4 (R50). Manual — part 562
Cross-sectional View
NBTF0006
SMT953CA
ALL-MODE 4WD SYSTEM
Cross-sectional View
TF-10
Control System
NBTF0007
SMT961D
GI
MA
EM
LC
EC
FE
AT
PD
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
ALL-MODE 4WD SYSTEM
Control System
TF-11
ALL-MODE 4WD TRANSFER BASIC CONTROL
NBTF0007S01
SMT043D
HYDRAULIC CONTROL CIRCUITS
NBTF0007S02
SMT040D
OUTLINE
NBTF0007S03
All-mode 4WD transfer is controlled by the transfer control unit and
sensors.
If a malfunction occurs in the all-mode 4WD system, the 4WD
warning lamp lights up to indicate the system malfunction. There
are two ways to identify the cause of the malfunction.
1)
Performing the self-diagnosis. (The 4WD warning lamp will
indicate what kind of malfunction has occurred by flickering.)
2)
Performing diagnosis using CONSULT-II.
ALL-MODE 4WD SYSTEM
Control System (Cont’d)
TF-12
CONTROL SYSTEM DIAGRAM
NBTF0007S04
SMT763D
INDICATIONS OF 4WD WARNING LAMP
NBTF0007S05
Condition
Content
4WD warning lamp
During self-diagnosis
Indicates the malfunction position by number of flickers.
Flickers at malfunction mode.
Lamp check*
Checks the lamp by turning ON during engine starting. After
engine starts, it turns OFF if there are no malfunctions.
ON
Malfunction in 4WD system*
Turns ON to indicate malfunction. When ignition switch is
turned to “OFF” or the malfunction is corrected, it turns OFF.
ON
When vehicle is driven with different
diameters of front and rear tires
Flickers once every 2 seconds.
Turns OFF when ignition switch is “OFF”.
Flickers once every 2 sec-
onds.
High fluid temperature in transfer
unit
When fluid temperature is high or fluid temperature sensor
circuit is shorted, it flickers twice every second.
It turns OFF when fluid temperature becomes normal.
Flickers twice a second.
Other than above (System is nor-
mal.)
Lamp is OFF.
OFF
*: When 4WD warning lamp is ON, all the 4WD shift indicator lamps turn OFF.
GI
MA
EM
LC
EC
FE
AT
PD
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
ALL-MODE 4WD SYSTEM
Control System (Cont’d)
TF-13
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