2001 INFINITI QX4 Factory Service Manual

Page 2345 of 2395

INFINITI QX4 2001  Factory Service Manual 3 CHECK PROCEDURES FROM THE BEGINNING
Check again.
OK or NG
OK©INSPECTION END
NG©Recheck each connectors pin terminals for damage or loose connection.
TROUBLE DIAGNOSES FOR SYMPTOMS
Symptom 9. 4WD

Page 2346 of 2395

INFINITI QX4 2001  Factory Service Manual NBTF0038
SMT858D
4WD Shift SwitchNBTF0038S01Check continuity between each terminal.
Terminals Switch position Continuity
1-22WD Yes
Except 2WD No
1-3,1-4AUTO Yes
Except AUTO No
1-4,1-54H Yes
Except 4H

Page 2347 of 2395

INFINITI QX4 2001  Factory Service Manual Component
partsTerminals Remarks
4WD solenoid
valve6
Ground
terminalApprox. 20ÉC (68ÉF): Approx. 3.0 - 3.4W
Clutch pres-
sure switch7In room temperature
I2-4WD shift solenoid valve ªOFFº: No
conti

Page 2348 of 2395

INFINITI QX4 2001  Factory Service Manual Switch Terminals4WD shift switch position
4H (N) 4LO
ATP switch 8 - 9No conti-
nuityContinuityNo conti-
nuity
Neutral-4LO
switch12 - 13 No continuity Continuity
Wait detection
switch10-11No continuity

Page 2349 of 2395

INFINITI QX4 2001  Factory Service Manual SMT087D
TRANSFER SWITCH ASSEMBLY SUB-HARNESS
CONNECTOR
NBTF0038S0902Check continuity between terminals shown in the figure.
SMT088D
TRANSFER TERMINAL CORD ASSEMBLY
SUB-HARNESS CONNECTOR
NBTF0038S0903C

Page 2350 of 2395

INFINITI QX4 2001  Factory Service Manual SMT812D
Actuator & Actuator Position SwitchNBTF0038S11ACTUATORNBTF0038S1101Operation & resistance check
IApply battery voltage directly to actuator assembly.
Operating check Battery positive terminal

Page 2351 of 2395

INFINITI QX4 2001  Factory Service Manual SMT844DB
Replacing Oil SealNBTF0068FRONT CASE OIL SEALNBTF0068S011. Drain transfer fluid.
2. Remove exhaust front tube and heat insulator. Refer to
ªRemovalº, TF-119.
3. Remove front propeller shaft

Page 2352 of 2395

INFINITI QX4 2001  Factory Service Manual SMT808D
SHIFT SHAFT OIL SEALNBTF0068S021. Remove front propeller shaft. Refer to PD-6, ªRemoval and
Installationº.
2. Remove companion flange. Refer to ªFRONT CASE OIL
SEALº, TF-116.
3. Remove act