speed sensor INFINITI FX35 2006 Owner's Manual

AT-56
TROUBLE DIAGNOSIS
Revision: 2006 December 2006 FX35/FX45
Judgement of Line Pressure Test
ROAD TEST
Description

The road test checks overall performance of the A/T and analyzes possible malfunction causes.

The road test is carried out in the following three stages.
1. Check before engine is started. Refer to AT- 5 7
.
2. Check at idle. Refer to AT- 5 7
.
3. Cruise test

Inspect all the items from Part 1 to Part 3. Refer to AT- 5 8 , AT- 6 0 , AT- 6 1 .

Before beginning the road test, check the test procedure and inspection items.

Test all inspection items until the symptom is uncovered. Diagnose NG items when all road tests are com-
plete.
Judgement Possible cause
Idle speed Low for all positions
(“P”, “R”, “N”, “D”,
“M”) Possible causes include malfunctions in the pressure supply system and low oil pump output.
For example

Oil pump wear

Pressure regulator valve or plug sticking or spring fatigue

Oil strainer
oil pump
pressure regulator valve passage oil leak

Engine idle speed too low
Only low for a spe-
cific position Possible causes include an oil pressure leak in a passage or device related to the position after
the pressure is distributed by the manual valve.
High Possible causes include a sensor malfunction or malfunction in the line pressure adjustment func-
tion.
For example

Accelerator pedal position signal malfunction

ATF temperature sensor malfunction

Line pressure solenoid malfunction (sticking in OFF state, filter clog, cut line)

Pressure regulator valve or plug sticking
Stall speed Line pressure does
not rise higher than
the line pressure for
idle. Possible causes include a sensor malfunction or malfunction in the pressure adjustment function.
For example

Accelerator pedal position signal malfunction

TCM breakdown

Line pressure solenoid malfunction (shorting, sticking in ON state)

Pressure regulator valve or plug sticking

Pilot valve sticking or pilot filter clogged
The pressure rises,
but does not enter
the standard posi-
tion. Possible causes include malfunctions in the pressure supply system and malfunction in the pres-
sure adjustment function.
For example

Accelerator pedal position signal malfunction

Line pressure solenoid malfunction (sticking, filter clog)

Pressure regulator valve or plug sticking

Pilot valve sticking or pilot filter clogged
Only low for a spe-
cific position Possible causes include an oil pressure leak in a passage or device related to the position after
the pressure is distributed by the manual valve.

AT-64
TROUBLE DIAGNOSIS
Revision: 2006 December 2006 FX35/FX45
Symptom ChartNCS001BP

The diagnostics item numbers show the sequence for inspection. Check in order from Item 1.

Overhaul and check inside the A/T only if A/T fluid condition is NG. Refer to AT- 5 3 , "A/T Fluid Condition
Check" .
No. Items Symptom Condition Diagnostic Item Reference
page
1 Shift
Shock Large shock. (“N”
→
“D” position)
Refer to AT-193,
"Large Shock (“N” to
“D” Position)" . ON vehicle 1. Engine idle speed
EC-82
(for
VQ35DE)
or EC-742

(for
VK45DE)
2. Engine speed signal AT- 1 2 3
3. Accelerator pedal position sensorAT- 1 3 1
4. Control linkage adjustmentAT- 2 3 1
5. A/T fluid temperature sensorAT- 1 3 4
6. ATF pressure switch 1 and front brake solenoid valve AT- 1 7 1,
AT- 1 5 0
7. CAN communication line AT- 1 0 4
8. A/T fluid level and state AT- 5 3
9. Line pressure testAT- 5 4
10. Control valve with TCMAT- 2 3 9
OFF vehicle 11. Forward brake (Parts behind drum support is impossible
to perform inspection by disassembly. Refer to AT-18, "Cross-sectional View (2WD Models)" , AT-19, "Cross-sec-
tional View (VQ35DE Models for AWD)" or AT- 2 0 , "Cross-
sectional View (VK45DE Models for AWD)" ) AT- 2 9 4
2
Shock is too large
when changing D1 →
D
2 or M1 → M2 . ON vehicle 1. Accelerator pedal position sensor
AT- 1 3 1
2. Control linkage adjustmentAT- 2 3 1
3. ATF pressure switch 5 and direct clutch solenoid valve AT- 1 7 5,
AT- 1 5 4
4. CAN communication line AT- 1 0 4
5. Engine speed signalAT- 1 2 3
6. Turbine revolution sensor AT- 11 6
7. Vehicle speed sensor A/T and vehicle speed sensor MTR AT- 11 8,
AT- 1 3 9
8. A/T fluid level and state AT- 5 3
9. Control valve with TCMAT- 2 3 9
OFF vehicle 10. Direct clutch AT- 3 3 2

TROUBLE DIAGNOSIS AT-65
D E
F
G H
I
J
K L
M A
B
AT
Revision: 2006 December 2006 FX35/FX45
3 Shift
Shock Shock is too large
when changing D2 →
D
3 or M2 → M3 . ON vehicle 1. Accelerator pedal position sensor
AT-131
2. Control linkage adjustmentAT-231
3. ATF pressure switch 6, high and low reverse clutch sole-
noid valve AT-177,
AT-158
4. CAN communication line AT-104
5. Engine speed signalAT-123
6. Turbine revolution sensor AT- 11 6
7. Vehicle speed sensor A/T and vehicle speed sensor MTR AT- 11 8,
AT-139
8. A/T fluid level and state AT- 5 3
9. Control valve with TCMAT-239
OFF vehicle 10. High and low reverse clutch AT-329
4 Shock is too large
when changing D3 →
D
4 or M3 → M4 . ON vehicle 1. Accelerator pedal position sensor
AT-131
2. Control linkage adjustmentAT-231
3. ATF pressure switch 3 and input clutch solenoid valve AT-173,
AT-146
4. CAN communication line AT-104
5. Engine speed signalAT-123
6. Turbine revolution sensor AT- 11 6
7. Vehicle speed sensor A/T and vehicle speed sensor MTR AT- 11 8,
AT-139
8. A/T fluid level and state AT- 5 3
9. Control valve with TCMAT-239
OFF vehicle 10. Input clutch AT-317
5 Shock is too large
when changing D4 →
D
5 or M4 → M5 . ON vehicle 1. Accelerator pedal position sensor
AT-131
2. Control linkage adjustmentAT-231
3. ATF pressure switch 1 and front brake solenoid valve AT-171,
AT-150

4. CAN communication line AT-104
5. Engine speed signalAT-123
6. Turbine revolution sensor AT- 11 6
7. Vehicle speed sensor A/T and vehicle speed sensor MTR AT- 11 8,
AT-139
8. A/T fluid level and state AT- 5 3
9. Control valve with TCMAT-239
OFF vehicle 10. Front brake (brake band)
AT-27411. Input clutchAT-317
No. Items Symptom Condition Diagnostic Item Reference
page

AT-66
TROUBLE DIAGNOSIS
Revision: 2006 December 2006 FX35/FX45
6 Shift
Shock Shock is too large for
downshift when accel-
erator pedal is
pressed. ON vehicle 1. Accelerator pedal position sensor
AT- 1 3 1
2. Control linkage adjustmentAT- 2 3 1
3. CAN communication lineAT- 1 0 4
4. Engine speed signalAT- 1 2 3
5. Turbine revolution sensor AT- 11 6
6. Vehicle speed sensor A/T and vehicle speed sensor MTR AT- 11 8,
AT- 1 3 9
7. A/T fluid level and state AT- 5 3
8. Control valve with TCMAT- 2 3 9
OFF vehicle 9. Front brake (brake band)
AT- 2 7 410. Input clutch AT- 3 1 7
11. High and low reverse clutchAT- 3 2 9
12. Direct clutchAT- 3 3 2
7 Shock is too large for
upshift when acceler-
ator pedal is released. ON vehicle 1. Accelerator pedal position sensor
AT- 1 3 1
2. Control linkage adjustmentAT- 2 3 1
3. Engine speed signalAT- 1 2 3
4. CAN communication lineAT- 1 0 4
5. Turbine revolution sensor AT- 11 6
6. Vehicle speed sensor A/T and vehicle speed sensor MTR AT- 11 8,
AT- 1 3 9
7. A/T fluid level and state AT- 5 3
8. Control valve with TCMAT- 2 3 9
OFF vehicle 9. Front brake (brake band)
AT- 2 7 410. Input clutch AT- 3 1 7
11. High and low reverse clutch AT- 3 2 9
12. Direct clutch AT- 3 3 2
8 Shock is too large for
lock-up. ON vehicle 1. Accelerator pedal position sensor
AT- 1 3 1
2. Control linkage adjustmentAT- 2 3 1
3. Engine speed signalAT- 1 2 3
4. CAN communication lineAT- 1 0 4
5. Turbine revolution sensor AT- 11 6
6. Vehicle speed sensor A/T and vehicle speed sensor MTR AT- 11 8,
AT- 1 3 9
7. Torque converter clutch solenoid valve AT- 1 2 5
8. A/T fluid level and state AT- 5 3
9. Control valve with TCMAT- 2 3 9
OFF vehicle 10. Torque converter AT- 2 9 4
No. Items Symptom Condition Diagnostic Item Reference
page

TROUBLE DIAGNOSIS AT-67
D E
F
G H
I
J
K L
M A
B
AT
Revision: 2006 December 2006 FX35/FX459 Shift
Shock Shock is too large
during engine brake. ON vehicle
1. Accelerator pedal position sensor
AT-131
2. Control linkage adjustmentAT-231
3. CAN communication lineAT-104
4. A/T fluid level and state AT- 5 3
5. Control valve with TCMAT-239
OFF vehicle 6. Front brake (brake band)
AT-2747. Input clutch AT-317
8. High and low reverse clutchAT-329
9. Direct clutch AT-332
10
No Up
Shift Gear does not change
from D
1 → D2 or from
M
1 → M2 .
Refer to AT-204, "
A/T
Does Not Shift: D1 →
D2" . ON vehicle 1. A/T fluid level and state
AT- 5 3
2. Vehicle speed sensor A/T and vehicle speed sensor MTR AT- 11 8,
AT-139
3. ATF pressure switch 5 and direct clutch solenoid valve AT-175,
AT-154
4. Line pressure test AT- 5 4
5. CAN communication lineAT-104
6. Control valve with TCMAT-239
OFF vehicle 7. Direct clutch AT-332
11 Gear does not change
from D
2 → D3 or from
M
2 → M3 .
Refer to AT-206, "
A/T
Does Not Shift: D2 →
D3" . ON vehicle 1. A/T fluid level and state
AT- 5 3
2. Vehicle speed sensor A/T and vehicle speed sensor MTR AT- 11 8,
AT-139
3. ATF pressure switch 6, high and low reverse clutch sole-
noid valve AT-177,
AT-158
4. Line pressure test AT- 5 4
5. CAN communication lineAT-104
6. Control valve with TCMAT-239
OFF vehicle 7. High and low reverse clutch AT-329
12 Gear does not change
from D
3 → D4 or from
M
3 → M4 .
Refer to AT-208, "
A/T
Does Not Shift: D3 →
D4" . ON vehicle 1. A/T fluid level and state
AT- 5 3
2. Vehicle speed sensor A/T and vehicle speed sensor MTR AT- 11 8,
AT-139
3. ATF pressure switch 3 and input clutch solenoid valve AT-173,
AT-146
4. ATF pressure switch 1 and front brake solenoid valve AT-171,
AT-150
5. Line pressure test AT- 5 4
6. CAN communication lineAT-104
7. Control valve with TCMAT-239
OFF vehicle 8. Input clutch AT-317
No. Items Symptom Condition Diagnostic Item Reference
page

AT-68
TROUBLE DIAGNOSIS
Revision: 2006 December 2006 FX35/FX45
13 No Up
Shift Gear does not change
from D
4 → D5 or from
M
4 → M5 .
Refer to AT- 2 11 , "
A/T
Does Not Shift: D4 →
D5" . ON vehicle 1. A/T fluid level and state
AT- 5 3
2. Vehicle speed sensor A/T and vehicle speed sensor MTR AT- 11 8,
AT- 1 3 9
3. ATF pressure switch 1 and front brake solenoid valve AT- 1 7 1,
AT- 1 5 0
4. ATF pressure switch 5 and direct clutch solenoid valve AT- 1 7 5,
AT- 1 5 4
5. Turbine revolution sensor AT- 11 6
6. Line pressure test AT- 5 4
7. CAN communication lineAT- 1 0 4
8. Control valve with TCMAT- 2 3 9
OFF vehicle 9. Front brake (brake band)
AT- 2 9 410. Input clutchAT- 3 1 7
14
No Down
Shift In “D” or “M” position,
does not downshift to
4th gear. ON vehicle 1. A/T fluid level and state
AT- 5 3
2. Vehicle speed sensor A/T and vehicle speed sensor MTR AT- 11 8,
AT- 1 3 9

3. ATF pressure switch 1 and front brake solenoid valve AT- 1 7 1
,
AT- 1 5 0
4. ATF pressure switch 5 and direct clutch solenoid valve AT- 1 7 5,
AT- 1 5 4
5. CAN communication line AT- 1 0 4
6. Line pressure test AT- 5 4
7. Control valve with TCMAT- 2 3 9
OFF vehicle 8. Front brake (brake band)
AT- 2 9 49. Input clutchAT- 3 1 7
15 In “D” or “M” position,
does not downshift to
3rd gear. ON vehicle 1. A/T fluid level and state
AT- 5 3
2. Vehicle speed sensor A/T and vehicle speed sensor MTR AT- 11 8,
AT- 1 3 9
3. ATF pressure switch 3 and input clutch solenoid valve AT- 1 7 3,
AT- 1 4 6
4. ATF pressure switch 1 and front brake solenoid valve AT- 1 7 1,
AT- 1 5 0
5. CAN communication line AT- 1 0 4
6. Line pressure test AT- 5 4
7. Control valve with TCMAT- 2 3 9
OFF vehicle 8. Input clutch AT- 3 1 7
No. Items Symptom Condition Diagnostic Item Reference
page

TROUBLE DIAGNOSIS AT-69
D E
F
G H
I
J
K L
M A
B
AT
Revision: 2006 December 2006 FX35/FX4516 No Down
Shift In “D” or “M” position,
does not downshift to
2nd gear. ON vehicle 1. A/T fluid level and state
AT- 5 3
2. Vehicle speed sensor A/T and vehicle speed sensor MTR AT- 11 8,
AT-139

3. ATF pressure switch 6, high and low reverse clutch sole-
noid valve AT-177
,
AT-158
4. CAN communication line AT-104
5. Line pressure test AT- 5 4
6. Control valve with TCMAT-239
OFF vehicle 7. High and low reverse clutch AT-329
17 In “D” or “M” position,
does not downshift to
1st gear. ON vehicle 1. A/T fluid level and state
AT- 5 3
2. Vehicle speed sensor A/T and vehicle speed sensor MTR AT- 11 8,
AT-139
3. ATF pressure switch 5 and direct clutch solenoid valve AT-175,
AT-154
4. CAN communication line AT-104
5. Line pressure test AT- 5 4
6. Control valve with TCMAT-239
OFF vehicle 7. Direct clutch AT-332
18 Slips/Will
Not
Engage When “D” or “M” posi-
tion, remains in 1st
gear. ON vehicle
1. A/T fluid level and state
AT- 5 3
2. Vehicle speed sensor A/T and vehicle speed sensor MTR AT- 11 8,
AT-139
3. Direct clutch solenoid valve AT-154
4. Line pressure test AT- 5 4
5. CAN communication lineAT-104
6. Control valve with TCMAT-239
OFF vehicle 7. 3rd one-way clutch
AT-315
8. 1st one-way clutchAT-323
9. Gear systemAT-274
10. Reverse brakeAT-294
11. Forward one-way clutch (Parts behind drum support is
impossible to perform inspection by disassembly. Refer to
AT- 1 8 , "
Cross-sectional View (2WD Models)" , AT-19,
"Cross-sectional View (VQ35DE Models for AWD)" or AT-
20, "Cross-sectional View (VK45DE Models for AWD)" ) AT-294
12. Forward brake (Parts behind drum support is impossible
to perform inspection by disassembly. Refer to AT-18,
"Cross-sectional View (2WD Models)" , AT- 1 9 , "Cross-sec-
tional View (VQ35DE Models for AWD)" or AT-20, "Cross-
sectional View (VK45DE Models for AWD)" ) AT-294
No. Items Symptom Condition Diagnostic Item
Reference
page

AT-70
TROUBLE DIAGNOSIS
Revision: 2006 December 2006 FX35/FX45
19 Slips/Will
Not
Engage When “D” or “M” posi-
tion, remains in 2nd
gear. ON vehicle
1. A/T fluid level and state
AT- 5 3
2. Vehicle speed sensor A/T and vehicle speed sensor MTR AT- 11 8,
AT- 1 3 9
3. Low coast brake solenoid valve AT- 1 6 2
4. Line pressure test AT- 5 4
5. CAN communication lineAT- 1 0 4
6. Control valve with TCMAT- 2 3 9
OFF vehicle 7. 3rd one-way clutch
AT- 3 1 5
8. Gear systemAT- 2 7 4
9. Direct clutchAT- 3 3 2
10. Forward brake (Parts behind drum support is impossible
to perform inspection by disassembly. Refer to AT-18,
"Cross-sectional View (2WD Models)" , AT-19, "Cross-sec-
tional View (VQ35DE Models for AWD)" or AT- 2 0 , "Cross-
sectional View (VK45DE Models for AWD)" ) AT- 2 9 4
20
When “D” or “M” posi-
tion, remains in 3rd
gear. ON vehicle
1. A/T fluid level and state
AT- 5 3
2. Vehicle speed sensor A/T and vehicle speed sensor MTR AT- 11 8,
AT- 1 3 9
3. Line pressure test AT- 5 4
4. CAN communication lineAT- 1 0 4
5. Control valve with TCMAT- 2 3 9
OFF vehicle 6. 3rd one-way clutch
AT- 3 1 5
7. Gear systemAT- 2 7 4
8. High and low reverse clutchAT- 3 2 9
9. Forward one-way clutch (Parts behind drum support is
impossible to perform inspection by disassembly. Refer to
AT-18, "
Cross-sectional View (2WD Models)" , AT- 1 9 ,
"Cross-sectional View (VQ35DE Models for AWD)" or AT-
20, "Cross-sectional View (VK45DE Models for AWD)" ) AT- 2 9 4
10. Forward brake (Parts behind drum support is impossible
to perform inspection by disassembly. Refer to AT-18,
"Cross-sectional View (2WD Models)" , AT-19, "Cross-sec-
tional View (VQ35DE Models for AWD)" or AT- 2 0 , "Cross-
sectional View (VK45DE Models for AWD)" ) AT- 2 9 4
No. Items Symptom Condition Diagnostic Item
Reference
page

TROUBLE DIAGNOSIS AT-71
D E
F
G H
I
J
K L
M A
B
AT
Revision: 2006 December 2006 FX35/FX45
21 Slips/Will
Not
Engage When “D” or “M” posi-
tion, remains in 4th
gear. ON vehicle 1. A/T fluid level and state
AT- 5 3
2. Vehicle speed sensor A/T and vehicle speed sensor MTR AT- 11 8,
AT-139
3. ATF pressure switch 3 and input clutch solenoid valve AT-173,
AT-146
4. ATF pressure switch 5 and direct clutch solenoid valve AT-175,
AT-154
5. ATF pressure switch 6, high and low reverse clutch sole-
noid valve AT-177,
AT-158
6. Low coast brake solenoid valve AT-162
7. Front brake solenoid valveAT-150
8. Line pressure test AT- 5 4
9. CAN communication lineAT-104
10. Control valve with TCMAT-239
OFF vehicle 11. Input clutch
AT-31712. Gear systemAT-274
13. High and low reverse clutchAT-329
14. Direct clutchAT-332
22 When “D” or “M” posi-
tion, remains in 5th
gear. ON vehicle 1. A/T fluid level and state
AT- 5 3
2. Vehicle speed sensor A/T and vehicle speed sensor MTR AT- 11 8,
AT-139

3. ATF pressure switch 1 and front brake solenoid valve AT-171
,
AT-150
4. Line pressure test AT- 5 4
5. CAN communication lineAT-104
6. Control valve with TCMAT-239
OFF vehicle 7. Front brake (brake band)
AT-2948. Input clutchAT-317
9. Gear systemAT-274
10. High and low reverse clutchAT-329
No. Items Symptom Condition Diagnostic Item Reference
page

AT-72
TROUBLE DIAGNOSIS
Revision: 2006 December 2006 FX35/FX45
23 Slips/Will
Not
Engage Vehicle cannot be
started from D
1 .
Refer to AT-201,
"Vehicle Cannot Be
Started From D1" . ON vehicle
1. A/T fluid level and state
AT- 5 3
2. Accelerator pedal position sensorAT- 1 3 1
3. Line pressure test AT- 5 4
4. CAN communication lineAT- 1 0 4
5. Control valve with TCMAT- 2 3 9
OFF vehicle 6. Torque converter
AT- 2 9 4
7. Oil pump assemblyAT- 3 1 2
8. 3rd one-way clutchAT- 3 1 5
9. 1st one-way clutch AT- 3 2 3
10. Gear systemAT- 2 7 4
11. Reverse brakeAT- 2 9 4
12. Forward one-way clutch (Parts behind drum support is
impossible to perform inspection by disassembly. Refer to
AT-18, "
Cross-sectional View (2WD Models)" , AT- 1 9 ,
"Cross-sectional View (VQ35DE Models for AWD)" or AT-
20, "Cross-sectional View (VK45DE Models for AWD)" ) AT- 2 9 4
13. Forward brake (Parts behind drum support is impossible
to perform inspection by disassembly. Refer to AT-18,
"Cross-sectional View (2WD Models)" , AT-19, "Cross-sec-
tional View (VQ35DE Models for AWD)" or AT- 2 0 , "Cross-
sectional View (VK45DE Models for AWD)" ) AT- 2 9 4
24
Does not lock-up.
Refer to AT-213, "A/T
Does Not Lock-up" . ON vehicle 1. A/T fluid level and state
AT- 5 3
2. Line pressure testAT- 5 4
3. Engine speed signalAT- 1 2 3
4. Turbine revolution sensor AT- 11 6
5. Torque converter clutch solenoid valveAT- 1 2 5
6. CAN communication lineAT- 1 0 4
7. Control valve with TCMAT- 2 3 9
OFF vehicle 8. Torque converter
AT- 2 9 49. Oil pump assemblyAT- 3 1 2
25 Does not hold lock-up
condition.
Refer to AT-215, "A/T
Does Not Hold Lock-
up Condition" . ON vehicle 1. A/T fluid level and state
AT- 5 3
2. Line pressure testAT- 5 4
3. Engine speed signalAT- 1 2 3
4. Turbine revolution sensor AT- 11 6
5. Torque converter clutch solenoid valveAT- 1 2 5
6. CAN communication lineAT- 1 0 4
7. Control valve with TCMAT- 2 3 9
OFF vehicle 8. Torque converter
AT- 2 9 49. Oil pump assemblyAT- 3 1 2
No. Items Symptom Condition Diagnostic Item Reference
page