2004 INFINITI FX35 engine spec

AT-30
A/T CONTROL SYSTEM
Revision: 2004 November 2004 FX35/FX45
TCM FunctionACS002LF
The function of the TCM is to:

Receive input signals sent from various switches and sensors.

Determine required line pressure, shifting point, lock-up operation, and engine brake operation.

Send required output signals to the respective solenoids.
CONTROL SYSTEM OUTLINE
The automatic transmission senses vehicle operating conditions through various sensors or signals. It always
controls the optimum shift position and reduces shifting and lock-up shocks.
CONTROL SYSTEM DIAGRAM
SENSORS (or SIGNALS)

TCM

ACTUATORS
PNP switch
Accelerator pedal position sensor
Closed throttle position signal
Wide open throttle position signal
Engine speed signal
A/T fluid temperature sensor
Revolution sensor
Vehicle speed signal
Manual mode switch signal
Stop lamp switch signal
Turbine revolution sensor
ATF pressure switchShift control
Line pressure control
Lock-up control
Engine brake control
Timing control
Fail-safe control
Self-diagnosis
CONSULT-II communication line
Duet-EA control
CAN systemInput clutch solenoid valve
Direct clutch solenoid valve
Front brake solenoid valve
High and low reverse clutch
solenoid valve
Low coast brake solenoid valve
Torque converter clutch solenoid
valve
Line pressure solenoid valve
A/T CHECK indicator lamp
Starter relay
Back-up lamp relay
SCIA5325E

AT-42
TROUBLE DIAGNOSIS
Revision: 2004 November 2004 FX35/FX45
TROUBLE DIAGNOSISPFP:00004
DTC Inspection Priority ChartACS007A2
If some DTCs are displayed at the same time, perform inspections one by one based on the following priority
chart.
NOTE:
If DTC “U1000” is displayed with other DTC, first perform the trouble diagnosis for “DTC U1000 CAN
COMMUNICATION LINE”. Refer to AT- 1 0 5
.
Fail-SafeACS007A3
The TCM has an electrical fail-safe mode. This mode makes it possible to operate even if there is a an mal-
function in a main electronic control input/output signal circuit.
In fail-safe mode, even if the selector lever is “D” or “M” mode, the transmission is fixed in 2nd or 4th (depend-
ing on the breakdown position), so the customer should feel “slipping” or “poor acceleration”. When fail-safe
mode is triggered, when the ignition switch is switched “ON”, the A/T CHECK indicator lamp flashes for about
8 seconds. (Refer to AT- 1 0 3 , "
TCM SELF-DIAGNOSTIC PROCEDURE (NO TOOLS)" ).
Even when the electronic circuits are normal, under special conditions (for example, when slamming on the
brake with the wheels spinning drastically and stopping the tire rotation), the transmission can go into fail-safe
mode. If this happens, switch “OFF” the ignition switch for 10 seconds, then switch it “ON” again to return to
the normal shift pattern. Also, the A/T CHECK indicator lamp flashes for about 8 seconds once, then is
cleared. Therefore, the customer's vehicle has returned to normal, so handle according to the “diagnostics
flow” (Refer to AT- 4 5
).
FAIL-SAFE FUNCTION
If any malfunction occurs in a sensor or solenoid, this function controls the A/T to make driving possible.
Vehicle Speed Sensor A/T (Revolution Sensor)

Signals are input from two systems - from vehicle speed sensor A/T (revolution sensor) installed on the
transmission and from combination meter so normal driving is possible even if there is a malfunction in
one of the systems. And if vehicle speed sensor A/T (revolution sensor) has unusual cases, 5th gear and
manual mode are prohibited.
Accelerator Pedal Position Sensor

If there is a malfunction in one of the systems, the accelerator opening angle is controlled by ECM accord-
ing to a pre-determined accelerator angle to make driving possible. And if there are malfunctions in tow
systems, the engine speed is fixed by ECM to a pre-determined engine speed to make driving possible.
Throttle Position Sensor

If there is a malfunction in one of the systems, the accelerator opening angle is controlled by ECM accord-
ing to a pre-determined accelerator angle to make driving possible. And if there are malfunctions in tow
systems, the accelerator opening angle is controlled by the idle signal sent from the ECM which is based
on input indicating either idle condition or off-idle condition (pre-determined accelerator opening) in order
to make driving possible.
PNP Switch

In the unlikely event that a malfunction signal enters the TCM, the position indicator is switched “OFF”, the
starter relay is switched “OFF” (starter starting is disabled), the back-up lamp relay switched “OFF” (back-
up lamp is OFF) and the position is fixed to the “D” range to make driving possible.
Starter Relay

The starter relay is switched “OFF”. (Starter starting is disabled.)
Priority Detected items (DTC)
1 U1000 CAN communication line
2 Except above

AT-44
TROUBLE DIAGNOSIS
Revision: 2004 November 2004 FX35/FX45
How To Perform Trouble Diagnosis For Quick and Accurate RepairACS007A4
INTRODUCTION
The TCM receives a signal from the vehicle speed sensor, accelerator pedal position sensor (throttle position
sensor) or PNP switch and provides shift control or lock-up control via A/T solenoid valves.
The TCM also communicates with the ECM by means of a signal
sent from sensing elements used with the OBD-related parts of the
A/T system for malfunction-diagnostic purposes. The TCM is capa-
ble of diagnosing malfunctioning parts while the ECM can store mal-
functions in its memory.
Input and output signals must always be correct and stable in the
operation of the A/T system. The A/T system must be in good oper-
ating condition and be free of valve seizure, solenoid valve malfunc-
tion, etc.
It is much more difficult to diagnose a error that occurs intermittently
rather than continuously. Most intermittent errors are caused by poor
electric connections or improper wiring. In this case, careful check-
ing of suspected circuits may help prevent the replacement of good
parts.
A visual check only may not find the cause of the errors. A road test
with CONSULT-II (or GST) or a circuit tester connected should be
performed. Follow the AT- 4 5 , "
WORK FLOW" .
Before undertaking actual checks, take a few minutes to talk with a
customer who approaches with a drive ability complaint. The cus-
tomer can supply good information about such errors, especially
intermittent ones. Find out what symptoms are present and under
what conditions they occur. A “DIAGNOSTIC WORKSHEET” as
shown on the example (Refer to AT- 4 6
) should be used.
Start your diagnosis by looking for “conventional” errors first. This will
help troubleshoot drive ability errors on an electronically controlled
engine vehicle.
Also check related Service bulletins.
SAT631IB
SAT632I
SEF234G

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:

TROUBLE DIAGNOSIS
AT-47
D
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AT
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
AT-51
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AT
Revision: 2004 November 2004 FX35/FX45
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