2001 INFINITI QX4 clutch

Items Symptom Condition Diagnostic Item Reference Page
Improper Shift
TimingKickdown oper-
ates or engine
overruns when
depressing pedal
in D
4beyond kick-
down vehicle
speed limit.ON vehicle1. Vehicle speed sensor´A/T (Revolution
sensor) and vehicle speed sensor´MTRAT- 111 , 1 9 7
2. Throttle position sensor (Adjustment) EC-174
3. Shift solenoid valve A AT-168
4. Shift solenoid valve B AT-172
Gear change from
2
2to 23in 2 posi-
tion.ON vehicle1. Park/neutral position (PNP) switch
adjustmentAT-276
Gear change from
1
1to 12in 1 posi-
tion.ON vehicle1. Park/neutral position (PNP) switch
adjustmentAT-276
2. Manual control linkage adjustment AT-276
No Down ShiftFailure to change
gear from D
4to
D
3.ON vehicle1. Fluid level AT-59
2. Throttle position sensor (Adjustment) EC-174
3. Overrun clutch solenoid valve AT-185
4. Shift solenoid valve A AT-168
5. Line pressure solenoid valve AT-162
6. Control valve assembly AT-273
OFF vehicle7. Low & reverse brake AT-324
8. Overrun clutch AT-320
Failure to change
gear from D
3to
D
2or from D4to
D
2.ON vehicle1. Fluid level AT-59
2. Throttle position sensor (Adjustment) EC-174
3. Shift solenoid valve A AT-168
4. Shift solenoid valve B AT-172
5. Control valve assembly AT-273
OFF vehicle6. High clutch AT-317
7. Brake band AT-333
Failure to change
gear from D
2to
D
1or from D3to
D
1.ON vehicle1. Fluid level AT-59
2. Throttle position sensor (Adjustment) EC-174
3. Shift solenoid valve A AT-168
4. Shift solenoid valve B AT-172
5. Control valve assembly AT-273
OFF vehicle6. Low one-way clutch AT-328
7. High clutch AT-317
8. Brake band AT-333
GI
MA
EM
LC
EC
FE
TF
PD
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
TROUBLE DIAGNOSIS Ð GENERAL DESCRIPTION
Symptom Chart (Cont'd)
AT-83

Items Symptom Condition Diagnostic Item Reference Page
No Down ShiftFailure to change
from D
3to 22when changing
lever into 2 posi-
tion.
AT-250ON vehicle1. Park/neutral position (PNP) switch
adjustmentAT-276
2. Throttle position sensor (Adjustment) EC-174
3. Overrun clutch solenoid valve AT-185
4. Shift solenoid valve B AT-172
5. Shift solenoid valve A AT-168
6. Control valve assembly AT-273
7. Manual control linkage adjustment AT-276
OFF vehicle8. Brake band AT-333
9. Overrun clutch AT-320
Does not change
from 1
2to 11in 1
position.ON vehicle1. Park/neutral position (PNP) switch
adjustmentAT-276
2. Vehicle speed sensor´A/T (Revolution
sensor) and vehicle speed sensor´MTRAT- 111 , 1 9 7
3. Shift solenoid valve A AT-168
4. Control valve assembly AT-273
5. Overrun clutch solenoid valve AT-185
OFF vehicle6. Overrun clutch AT-320
7. Low & reverse brake AT-324
No Up ShiftFailure to change
gear from D
1to
D
2.ON vehicle1. Park/neutral position (PNP) switch
adjustmentAT-276
2. Manual control linkage adjustment AT-276
3. Shift solenoid valve A AT-168
4. Control valve assembly AT-273
5. Vehicle speed sensor´A/T (Revolution
sensor) and vehicle speed sensor´MTRAT- 111 , 1 9 7
OFF vehicle 6. Brake band AT-333
Failure to change
gear from D
2to
D
3.ON vehicle1. Park/neutral position (PNP) switch
adjustmentAT-276
2. Manual control linkage adjustment AT-276
3. Shift solenoid valve B AT-172
4. Control valve assembly AT-273
5. Vehicle speed sensor´A/T (Revolution
sensor) and vehicle speed sensor´MTRAT- 111 , 1 9 7
OFF vehicle6. High clutch AT-317
7. Brake band AT-333
TROUBLE DIAGNOSIS Ð GENERAL DESCRIPTION
Symptom Chart (Cont'd)
AT-84

Items Symptom Condition Diagnostic Item Reference Page
No Up ShiftFailure to change
gear from D
3to
D
4.ON vehicle1. Park/neutral position (PNP) switch
adjustmentAT-276
2. Manual control linkage adjustment AT-276
3. Shift solenoid valve A AT-168
4. Vehicle speed sensor´A/T (Revolution
sensor) and vehicle speed sensor´MTRAT- 111 , 1 9 7
5. A/T fluid temperature sensor AT-105
OFF vehicle 6. Brake band AT-333
A/T does not shift
to D
4when driv-
ing with overdrive
control switch ON.ON vehicle1. Throttle position sensor (Adjustment) EC-174
2. Park/neutral position (PNP) switch
adjustmentAT-276
3. Vehicle speed sensor´A/T (Revolution
sensor) and vehicle speed sensor´MTRAT- 111 , 1 9 7
4. Shift solenoid valve A AT-168
5. Overrun clutch solenoid valve AT-185
6. Control valve assembly AT-273
7. A/T fluid temperature sensor AT-105
8. Line pressure solenoid valve AT-162
OFF vehicle9. Brake band AT-333
10. Overrun clutch AT-320
Slips/Will Not
EngageVehicle will not
run in R position
(but runs in D, 2
and 1 positions).
Clutch slips.
Very poor accel-
eration.
AT-227ON vehicle1. Manual control linkage adjustment AT-276
2. Line pressure test AT-62
3. Line pressure solenoid valve AT-162
4. Control valve assembly AT-273
OFF vehicle5. Reverse clutch AT-314
6. High clutch AT-317
7. Forward clutch AT-320
8. Overrun clutch AT-320
9. Low & reverse brake AT-324
Vehicle will not
run in D and 2
positions (but
runs in 1 and R
positions).ON vehicle 1. Manual control linkage adjustment AT-276
OFF vehicle 2. Low one-way clutch AT-328
GI
MA
EM
LC
EC
FE
TF
PD
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
TROUBLE DIAGNOSIS Ð GENERAL DESCRIPTION
Symptom Chart (Cont'd)
AT-85

Items Symptom Condition Diagnostic Item Reference Page
Slips/Will Not
EngageVehicle will not
run in D, 1, 2
positions (but
runs in R posi-
tion). Clutch slips.
Very poor accel-
eration.
AT-230ON vehicle1. Fluid level AT-59
2. Line pressure test AT-62
3. Line pressure solenoid valve AT-162
4. Control valve assembly AT-273
5. Accumulator N-D AT-273
OFF vehicle6. Reverse clutch AT-314
7. High clutch AT-317
8. Forward clutch AT-320
9. Forward one-way clutch AT-330
10. Low one-way clutch AT-328
Clutches or
brakes slip some-
what in starting.ON vehicle1. Fluid level AT-59
2. Manual control linkage adjustment AT-276
3. Throttle position sensor (Adjustment) EC-174
4. Line pressure test AT-62
5. Line pressure solenoid valve AT-162
6. Control valve assembly AT-273
7. Accumulator N-D AT-273
OFF vehicle8. Forward clutch AT-320
9. Reverse clutch AT-314
10. Low & reverse brake AT-324
11. Oil pump AT-297
12. Torque converter AT-286
No creep at all.
AT-227, 230ON vehicle1. Fluid level AT-59
2. Line pressure test AT-62
3. Control valve assembly AT-273
OFF vehicle4. Forward clutch AT-320
5. Oil pump AT-297
6. Torque converter AT-286
Almost no shock
or clutches slip-
ping in change
from D
1to D2.ON vehicle1. Fluid level AT-59
2. Throttle position sensor (Adjustment) EC-174
3. Line pressure test AT-62
4. Accumulator servo release AT-273
5. Control valve assembly AT-273
OFF vehicle 6. Brake band AT-333
TROUBLE DIAGNOSIS Ð GENERAL DESCRIPTION
Symptom Chart (Cont'd)
AT-86

Items Symptom Condition Diagnostic Item Reference Page
Slips/Will Not
EngageAlmost no shock
or slipping in
change from D
2to
D
3.ON vehicle1. Fluid level AT-59
2. Throttle position sensor (Adjustment) EC-174
3. Line pressure test AT-62
4. Control valve assembly AT-273
OFF vehicle5. High clutch AT-317
6. Forward clutch AT-320
Almost no shock
or slipping in
change from D
3to
D
4.ON vehicle1. Fluid level AT-59
2. Throttle position sensor (Adjustment) EC-174
3. Line pressure test AT-62
4. Control valve assembly AT-273
OFF vehicle5. High clutch AT-317
6. Brake band AT-333
Races extremely
fast or slips in
changing from D
4to D3when
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. High clutch AT-317
7. Forward clutch AT-320
Races extremely
fast or slips in
changing from D
4to D2when
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. Shift solenoid valve A AT-168
6. Control valve assembly AT-273
OFF vehicle7. Brake band AT-333
8. Forward clutch AT-320
Races extremely
fast or slips in
changing from D
3to D2when
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
6. A/T fluid temperature sensor AT-105
OFF vehicle7. Brake band AT-333
8. Forward clutch AT-320
9. High clutch AT-317
GI
MA
EM
LC
EC
FE
TF
PD
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
TROUBLE DIAGNOSIS Ð GENERAL DESCRIPTION
Symptom Chart (Cont'd)
AT-87

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

Items Symptom Condition Diagnostic Item Reference Page
NOT USEDVehicle runs in N
position.
AT-223ON vehicle 1. Manual control linkage adjustment AT-276
OFF vehicle2. Forward clutch AT-320
3. Reverse clutch AT-314
4. Overrun clutch AT-320
Vehicle braked
when shifting into
R position.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
5. Control valve assembly AT-273
OFF vehicle6. High clutch AT-317
7. Brake band AT-333
8. Forward clutch AT-320
9. Overrun clutch AT-320
Excessive creep. ON vehicle 1. Engine idling rpm EC-431
Engine stops
when shifting
lever into R, D, 2
and 1.ON vehicle1. Engine idling rpm EC-431
2. Torque converter clutch solenoid valve AT-148
3. Control valve assembly AT-273
OFF vehicle 4. Torque converter AT-286
Vehicle braked by
gear change from
D
1to D2.ON vehicle 1. Fluid level AT-59
OFF vehicle2. Reverse clutch AT-314
3. Low & reverse brake AT-324
4. High clutch AT-317
5. Low one-way clutch AT-328
Vehicle braked by
gear change from
D
2to D3.ON vehicle 1. Fluid level AT-59
OFF vehicle 2. Brake band AT-333
Vehicle braked by
gear change from
D
3to D4.ON vehicle 1. Fluid level AT-59
OFF vehicle2. Overrun clutch AT-320
3. Forward one-way clutch AT-330
4. Reverse clutch AT-314
GI
MA
EM
LC
EC
FE
TF
PD
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
TROUBLE DIAGNOSIS Ð GENERAL DESCRIPTION
Symptom Chart (Cont'd)
AT-89

Items Symptom Condition Diagnostic Item Reference Page
NOT USEDMaximum speed
not attained.
Acceleration poor.ON vehicle1. Fluid level AT-59
2. Park/neutral position (PNP) switch
adjustmentAT-276
3. Shift solenoid valve A AT-168
4. Shift solenoid valve B AT-172
5. Control valve assembly AT-273
OFF vehicle6. Reverse clutch AT-314
7. High clutch AT-317
8. Brake band AT-333
9. Low & reverse brake AT-324
10. Oil pump AT-297
11. Torque converter AT-286
Transmission
noise in D, 2, 1
and R positions.ON vehicle 1. Fluid level AT-59
ON vehicle 2. Torque converter AT-286
Engine brake
does not operate
in ª1º position.
AT-252ON vehicle1. Park/neutral position (PNP) switch
adjustmentAT-276
2. Manual control linkage adjustment AT-276
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. Shift solenoid valve A AT-168
6. Control valve assembly AT-273
7. Overrun clutch solenoid valve AT-185
OFF vehicle8. Overrun clutch AT-320
9. Low & reverse brake AT-324
Transmission
overheats.ON vehicle1. Fluid level AT-59
2. Engine idling rpm EC-431
3. Throttle position sensor (Adjustment) EC-174
4. Line pressure test AT-62
5. Line pressure solenoid valve AT-162
6. Control valve assembly AT-273
OFF vehicle7. Oil pump AT-297
8. Reverse clutch AT-314
9. High clutch AT-317
10. Brake band AT-333
11. Forward clutch AT-320
12. Overrun clutch AT-320
13. Low & reverse brake AT-324
14. Torque converter AT-286
TROUBLE DIAGNOSIS Ð GENERAL DESCRIPTION
Symptom Chart (Cont'd)
AT-90