2001 INFINITI QX4 IDX

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Page 246 of 2395

INFINITI QX4 2001  Factory Service Manual 7 DETECT MALFUNCTIONING ITEM
1. Remove control valve Assembly. Refer to AT-273.
2. Check the following items:
IShift valve B
IShift solenoid valve B
IPilot valve
IPilot filter
3. Disassemble A/T.
4. C

Page 248 of 2395

INFINITI QX4 2001  Factory Service Manual 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.
4 CHECK A/T FLUID CONDI

Page 250 of 2395

INFINITI QX4 2001  Factory Service Manual 12. A/T Does Not Perform Lock-up=NBAT0084SYMPTOM:
A/T does not perform lock-up at the specified speed.
1 CHECK SELF-DIAGNOSTIC RESULTS
Does self-diagnosis show damage to torque converter clutch soleno

Page 252 of 2395

INFINITI QX4 2001  Factory Service Manual 13. A/T Does Not Hold Lock-up Condition=NBAT0085SYMPTOM:
A/T does not hold lock-up condition for more than 30 seconds.
1 CHECK DIAGNOSTIC RESULTS
Does self-diagnosis show damage to engine speed signal

Page 254 of 2395

INFINITI QX4 2001  Factory Service Manual 14. Lock-up Is Not Released=NBAT0086SYMPTOM:
Lock-up is not released when accelerator pedal is released.
1 CHECK THROTTLE POSITION SWITCH CIRCUIT
With CONSULT-II
Does ªTCM INPUT SIGNALSº in Data Mon

Page 256 of 2395

INFINITI QX4 2001  Factory Service Manual 3 CHECK A/T FLUID CONDITION
1. Remove oil pan.
2. Check A/T fluid condition.
SAT171B
OK or NG
OK©GO TO 4.
NG©GO TO 6.
4 DETECT MALFUNCTIONING ITEM
1. Remove control valve assembly. Refer to AT-273.

Page 258 of 2395

INFINITI QX4 2001  Factory Service Manual 17. A/T Does Not Shift: D4®D3, When
Overdrive Control Switch ªONº®ªOFFº
=NBAT0089SYMPTOM:
A/T does not shift from D
4to D3when changing overdrive
control switch to ªOFFº position.
1 CHECK OVER

Page 260 of 2395

INFINITI QX4 2001  Factory Service Manual 19. A/T Does Not Shift: 22®11, When Selector
Lever ª2º®ª1º Position
=NBAT0091SYMPTOM:
A/T does not shift from 2
2to 11when changing selector lever
from ª2º to ª1º position.
1 CHECK PNP SWITC