2005 INFINITI QX4 Factory Service Manual

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Page 137 of 3419

INFINITI QX4 2005 Factory Service Manual AT-66
TROUBLE DIAGNOSIS
Revision: October 20052005 QX56
20
Slips/Will
Not
engageWhen “D” position,
remains in 3rd gear.ON vehicle1. Fluid level and stateAT-5 0
2. Vehicle speed sensor A/T and v

Page 138 of 3419

INFINITI QX4 2005 Factory Service Manual TROUBLE DIAGNOSIS
AT-67
D
E
F
G
H
I
J
K
L
MA
B
AT
Revision: October 20052005 QX56
22
Slips/Will
Not
EngageWhen “D” position,
remains in 5th gear.ON vehicle1. Fluid level and stateAT- 5 0
2. Veh

Page 139 of 3419

INFINITI QX4 2005 Factory Service Manual AT-68
TROUBLE DIAGNOSIS
Revision: October 20052005 QX56
25
Slips/Will
Not
engageDoes not hold lock-up
condition.
Refer toAT- 2 0 6 , "A/T
Does Not Hold Lock-
up Condition" .ON vehicle1. Fluid lev

Page 140 of 3419

INFINITI QX4 2005 Factory Service Manual TROUBLE DIAGNOSIS
AT-69
D
E
F
G
H
I
J
K
L
MA
B
AT
Revision: October 20052005 QX56
28
Slips/Will
Not
engageNo shock at all or the
clutch slips when
vehicle changes
speed D
2 → D3 .ON vehicle1.

Page 141 of 3419

INFINITI QX4 2005 Factory Service Manual AT-70
TROUBLE DIAGNOSIS
Revision: October 20052005 QX56
30
Slips/Will
Not
engageNo shock at all or the
clutch slips when
vehicle changes
speed D
4 → D5 .ON vehicle1. Fluid level and stateAT-5

Page 142 of 3419

INFINITI QX4 2005 Factory Service Manual TROUBLE DIAGNOSIS
AT-71
D
E
F
G
H
I
J
K
L
MA
B
AT
Revision: October 20052005 QX56
32
Slips/Will
Not
engageWhen you press the
accelerator pedal and
shift speed D4 → D3
the engine idles or the

Page 143 of 3419

INFINITI QX4 2005 Factory Service Manual AT-72
TROUBLE DIAGNOSIS
Revision: October 20052005 QX56
34
Slips/Will
Not
EngageWhen you press the
accelerator pedal and
shift speed D2 → D1
the engine idles or the
transmission slips.ON veh

Page 144 of 3419

INFINITI QX4 2005 Factory Service Manual TROUBLE DIAGNOSIS
AT-73
D
E
F
G
H
I
J
K
L
MA
B
AT
Revision: October 20052005 QX56
36
Slips/Will
Not
EngageWith selector lever in
“R” position, accelera-
tion is extremely poor.ON vehicle1. Flui

TROUBLE DIAGNOSIS
AT-73
D
E
F
G
H
I
J
K
L
MA
B
AT
Revision: October 20052005 QX56
36
Slips/Will
Not
EngageWith selector lever in
“R” position, accelera-
tion is extremely poor.ON vehicle1. Fluid level and stateAT- 5 0
2. Line pressure testAT- 5 1
3. Accelerator pedal position sensorAT- 1 2 3
4. ATF pressure switch 6, high and low reverse clutch sole-
noid valveAT- 1 6 6,
AT- 1 5 2
5. CAN communication lineAT- 9 5
6. PNP switchAT- 1 0 4
7. Control cable adjustmentAT- 2 2 8
8. Control valve with TCMAT- 2 3 1
OFF vehicle9. Gear systemAT- 2 5 010. Output shaftAT- 2 6 2
11. Reverse brakeAT- 2 6 2
37While starting off by
accelerating in 1st,
engine races or slip-
page occurs.ON vehicle1. Fluid level and stateAT- 5 0
2. Line pressure testAT- 5 1
3. Accelerator pedal position sensorAT- 1 2 3
4. CAN communication lineAT- 9 5
5. Control valve with TCMAT- 2 3 1
OFF vehicle6. Torque converterAT- 2 6 2
7. Oil pump assemblyAT- 2 8 0
8. 3rd one-way clutchAT- 2 8 2
9. 1st one-way clutchAT- 2 8 9
10. Gear systemAT- 2 5 0
11. Reverse brakeAT- 2 6 2
12. Forward one- way clutch (Parts behind drum support is
impossible to perform inspection by disassembly. Refer to
AT- 1 6
, AT-1 7 .)AT- 2 6 2
13. Forward brake (Parts behind drum support is impossible
to perform inspection by disassembly. Refer to AT- 1 6
, AT- 1 7
.)AT- 2 6 2
38While accelerating in
2nd, engine races or
slippage occurs.ON vehicle1. Fluid level and stateAT- 5 0
2. Line pressure testAT- 5 1
3. Accelerator pedal position sensorAT- 1 2 3
4. CAN communication lineAT- 9 5
5. ATF pressure switch 5 and direct clutch solenoid valveAT- 1 6 4,
AT- 1 4 8
6. Control valve with TCMAT- 2 3 1
OFF vehicle7. Torque converterAT- 2 6 2
8. Oil pump assemblyAT- 2 8 0
9. 3rd one-way clutchAT- 2 8 2
10. Gear systemAT- 2 5 0
11. Direct clutchAT- 2 9 6
12. Forward brake (Parts behind drum support is impossible
to perform inspection by disassembly. Refer to AT- 1 6
, AT- 1 7
.)AT- 2 6 2
No. Items Symptom Condition Diagnostic ItemReference
page

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