2004 INFINITI FX35 brake

TROUBLE DIAGNOSIS
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Revision: 2004 November 2004 FX35/FX45
A/T Interlock

If there is an A/T interlock judgment malfunction, the transmission is fixed in 2nd gear to make driving pos-
sible.
NOTE:
When the vehicle is driven fixed in 2nd gear a turbine revolution sensor malfunction is displayed,
but this is not a turbine revolution sensor malfunction.

When the coupling pattern below is detected, the fail-safe action corresponding to the pattern is executed.
A/T INTERLOCK COUPLING PATTERN TABLE

: NG X: OK
A/T 1st Engine Braking

When there is an A/T first gear engine brake judgment malfunction, the low coast brake solenoid is
switched “OFF” to avoid the engine brake operation.
Line Pressure Solenoid

The solenoid is switched “OFF” and the line pressure is set to the maximum hydraulic pressure to make
driving possible.
Torque Converter Clutch Solenoid

The solenoid is switched “OFF” to release the lock-up.
Low Coast Brake Solenoid

When a malfunction (electrical or functional) occurs, in order to make driving possible, if the solenoid is
“ON”, the transmission is held in 2nd gear; if the solenoid is “OFF”, the transmission is held in 4th gear.
(engine brake is not applied in 1st and 2nd gear.)
Input Clutch Solenoid

If a malfunction (electrical or functional) occurs with the solenoid either “ON” or “OFF”, the transmission is
held in 4th gear to make driving possible.
Direct Clutch Solenoid

If a malfunction (electrical or functional) occurs with the solenoid either “ON” or “OFF”, the transmission is
held in 4th gear to make driving possible.
Front Brake Solenoid

If a malfunction (electrical or functional) occurs with the solenoid “ON”, in order to make driving possible,
the A/T is held in 5th gear; if the solenoid is OFF, 4th gear.
High and Low Reverse Clutch Solenoid

If a malfunction (electrical or functional) occurs with the solenoid either “ON” or “OFF”, the transmission is
held in 4th gear to make driving possible.
Turbine Revolution Sensor 1 or 2

The control is the same as if there were no turbine revolution sensors, 5th gear and manual mode are pro-
hibited.
Gear positionATF pressure switch output
Fail-safe
functionClutch pressure output pattern after fail-safe func-
tion
SW3
(I/C)SW6
(HLR/
C)SW5
(D/C)SW1
(FR/B)SW2
(LC/B)I/C HLR/C D/C FR/B LC/B L/U
A/T inter-
lock cou-
pling pattern3rd – X X –
Held in
2nd gearOFF OFF ON OFF OFF OFF
4th – X X –
Held in
2nd gearOFF OFF ON OFF OFF OFF
5th X X – X
Held in
2nd gearOFF OFF ON OFF OFF OFF

AT-46
TROUBLE DIAGNOSIS
Revision: 2004 November 2004 FX35/FX45
DIAGNOSTIC WORKSHEET
Information From Customer
KEY POINTS

WHAT..... Vehicle and A/T model

WHEN..... Date, Frequencies

WHERE..... Road conditions

HOW..... Operating conditions, Symptoms
Diagnostic Worksheet Chart
Customer name MR/MS Model and Year VIN
Trans. Model Engine Mileage
Incident 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 Blinks for about 8 seconds.
❏ 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 2
2❏ A/T fluid inspection
AT- 5 1❏ Leak (Repair leak location.)
❏ State
❏ Amount
3❏ Stall test and line pressure test
AT- 5 1
,
AT- 5 2
❏ 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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Revision: 2004 November 2004 FX35/FX45
4❏ Execute all road tests and enter checks in required inspection items.AT- 5 4
4-1.Check before engine is started
AT- 5 5
❏ The A/T CHECK Indicator Lamp does come on. AT- 1 9 1 .
❏ Perform self-diagnostics. Enter checks for detected items. AT- 9 4
, AT-103
❏ AT-105, "DTC U1000 CAN COMMUNICATION LINE" .
❏ AT-108, "
DTC P0615 START SIGNAL CIRCUIT" .
❏ AT-112, "
DTC P0705 PARK/NEUTRAL POSITION SWITCH" .
❏ AT-116, "
DTC P0720 VEHICLE SPEED SENSOR A/T (REVOLUTION SENSOR)" .
❏ AT-121, "
DTC P0725 ENGINE SPEED SIGNAL" .
❏ AT-121, "
DTC P0725 ENGINE SPEED SIGNAL" .
❏ AT-123, "
DTC P0740 TORQUE CONVERTER CLUTCH SOLENOID VALVE" .
❏ AT-125, "
DTC P0744 A/T TCC S/V FUNCTION (LOCK-UP)" .
❏ AT-127, "
DTC P0745 LINE PRESSURE SOLENOID VALVE" .
❏ AT-129, "
DTC P1701 TRANSMISSION CONTROL MODULE (POWER SUPPLY)" .
❏ AT-133, "
DTC P1702 TRANSMISSION CONTROL MODULE (RAM)" .
❏ AT-134, "
DTC P1703 TRANSMISSION CONTROL MODULE (ROM)" .
❏ AT-135, "
DTC P1704 TRANSMISSION CONTROL MODULE (EEPROM)" .
❏ AT-136, "
DTC P1705 THROTTLE POSITION SENSOR" .
❏ AT-139, "
DTC P1710 A/T FLUID TEMPERATURE SENSOR CIRCUIT" .
❏ AT-143, "
DTC P1716 TURBINE REVOLUTION SENSOR" .
❏ AT-145, "
DTC P1721 VEHICLE SPEED SENSOR MTR" .
❏ AT-147, "
DTC P1730 A/T INTERLOCK" .
❏ AT-150, "
DTC P1731 A/T 1ST ENGINE BRAKING" .
❏ AT-152, "
DTC P1752 INPUT CLUTCH SOLENOID VALVE" .
❏ AT-154, "
DTC P1754 INPUT CLUTCH SOLENOID VALVE FUNCTION" .
❏ AT-156, "
DTC P1757 FRONT BRAKE SOLENOID VALVE" .
❏ AT-158, "
DTC P1759 FRONT BRAKE SOLENOID VALVE FUNCTION" .
❏ AT-160, "
DTC P1762 DIRECT CLUTCH SOLENOID VALVE" .
❏ AT-162, "
DTC P1764 DIRECT CLUTCH SOLENOID VALVE FUNCTION" .
❏ AT-164, "
DTC P1767 HIGH AND LOW REVERSE CLUTCH SOLENOID VALVE" .
❏ AT-166, "
DTC P1769 HIGH AND LOW REVERSE CLUTCH SOLENOID VALVE
FUNCTION" .
❏ AT-168, "
DTC P1772 LOW COAST BRAKE SOLENOID VALVE" .
❏ AT-170, "
DTC P1774 LOW COAST BRAKE SOLENOID VALVE FUNCTION" .
❏ AT-172, "
DTC P1815 MANUAL MODE SWITCH" .
❏ AT-178, "
DTC P1841 ATF PRESSURE SWITCH 1" .
❏ AT-180, "
DTC P1843 ATF PRESSURE SWITCH 3" .
❏ AT-182, "
DTC P1845 ATF PRESSURE SWITCH 5" .
❏ AT-184, "
DTC P1846 ATF PRESSURE SWITCH 6" .
4-2.Check at Idle
AT- 5 5
❏ AT- 1 9 3 , "Engine Cannot Be Started In “P” or “N” Position" .
❏ AT- 1 9 3 , "
In “P” Position, Vehicle Moves When Pushed" .
❏ AT- 1 9 4 , "
In “N” Position, Vehicle Moves" .
❏ AT- 1 9 5 , "
Large Shock (“N” to “D” Position)" .
❏ AT- 1 9 8 , "
Vehicle Does Not Creep Backward In “R” Position" .
❏ AT- 2 0 1 , "
Vehicle Does Not Creep Forward In “D” Position" .
4-3.Cruise test
AT- 5 7
Part 1
❏ AT- 2 0 3 , "
Vehicle Cannot Be Started From D1" .
❏ AT- 2 0 6 , "
A/T Does Not Shift: D1 → D2" .
❏ AT- 2 0 8 , "
A/T Does Not Shift: D2 → D3" .
❏ AT- 2 11 , "
A/T Does Not Shift: D3 → D4" .
❏ AT- 2 1 3 , "
A/T Does Not Shift: D4 → D5" .
❏ AT- 2 1 6 , "
A/T Does Not Perform Lock-up"
❏ AT- 2 1 8 , "A/T Does Not Hold Lock-up Condition" .
❏ AT- 2 2 0 , "
Lock-up Is Not Released" .
❏ AT- 2 2 1 , "
Engine Speed Does Not Return To Idle" .

AT-48
TROUBLE DIAGNOSIS
Revision: 2004 November 2004 FX35/FX45
44-3Part 2
AT- 6 0
❏ AT-203, "Vehicle Cannot Be Started From D1" .
❏ AT-206, "
A/T Does Not Shift: D1 → D2" .
❏ AT-208, "
A/T Does Not Shift: D2 → D3" .
❏ AT- 2 11 , "
A/T Does Not Shift: D3 → D4" .
Part 3
AT- 6 1
❏ AT-222, "Cannot Be Changed to Manual Mode" .
❏ AT-223, "
A/T Does Not Shift: 5th gear → 4th gear" .
❏ AT-225, "
A/T Does Not Shift: 4th gear → 3rd gear" .
❏ AT-227, "
A/T Does Not Shift: 3rd gear → 2nd gear" .
❏ AT-229, "
A/T Does Not Shift: 2nd gear → 1st gear" .
❏ AT-231, "
Vehicle Does Not Decelerate By Engine Brake" .
❏ Perform self-diagnostics. Enter checks for detected items. AT- 9 4
, AT-103
❏ AT-105, "DTC U1000 CAN COMMUNICATION LINE" .
❏ AT-108, "
DTC P0615 START SIGNAL CIRCUIT" .
❏ AT- 11 2 , "
DTC P0705 PARK/NEUTRAL POSITION SWITCH" .
❏ AT- 11 6 , "
DTC P0720 VEHICLE SPEED SENSOR A/T (REVOLUTION SENSOR)" .
❏ AT-121, "
DTC P0725 ENGINE SPEED SIGNAL" .
❏ AT-121, "
DTC P0725 ENGINE SPEED SIGNAL" .
❏ AT-123, "
DTC P0740 TORQUE CONVERTER CLUTCH SOLENOID VALVE" .
❏ AT-125, "
DTC P0744 A/T TCC S/V FUNCTION (LOCK-UP)" .
❏ AT-127, "
DTC P0745 LINE PRESSURE SOLENOID VALVE" .
❏ AT-129, "
DTC P1701 TRANSMISSION CONTROL MODULE (POWER SUPPLY)" .
❏ AT-133, "
DTC P1702 TRANSMISSION CONTROL MODULE (RAM)" .
❏ AT-134, "
DTC P1703 TRANSMISSION CONTROL MODULE (ROM)" .
❏ AT-135, "
DTC P1704 TRANSMISSION CONTROL MODULE (EEPROM)" .
❏ AT-136, "
DTC P1705 THROTTLE POSITION SENSOR" .
❏ AT-139, "
DTC P1710 A/T FLUID TEMPERATURE SENSOR CIRCUIT" .
❏ AT-143, "
DTC P1716 TURBINE REVOLUTION SENSOR" .
❏ AT-145, "
DTC P1721 VEHICLE SPEED SENSOR MTR" .
❏ AT-147, "
DTC P1730 A/T INTERLOCK" .
❏ AT-150, "
DTC P1731 A/T 1ST ENGINE BRAKING" .
❏ AT-152, "
DTC P1752 INPUT CLUTCH SOLENOID VALVE" .
❏ AT-154, "
DTC P1754 INPUT CLUTCH SOLENOID VALVE FUNCTION" .
❏ AT-156, "
DTC P1757 FRONT BRAKE SOLENOID VALVE" .
❏ AT-158, "
DTC P1759 FRONT BRAKE SOLENOID VALVE FUNCTION" .
❏ AT-160, "
DTC P1762 DIRECT CLUTCH SOLENOID VALVE" .
❏ AT-162, "
DTC P1764 DIRECT CLUTCH SOLENOID VALVE FUNCTION" .
❏ AT-164, "
DTC P1767 HIGH AND LOW REVERSE CLUTCH SOLENOID VALVE" .
❏ AT-166, "
DTC P1769 HIGH AND LOW REVERSE CLUTCH SOLENOID VALVE
FUNCTION" .
❏ AT-168, "
DTC P1772 LOW COAST BRAKE SOLENOID VALVE" .
❏ AT-170, "
DTC P1774 LOW COAST BRAKE SOLENOID VALVE FUNCTION" .
❏ AT-172, "
DTC P1815 MANUAL MODE SWITCH" .
❏ AT-178, "
DTC P1841 ATF PRESSURE SWITCH 1" .
❏ AT-180, "
DTC P1843 ATF PRESSURE SWITCH 3" .
❏ AT-182, "
DTC P1845 ATF PRESSURE SWITCH 5" .
❏ AT-184, "
DTC P1846 ATF PRESSURE SWITCH 6" .
5❏ Inspect each system for items found to be NG in the self-diagnostics and repair or replace the malfunction
parts.
6❏ Perform all road tests and enter the checks again for the required items.AT- 5 4
7❏ For any remaining NG items, perform the “diagnostics procedure” and repair or replace the malfunction parts.
See the chart for diagnostics by symptoms. (This chart also contains other symptoms and inspection proce-
dures.)AT- 6 5
8❏ Erase the results of the self-diagnostics from the TCM.AT- 4 0,
AT- 1 0 4

TROUBLE DIAGNOSIS
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Inspections Before Trouble DiagnosisACS007A7
A/T FLUID CHECK
Fluid Leakage and Fluid Level Check

Inspect for fluid leakage and check the fluid level. Refer to AT- 1 2 , "Checking A/T Fluid" .
Fluid Condition Check
Inspect the 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). Inspect the
amount of A/T fluid. 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 “N” position.
8. Cool down the A/T fluid.
Fluid condition Conceivable Cause Required Operation
Varnished (viscous
varnish state)Clutch, brake
scorchedReplace the A/T fluid and check the
A/T main unit and the vehicle for
malfunctions (wire harnesses,
cooler pipes, etc.)
Milky white or
cloudyWater in the fluidReplace the A/T fluid and check for
places where water is getting in.
Large amount of
metal powder mixed
inUnusual wear of
sliding parts within
A/TReplace the A/T fluid and check for
improper operation of the A/T.
SAT638A
SAT647B
SCIA1224E
SAT514G

AT-52
TROUBLE DIAGNOSIS
Revision: 2004 November 2004 FX35/FX45
CAUTION:
Run the engine at idle for at least one minute.
Judgement 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 A/T fluid reaches in range of 50 to 80°C (122
to 176°F), then inspect the amount of A/T fluid 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 front propeller shaft from vehicle (with AWD models). Refer to PR-4, "
Removal and Installation" . Stall speed:
VQ35DE engine: 2,650 - 2,950 rpm
VK45DE engine: 2,300 - 2,600 rpm
Selector lever position
Expected problem location
D, M R
Stall speedHO

Forward brake

Forward one-way clutch

1st one-way clutch

3rd one-way clutch
OH

Reverse brake
LL

Engine and torque converter one-way clutch
HH

Line pressure low
Does not shift up D, M position 1 → 2 Slipping in 2nd, 3rd, 4th gears Direct clutch slippage
Does not shift up D, M position 2 → 3 Slipping in 3rd, 4th, 5th gears high and low reverse clutch slippage
Does not shift up D, M position 3 → 4 Slipping in 4th, 5th gears Input clutch slippage
Does not shift up D, M position 4 → 5 Slipping in 5th gear Front brake slippage
SCIA2187E

TROUBLE DIAGNOSIS
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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 gauge, be sure to use the O-
ring attached to the oil pressure detection plug.
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 and
the stall speed.
CAUTION:

Keep the brake pedal pressed all the way down during
measurement.

When measuring the line pressure at the stall speed,
refer to AT- 5 1 , "
STALL TEST" .
7. After the measurements are complete, install the oil pressure
detection plug and tighten to the regulation torque below.
CAUTION:
Do not reuse the O-ring.
Line Pressure
SCIA5309E
SCIA1224E
:7.3 N·m (0.74 kg-m, 65 in-lb)SAT493G
Engine speedLine pressure [kPa (kg/cm
2 , psi)]
R position D, M positions
At idle speed 392 - 441 (4.0 - 4.5, 57 - 64) 373 - 422 (3.8 - 4.3, 54 - 61)
At stall speed 1,700 - 1,890 (17.3 - 19.3, 247 - 274) 1,310 - 1,500 (13.3 - 15.3, 190 - 218)

TROUBLE DIAGNOSIS
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Check Before Engine is StartedACS007A8
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”. (Do not start engine.)
Does A/T CHECK indicator lamp light up for about 2 seconds?
YES >> GO TO 2.
NO >> Stop the road test and go to AT- 1 9 1 , "
A/T CHECK Indicator Lamp Does Not Come On" .
2. CHECK A/T CHECK INDICATOR LAMP
Does A/T CHECK indicator lamp flash for about 8 seconds?
YES >> For TCM fail-safe mode, carry out self-diagnostics and record all NG items on the diagnostics
worksheet. Refer to AT- 9 4
, AT- 1 0 3 .
NO >> 1. Turn ignition switch “OFF”.
2. Carry out the self-diagnostics and record all NG items on the diagnostics worksheet. Refer to
AT- 9 4
, AT- 1 0 3 .
3. Go to AT- 5 5 , "
Check at Idle" .
Check at Idle ACS007A9
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. Turn ignition switch “START”.
Does the engine start?
YES >> GO TO 2.
NO >> Stop the road test and go to AT- 1 9 3 , "
Engine Cannot Be Started In “P” or “N” Position" .
2. CHECK STARTING THE ENGINE
1. Turn ignition switch “ON”. (Do not start engine.)
2. Move selector lever in “D”, “M” or “R” position.
3. Turn ignition switch “START”.
Does the engine start in either position?
YES >> Stop the road test and go to AT- 1 9 3 , "Engine Cannot Be Started In “P” or “N” Position" .
NO >> GO TO 3.
3. CHECK “P” POSITION FUNCTIONS
1. Move selector lever to “P” position.
2. Turn ignition switch “OFF”.
3. Release the parking brake.
4. Push the vehicle forward or backward.
5. Engage the parking brake.
When you push the vehicle with disengaging the parking brake, does it move?
YES >> Enter a check mark at “In “P” position, Vehicle Moves When Pushed” on the diagnostics work-
sheet AT- 4 6
, then continue the road test.
NO >> GO TO 4.