INFINITI QX4 2001 Factory Service Manual

2-4WD SHIFT SOLENOID VALVENBTF0067S03The 2-4WD shift solenoid valve operates to apply oil pressure to the wet, multiplate clutch, depending on the
drive mode. The driving force is transmitted to the front wheels through the clutch so the vehicle is set in the
4WD mode. Setting the vehicle in the 2WD mode requires no pressure buildup. In other words, pressure force
applied to the wet, multiplate clutch becomes zero.
LINE PRESSURE SWITCHNBTF0067S041. With the transfer system design, control of the oil pressure provides the transmission of drive torque to
the front wheels. The main pressure to control the oil pressure is referred to as the line pressure.
The line pressure switch determines whether or not adequate line pressure has built up under different
operating conditions.
2. The line pressure switch turns ON when line pressure is produced.
3. The line pressure switch senses line pressure abnormalities and turns the 4WD warning lamp ON.
ALL-MODE 4WD SYSTEM
Description of Electrical Parts (Cont'd)
TF-16

Circuit Diagram for Quick Pinpoint CheckNBTF0009
MTF060A
GI
MA
EM
LC
EC
FE
AT
PD
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
ALL-MODE 4WD SYSTEM
Circuit Diagram for Quick Pinpoint Check
TF-17

Wiring Diagram Ð TF ÐNBTF0010
MTF061A
ALL-MODE 4WD SYSTEM
Wiring Diagram Ð TF Ð
TF-18

MTF062A
GI
MA
EM
LC
EC
FE
AT
PD
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
ALL-MODE 4WD SYSTEM
Wiring Diagram Ð TF Ð (Cont'd)
TF-19

MTF063A
ALL-MODE 4WD SYSTEM
Wiring Diagram Ð TF Ð (Cont'd)
TF-20

MTF064A
GI
MA
EM
LC
EC
FE
AT
PD
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
ALL-MODE 4WD SYSTEM
Wiring Diagram Ð TF Ð (Cont'd)
TF-21

MTF065A
ALL-MODE 4WD SYSTEM
Wiring Diagram Ð TF Ð (Cont'd)
TF-22

MTF066A
GI
MA
EM
LC
EC
FE
AT
PD
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
ALL-MODE 4WD SYSTEM
Wiring Diagram Ð TF Ð (Cont'd)
TF-23

MTF067A
ALL-MODE 4WD SYSTEM
Wiring Diagram Ð TF Ð (Cont'd)
TF-24

MTF076A
GI
MA
EM
LC
EC
FE
AT
PD
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
ALL-MODE 4WD SYSTEM
Wiring Diagram Ð TF Ð (Cont'd)
TF-25