2006 INFINITI QX56 sensor

AT-70
TROUBLE DIAGNOSIS
Revision: November 20092006 QX56
28
Slips/Will
Not
engage No shock at all or the
clutch slips when
vehicle changes
speed D
2
→ D3 . ON vehicle
1. Fluid level and state
AT- 5 1
2. Vehicle speed sensor A/T and vehicle speed sensor MTRAT- 111,
AT- 1 3 2
3. ATF pressure switch 6, high and low reverse clutch sole-
noid valve AT- 1 6 5,
AT- 1 5 1
4. CAN communication line AT- 9 6
5. Line pressure testAT- 5 2
6. Control valve with TCMAT- 2 3 0
OFF vehicle7. Torque converter
AT- 2 6 4
8. Oil pump assemblyAT- 2 8 2
9. 3rd one-way clutchAT- 2 8 4
10. Gear systemAT- 2 5 0
11. High and low reverse clutchAT- 2 9 6
12. Forward one- way clutch (Parts behind drum support is
impossible to perform inspection by disassembly. Refer to
AT- 1 7
, AT- 1 8 .) AT- 2 6 4
13. Forward brake (Parts behind drum support is impossible
to perform inspection by disassembly. Refer to
AT- 1 7
, AT- 1 8
.) AT- 2 6 4
29No shock at all or the
clutch slips when
vehicle changes
speed D
3
→ D4 . ON vehicle 1. Fluid level and state
AT- 5 1
2. Vehicle speed sensor A/T and vehicle speed sensor MTRAT- 111,
AT- 1 3 2
3. ATF pressure switch 3 and input clutch solenoid valve AT- 1 6 1,
AT- 1 3 9

4. ATF pressure switch 1 and front brake solenoid valve AT- 1 5 9
,
AT- 1 4 3
5. CAN communication line AT- 9 6
6. Line pressure testAT- 5 2
7. Control valve with TCMAT- 2 3 0
OFF vehicle8. Torque converter
AT- 2 6 4
9. Oil pump assemblyAT- 2 8 2
10. Input clutchAT- 2 8 6
11. Gear systemAT- 2 5 0
12. High and low reverse clutchAT- 2 9 6
13. Direct clutchAT- 2 9 8
No. ItemsSymptom Condition Diagnostic ItemReference
page

TROUBLE DIAGNOSISAT-71
DE
F
G H
I
J
K L
M A
B
AT
Revision: November 2009 2006 QX56
30
Slips/Will
Not
engage No shock at all or the
clutch slips when
vehicle changes
speed D
4 →
D5 . ON vehicle 1. Fluid level and state
AT- 5 1
2. Vehicle speed sensor A/T and vehicle speed sensor MTRAT- 111,
AT-132
3. ATF pressure switch 1 and front brake solenoid valve AT-159,
AT-143
4. ATF pressure switch 5 and direct clutch solenoid valve AT-163,
AT-147
5. CAN communication line AT- 9 6
6. Line pressure testAT- 5 2
7. Control valve with TCMAT-230
OFF vehicle8. Torque converter
AT-264
9. Oil pump assemblyAT-282
10. Front brake (brake band)AT-264
11. Input clutchAT-286
12. Gear systemAT-250
13. High and low reverse clutchAT-296
31When you press the
accelerator pedal and
shift speed D5 →
D4
the engine idles or the
transmission slips. ON vehicle
1. Fluid level and state
AT- 5 1
2. Vehicle speed sensor A/T and vehicle speed sensor MTRAT- 111,
AT-132
3. ATF pressure switch 1 and front brake solenoid valve AT-159,
AT-143
4. ATF pressure switch 5 and direct clutch solenoid valve AT-163,
AT-147
5. CAN communication line AT- 9 6
6. Line pressure testAT- 5 2
7. Control valve with TCMAT-230
OFF vehicle8. Torque converter
AT-264
9. Oil pump assemblyAT-282
10. Input clutchAT-286
11. Gear systemAT-250
12. High and low reverse clutchAT-296
13. Direct clutchAT-298
No. ItemsSymptom Condition Diagnostic ItemReference
page

AT-72
TROUBLE DIAGNOSIS
Revision: November 20092006 QX56
32
Slips/Will
Not
engage When you press the
accelerator pedal and
shift speed D4
→ D3
the engine idles or the
transmission slips. ON vehicle
1. Fluid level and state
AT- 5 1
2. Vehicle speed sensor A/T and vehicle speed sensor MTRAT- 111,
AT- 1 3 2
3. ATF pressure switch 3 and input clutch solenoid valve AT- 1 6 1,
AT- 1 3 9
4. ATF pressure switch 1 and front brake solenoid valve AT- 1 5 9,
AT- 1 4 3
5. CAN communication line AT- 9 6
6. Line pressure testAT- 5 2
7. Control valve with TCMAT- 2 3 0
OFF vehicle8. Torque converter
AT- 2 6 4
9. Oil pump assemblyAT- 2 8 2
10. 3rd one-way clutchAT- 2 8 4
11. Gear systemAT- 2 5 0
12. High and low reverse clutchAT- 2 9 6
13. Forward one- way clutch (Parts behind drum support is
impossible to perform inspection by disassembly. Refer to
AT- 1 7
, AT- 1 8 .) AT- 2 6 4
14. Forward brake (Parts behind drum support is impossible
to perform inspection by disassembly. Refer to
AT- 1 7
, AT- 1 8
.) AT- 2 6 4
33When you press the
accelerator pedal and
shift speed D3
→ D2
the engine idles or the
transmission slips. ON vehicle
1. Fluid level and state
AT- 5 1
2. Vehicle speed sensor A/T and vehicle speed sensor MTRAT- 111,
AT- 1 3 2
3. ATF pressure switch 6, high and low reverse clutch sole-
noid valve AT- 1 6 5,
AT- 1 5 1
4. ATF pressure switch 5 and direct clutch solenoid valve AT- 1 6 3,
AT- 1 4 7
5. CAN communication line AT- 9 6
6. Line pressure testAT- 5 2
7. Control valve with TCMAT- 2 3 0
OFF vehicle8. Torque converter
AT- 2 6 4
9. Oil pump assemblyAT- 2 8 2
10. 3rd one-way clutchAT- 2 8 4
11. Gear systemAT- 2 5 0
12. Direct clutchAT- 2 9 8
13. Forward brake (Parts behind drum support is impossible
to perform inspection by disassembly. Refer to AT- 1 7
, AT- 1 8
.) AT- 2 6 4
No. Items
Symptom Condition Diagnostic ItemReference
page

TROUBLE DIAGNOSISAT-73
DE
F
G H
I
J
K L
M A
B
AT
Revision: November 2009 2006 QX56
34
Slips/Will
Not
Engage When you press the
accelerator pedal and
shift speed D2 →
D1
the engine idles or the
transmission slips. ON vehicle
1. Fluid level and state
AT- 5 1
2. Vehicle speed sensor A/T and vehicle speed sensor MTRAT- 111,
AT-132
3. ATF pressure switch 5 and direct clutch solenoid valve AT-163,
AT-147
4. CAN communication line AT- 9 6
5. Line pressure testAT- 5 2
6. Control valve with TCMAT-230
OFF vehicle7. Torque converter
AT-264
8. Oil pump assemblyAT-282
9. 3rd one-way clutchAT-284
10. 1st one-way clutchAT-291
11. Gear systemAT-250
12. Reverse brakeAT-264
13. Forward one- way clutch (Parts behind drum support is
impossible to perform inspection by disassembly. Refer to
AT- 1 7
, AT- 1 8 .) AT-264
14. Forward brake (Parts behind drum support is impossible
to perform inspection by disassembly. Refer to AT- 1 7
, AT- 1 8
.) AT-264
35With selector lever in
“
D ” position, accelera-
tion is extremely poor. ON vehicle
1. Fluid level and state
AT- 5 1
2. Line pressure testAT- 5 2
3. Accelerator pedal position sensorAT-124
4. CAN communication line AT- 9 6
5. PNP switchAT-105
6. Control cable adjustmentAT-227
7. Control valve with TCMAT-230
OFF vehicle8. Torque converter
AT-264
9. Oil pump assemblyAT-282
10. 1st one-way clutchAT-291
11. Gear systemAT-250
12. Reverse brakeAT-264
13. Forward one- way clutch (Parts behind drum support is
impossible to perform inspection by disassembly. Refer to
AT- 1 7
, AT- 1 8 .) AT-264
14. Forward brake (Parts behind drum support is impossible
to perform inspection by disassembly. Refer to AT- 1 7
, AT- 1 8
.) AT-264
No. Items
Symptom Condition Diagnostic ItemReference
page

AT-74
TROUBLE DIAGNOSIS
Revision: November 20092006 QX56
36
Slips/Will
Not
Engage With selector lever in
“
R ” position, accelera-
tion is extremely poor. ON vehicle1. Fluid level and state
AT- 5 1
2. Line pressure testAT- 5 2
3. Accelerator pedal position sensorAT- 1 2 4
4. ATF pressure switch 6, high and low reverse clutch sole-
noid valveAT- 1 6 5,
AT- 1 5 1
5. CAN communication line AT- 9 6
6. PNP switchAT- 1 0 5
7. Control cable adjustmentAT- 2 2 7
8. Control valve with TCMAT- 2 3 0
OFF vehicle9. Gear system
AT- 2 5 010. Output shaftAT- 2 6 4
11. Reverse brakeAT- 2 6 4
37While starting off by
accelerating in 1st,
engine races or slip-
page occurs. ON vehicle
1. Fluid level and state
AT- 5 1
2. Line pressure testAT- 5 2
3. Accelerator pedal position sensorAT- 1 2 4
4. CAN communication line AT- 9 6
5. Control valve with TCMAT- 2 3 0
OFF vehicle6. Torque converter
AT- 2 6 4
7. Oil pump assemblyAT- 2 8 2
8. 3rd one-way clutchAT- 2 8 4
9. 1st one-way clutchAT- 2 9 1
10. Gear systemAT- 2 5 0
11. Reverse brakeAT- 2 6 4
12. Forward one- way clutch (Parts behind drum support is
impossible to perform inspection by disassembly. Refer to
AT- 1 7
, AT- 1 8 .) AT- 2 6 4
13. Forward brake (Parts behind drum support is impossible
to perform inspection by disassembly. Refer to
AT- 1 7
, AT- 1 8
.) AT- 2 6 4
38While accelerating in
2nd, engine races or
slippage occurs. ON vehicle
1. Fluid level and state
AT- 5 1
2. Line pressure testAT- 5 2
3. Accelerator pedal position sensorAT- 1 2 4
4. CAN communication line AT- 9 6
5. ATF pressure switch 5 and direct clutch solenoid valveAT- 1 6 3,
AT- 1 4 7
6. Control valve with TCM AT- 2 3 0
OFF vehicle7. Torque converter
AT- 2 6 4
8. Oil pump assemblyAT- 2 8 2
9. 3rd one-way clutchAT- 2 8 4
10. Gear systemAT- 2 5 0
11. Direct clutchAT- 2 9 8
12. Forward brake (Parts behind drum support is impossible
to perform inspection by disassembly. Refer to AT- 1 7
, AT- 1 8
.) AT- 2 6 4
No. Items
Symptom Condition Diagnostic ItemReference
page

TROUBLE DIAGNOSISAT-75
DE
F
G H
I
J
K L
M A
B
AT
Revision: November 2009 2006 QX56
39
Slips/Will
Not
Engage While accelerating in
3rd, engine races or
slippage occurs.
ON vehicle
1. Fluid level and state
AT- 5 1
2. Line pressure testAT- 5 2
3. Accelerator pedal position sensorAT-124
4. CAN communication line AT- 9 6
5. ATF pressure switch 6, high and low reverse clutch sole-
noid valveAT-165,
AT-151

6. Control valve with TCM AT-230
OFF vehicle7. Torque converter
AT-264
8. Oil pump assemblyAT-282
9. 3rd one-way clutchAT-284
10. Gear systemAT-250
11. High and low reverse clutchAT-296
12. Forward one- way clutch (Parts behind drum support is
impossible to perform inspection by disassembly. Refer to
AT- 1 7
, AT- 1 8 .) AT-264
13. Forward brake (Parts behind drum support is impossible
to perform inspection by disassembly. Refer to AT- 1 7
, AT- 1 8
.) AT-264
40While accelerating in
4th, engine races or
slippage occurs. ON vehicle
1. Fluid level and state
AT- 5 1
2. Line pressure testAT- 5 2
3. Accelerator pedal position sensorAT-124
4. CAN communication line AT- 9 6
5. ATF pressure switch 3 and input clutch solenoid valveAT-161,
AT-139
6. Control valve with TCM AT-230
OFF vehicle7. Torque converter
AT-264
8. Oil pump assemblyAT-282
9. Input clutchAT-286
10. Gear systemAT-250
11. High and low reverse clutchAT-296
12. Direct clutchAT-298
No. ItemsSymptom Condition Diagnostic ItemReference
page

AT-76
TROUBLE DIAGNOSIS
Revision: November 20092006 QX56
41
Slips/Will
Not
Engage While accelerating in
5th, engine races or
slippage occurs.
ON vehicle
1. Fluid level and state
AT- 5 1
2. Line pressure testAT- 5 2
3. Accelerator pedal position sensorAT- 1 2 4
4. CAN communication line AT- 9 6
5. ATF pressure switch 1 and front brake solenoid valveAT- 1 5 9,
AT- 1 4 3
6. Control valve with TCM AT- 2 3 0
OFF vehicle7. Torque converter
AT- 2 6 4
8. Oil pump assemblyAT- 2 8 2
9. Front brake (brake band)AT- 2 6 4
10. Input clutchAT- 2 8 6
11. Gear systemAT- 2 5 0
12. High and low reverse clutchAT- 2 9 6
42Slips at lock-up. ON vehicle1. Fluid level and state
AT- 5 1
2. Line pressure testAT- 5 2
3. Engine speed signalAT- 11 6
4. Turbine revolution sensorAT- 1 0 9
5. Torque converter clutch solenoid valve AT- 11 8
6. CAN communication line AT- 9 6
7. Control valve with TCMAT- 2 3 0
OFF vehicle8. Torque converter
AT- 2 6 49. Oil pump assemblyAT- 2 8 2
43No creep at all.
Refer to
AT-186, "
Vehi-
cle Does Not Creep
Backward In “R” Posi-
tion" , AT-189, "Ve h i-
cle Does Not Creep
Forward In “D” Posi-
tion"
ON vehicle 1. Fluid level and state
AT- 5 1
2. Line pressure testAT- 5 2
3. Accelerator pedal position sensorAT- 1 2 4
4. ATF pressure switch 5 and direct clutch solenoid valveAT- 1 6 3,
AT- 1 4 7
5. PNP switch AT- 1 0 5
6. CAN communication line AT- 9 6
7. Control cable adjustmentAT- 2 2 7
8. Control valve with TCMAT- 2 3 0
OFF vehicle9. Torque converter
AT- 2 6 4
10. Oil pump assemblyAT- 2 8 2
11. 1st one-way clutchAT- 2 9 1
12. Gear systemAT- 2 5 0
13. Reverse brakeAT- 2 6 4
14. Direct clutchAT- 2 9 8
15. Forward one- way clutch (Parts behind drum support is
impossible to perform inspection by disassembly. Refer to
AT- 1 7
, AT- 1 8 .) AT- 2 6 4
16. Forward brake (Parts behind drum support is impossible
to perform inspection by disassembly. Refer to
AT- 1 7
, AT- 1 8
.) AT- 2 6 4
No. Items
Symptom Condition Diagnostic ItemReference
page

TROUBLE DIAGNOSISAT-77
DE
F
G H
I
J
K L
M A
B
AT
Revision: November 2009 2006 QX5644
Slips/Will
Not
Engage Vehicle cannot run in
all positions.
ON vehicle1. Fluid level and state
AT- 5 1
2. Line pressure testAT- 5 2
3. PNP switchAT-105
4. Control cable adjustmentAT-227
5. Control valve with TCMAT-230
OFF vehicle6. Oil pump assembly
AT-2827. Gear systemAT-250
8. Output shaftAT-264
45With selector lever in
“
D ” position, driving is
not possible. ON vehicle
1. Fluid level and state
AT- 5 1
2. Line pressure testAT- 5 2
3. PNP switchAT-105
4. Control cable adjustmentAT-227
5. Control valve with TCMAT-230
OFF vehicle6. Torque converter
AT-264
7. Oil pump assembly AT-282
8. 1st one-way clutchAT-291
9. Gear systemAT-250
10. Reverse brakeAT-264
11. Forward one- way clutch (Parts behind drum support is
impossible to perform inspection by disassembly. Refer to
AT- 1 7
, AT- 1 8 .) AT-264
12. Forward brake (Parts behind drum support is impossible
to perform inspection by disassembly. Refer to AT- 1 7
, AT- 1 8
.) AT-264
46
With selector lever in
“
R ” position, driving is
not possible. ON vehicle
1. Fluid level and state
AT- 5 1
2. Line pressure testAT- 5 2
3. PNP switchAT-105
4. Control cable adjustmentAT-227
5. Control valve with TCMAT-230
OFF vehicle6. Gear system
AT-2507. Output shaftAT-264
8. Reverse brakeAT-264
47 OthersShift point is high in
“
D ” position. ON vehicle1. Vehicle speed sensor A/T and vehicle speed sensor MTR
AT- 111
,
AT-132
2. Accelerator pedal position sensor AT-124
3. CAN communication line AT- 9 6
4. ATF temperature sensorAT-127
5. Control valve with TCMAT-230
No. ItemsSymptom Condition Diagnostic ItemReference
page