2001 INFINITI QX4 4WD

Listen to Customer ComplaintsNBTF0015IEach customer feels differently about a problem. It is important
to fully understand the symptoms or conditions for a customer
complaint.
IListen to the customer about how and when the malfunction
occurs, and make good use of it when performing the road test.
Transfer Fluid CheckNBTF0016ICheck fluid for leaks and fluid level. Refer to MA-22, ªCheck-
ing All-mode 4WD Transfer Fluidº.
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Road TestNBTF0017PREPARATION FOR ROAD TESTNBTF0017S01IThe purpose of the test is to determine overall performance of
transfer and analyze causes of problems.
IThe road test consists of the following three parts:
IWhen a malfunction is found in any part of transfer, perform the
road test to locate the malfunction area and repair the malfunc-
tion parts.
1. Check before engine is started
2. Check at idle
3. Cruise test
IPerform road test and place checks for NG items on the diag-
nostic worksheet. Refer to TF-42.
TROUBLE DIAGNOSIS Ð BASIC INSPECTION
Listen to Customer Complaints
TF-44

1. CHECK BEFORE ENGINE IS STARTED=NBTF0017S02
1 CHECK 4WD SHIFT INDICATOR LAMP
1. Park vehicle on flat surface.
2. Turn ignition switch to ªOFFº position.
3. Move A/T selector lever to ªPº position.
4. Set 4WD shift switch to ª4Hº position.
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5. Set 4WD shift switch to ª2WDº position.
6. Turn ignition switch to ªONº position. (Do not start engine.)
7. Does 4WD shift indicator lamp turn ON for approx. 1 second?
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YesorNo
Ye s©GO TO 2.
No©Go to Symptom 1. Refer to TF-98.
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MA
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LC
EC
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TROUBLE DIAGNOSIS Ð BASIC INSPECTION
Road Test (Cont'd)
TF-45

2 CHECK 4WD WARNING LAMP
Is 4WD warning lamp turned ON?
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YesorNo
Ye s©1. Turn ignition switch to ªOFFº position.
2. Perform self-diagnosis.
Refer to ªTrouble Diagnosis without CONSULT-IIº, TF-27.
3. Go to ª2. CHECK AT IDLEº. Refer to TF-47.
No©Go to Symptom 2. Refer to TF-100.
TROUBLE DIAGNOSIS Ð BASIC INSPECTION
Road Test (Cont'd)
TF-46

2. CHECK AT IDLE=NBTF0017S03
1 CHECK 4WD SHIFT INDICATOR LAMP
1. Park vehicle on flat surface.
2. Turn ignition switch to ªOFFº position.
3. Move A/T selector lever to ªPº or ªNº position.
4. Set 4WD shift switch to ª4Hº position.
5. Set 4WD shift switch to ª2WDº position.
6. Start engine.
7. Is 4WD shift indicator lamp turned OFF?
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YesorNo
Ye s©Go to ªATP SWITCH, WAIT DETECTION SWITCH AND NEUTRAL-4LO SWITCHº. Refer
to TF-76.
No©GO TO 2.
2 CHECK 4WD WARNING LAMP
Is 4WD warning lamp turned OFF?
YesorNo
Ye s©GO TO 3.
No©Perform self-diagnosis. Refer to ªTrouble Diagnosis without CONSULT-IIº, TF-27.
GI
MA
EM
LC
EC
FE
AT
PD
AX
SU
BR
ST
RS
BT
HA
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IDX
TROUBLE DIAGNOSIS Ð BASIC INSPECTION
Road Test (Cont'd)
TF-47

3 CHECK 4WD SHIFT INDICATOR LAMP
1. Set 4WD shift switch to ª2WDº, ªAUTOº, ª4Hº, ª4LOº, ª4Hº and ª2WDº in order.
(Stay at each switch position for at least 1 second.)
2. Does 4WD shift indicator lamp change properly and does buzzer sound?
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YesorNo
Ye s©GO TO 4.
No©Go to ª2-4WD SHIFT SOLENOID VALVE AND 4WD SHIFT SWITCHº. Refer to TF-66.
4 CHECK 4WD WARNING LAMP
Is 4WD warning lamp turned ON?
YesorNo
Ye s©Perform self-diagnosis. (Refer to ªTrouble Diagnosis without CONSULT-IIº, TF-27.)
No©GO TO 5.
TROUBLE DIAGNOSIS Ð BASIC INSPECTION
Road Test (Cont'd)
TF-48

5 CHECK 4WD SHIFT INDICATOR LAMP
1. Move A/T selector lever to ªPº position.
2. Set 4WD shift switch from ª4Hº to ª4LOº.
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3. While shifting from ª4Hº to ª4LOº, does 4WD shift indicator lamp turn OFF and ATP warning lamp turn ON?
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YesorNo
Ye s©GO TO 6.
No©Go to Symptoms 3 and 4. Refer to TF-102.
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MA
EM
LC
EC
FE
AT
PD
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
TROUBLE DIAGNOSIS Ð BASIC INSPECTION
Road Test (Cont'd)
TF-49

6 CHECK 4WD SHIFT INDICATOR LAMP
Does 4WD shift indicator lamp indicate 4LO indicator lamp turn ON when 4WD shift switch is set in ª4LOº?
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YesorNo
Ye s©GO TO 7.
No©Go to Symptom 5. Refer to TF-104.
7 CHECK 4WD SHIFT INDICATOR LAMP (*1)
1. Set 4WD shift switch from ª4LOº to ª4Hº.
2. Does 4LO indicator lamp flicker? (*1)
*1: While ªWaitº function is operating, 4LO indicator lamp flashes.
YesorNo
Ye s©Go to Symptom 6 and 7. Refer to TF-106 and TF-107.
No©Go to ª3. CRUISE TESTº. Refer to TF-51.
TROUBLE DIAGNOSIS Ð BASIC INSPECTION
Road Test (Cont'd)
TF-50

2 CHECK INPUT SIGNAL
With CONSULT-II
1. Warm up engine to normal operating temperature.
2. Park vehicle on flat surface.
3. Move A/T selector lever to ªPº position.
4. Set 4WD shift switch to ª4Hº position.
5. Set 4WD shift switch to ªAUTOº position.
6. Start engine.
7. Drive for at least 30 seconds at a speed higher than 20 km/h (12 MPH).
(Drive vehicle until ªFLUID TEMP SEº exceeds 0.9V.)
8. Park vehicle on flat surface.
9. Move A/T selector lever to ªPº position.
10. Set 4WD shift switch to ª2WDº position.
11. Leave vehicle for at least 80 seconds with ªFLUID TEMP SEº at 0.9V or less.
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12. Is 4WD warning lamp turned ON?
YesorNo
Ye s©Perform self-diagnosis. Refer to ªTrouble Diagnosis with CONSULT-IIº, TF-30.
No©GO TO 4.
3 CHECK INPUT SIGNAL
Without CONSULT-II
1. Warm up engine to normal operating temperature.
2. Park vehicle on flat surface.
3. Move A/T selector lever to ªPº position.
4. Set 4WD shift switch to ª4Hº position.
5. Set 4WD shift switch to ªAUTOº position.
6. Start engine.
7. Drive vehicle for at least 30 seconds at a speed higher than 20 km/h (12 MPH).
8. Park vehicle on flat surface.
9. Move A/T selector lever to ªPº position.
10. Set 4WD shift switch to ª2WDº position.
11. Is 4WD warning lamp turned ON?
YesorNo
Ye s©Perform self-diagnosis. Refer to ªTrouble Diagnosis without CONSULT-IIº, TF-27.
No©GO TO 4.
4 (1) CHECK TIGHT CORNER BRAKING SYMPTOM
1. Set 4WD shift switch to ªAUTOº position.
2. Drive vehicle at speed lower than 20 km/h (12 MPH) with steering wheel fully turned.
3. Does tight corner braking symptom occur?
YesorNo
Ye s©GO TO 5.
No©GO TO 6.
TROUBLE DIAGNOSIS Ð BASIC INSPECTION
Road Test (Cont'd)
TF-52