2001 INFINITI QX4 IDX

5. Large Shock. ªNº®ªRº Position=NBAT0077SYMPTOM:
There is large shock when changing from ªNº to ªRº position.
1 CHECK SELF-DIAGNOSTIC RESULTS
Does self-diagnosis show damage to A/T fluid temperature sensor, line pressure solenoid valve or throttle position sensor
circuit?
SAT579I
YesorNo
Ye s©Check damaged circuit. Refer to ªDTC P0710, DTC P0745 or DTC P1705º, AT-105, 162
or 176.
No©GO TO 2.
2 CHECK THROTTLE POSITION SENSOR
Check throttle position sensor. Refer to EC-174, ªDescriptionº.
SAT142K
OK or NG
OK©GO TO 3.
NG©Repair or replace throttle position sensor.
GI
MA
EM
LC
EC
FE
TF
PD
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
TROUBLE DIAGNOSES FOR SYMPTOMS
5. Large Shock. ªNº®ªRº Position
AT-225

6. Vehicle Does Not Creep Backward In ªRº
Position
=NBAT0078SYMPTOM:
Vehicle does not creep backward when selecting ªRº position.
1 CHECK A/T FLUID LEVEL
Check A/T fluid level again.
SAT638A
OK or NG
OK©GO TO 2.
NG©Refill ATF.
2 CHECK STALL TEST
Check stall revolution with selector lever in ª1º and ªRº positions.
Refer to AT-356.
SAT493G
OK or NG
OK©GO TO 3.
OK in ª1º position, NG in
ªRº position©1. Remove control valve assembly. Refer to ªON-VEHICLE SERVICEº, AT-273.
2. Check the following items:
IValves to control line pressure (Pressure regulator valve, pressure modifier valve, pilot
valve and pilot filter)
ILine pressure solenoid valve
3. Disassemble A/T.
4. Check the following items:
IOil pump assembly
ITorque converter
IReverse clutch assembly
IHigh clutch assembly
NG in both ª1º and ªRº
positions©GO TO 6.
GI
MA
EM
LC
EC
FE
TF
PD
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
TROUBLE DIAGNOSES FOR SYMPTOMS
6. Vehicle Does Not Creep Backward In ªRº Position
AT-227

6 DETECT MALFUNCTIONING ITEM
1. Remove control valve assembly. Refer to ªON-VEHICLE SERVICEº, AT-273.
2. Check the following items:
IValves to control line pressure (Pressure regulator valve, pressure modifier valve, pilot valve and pilot filter)
ILine pressure solenoid valve
3. Disassemble A/T.
4. Check the following items:
IOil pump assembly
ITorque converter
IReverse clutch assembly
IHigh clutch assembly
ILow & reverse brake assembly
ILow one-way clutch
©Repair or replace damaged parts.GI
MA
EM
LC
EC
FE
TF
PD
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
TROUBLE DIAGNOSES FOR SYMPTOMS
6. Vehicle Does Not Creep Backward In ªRº Position (Cont'd)
AT-229

3 CHECK LINE PRESSURE
Check line pressure at idle with selector lever in ªRº position.
Refer to ªLINE PRESSURE TESTº, AT-62.
SAT494G
OK or NG
OK©GO TO 4.
NG©1. Remove control valve assembly.
Refer to AT-273.
2. Check the following items:
IValves to control line pressure (Pressure regulator valve, pressure modifier valve, pilot
valve and pilot filter)
ILine pressure solenoid valve
3. Disassemble A/T.
4. Check the following items:
IOil pump assembly
4 CHECK A/T FLUID CONDITION
1. Remove oil pan.
2. Check A/T fluid condition.
SAT171B
OK or NG
OK©GO TO 5.
NG©GO TO 6.
5 CHECK SYMPTOM
Check again.
OK or NG
OK©INSPECTION END
NG©1. Perform TCM input/output signal inspection.
2. If NG, recheck TCM pin terminals for damage or loose connection with harness con-
nector.
GI
MA
EM
LC
EC
FE
TF
PD
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
TROUBLE DIAGNOSES FOR SYMPTOMS
7. Vehicle Does Not Creep Forward In ªDº, ª2º Or ª1º Position (Cont'd)
AT-231

8. Vehicle Cannot Be Started From D1=NBAT0080SYMPTOM:
Vehicle cannot be started from D
1on Cruise test Ð Part 1.
1 CHECK SYMPTOM
Is ª6. Vehicle Does Not Creep Backward In ªRº Positionº OK?
YesorNo
Ye s©GO TO 2.
No©Go to ª6. Vehicle Does Not Creep Backward In ªRº Positionº, AT-227.
2 CHECK SELF-DIAGNOSTIC RESULTS
Does self-diagnosis show damage to vehicle speed sensor´A/T (revolution sensor), shift solenoid valve A, B or vehicle
speed sensor´MTR after cruise test?
SAT686I
YesorNo
Ye s©Check damaged circuit. Refer to ªDTC P0720, DTC P0750, DTC P0755 or VEHICLE
SPEED SENSOR. MTRº, AT-111, 168, 172 or 197.
No©GO TO 3.
3 CHECK THROTTLE POSITION SENSOR
Check throttle position sensor. Refer to EC-174, ªDescriptionº.
SAT142K
OK or NG
OK©GO TO 4.
NG©Repair or replace throttle position sensor.
GI
MA
EM
LC
EC
FE
TF
PD
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
TROUBLE DIAGNOSES FOR SYMPTOMS
8. Vehicle Cannot Be Started From D1
AT-233

7 CHECK SYMPTOM
Check again.
OK or NG
OK©INSPECTION END
NG©1. Perform TCM input/output signal inspection.
2. If NG, recheck TCM pin terminals for damage or loose connection with harness con-
nector.
8 DETECT MALFUNCTIONING ITEM
1. Remove control valve assembly.
Refer to AT-273.
2. Check the following items:
IShift valve A
IShift valve B
IShift solenoid valve A
IShift solenoid valve B
IPilot valve
IPilot filter
3. Disassemble A/T.
4. Check the following items:
IForward clutch assembly
IForward one-way clutch
ILow one-way clutch
IHigh clutch assembly
ITorque converter
IOil pump assembly
OK or NG
OK©GO TO 7.
NG©Repair or replace damaged parts.
GI
MA
EM
LC
EC
FE
TF
PD
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
TROUBLE DIAGNOSES FOR SYMPTOMS
8. Vehicle Cannot Be Started From D1(Cont'd)
AT-235

4 CHECK THROTTLE POSITION SENSOR
Check throttle position sensor. Refer to EC-174, ªDescriptionº.
SAT142K
OK or NG
OK©GO TO 5.
NG©Repair or replace throttle position sensor.
5 CHECK A/T FLUID CONDITION
1. Remove oil pan.
2. Check A/T fluid condition.
SAT171B
OK or NG
OK©GO TO 6.
NG©GO TO 8.
6 DETECT MALFUNCTIONING ITEM
1. Remove control valve. Refer to AT-273.
2. Check the following items:
IShift valve A
IShift solenoid valve A
IPilot valve
IPilot filter
OK or NG
OK©GO TO 7.
NG©Repair or replace damaged parts.
GI
MA
EM
LC
EC
FE
TF
PD
AX
SU
BR
ST
RS
BT
HA
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IDX
TROUBLE DIAGNOSES FOR SYMPTOMS
9. A/T Does Not Shift: D1®D2Or Does Not Kickdown: D4®D2(Cont'd)
AT-237

10. A/T Does Not Shift: D2®D3=NBAT0082SYMPTOM:
A/T does not shift from D
2to D3at the specified speed.
1 CHECK SYMPTOM
Are ª7. Vehicle Does Not Creep Forward In ªDº, ª2º Or ª1º Positionº and ª8. Vehicle Cannot Be Started From D1º OK?
YesorNo
Ye s©GO TO 2.
No©Go to ª7. Vehicle Does Not Creep Forward In ªDº, ª2º Or ª1º Positionº and ª8. Vehicle
Cannot Be Started From D
1º, AT-230, 233.
2 CHECK PNP SWITCH CIRCUIT
With CONSULT-II
Does ªTCM INPUT SIGNALSº in Data Monitor show damage to PNP switch circuit?
Without CONSULT-II
Does self-diagnosis show damage to PNP switch circuit?
SAT367J
YesorNo
Ye s©Check PNP switch circuit. Refer to ªDTC P0705º, AT-99.
No©GO TO 3.
3 CHECK THROTTLE POSITION SENSOR
Check throttle position sensor. Refer to EC-174, ªDescriptionº.
SAT142K
OK or NG
OK©GO TO 4.
NG©Repair or replace throttle position sensor.
GI
MA
EM
LC
EC
FE
TF
PD
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
TROUBLE DIAGNOSES FOR SYMPTOMS
10. A/T Does Not Shift: D2®D3
AT-239