Engine INFINITI FX35 2004 Service Manual

TROUBLE DIAGNOSIS FOR SYMPTOMS
AT-211
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Revision: 2004 November 2004 FX35/FX45
A/T Does Not Shift: D3 → D4ACS007GN
SYMPTOM:

The vehicle does not shift-up from the D3 to D4 gear at the specified speed.

The vehicle does not shift-up from the D3 to D4 gear unless A/T is warmed up.
DIAGNOSTIC PROCEDURE
1. CONFIRM THE SYMPTOM
Check if vehicle creeps forward in “D” position” and vehicle can be started from D
1.
OK or NG
OK >> GO TO 2.
NG >> Refer to AT- 2 0 1 , "
Vehicle Does Not Creep Forward In “D” Position" , AT- 2 0 3 , "Vehicle Cannot Be
Started From D1" .
2. CHECK SELF-DIAGNOSTIC RESULTS
Perform self-diagnosis. Refer to AT- 9 4 , "
SELF-DIAGNOSTIC RESULT MODE" .
Do the self-diagnostic results indicate ATF pressure switch 1, ATF pressure switch 3, front brake solenoid
valve, input clutch solenoid valve, accelerator pedal position sensor, vehicle speed sensor A/T (revolution sen-
sor) and vehicle speed sensor MTR?
YES >> Check the malfunctioning system. Refer to AT- 1 7 8 , "DTC P1841 ATF PRESSURE SWITCH 1" ,
AT- 1 8 0 , "
DTC P1843 ATF PRESSURE SWITCH 3" , AT- 1 5 2 , "DTC P1752 INPUT CLUTCH
SOLENOID VALVE" , AT- 1 5 6 , "DTC P1757 FRONT BRAKE SOLENOID VALVE" , EC-555, "DTC
P2122, P2123 APP SENSOR" (for VQ35DE) or EC-1225, "DTC P2122, P2123 APP SENSOR"
(for VK45DE), EC-562, "DTC P2127, P2128 APP SENSOR" (for VQ35DE) or EC-1232, "DTC
P2127, P2128 APP SENSOR" (for VK45DE), EC-576, "DTC P2138 APP SENSOR" (for
VQ35DE) or EC-1246, "
DTC P2138 APP SENSOR" (for VK45DE), AT- 1 3 6 , "DTC P1705
THROTTLE POSITION SENSOR" , AT- 11 6 , "DTC P0720 VEHICLE SPEED SENSOR A/T (REV-
OLUTION SENSOR)" , AT- 1 4 5 , "DTC P1721 VEHICLE SPEED SENSOR MTR" .
NO >> GO TO 3.
3. CHECK A/T FLUID LEVEL
Check A/T fluid level. Refer to AT- 1 2 , "
Checking A/T Fluid" .
OK or NG
OK >> GO TO 4.
NG >> Refill ATF.
4. CHECK LINE PRESSURE
Check line pressure at the engine stall point. Refer to AT- 5 2 , "
LINE
PRESSURE TEST" .
OK or NG
OK >> GO TO 7.
NG - 1 >> Line pressure high. GO TO 5.
NG - 2 >> Line pressure low. GO TO 6.
SAT638A
SAT494G

AT-214
TROUBLE DIAGNOSIS FOR SYMPTOMS
Revision: 2004 November 2004 FX35/FX45
3. CHECK A/T FLUID LEVEL
Check A/T fluid level. Refer to AT- 1 2 , "
Checking A/T Fluid" .
OK or NG
OK >> GO TO 4.
NG >> Refill ATF.
4. CHECK LINE PRESSURE
Check line pressure at the engine stall point. Refer to AT- 5 2 , "
LINE
PRESSURE TEST" .
OK or NG
OK >> GO TO 7.
NG - 1 >> Line pressure high. GO TO 5.
NG - 2 >> Line pressure low. GO TO 6.
5. DETECT MALFUNCTIONING ITEM
1. Check control valve with TCM. Refer to AT- 2 4 2 , "
Control Valve with TCM and A/T Fluid Temperature Sen-
sor 2" .
2. Disassemble A/T. Refer to AT- 2 8 6 , "
DISASSEMBLY" .
3. Check the following items:
–Oil pump assembly. Refer to AT- 3 0 3 , "Oil Pump" .
OK or NG
OK >> GO TO 7.
NG >> Repair or replace damaged parts.
6. DETECT MALFUNCTIONING ITEM
1. Check control valve with TCM. Refer to AT- 2 4 2 , "
Control Valve with TCM and A/T Fluid Temperature Sen-
sor 2" .
2. Disassemble A/T. Refer to AT- 2 8 6 , "
DISASSEMBLY" .
3. Check the following items:
–Oil pump assembly. Refer to AT- 3 0 3 , "Oil Pump" .
–Power train system. Refer to AT- 2 8 6 , "DISASSEMBLY" .
–Transmission case. Refer to AT- 2 8 6 , "DISASSEMBLY" .
OK or NG
OK >> GO TO 7.
NG >> Repair or replace damaged parts.
SAT638A
SAT494G

AT-216
TROUBLE DIAGNOSIS FOR SYMPTOMS
Revision: 2004 November 2004 FX35/FX45
A/T Does Not Perform Lock-upACS007GP
SYMPTOM:
A/T does not perform lock-up at the specified speed.
DIAGNOSTIC PROCEDURE
1. CHECK SELF-DIAGNOSTIC RESULTS
Perform self-diagnosis. Refer to AT- 9 4 , "
SELF-DIAGNOSTIC RESULT MODE" , AT- 1 0 3 , "TCM SELF-DIAG-
NOSTIC PROCEDURE (NO TOOLS)" .
Do the self-diagnostic results indicate torque converter clutch solenoid valve, engine speed signal, turbine rev-
olution sensor, accelerator pedal position sensor, CAN communication?
YES >> Check the malfunctioning system. Refer to AT- 1 2 3 , "DTC P0740 TORQUE CONVERTER
CLUTCH SOLENOID VALVE" , AT- 1 2 1 , "DTC P0725 ENGINE SPEED SIGNAL" , AT- 1 4 3 , "DTC
P1716 TURBINE REVOLUTION SENSOR" , EC-555, "DTC P2122, P2123 APP SENSOR" (for
VQ35DE) or EC-1225, "
DTC P2122, P2123 APP SENSOR" (for VK45DE), EC-562, "DTC P2127,
P2128 APP SENSOR" (for VQ35DE) or EC-1232, "DTC P2127, P2128 APP SENSOR" (for
VK45DE), EC-576, "
DTC P2138 APP SENSOR" (for VQ35DE) or EC-1246, "DTC P2138 APP
SENSOR" (for VK45DE), AT- 1 3 6 , "DTC P1705 THROTTLE POSITION SENSOR" , AT- 1 0 5 ,
"DTC U1000 CAN COMMUNICATION LINE" .
NO >> GO TO 2.
2. CHECK A/T FLUID LEVEL
Check A/T fluid level. Refer to AT- 1 2 , "
Checking A/T Fluid" .
OK or NG
OK >> GO TO 3.
NG >> Refill ATF.
3. CHECK LINE PRESSURE
Check line pressure at the engine stall point. Refer to AT- 5 2 , "
LINE
PRESSURE TEST" .
OK or NG
OK >> GO TO 6.
NG - 1 >> Line pressure high. GO TO 4.
NG - 2 >> Line pressure low. GO TO 5.
SAT638A
SAT494G

AT-218
TROUBLE DIAGNOSIS FOR SYMPTOMS
Revision: 2004 November 2004 FX35/FX45
9. CHECK TCM
1. Check TCM input/output signals. Refer to AT- 9 0 , "
TCM Input/Output Signal Reference Values" .
2. If NG, recheck A/T assembly harness connector terminals for damage or loose connection with harness
connector.
OK or NG
OK >>INSPECTION END
NG >> Repair or replace damaged parts.
10. DETECT MALFUNCTIONING ITEM

Check the malfunction items. If any items are damaged, repair or replace damaged parts. Refer to AT- 6 5 ,
"Symptom Chart" (Symptom No.24).
OK or NG
OK >> GO TO 8.
NG >> Repair or replace damaged parts.
A/T Does Not Hold Lock-up ConditionACS007GQ
SYMPTOM:
The lock-up condition cannot be maintained for more than 30 seconds.
DIAGNOSTIC PROCEDURE
1. CHECK SELF-DIAGNOSTIC RESULTS
Perform self-diagnosis. Refer to AT- 9 4 , "
SELF-DIAGNOSTIC RESULT MODE" , AT- 1 0 3 , "TCM SELF-DIAG-
NOSTIC PROCEDURE (NO TOOLS)" .
Do the self-diagnostic results indicate torque converter clutch solenoid valve, engine speed signal, turbine rev-
olution sensor, CAN communication?
YES >> Check the malfunctioning system. Refer to AT- 1 2 3 , "DTC P0740 TORQUE CONVERTER
CLUTCH SOLENOID VALVE" , AT- 1 2 1 , "DTC P0725 ENGINE SPEED SIGNAL" , AT- 1 4 3 , "DTC
P1716 TURBINE REVOLUTION SENSOR" , AT- 1 0 5 , "DTC U1000 CAN COMMUNICATION
LINE" .
NO >> GO TO 2.
2. CHECK A/T FLUID LEVEL
Check A/T fluid level. Refer to AT- 1 2 , "
Checking A/T Fluid" .
OK or NG
OK >> GO TO 3.
NG >> Refill ATF.
SAT638A

AT-220
TROUBLE DIAGNOSIS FOR SYMPTOMS
Revision: 2004 November 2004 FX35/FX45
Lock-up Is Not ReleasedACS007GR
SYMPTOM:
The lock-up condition cannot be cancelled even after releasing the accelerator pedal.
DIAGNOSTIC PROCEDURE
1. CHECK SELF-DIAGNOSTIC RESULTS
Perform self-diagnosis. Refer to AT- 9 4 , "
SELF-DIAGNOSTIC RESULT MODE" , AT- 1 0 3 , "TCM SELF-DIAG-
NOSTIC PROCEDURE (NO TOOLS)" .
Do the self-diagnostic results indicate torque converter clutch solenoid valve, engine speed signal, turbine rev-
olution sensor, CAN communication?
YES >> Check the malfunctioning system. Refer to AT- 1 2 3 , "DTC P0740 TORQUE CONVERTER
CLUTCH SOLENOID VALVE" , AT- 1 2 1 , "DTC P0725 ENGINE SPEED SIGNAL" , AT- 1 4 3 , "DTC
P1716 TURBINE REVOLUTION SENSOR" , AT- 1 0 5 , "DTC U1000 CAN COMMUNICATION
LINE" .
NO >> GO TO 2.
2. CHECK SYMPTOM
Check again. Refer to AT- 5 7 , "
Cruise Test - Part 1" .
OK or NG
OK >>INSPECTION END
NG >> GO TO 3.
3. CHECK TCM
1. Check TCM input/output signals. Refer to AT- 9 0 , "
TCM Input/Output Signal Reference Values" .
2. If NG, recheck A/T assembly harness connector terminals for damage or loose connection with harness
connector.
OK or NG
OK >>INSPECTION END
NG >> Repair or replace damaged parts.

TROUBLE DIAGNOSIS FOR SYMPTOMS
AT-221
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Revision: 2004 November 2004 FX35/FX45
Engine Speed Does Not Return To IdleACS007GS
SYMPTOM:
When a shift-down is performed, the engine speed does not smoothly return to the idling speed.
DIAGNOSTIC PROCEDURE
1. CHECK A/T FLUID LEVEL
Check A/T fluid level. Refer to AT- 1 2 , "
Checking A/T Fluid" .
OK or NG
OK >> GO TO 2.
NG >> Refill ATF.
2. CHECK SELF-DIAGNOSTIC RESULTS
Perform self-diagnosis. Refer to AT- 9 4 , "
SELF-DIAGNOSTIC RESULT MODE" .
Do the self-diagnostic results indicate front brake solenoid valve, direct clutch solenoid valve, ATF pressure
switch 1, ATF pressure switch 5, accelerator pedal position sensor, vehicle speed sensor A/T (revolution sen-
sor) and vehicle speed sensor MTR?
YES >> Check the malfunctioning system. Refer to AT- 1 5 6 , "DTC P1757 FRONT BRAKE SOLENOID
VA LV E" , AT- 1 6 0 , "DTC P1762 DIRECT CLUTCH SOLENOID VALVE" , AT- 1 7 8 , "DTC P1841 ATF
PRESSURE SWITCH 1" , AT- 1 8 2 , "DTC P1845 ATF PRESSURE SWITCH 5" , EC-555, "DTC
P2122, P2123 APP SENSOR" (for VQ35DE) or EC-1225, "DTC P2122, P2123 APP SENSOR"
(for VK45DE), EC-562, "DTC P2127, P2128 APP SENSOR" (for VQ35DE) or EC-1232, "DTC
P2127, P2128 APP SENSOR" (for VK45DE), EC-576, "DTC P2138 APP SENSOR" (for
VQ35DE) or EC-1246, "
DTC P2138 APP SENSOR" (for VK45DE), AT- 1 3 6 , "DTC P1705
THROTTLE POSITION SENSOR" , AT- 11 6 , "DTC P0720 VEHICLE SPEED SENSOR A/T (REV-
OLUTION SENSOR)" , AT- 1 4 5 , "DTC P1721 VEHICLE SPEED SENSOR MTR" .
NO >> GO TO 3.
3. CHECK A/T FLUID CONDITION
1. Remove oil pan. Refer to AT- 2 4 2 , "
Control Valve with TCM and A/T Fluid Temperature Sensor 2" .
2. Check A/T fluid condition. Refer to AT- 5 1 , "
Fluid Condition
Check" .
OK or NG
OK >> GO TO 4.
NG >> GO TO 7.
4. DETECT MALFUNCTIONING ITEM

Check the malfunction items. If any items are damaged, repair or replace damaged parts. Refer to AT- 6 5 ,
"Symptom Chart" (Symptom No.72).
OK or NG
OK >> GO TO 5.
NG >> Repair or replace damaged parts.
SAT638A
SCIA5199E

TROUBLE DIAGNOSIS FOR SYMPTOMS
AT-231
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Revision: 2004 November 2004 FX35/FX45
Vehicle Does Not Decelerate By Engine BrakeACS007GY
SYMPTOM:
No engine brake is applied when the gear is shifted from the 2nd to 1st gear.
DIAGNOSTIC PROCEDURE
1. CHECK SELF-DIAGNOSTIC RESULTS
Perform self-diagnosis. Refer to AT- 9 4 , "
SELF-DIAGNOSTIC RESULT MODE" .
Do the self-diagnostic results indicate PNP switch, ATF pressure switch 5?
YES >> Check the malfunctioning system. Refer to AT- 11 2 , "DTC P0705 PARK/NEUTRAL POSITION
SWITCH" , AT- 1 8 2 , "DTC P1845 ATF PRESSURE SWITCH 5" .
NO >> GO TO 2.
2. CHECK A/T FLUID LEVEL
Check A/T fluid level. Refer to AT- 1 2 , "
Checking A/T Fluid" .
OK or NG
OK >> GO TO 3.
NG >> Refill ATF.
3. CHECK CONTROL LINKAGE
Check the control linkage.

Refer to AT- 2 3 4 , "Checking of A/T Position" .
OK or NG
OK >> GO TO 4.
NG >> Adjust control linkage. Refer to AT- 2 3 4 , "
Adjustment of A/T Position" .
4. MANUAL MODE SWITCH
Check the manual mode switch. Refer to AT- 1 7 2 , "
DTC P1815 MANUAL MODE SWITCH" .
OK or NG
OK >> GO TO 5.
NG >> Repair or replace damaged parts.
5. CHECK A/T FLUID CONDITION
1. Remove oil pan. Refer to AT- 2 4 2 , "
Control Valve with TCM and A/T Fluid Temperature Sensor 2" .
2. Check A/T fluid condition. Refer to AT- 5 1 , "
Fluid Condition
Check" .
OK or NG
OK >> GO TO 6.
NG >> GO TO 9.
SAT638A
SCIA5199E

AT-234
SHIFT CONTROL SYSTEM
Revision: 2004 November 2004 FX35/FX45
REMOVAL
1. Disconnect lower lever of control device and control rod.
2. Remove knob cover below selector lever downward.
3. Pull lock pin out of selector lever knob.
4. Remove selector lever knob.
5. Remove console finisher.

Refer to IP-10, "Component Parts Drawing" .
6. Remove center console.

Refer to IP-10, "Component Parts Drawing" .
7. Remove key interlock cable from control device.

Refer to AT- 2 4 0 , "Removal and Installation" .
8. Disconnect A/T device harness connector.
9. Remove control device assembly.
INSTALLATION
Install in reverse order of removal. Be careful of the following:

After installation is completed, adjust and check A/T position.
Adjustment of A/T PositionACS002RR
1. Loosen nut of control rod.
2. Place PNP switch and selector lever in “P” position.
3. While pressing lower lever toward rear of vehicle (in P position
direction), tighten nut to specified torque.
CAUTION:
Do not push the bracket.
Checking of A/T PositionACS002RS
1. Place selector lever in “P” position, and turn ignition switch ON (Do not start engine).
2. Make sure selector lever can be shifted to other than “P” position when brake pedal is depressed. Also
make sure selector lever can be shifted from “P” position only when brake pedal is depressed.
3. Move the selector lever and check for excessive effort, sticking, noise or rattle.
4. Confirm the selector lever stops at each position with the feel of engagement when it is moved through all
the positions. Check whether or not the actual position the selector lever is in matches the position shown
by the shift position indicator and the transmission body.
5. The method of operating the lever to individual positions cor-
rectly should be as shown in the figure.
6. When selector button is pressed in “P”, “R”, or “N” position with-
out applying forward/backward force to selector lever, check but-
ton operation for sticking.
7. Confirm the back-up lamps illuminate only when lever is placed
in the “R” position. Confirm the back-up lamps does not illumi-
nate when selector lever is pushed against “R” position in the
“P” or “N” position.
8. Confirm the engine can only be started with the selector lever in
the “P” and “N” positions.
9. Make sure transmission is locked completely in “P” position.
10. When selector lever is set to manual shift gate, make sure manual mode is displayed on combination
meter.
Shift selector lever to “+” and “-” sides, and make sure set shift position changes.
SCIA4954E
:26 N·m (2.7 kg-m, 19 ft-lb)
SCIA2119E
SCIA3906E

A/T SHIFT LOCK SYSTEM
AT-237
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Revision: 2004 November 2004 FX35/FX45
Diagnostic ProcedureACS002RW
SYMPTOM 1:

Selector lever cannot be moved from “P” position with key in ON position and brake pedal
applied.

Selector lever can be moved from “P” position with key in ON position and brake pedal released.

Selector lever can be moved from “P” position when key is removed from key cylinder.
SYMPTOM 2:

Ignition key cannot be removed when selector lever is set to “P” position.

Ignition key can be removed when selector lever is set to any position except “P” position.
1. CHECK KEY INTERLOCK CABLE
Check the key interlock cable for damage.
OK or NG
OK >> GO TO 2.
NG >> Repair key interlock cable. Refer to AT- 2 3 9 , "
KEY INTERLOCK CABLE" .
2. CHECK SELECTOR LEVER POSITION
Check the selector lever position for damage.
OK or NG
OK >> GO TO 3.
NG >> Adjustment control linkage. Refer to AT- 2 3 4 , "
Adjustment of A/T Position" .
3. CHECK SHIFT LOCK SOLENOID AND PARK POSITION SWITCH
1. Connect A/T device harness connector.
2. Turn ignition switch “ON”.
3. Selector lever is set in “P” position.
4. Check operation sound.
OK or NG
OK >>INSPECTION END
NG >> GO TO 4.
4. CHECK POWER SOURCE
1. Turn ignition switch “ON”. (Do not start engine.)
2. Check the voltage between A/T device harness connector M67
terminal 1(G/R) and ground. Refer to AT- 2 3 6 , "
Wiring Diagram
— AT — SHIFT" .
OK or NG
OK >> GO TO 7.
NG >> GO TO 5.
Condition Brake pedal Operation sound
When ignition switch is turned to
“ON” position and selector lever
is set in “P” position.Depressed Yes
Released No
Condition Brake pedal Data (Approx.)
When ignition switch is turned to
“ON” position.Depressed Battery voltage
Released 0V
SCIA2122E

ON-VEHICLE SERVICE
AT-253
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Revision: 2004 November 2004 FX35/FX45
Parking Components (2WD Models Only)ACS007H0
COMPONENTS
REMOVAL
1. Drain ATF through drain plug.
2. Remove exhaust front tube and center muffler with power tool. Refer to EX-3, "
Removal and Installation" .
3. Remove rear propeller shaft. Refer to PR-7, "
Removal and Installation" .
4. Support transmission assembly with a transmission jack.
CAUTION:
When setting transmission jack, be careful not to allow it to collide against the drain plug.
5. Remove engine rear member with power tool. Refer to AT- 2 6 6 , "
Removal and Installation (2WD Models)"
.
1. Rear oil seal 2. Rear extension 3. Parking actuator support
4. Parking pawl 5. Return spring 6. Pawl shaft
7. Self-sealing bolt 8. Seal ring 9. Parking gear
10. Output shaft 11. Bearing race 12. Needle bearing
SCIA5216E