2005 INFINITI QX4 Factory Service Manual

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Page 265 of 3419

INFINITI QX4 2005 Factory Service Manual AT-194
TROUBLE DIAGNOSIS FOR SYMPTOMS
Revision: October 20052005 QX56
7. DETECT MALFUNCTIONING ITEM
1. Check control valve with TCM. Refer to AT- 2 3 1 , "
Control Valve With TCM and A/T Fluid Temper

Page 266 of 3419

INFINITI QX4 2005 Factory Service Manual TROUBLE DIAGNOSIS FOR SYMPTOMS
AT-195
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AT
Revision: October 20052005 QX56
12. DETECT MALFUNCTIONING ITEM
Check the malfunction items. If any items are damaged, repair or replace

Page 267 of 3419

INFINITI QX4 2005 Factory Service Manual AT-196
TROUBLE DIAGNOSIS FOR SYMPTOMS
Revision: October 20052005 QX56
5. DETECT MALFUNCTIONING ITEM
1. Check control valve with TCM. Refer to AT- 2 3 1 , "
Control Valve With TCM and A/T Fluid Temper

Page 268 of 3419

INFINITI QX4 2005 Factory Service Manual TROUBLE DIAGNOSIS FOR SYMPTOMS
AT-197
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Revision: October 20052005 QX56
10. PERFORM TCM INSPECTION
1. Perform TCM input/output signals inspection. Refer to AT-82, "
TCM Input/O

Page 269 of 3419

INFINITI QX4 2005 Factory Service Manual AT-198
TROUBLE DIAGNOSIS FOR SYMPTOMS
Revision: October 20052005 QX56
4. CHECK LINE PRESSURE
Check line pressure at the engine stall point. Refer to AT- 5 1 , "
LINE
PRESSURE TEST" .
OK or NG
OK >> G

Page 270 of 3419

INFINITI QX4 2005 Factory Service Manual TROUBLE DIAGNOSIS FOR SYMPTOMS
AT-199
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AT
Revision: October 20052005 QX56
8. DETECT MALFUNCTIONING ITEM
Check the malfunction items. If any items are damaged, repair or replace

TROUBLE DIAGNOSIS FOR SYMPTOMS
AT-199
D
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MA
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AT
Revision: October 20052005 QX56
8. DETECT MALFUNCTIONING ITEM
Check the malfunction items. If any items are damaged, repair or replace damaged parts. Refer to AT-60,
"Symptom Chart" (Symptom No.11).
OK or NG
OK >> GO TO 9.
NG >> Repair or replace damaged parts.
9. CHECK SYMPTOM
Check again. Refer to AT- 5 5 , "
Cruise Test - Part 1" , AT- 5 7 , "Cruise Test - Part 2" .
OK or NG
OK >>INSPECTION END
NG >> GO TO 10.
10. PERFORM TCM INSPECTION
1. Perform TCM input/output signals inspection. Refer to AT-82, "
TCM Input/Output Signal Reference Val-
ues" .
2. If NG, recheck A/T assembly harness connector terminals for damage or loose connection with harness
connector.
OK or NG
OK >>INSPECTION END
NG >> Repair or replace damaged parts.
11 . DETECT MALFUNCTIONING ITEM
Check the malfunction items. If any items are damaged, repair or replace damaged parts. Refer to AT-60,
"Symptom Chart" (Symptom No.11).
OK or NG
OK >> GO TO 9.
NG >> Repair or replace damaged parts.
A/T Does Not Shift: D3 → D4ECS00CKD
SYMPTOM:
The vehicle does not shift-up from the D3 to D4 gear at the specified speed.
The vehicle does not shift-up from the D3 to D4 gear unless A/T is warmed up.
DIAGNOSTIC PROCEDURE
1. CONFIRM THE SYMPTOM
Check if vehicle creeps forward in “D” position and vehicle can be started from D
1.
OK or NG
OK >> GO TO 2.
NG >> Refer to AT-190, "
Vehicle Does Not Creep Forward In “D” Position" , AT- 1 9 2 , "Vehicle Cannot Be
Started From D1" .
2. CHECK SELF-DIAGNOSTIC RESULTS
Perform self-diagnosis. Refer to AT- 8 5 , "
SELF-DIAGNOSTIC RESULT MODE" .
Do the self-diagnostic results indicate ATF pressure switch 1, ATF pressure switch 3, front brake solenoid
valve, input clutch solenoid valve, accelerator pedal position sensor, vehicle speed sensor A/T (revolution sen-
sor) and vehicle speed sensor MTR?
YES >> Check the malfunctioning system. Refer to AT-160, "DTC P1841 ATF PRESSURE SWITCH 1" ,
AT-162, "
DTC P1843 ATF PRESSURE SWITCH 3" , AT-140, "DTC P1752 INPUT CLUTCH
SOLENOID VALVE" , AT-144, "DTC P1757 FRONT BRAKE SOLENOID VALVE" , AT-123, "DTC

Page 271 of 3419

INFINITI QX4 2005 Factory Service Manual AT-200
TROUBLE DIAGNOSIS FOR SYMPTOMS
Revision: October 20052005 QX56
P1705 THROTTLE POSITION SENSOR" , AT-108, "DTC P0720 VEHICLE SPEED SENSOR A/T
(REVOLUTION SENSOR)" , AT-133, "DTC P1721 VEHICLE SP

Page 272 of 3419

INFINITI QX4 2005 Factory Service Manual TROUBLE DIAGNOSIS FOR SYMPTOMS
AT-201
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Revision: October 20052005 QX56
7. CHECK A/T FLUID CONDITION
1. Remove oil pan. Refer to AT-231, "
Control Valve With TCM and A/T Fluid

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