sensor INFINITI FX35 2008 Workshop Manual
[x] Cancel search | Manufacturer: INFINITI, Model Year: 2008, Model line: FX35, Model: INFINITI FX35 2008Pages: 3924, PDF Size: 81.37 MB
Page 125 of 3924

AT-52
< SERVICE INFORMATION >
TROUBLE DIAGNOSIS
5. Securely engage the parking brake so that the tires do not turn.
6. Start the engine, then measure the line pressure at both idle andthe stall speed.
CAUTION:
Keep the brake pedal pressed all the way down duringmeasurement.
When measuring the line pressure at the stall speed, refer to "STALL TEST".
7. After the measurements are complete, install the oil pressure detection plug and tighten to the specified torque.
CAUTION:
Do not reuse the O-ring.
Apply ATF to the O-ring.
Line Pressure
Judgement of Line Pressure Test
SCIA7463E
:7.3 N·m (0.74 kg-m, 65 in-lb)SAT493G
Engine speed Line pressure kPa (kg/cm
2, psi)
“R” position “D” and “M” positions
At idle speed 425 - 465 (4.3 - 4.7, 62 - 67) 379 - 428 (3.9 - 4.4, 55 - 62)
At stall speed 1,605 - 1,950 (16.4 - 19.9, 233 - 283) 1,310 - 1,500 (13.4 - 15.3, 190 - 218)
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
:
Page 126 of 3924

TROUBLE DIAGNOSISAT-53
< SERVICE INFORMATION >
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Road TestINFOID:0000000001425855
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.
2. Check at idle.
3. Cruise test
Inspect all the items Part 1 to Part 3.
Before beginning the road test, che ck the procedure and inspection items.
Test all inspection items until the symptom is uncov ered. Diagnose NG items when all road tests are com-
plete.
CHECK BEFORE ENGINE IS STARTED
1.CHECK A/T CHECK INDICATOR LAMP
1. Park vehicle on level surface.
2. Move selector lever to “P” position.
3. Turn ignition switch OFF and wait at least 10 seconds.
4. Turn ignition switch ON.
Does A/T CHECK indicator lamp light up for about 2 seconds?
YES - 1>> With CONSULT-III
1. Perform self-diagnostics and record all NG items on the “Diagnostic Worksheet Chart”.
2. Go to “CHECK AT IDLE”.
YES - 2>> Without CONSULT-III
1. Perform self-diagnostics and record all NG it ems on the “Diagnostic Worksheet Chart”. Refer
to AT-91, "
Diagnosis Procedure without CONSULT-III".
2. Go to “CHECK AT IDLE”.
NO >> Stop the road test and go to AT-170, "
A/T Check Indicator Lamp Does Not Come On".
CHECK AT IDLE
1.CHECK STARTING THE ENGINE
1. Park vehicle on level surface.
2. Move selector lever to “P” or “N” position.
3. Turn ignition switch OFF.
4. Start engine.
Does the engine start?
YES >> GO TO 2.
NO >> Stop the road test and go to AT-170, "
Engine Cannot Be Started in "P" or "N" Position".
Stall speedLine 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.
Judgement Possible cause
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Page 132 of 3924

TROUBLE DIAGNOSISAT-59
< SERVICE INFORMATION >
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At closed throttle, the accelerator opening is less than 1/8 condition. (Closed throttle position signal: OFF)
At half throttle, the accelerator opening is 4/8 of the full opening.
At closed throttle, the accelerator opening is less than 1/8 condition. (Closed throttle position signal: OFF)
At half throttle, the accelerator opening is 4/8 of the full opening.
Symptom ChartINFOID:0000000001327161
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-49, "
Inspections Before Trou-
ble Diagnosis".
Engine model VK45DE
Throttle positionVehicle speed km/h (MPH)
Lock-up ON Lock-up OFF
Closed throttle 66 - 74 (41 - 46) 53 - 61 (33 - 38)
Half throttle 191 - 199 (119 - 124) 145 - 153 (90 - 95)
No. Items Symptom Condition Diagnostic Item Reference
page
1 Shift
Shock Large shock. (“N”
→
“D” position)
Refer to AT- 1 7 3 ,
"Large Shock ("N" to
"D" Position)". ON vehicle 1. Engine idle speed
EC-84
(for
VQ35DE)
or EC-661
(for
VK45DE)
2. Engine speed signal AT- 11 2
3. Accelerator pedal position sensorAT- 1 3 0
4. A/T positionAT- 2 0 7
5. A/T fluid temperature sensorAT- 1 3 2
6. Front brake solenoid valveAT- 1 4 5
7. CAN communication line AT- 9 4
8. A/T fluid level and stateAT- 4 9
9. Line pressure testAT- 4 9
10. Control valve with TCMAT- 2 1 5
OFF vehicle11. Forward brake (Parts behind drum support is impossible
to perform inspection by disassembly. Refer to
AT- 1 6 , "
Cross-
Sectional View (2WD Models)", AT- 1 7 , "Cross-Sectional View
(VQ35DE Models for AWD)" or AT- 1 8 , "Cross-Sectional View
(VK45DE Models for AWD)") AT- 2 6 7
2
Shock is too large
when changing D1
→
D
2 or M1 → M2. ON vehicle 1. Accelerator pedal position sensor
AT- 1 3 0
2. A/T positionAT- 2 0 7
3. Direct clutch solenoid valveAT- 1 4 7
4. CAN communication line AT- 9 4
5. Engine speed signalAT- 11 2
6. Turbine revolution sensorAT- 1 0 6
7. Vehicle speed sensor A/T and vehicle speed sensor MTRAT- 1 0 8,
AT- 1 3 7
8. A/T fluid level and state AT- 4 9
9. Control valve with TCMAT- 2 1 5
OFF vehicle 10. Direct clutch AT- 3 0 3
3AA93ABC3ACD3AC03ACA3AC03AC63AC53A913A773A893A873A873A8E3A773A983AC73AC93AC03AC3
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Page 133 of 3924

AT-60
< SERVICE INFORMATION >
TROUBLE DIAGNOSIS
3Shift
Shock Shock is too large
when changing D2
→
D
3 or M2 → M3. ON vehicle 1. Accelerator pedal position sensor
AT- 1 3 0
2. A/T positionAT- 2 0 7
3.High and low reverse clutch solenoid valveAT- 1 4 9
4. CAN communication line AT- 9 4
5. Engine speed signalAT- 11 2
6. Turbine revolution sensorAT- 1 0 6
7. Vehicle speed sensor A/T and vehicle speed sensor MTRAT- 1 0 8,
AT- 1 3 7
8. A/T fluid level and state AT- 4 9
9. Control valve with TCMAT- 2 1 5
OFF vehicle 10. High and low reverse clutch AT- 3 0 1
4Shock is too large
when changing D3
→
D
4 or M3 → M4. ON vehicle 1. Accelerator pedal position sensor
AT- 1 3 0
2. A/T positionAT- 2 0 7
3. Input clutch solenoid valveAT- 1 4 3
4. CAN communication line AT- 9 4
5. Engine speed signalAT- 11 2
6. Turbine revolution sensorAT- 1 0 6
7. Vehicle speed sensor A/T and vehicle speed sensor MTRAT- 1 0 8,
AT- 1 3 7
8. A/T fluid level and state AT- 4 9
9. Control valve with TCMAT- 2 1 5
OFF vehicle 10. Input clutch AT- 2 8 9
5Shock is too large
when changing D4
→
D
5 or M4 → M5. ON vehicle1. Accelerator pedal position sensor
AT- 1 3 0
2. A/T positionAT- 2 0 7
3. Front brake solenoid valveAT- 1 4 5
4. CAN communication line AT- 9 4
5. Engine speed signalAT- 11 2
6. Turbine revolution sensorAT- 1 0 6
7. Vehicle speed sensor A/T and vehicle speed sensor MTRAT- 1 0 8,
AT- 1 3 7
8. A/T fluid level and state AT- 4 9
9. Control valve with TCMAT- 2 1 5
OFF vehicle10. Front brake (brake band)
AT- 2 4 911. Input clutchAT- 2 8 9
No. Items Symptom Condition Diagnostic Item Reference
page
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Page 134 of 3924

TROUBLE DIAGNOSISAT-61
< SERVICE INFORMATION >
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6
Shift
Shock Shock is too large for
downshift when accel-
erator pedal is
pressed.
ON vehicle1. Accelerator pedal position sensor
AT- 1 3 0
2. A/T positionAT- 2 0 7
3. CAN communication line AT- 9 4
4. Engine speed signalAT- 11 2
5. Turbine revolution sensorAT- 1 0 6
6. Vehicle speed sensor A/T and vehicle speed sensor MTRAT- 1 0 8,
AT- 1 3 7
7. A/T fluid level and state AT- 4 9
8. Control valve with TCMAT- 2 1 5
OFF vehicle9. Front brake (brake band)
AT- 2 4 910. Input clutch AT- 2 8 9
11. High and low reverse clutchAT- 3 0 1
12. Direct clutchAT- 3 0 3
7Shock is too large for
upshift when accelera-
tor pedal is released. ON vehicle1. Accelerator pedal position sensor
AT- 1 3 0
2. A/T positionAT- 2 0 7
3. Engine speed signal AT- 11 2
4. CAN communication line AT- 9 4
5. Turbine revolution sensorAT- 1 0 6
6. Vehicle speed sensor A/T and vehicle speed sensor MTRAT- 1 0 8,
AT- 1 3 7
7. A/T fluid level and state AT- 4 9
8. Control valve with TCMAT- 2 1 5
OFF vehicle9. Front brake (brake band)
AT- 2 4 910. Input clutch AT- 2 8 9
11. High and low reverse clutch AT- 3 0 1
12. Direct clutch AT- 3 0 3
8Shock is too large for
lock-up. ON vehicle1. Accelerator pedal position sensor
AT- 1 3 0
2. A/T positionAT- 2 0 7
3. Engine speed signal AT- 11 2
4. CAN communication line AT- 9 4
5. Turbine revolution sensorAT- 1 0 6
6. Vehicle speed sensor A/T and vehicle speed sensor MTRAT- 1 0 8,
AT- 1 3 7
7. Torque converter clutch solenoid valve AT- 1 2 4
8. A/T fluid level and state AT- 4 9
9. Control valve with TCMAT- 2 1 5
OFF vehicle 10. Torque converter AT- 2 6 7
No. Items Symptom Condition Diagnostic Item Reference
page
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Page 135 of 3924

AT-62
< SERVICE INFORMATION >
TROUBLE DIAGNOSIS
9Shift
Shock Shock is too large dur-
ing engine brake. ON vehicle
1. Accelerator pedal position sensor
AT- 1 3 0
2. A/T positionAT- 2 0 7
3. CAN communication line AT- 9 4
4. A/T fluid level and stateAT- 4 9
5. Control valve with TCMAT- 2 1 5
OFF vehicle6. Front brake (brake band)
AT- 2 4 97. Input clutch AT- 2 8 9
8. High and low reverse clutchAT- 3 0 1
9. Direct clutch AT- 3 0 3
10
No Up
Shift Gear does not change
from D
1 to D2 or from
M1to M2.
Refer to AT- 1 8 2 , "
A/T
Does Not Shift: D1→
D2". ON vehicle1. A/T fluid level and state
AT- 4 9
2. Vehicle speed sensor A/T and vehicle speed sensor MTRAT- 1 3 7
3. Direct clutch solenoid valveAT- 1 4 7
4. Line pressure test AT- 4 9
5. CAN communication lineAT- 9 4
6. Control valve with TCMAT- 2 1 5
OFF vehicle 7. Direct clutch AT- 3 0 3
11Gear does not change
from D
2 to D3 or from
M2 to M3.
Refer to AT- 1 8 4 , "
A/T
Does Not Shift: D2→
D3". ON vehicle1. A/T fluid level and state
AT- 4 9
2. Vehicle speed sensor A/T and vehicle speed sensor MTRAT- 1 0 8,
AT- 1 3 7
3. High and low reverse clutch solenoid valve AT- 1 4 9
4. Line pressure test AT- 4 9
5. CAN communication lineAT- 9 4
6. Control valve with TCMAT- 2 1 5
OFF vehicle 7. High and low reverse clutch AT- 3 0 1
12Gear does not change
from D
3 to D4 or from
M3 to M4.
Refer to AT- 1 8 6 , "
A/T
Does Not Shift: D3→
D4". ON vehicle1. A/T fluid level and state
AT- 4 9
2. Vehicle speed sensor A/T and vehicle speed sensor MTRAT- 1 0 8,
AT- 1 3 7
3. Input clutch solenoid valve AT- 1 4 3
4. Front brake solenoid valveAT- 1 4 5
5. Line pressure test AT- 4 9
6. CAN communication lineAT- 9 4
7. Control valve with TCMAT- 2 1 5
OFF vehicle 8. Input clutch AT- 2 8 9
13No Up
Shift Gear does not change
from D
4 to D5 or from
M4 to M5.
Refer to AT- 1 8 8 , "
A/T
Does Not Shift: D4→
D5". ON vehicle1. A/T fluid level and state
AT- 4 9
2. Vehicle speed sensor A/T and vehicle speed sensor MTRAT- 1 0 8,
AT- 1 3 7
3. Front brake solenoid valve AT- 1 4 5
4. Direct clutch solenoid valveAT- 1 4 7
5. Turbine revolution sensorAT- 1 0 6
6. Line pressure test AT- 4 9
7. CAN communication lineAT- 9 4
8. Control valve with TCMAT- 2 1 5
OFF vehicle9. Front brake (brake band)
AT- 2 6 710. Input clutchAT- 2 8 9
No. Items Symptom Condition Diagnostic Item Reference
page
3AA93ABC3ACD3AC03ACA3AC03AC63AC53A913A773A893A873A873A8E3A773A983AC73AC93AC03AC3
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TROUBLE DIAGNOSISAT-63
< SERVICE INFORMATION >
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No Down
Shift In “D” or “M” position,
does not downshift to
4th gear.
ON vehicle1. A/T fluid level and state
AT- 4 9
2. Vehicle speed sensor A/T and vehicle speed sensor MTRAT- 1 0 8,
AT- 1 3 7
3. Front brake solenoid valve AT- 1 4 5
4. Direct clutch solenoid valveAT- 1 4 7
5. CAN communication line AT- 9 4
6. Line pressure testAT- 4 9
7. Control valve with TCMAT- 2 1 5
OFF vehicle8. Front brake (brake band)
AT- 2 6 79. Input clutchAT- 2 8 9
15In “D” or “M” position,
does not downshift to
3rd gear. ON vehicle1. A/T fluid level and state
AT- 4 9
2. Vehicle speed sensor A/T and vehicle speed sensor MTRAT- 1 0 8,
AT- 1 3 7
3. Input clutch solenoid valve AT- 1 4 3
4. Front brake solenoid valveAT- 1 4 5
5. CAN communication line AT- 9 4
6. Line pressure testAT- 4 9
7. Control valve with TCMAT- 2 1 5
OFF vehicle 8. Input clutch AT- 2 8 9
16
No Down
Shift In “D” or “M” position,
does not downshift to
2nd gear.
ON vehicle1. A/T fluid level and state
AT- 4 9
2. Vehicle speed sensor A/T and vehicle speed sensor MTRAT- 1 0 8,
AT- 1 3 7
3. High and low reverse clutch solenoid valve AT- 1 4 9
4. CAN communication line AT- 9 4
5. Line pressure testAT- 4 9
6. Control valve with TCMAT- 2 1 5
OFF vehicle 7. High and low reverse clutch AT- 3 0 1
17In “D” or “M” position,
does not downshift to
1st gear. ON vehicle1. A/T fluid level and state
AT- 4 9
2. Vehicle speed sensor A/T and vehicle speed sensor MTRAT- 1 0 8,
AT- 1 3 7
3. Direct clutch solenoid valve AT- 1 4 7
4. CAN communication line AT- 9 4
5. Line pressure testAT- 4 9
6. Control valve with TCMAT- 2 1 5
OFF vehicle 7. Direct clutch AT- 3 0 3
No. Items Symptom Condition Diagnostic Item Reference
page
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Page 137 of 3924

AT-64
< SERVICE INFORMATION >
TROUBLE DIAGNOSIS
18Slips/Will
Not En-
gage When “D” or “M” posi-
tion, remains in 1st
gear. ON vehicle
1. A/T fluid level and state
AT- 4 9
2. Vehicle speed sensor A/T and vehicle speed sensor MTRAT- 1 0 8,
AT- 1 3 7
3. Direct clutch solenoid valve AT- 1 4 7
4. Line pressure test AT- 4 9
5. CAN communication lineAT- 9 4
6. Control valve with TCMAT- 2 1 5
OFF vehicle7. 3rd one-way clutch
AT- 2 8 7
8. 1st one-way clutchAT- 2 9 5
9. Gear systemAT- 2 4 9
10. Reverse brakeAT- 2 6 7
11. Forward one-way clutch (Parts behind drum support is im-
possible to perform inspection by disassembly. Refer to AT-
16, "Cross-Sectional View (2WD Models)", AT- 1 7 , "Cross-
Sectional View (VQ35DE Models for AWD)" or AT- 1 8 , "Cross-
Sectional View (VK45DE Models for AWD)") AT- 2 6 7
12. Forward brake (Parts behind drum support is impossible
to perform inspection by disassembly. Refer to
AT- 1 6 , "
Cross-
Sectional View (2WD Models)", AT- 1 7 , "Cross-Sectional View
(VQ35DE Models for AWD)" or AT- 1 8 , "Cross-Sectional View
(VK45DE Models for AWD)") AT- 2 6 7
No. Items Symptom Condition Diagnostic Item
Reference
page
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TROUBLE DIAGNOSISAT-65
< SERVICE INFORMATION >
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19
Slips/Will
Not En-
gage When “D” or “M” posi-
tion, remains in 2nd
gear.
ON vehicle
1. A/T fluid level and state
AT- 4 9
2. Vehicle speed sensor A/T and vehicle speed sensor MTRAT- 1 0 8,
AT- 1 3 7
3. Low coast brake solenoid valve AT- 1 5 1
4. Line pressure test AT- 4 9
5. CAN communication lineAT- 9 4
6. Control valve with TCMAT- 2 1 5
OFF vehicle7. 3rd one-way clutch
AT- 2 8 7
8. Gear systemAT- 2 4 9
9. Direct clutchAT- 3 0 3
10. Forward brake (Parts behind drum support is impossible
to perform inspection by disassembly. Refer to AT- 1 6 , "
Cross-
Sectional View (2WD Models)", AT- 1 7 , "Cross-Sectional View
(VQ35DE Models for AWD)" or AT- 1 8 , "Cross-Sectional View
(VK45DE Models for AWD)") AT- 2 6 7
20
When “D” or “M” posi-
tion, remains in 3rd
gear. ON vehicle
1. A/T fluid level and state
AT- 4 9
2. Vehicle speed sensor A/T and vehicle speed sensor MTRAT- 1 0 8,
AT- 1 3 7
3. Line pressure test AT- 4 9
4. CAN communication lineAT- 9 4
5. Control valve with TCMAT- 2 1 5
OFF vehicle6. 3rd one-way clutch
AT- 2 8 7
7. Gear systemAT- 2 4 9
8. High and low reverse clutchAT- 3 0 1
9. Forward one-way clutch (Parts behind drum support is im-
possible to perform inspection by disassembly. Refer to AT-
16, "Cross-Sectional View (2WD Models)", AT- 1 7 , "Cross-
Sectional View (VQ35DE Models for AWD)" or AT- 1 8 , "Cross-
Sectional View (VK45DE Models for AWD)") AT- 2 6 7
10. Forward brake (Parts behind drum support is impossible
to perform inspection by disassembly. Refer to
AT- 1 6 , "
Cross-
Sectional View (2WD Models)", AT- 1 7 , "Cross-Sectional View
(VQ35DE Models for AWD)" or AT- 1 8 , "Cross-Sectional View
(VK45DE Models for AWD)") AT- 2 6 7
No. Items Symptom Condition Diagnostic Item
Reference
page
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AT-66
< SERVICE INFORMATION >
TROUBLE DIAGNOSIS
21Slips/Will
Not En-
gage When “D” or “M” posi-
tion, remains in 4th
gear.
ON vehicle1. A/T fluid level and state
AT- 4 9
2. Vehicle speed sensor A/T and vehicle speed sensor MTRAT- 1 0 8,
AT- 1 3 7
3. Input clutch solenoid valve AT- 1 4 3
4. Direct clutch solenoid valveAT- 1 4 7
5. High and low reverse clutch solenoid valveAT- 1 4 9
6. Low coast brake solenoid valveAT- 1 5 1
7. Front brake solenoid valveAT- 1 4 5
8. Line pressure test AT- 4 9
9. CAN communication lineAT- 9 4
10. Control valve with TCMAT- 2 1 5
OFF vehicle11. Input clutch
AT- 2 8 912. Gear systemAT- 2 4 9
13. High and low reverse clutchAT- 3 0 1
14. Direct clutchAT- 3 0 3
22When “D” or “M” posi-
tion, remains in 5th
gear. ON vehicle1. A/T fluid level and state
AT- 4 9
2. Vehicle speed sensor A/T and vehicle speed sensor MTRAT- 1 0 8,
AT- 1 3 7
3. Front brake solenoid valve AT- 1 4 5
4. Line pressure test AT- 4 9
5. CAN communication lineAT- 9 4
6. Control valve with TCMAT- 2 1 5
OFF vehicle7. Front brake (brake band)
AT- 2 6 78. Input clutchAT- 2 8 9
9. Gear systemAT- 2 4 9
10. High and low reverse clutchAT- 3 0 1
No. Items Symptom Condition Diagnostic Item Reference
page
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