2001 INFINITI QX4 ignition

2 JUDGEMENT PROCEDURE STEP 1
1. Turn ignition switch to ªOFFº position.
2. Push shift lock release button.
3. Move selector lever from ªPº to ªDº position.
4. Turn ignition switch to ªONº position. (Do not start engine.)
5. Depress and hold overdrive control switch in ªOFFº position (the O/D OFF indicator lamp will be ªONº) until directed to
release the switch. (If O/D OFF indicator lamp does not come on, go to step 5 on AT-257.)
6. Turn ignition switch to ªOFFº position.
SAT968I
7. Turn ignition switch to ªONº position (Do not start engine.).
8. Release the overdrive control switch (the O/D OFF indicator lamp will be ªOFFº).
9. Wait 2 seconds.
10. Move selector lever to ª2º position.
11. Depress and release the overdrive control switch (the O/D OFF indicator lamp will be ªONº).
12. Depress and hold the overdrive control switch (the O/D OFF indicator lamp will be ªOFFº) until directed to release the
switch.
SAT969I
©GO TO 3.
ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION
Diagnostic Procedure Without CONSULT-II (Cont'd)
AT-48

SAT496G
IBefore road test, familiarize yourself with all test procedures
and items to check.
IConduct tests on all items until specified symptom is found.
Troubleshoot items which check out No Good after road test.
Refer to ªON BOARD DIAGNOSTIC SYSTEM DESCRIP-
TIONº and ªTROUBLE DIAGNOSES FOR SYMPTOMSº,
AT-33 - AT-50 and AT-215 - AT-257.
1. CHECK BEFORE ENGINE IS STARTEDNBAT0024S02
1 CHECK O/D OFF INDICATOR LAMP
1. Park vehicle on flat surface.
2. Move selector lever to ªPº position.
3. Turn ignition switch to ªOFFº position.
Wait at least 5 seconds.
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4. Turn ignition switch to ªONº position. (Do not start engine.)
5. Does O/D OFF indicator lamp come on for about 2 seconds?
SAT133K
YesorNo
Ye s©GO TO 2.
No©Go to ª1. O/D OFF Indicator Lamp Does Not Come Onº, AT-218.
TROUBLE DIAGNOSIS Ð BASIC INSPECTION
Road Test (Cont'd)
AT-64

2 CHECK O/D OFF INDICATOR LAMP
Does O/D OFF indicator lamp flicker for about 8 seconds?
SAT133K
YesorNo
Ye s©Perform self-diagnosis. Refer to TCM SELF-DIAGNOSIS PROCEDURE (No Tools),
AT-46.
No©GO TO 3.
3 CHECK NG ITEM
1. Turn ignition switch to ªOFFº position.
2. Perform self-diagnosis and note NG items.
Refer to TCM SELF-DIAGNOSIS PROCEDURE (No Tools), AT-46.
©Go to ª2. Check at idleº, AT-66.
GI
MA
EM
LC
EC
FE
TF
PD
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
TROUBLE DIAGNOSIS Ð BASIC INSPECTION
Road Test (Cont'd)
AT-65

2. CHECK AT IDLE=NBAT0024S03
1 CHECK ENGINE START
1. Park vehicle on flat surface.
2. Turn ignition switch to ªOFFº position.
3. Move selector lever to ªPº or ªNº position.
4. Turn ignition switch to start position.
5. Is engine started?
YesorNo
Ye s©GO TO 2.
No©Go to ª2. Engine Cannot Be Started In ªPº and ªNº Positionº, AT-221.
2 CHECK ENGINE START
1. Turn ignition switch to ªOFFº position.
2. Move selector lever to ªDº, ª1º, ª2º or ªRº position.
3. Turn ignition switch to start position.
4. Is engine started?
YesorNo
Ye s©Go to ª2. Engine Cannot Be Started In ªPº and ªNº Positionº, AT-221.
No©GO TO 3.
3 CHECK VEHICLE MOVE
1. Turn ignition switch to ªOFFº position.
2. Move selector lever to ªPº position.
3. Release parking brake.
4. Push vehicle forward or backward.
5. Does vehicle move when it is pushed forward or backward?
SAT796A
YesorNo
Ye s©Go to ª3. In ªPº Position, Vehicle Moves Forward Or Backward When Pushedº, AT-222.
No©GO TO 4.
4 CHECK VEHICLE MOVE
1. Apply parking brake.
2. Move selector lever to ªNº position.
3. Turn ignition switch to ªSTARTº position and start engine.
4. Release parking brake.
5. Does vehicle move forward or backward?
YesorNo
Ye s©Go to ª4. In ªNº Position, Vehicle Movesº, AT-223.
No©GO TO 5.
TROUBLE DIAGNOSIS Ð BASIC INSPECTION
Road Test (Cont'd)
AT-66

SAT131K
CONSULT-II Setting ProcedureNBAT0024S04021. Turn ignition switch ªOFFº.
2. Connect CONSULT-II to data link connector, which is located
in instrument lower panel on driver side.
SAT586J
3. Turn ignition switch ªONº.
4. Touch ªSTARTº.
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5. Touch ªA/Tº.
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6. Touch ªDATA MONITORº.
SAT175K
7. Touch ªMAIN SIGNALSº or ªTCM INPUT SIGNALSº.
8. See ªNumerical Displayº, ªBarchart Displayº or ªLine Graph
Displayº.
TROUBLE DIAGNOSIS Ð BASIC INSPECTION
Road Test (Cont'd)
AT-68

Items Symptom Condition Diagnostic Item Reference Page
Slips/Will Not
EngageRaces extremely
fast or slips in
changing from D
4or D3to D1when
depressing pedal.ON vehicle1. Fluid level AT-59
2. Throttle position sensor (Adjustment) EC-174
3. Line pressure test AT-62
4. Line pressure solenoid valve AT-162
5. Control valve assembly AT-273
OFF vehicle6. Forward clutch AT-320
7. Forward one-way clutch AT-330
8. Low one-way clutch AT-328
Vehicle will not
run in any posi-
tion.ON vehicle1. Fluid level AT-59
2. Manual control linkage adjustment AT-276
3. Line pressure test AT-62
4. Line pressure solenoid valve AT-162
OFF vehicle5. Oil pump AT-297
6. High clutch AT-317
7. Brake band AT-333
8. Low & reverse brake AT-324
9. Torque converter AT-286
10. Parking pawl components AT-337
NOT USEDEngine cannot be
started in P and N
positions.
AT-221ON vehicle1. Ignition switch and starter EL-9, and SC-10
2. Manual control linkage adjustment AT-276
3. Park/neutral position (PNP) switch
adjustmentAT-276
Engine starts in
positions other
than P and N.
AT-221ON vehicle1. Manual control linkage adjustment AT-276
2. Park/neutral position (PNP) switch
adjustmentAT-276
Transmission
noise in P and N
positions.ON vehicle1. Fluid level AT-59
2. Line pressure test AT-62
3. Throttle position sensor (Adjustment) EC-174
4. Vehicle speed sensor´A/T (Revolution
sensor) and vehicle speed sensor´MTRAT- 111 , 1 9 7
5. Engine speed signal AT-116
OFF vehicle6. Oil pump AT-297
7. Torque converter AT-286
Vehicle moves
when changing
into P position or
parking gear does
not disengage
when shifted out
of P position.
AT-222ON vehicle 1. Manual control linkage adjustment AT-276
OFF vehicle 2. Parking pawl components AT-337
TROUBLE DIAGNOSIS Ð GENERAL DESCRIPTION
Symptom Chart (Cont'd)
AT-88

AAT475A
TCM Terminals and Reference Value=NBAT0027PREPARATIONNBAT0027S01IMeasure voltage between each terminal and terminal 25 or 48
by following ªTCM INSPECTION TABLEº.
SAT217JB
TCM HARNESS CONNECTOR TERMINAL LAYOUTNBAT0027S02TCM INSPECTION TABLENBAT0027S03(Data are reference values.)
Terminal
No.Wire color Item ConditionJudgement
standard
(Approx.)
1GYLine pressure
solenoid valve
When releasing accelerator pedal after warm-
ing up engine.1.5 - 3.0V
When depressing accelerator pedal fully after
warming up engine.0V
2 BR/YLine pressure
solenoid valve
(with dropping
resistor)When releasing accelerator pedal after warm-
ing up engine.5 - 14V
When depressing accelerator pedal fully after
warming up engine.0V
3 G/ORTorque converter
clutch solenoid
valve
When A/T performs lock-up. 8 - 15V
When A/T does not perform lock- up. 0V
4Ð Ð
ÐÐ
5Ð Ð Ð Ð
6Ð Ð Ð Ð
7Ð Ð Ð Ð
8Ð Ð Ð Ð
9Ð Ð Ð Ð
10 W/R Power sourceWhen turning ignition switch to ªONº.Battery volt-
age
When turning ignition switch to ªOFFº. 0V
TROUBLE DIAGNOSIS Ð GENERAL DESCRIPTION
TCM Terminals and Reference Value
AT-92

Terminal
No.Wire color Item ConditionJudgement
standard
(Approx.)
24 W/GASCD OD cut
signal
When ªACCELº set switch on ASCD cruise is
released.5 - 10V
When ªACCELº set switch on ASCD cruise is
applied.Less than 2V
25 B Ground
Ð0V
26 GPNP switch ª1º
position
When setting selector lever to ª1º position.Battery volt-
age
When setting selector lever to other positions. 0V
27 G/WPNP switch ª2º
positionWhen setting selector lever to ª2º position.Battery volt-
age
When setting selector lever to other positions. 0V
28 R/YPower source
(Memory back-up)
or
When turning ignition switch to ªOFFº.Battery volt-
age
When turning ignition switch to ªONº.Battery volt-
age
29 WRevolution sensor
(Measure in AC
range)
When vehicle cruises at 30 km/h (19 MPH).1V or more
Voltage rises
gradually in
response to
vehicle speed.
When vehicle parks. 0V
30*2 W (RX)
ÐÐ
31*2 L (TX) Ð Ð
32 P/BThrottle position
sensor
(Power source)Ignition switch ªONº. 4.5 - 5.5V
Ignition switch ªOFFº. 0V
33*1 G/R LAN Ð Ð
34 LPNP switch ªDº
position
When setting selector lever to ªDº position.Battery volt-
age
When setting selector lever to other positions. 0V
35 YPNP switch ªRº
positionWhen setting selector lever to ªRº position.Battery volt-
age
When setting selector lever to other positions. 0V
36 PPNP switch ªNº or
ªPº positionWhen setting selector lever to ªNº or ªPº posi-
tion.Battery volt-
age
When setting selector lever to other positions. 0V
37 Ð Ð Ð Ð
38 WTurbine revolution
sensor (Measure
in AC range)
When engine is running at 1,000 rpm1.2V
Voltage rises
gradually in
response to
engine speed.
TROUBLE DIAGNOSIS Ð GENERAL DESCRIPTION
TCM Terminals and Reference Value (Cont'd)
AT-94