2008 INFINITI FX35 brake fluid

A/T CONTROL SYSTEMAT-31
< SERVICE INFORMATION >
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Input/Output Signal of TCMINFOID:0000000001327137
*1: Spare for vehicle speed sensor·A/T (revolution sensor)
*2: Spare for accelerator pedal position signal
*3: If these input and output signals are different, the TCM triggers the fail-safe function.
*4: Used as a condition for starting self-diagnostics; if self-diagnostics are not started, it is judged that there is some kin d of error.
*5: Input by CAN communications
*6: Output by CAN communications
Line Pressure ControlINFOID:0000000001327138
 When an input torque signal equivalent to the engine drive force is sent from the ECM to the TCM, the TCM
controls the line pressure solenoid.
Control item Line
pressure control Vehicle
speed
control Shift
control Lock-up
control Engine
brake
control Fail-safe
function (*3) Self-diag-
nostics
function
Input Accelerator pedal position signal
(*5)XXXXXXX
Vehicle speed sensor A/T
(revolution sensor) XXXXXXX
Vehicle speed sensor MTR
(*1) (*5)X
Closed throttle position signal
(*5)X (*2) X X X X (*4)
Wide open throttle position signal
(*5)XX (*4)
Turbine revolution sensor 1 X X X X X
Turbine revolution sensor 2
(for 4th speed only) XXXXX
Engine speed signals
(*5)XXXXXXX
Stop lamp switch signal
(*5)XXX X (*4)
A/T fluid temperature sensors 1, 2 X X X X X X
ASCD or
ICC Operation signal
(*5)XXX
Overdrive cancel sig-
nal
(*5)X
Out-
put Direct clutch solenoid X X X X
Input clutch solenoid X X X X
High and low reverse clutch sole-
noid
XX XX
Front brake solenoid X X X X
Low coast brake solenoid (ATF
pressure switch 2) XX XXX
Line pressure solenoid X X X X X X X
TCC solenoid X X X
Self-diagnostics table
(*6)X
Starter relay XX
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A/T CONTROL SYSTEMAT-33
< SERVICE INFORMATION >
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The necessary and adequate line pressure for shift change is set.
For this reason, line pressure pattern setting corresponds to input
torque and gearshift selection. Also, line pressure characteristic is
set according to engine speed, during engine brake operation.
At Low Fluid Temperature
When the A/T fluid temperature drops below the prescribed tempera-
ture, in order to speed up the action of each friction element, the line
pressure is set higher than the normal line pressure characteristic.
Shift ControlINFOID:0000000001327139
The clutch pressure control solenoid is controlled by the signals from the switches and sensors. Thus, the
clutch pressure is adjusted to be appropriate to t he engine load state and vehicle driving state. It becomes
possible to finely control the clutch hydraulic pressu re with high precision and a smoother shift change charac-
teristic is attained.
SHIFT CHANGE
The clutch is controlled with the optimum timing and oil pressure by the engine speed, engine torque informa-
tion, etc.
Shift Change System Diagram
PCIA0010E
PCIA0011E
PCIA0012E
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TROUBLE DIAGNOSISAT-45
< SERVICE INFORMATION >
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Diagnostic Worksheet Chart
Customer name MR/MS Model and Year VIN
Trans. Model Engine Mileage
Malfunction Date Manuf. Date In Service Date
Frequency
❏ Continuous ❏ Intermittent ( times a day)
Symptoms ❏ Vehicle does not move. ( ❏ Any position ❏ Particular position)
❏ No up-shift ( ❏ 1st → 2nd ❏ 2nd → 3rd ❏ 3rd → 4th ❏ 4th → 5th)
❏ No down-shift ( ❏ 5th → 4th ❏ 4th → 3rd ❏ 3rd → 2nd ❏ 2nd → 1st)
❏ Lock-up malfunction
❏ Shift point too high or too low.
❏ Shift shock or slip ( ❏ N → D ❏ Lock-up ❏ Any drive position)
❏ Noise or vibration
❏ No kick down
❏ No pattern select
❏ Others
()
A/T CHECK indicator lamp ❏ Continuously lit ❏ Not lit
Malfunction indicator lamp (MIL) ❏ Continuously lit ❏ Not lit
1 ❏ Read the item on cautions concerning fail-safe and understand the customer's complaint. AT- 4 1
2❏
A/T fluid inspection AT- 4 9❏ Leak (Repair leak location.)
❏ State
❏ Amount
3 ❏
Stall test and line pressure test AT- 4 9
❏ Stall test
❏ Torque converter one-way clutch
❏ Front brake
❏ High and low reverse clutch
❏ Low coast brake
❏ Forward brake
❏ Reverse brake
❏ Forward one-way clutch ❏
1st one-way clutch
❏ 3rd one-way clutch
❏ Engine
❏ Line pressure low
❏ Except for input clutch and direct
clutch, clutches and brakes OK
❏ Line pressure inspection - Suspected part:
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AT-46
< SERVICE INFORMATION >
TROUBLE DIAGNOSIS
4❏
Perform all road tests and enter checks in required inspection items. AT- 4 9
4-1.Check before engine is started
AT- 5 3
❏ The A/T CHECK Indicator Lamp does come on. AT- 1 7 0.
❏ Perform self-diagnostics. Enter checks for detected items. AT- 8 4
, AT- 9 1.
❏ DTC U1000 CAN COMMUNICATION LINE AT- 9 4
.
❏ DTC P0615 START SIGNAL CIRCUIT AT- 9 7
.
❏ DTC P0700 TCM AT- 1 0 1
❏ DTC P0705 PARK/NEUTRAL POSITION SWITCH AT- 1 0 2.
❏ DTC P0717 TURBINE REVOLUTION SENSOR AT- 1 0 6
.
❏ DTC P0720 VEHICLE SPEED SENSO R A/T (REVOLUTION SENSOR) AT- 1 0 8
.
❏ DTC P0725 ENGINE SPEED SIGNAL AT- 11 2
.
❏ DTC P0731 A/T 1ST GEAR FUNCTION AT- 11 4
.
❏ DTC P0732 A/T 2ND GEAR FUNCTION AT- 11 6
.
❏ DTC P0733 A/T 3RD GEAR FUNCTION AT- 11 8
.
❏ DTC P0734 A/T 4TH GEAR FUNCTION AT- 1 2 0
.
❏ DTC P0735 A/T 5TH GEAR FUNCTION AT- 1 2 2
.
❏ DTC P0740 TORQUE CONVERTER CLUTCH SOLENOID VALVE AT- 1 2 4
.
❏ DTC P0744 A/T TCC S/V FUNCTION (LOCK-UP) AT- 1 2 6
.
❏ DTC P0745 LINE PRESSURE SOLONOID VALVE AT- 1 2 8
.
❏ DTC P1705 THROTTLE POSITION SENSOR AT- 1 3 0
.
❏ DTC P1710 A/T FLUID TEMPERATURE SENSOR CIRCUIT AT- 1 3 2
.
❏ DTC P1721 VEHICLE SPEED SENSOR MTR AT- 1 3 7
.
❏ DTC P1730 A/T INTERLOCK AT- 1 3 9
.
❏ DTC P1731 A/T 1ST ENGINE BRAKING AT- 1 4 1
.
❏ DTC P1752 INPUT CLUTCH SOLENOID VALVE AT- 1 4 3
.
❏ DTC P1757 FRONT BRAKE SOLENOID VALVE AT- 1 4 5
.
❏ DTC P1762 DIRECT CLUTCH SOLENOID VALVE AT- 1 4 7
.
❏ DTC P1767 HIGH AND LOW REVERSE CLUTCH SOLENOID VALVE AT- 1 4 9
.
❏ DTC P1772 LOW COAST BRAKE SOLENOID VALVE AT- 1 5 1
.
❏ DTC P1774 LOW COAST BRAKE SOLENOID VALVE FUNCTION AT- 1 5 3
.
❏ DTC P1815 MANUAL MODE SWITCH AT- 1 5 5
.
4-2. Check at Idle
AT- 5 3
❏ AT- 1 7 0 , "Engine Cannot Be Started in "P" or "N" Position".
❏ AT- 1 7 1 , "
In "P" Position, Vehicle Moves When Pushed"
❏ AT- 1 7 2 , "In "N" Position, Vehicle Moves".
❏ AT- 1 7 3 , "
Large Shock ("N" to "D" Position)".
❏ AT- 1 7 5 , "
Vehicle Does Not Creep Backward in "R" Position".
❏ AT- 1 7 8 , "
Vehicle Does Not Creep Forward in "D" Position".
4-3. Cruise Test
AT- 5 3
Part 1
❏ AT- 1 8 0 , "
Vehicle Cannot Be Started from D1".
❏ AT- 1 8 2 , "
A/T Does Not Shift: D1→ D2".
❏ AT- 1 8 4 , "
A/T Does Not Shift: D2→ D3".
❏ AT- 1 8 6 , "
A/T Does Not Shift: D3→ D4".
❏ AT- 1 8 8 , "
A/T Does Not Shift: D4→ D5".
❏ AT- 1 9 0 , "
A/T Does Not Lock-up"
❏ AT- 1 9 2 , "A/T Does Not Hold Lock-up Condition".
❏ AT- 1 9 4 , "
Lock-up Is Not Released".
❏ AT- 1 9 4 , "
Engine Speed Does Not Return to Idle".
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TROUBLE DIAGNOSISAT-47
< SERVICE INFORMATION >
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44-3. Part 2
AT- 5 3
❏ AT- 1 8 0 , "Vehicle Cannot Be Started from D1".
❏ AT- 1 8 2 , "
A/T Does Not Shift: D1→ D2".
❏ AT- 1 8 4 , "
A/T Does Not Shift: D2→ D3".
❏ AT- 1 8 6 , "
A/T Does Not Shift: D3→ D4".
Part 3 AT- 5 3
❏ AT- 1 9 5 , "Cannot Be Changed to Manual Mode".
❏ AT- 1 9 6 , "
A/T Does Not Shift: 5th Gear → 4th Gear".
❏ AT- 1 9 7 , "
A/T Does Not Shift: 4th Gear → 3rd Gear".
❏ AT- 1 9 9 , "
A/T Does Not Shift: 3rd Gear → 2nd Gear".
❏ AT- 2 0 1 , "
A/T Does Not Shift: 2nd Gear → 1st Gear".
❏ AT- 2 0 2 , "
Vehicle Does Not Decelerate by Engine Brake".
❏ Perform self-diagnostics. Enter checks for detected items. AT- 8 4
, AT- 9 1.
❏ DTC U1000 CAN CO MMUNICATION LINE AT- 9 4
.
❏ DTC P0615 START SIGNAL CIRCUIT AT- 9 7
.
❏ DTC P0700 TCM AT- 1 0 1
❏ DTC P0705 PARK/NEUTRAL POSITION SWITCH AT- 1 0 2.
❏ DTC P0717 TURBINE REVOLUTION SENSOR AT- 1 0 6
.
❏ DTC P0720 VEHICLE SPEED SENS OR A/T (REVOLUTION SENSOR) AT- 1 0 8
.
❏ DTC P0725 ENGINE SPEED SIGNAL AT- 11 2
.
❏ DTC P0731 A/T 1ST GEAR FUNCTION AT- 11 4
.
❏ DTC P0732 A/T 2ND GEAR FUNCTION AT- 11 6
.
❏ DTC P0733 A/T 3RD GEAR FUNCTION AT- 11 8
.
❏ DTC P0734 A/T 4TH GEAR FUNCTION AT- 1 2 0
.
❏ DTC P0735 A/T 5TH GEAR FUNCTION AT- 1 2 2
.
❏ DTC P0740 TORQUE CONVERTER CLUTCH SOLENOID VALVE AT- 1 2 4
.
❏ DTC P0744 A/T TCC S/V FUNCTION (LOCK-UP) AT-126
.
❏ DTC P0745 LINE PRESSURE SOLONOID VALVE AT- 1 2 8
.
❏ DTC P1705 THROTTLE POSITION SENSOR AT- 1 3 0
.
❏ DTC P1710 A/T FLUID TEMPERATURE SENSOR CIRCUIT AT- 1 3 2
.
❏ DTC P1721 VEHICLE SPEED SENSOR MTR AT- 1 3 7
.
❏ DTC P1730 A/T INTERLOCK AT- 1 3 9
.
❏ DTC P1731 A/T 1ST ENGINE BRAKING AT- 1 4 1
.
❏ DTC P1752 INPUT CLUTCH SOLENOID VALVE AT- 1 4 3
.
❏ DTC P1757 FRONT BRAKE SOLENOID VALVE AT- 1 4 5
.
❏ DTC P1762 DIRECT CLUTCH SOLENOID VALVE AT- 1 4 7
.
❏ DTC P1767 HIGH AND LOW REVERSE CLUTCH SOLENOID VALVE AT- 1 4 9
.
❏ DTC P1772 LOW COAST BRAKE SOLENOID VALVE AT- 1 5 1
.
❏ DTC P1774 LOW COAST BRAKE SOLENOID VALVE FUNCTION AT- 1 5 3
.
❏ DTC P1815 MANUAL MODE SWITCH AT-155
.
5 ❏ Inspect each system for items found to be NG in the self-diagnostics and repair or replace the malfunctioning parts.
6 ❏ Perform all road tests and enter the checks again for the required items. AT- 4 9
7❏
For any remaining NG items, perform the “diagnostics procedure” and repair or replace the malfunctioning
parts. See the chart for diagnostics by symptoms. (This chart also contains other symptoms and inspection pro-
cedures.) AT- 5 9
8
❏ Erase the results of the self-diagnostics from the TCM and the ECM. AT- 8 4,
AT-
91
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AT-50
< SERVICE INFORMATION >
TROUBLE DIAGNOSIS
A/T Fluid Condition Check
Inspect the A/T fluid condition.
STALL TEST
Stall Test Procedure
1. Inspect the amount of engine oil. Replenish the engine oil if necessary.
2. Drive for about 10 minutes to warm up the vehicle so that the A/T fluid temperature is 50 to 80 °C (122 to 176 °F). Check the
amount of ATF. Replenish if necessary.
3. Securely engage the parking brake so that the tires do not turn.
4. Start engine, apply foot brake, and place selector lever in “D” position.
5. While holding down the foot brake, gradually press down the accelerator pedal.
6. Quickly read off the stall speed, then quickly remove your foot from the accelerator pedal.
CAUTION:
Do not hold down the accelerator pedal for more than 5 sec-
onds during this test.
7. Move the selector lever to the “N” position.
8. Cool down the ATF. CAUTION:
Run the engine at idle for at least 1 minute.
Fluid condition Conceivable Cause Required Operation
Varnished (viscous
varnish state) Clutch, brake
scorchedReplace the ATF and check the A/T
main unit and the vehicle for mal-
functions (wire harnesses, cooler
pipes, etc.)
Milky white or
cloudy Water in the fluidReplace the ATF and check for plac-
es where water is getting in.
Large amount of
metal powder mixed
in Unusual wear of
sliding parts within
A/T
Replace the ATF and check for im-
proper operation of the A/T.
SAT638A
SAT647B
SCIA7463E
Stall speed
VQ35DE engine: 2,650 - 2,950 rpm
VK45DE engine: 2,260 - 2,560 rpm
SAT514G
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TROUBLE DIAGNOSISAT-51
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9. Repeat steps 5 through 8 with selector lever in “R” position.
Judgement of Stall Test
O: Stall speed within standard value position
H: Stall speed higher than standard value
L: Stall speed lower than standard value
Stall test standard value position
LINE PRESSURE TEST
Line Pressure Test Port
Line Pressure Test Procedure
1. Inspect the amount of engine oil and replenish if necessary.
2. Drive the car for about 10 minutes to warm it up so that the ATF reaches in range of 50 to 80°C (122 to
176 °F), then inspect the amount of ATF and replenish if necessary.
NOTE:
The A/T fluid temperature rises in range of 50 to 80°C (122 to 176 °F) during 10 minutes of driving.
3. Remove the front propeller shaft from vehicle (with AWD models). Refer to PR-4, "
Removal and Installa-
tion".
4. After warming up remove the oil pressure detection plug and install the oil pressure gauge [ST2505S001(J-34301-C)].
CAUTION:
When using the oil pressure ga uge, be sure to use the O-
ring attached to the oil pressure detection plug.
Selector lever position Expected problem location
“D”, “M” “R”
Stall speed HO
 Forward brake
 Forward one-way clutch
 1st one-way clutch
 3rd one-way clutch
O H  Reverse brake L L  Engine and torque converter one-way clutch
H H  Line pressure low
Does not shift-up “D ” or “M” position 1 → 2 Slipping in 2nd, 3rd or 4th gear Direct clutch slippage
Does not shift-up “D ” or “M” position 2 → 3 Slipping in 3rd, 4th or 5th gear High and low reverse clutch slippage
Does not shift-up “D ” or “M” position 3 → 4 Slipping in 4th or 5th gear Input clutch slippage
Does not shift-up “D ” or “M” position 4 → 5 Slipping in 5th gear Front brake slippage
SCIA2187E
SCIA5309E
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TROUBLE DIAGNOSISAT-59
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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
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