2008 INFINITI FX35 engine control system

ABCDEFGHIJKLQUICK REFERENCE INDEX AGENERAL INFORMATIONGIGeneral InformationBENGINEEMEngine MechanicalLUEngine Lubrication SystemCOEngine Cooling SystemECEngine Control SystemFLFuel SystemEXExhaust SystemACCAccelerator Control SystemCTRANSMISSION/
TRANSAXLEATAutomatic TransmissionDDRIVELINE/AXLETFTransferPRPropeller ShaftFFDFront Final DriveRFDRear Final DriveFAXFront AxleRAXRear AxleESUSPENSIONFSUFront SuspensionRSURear SuspensionWTRoad Wheels & TiresFBRAKESBRBrake SystemPBParking Brake SystemBRCBrake Control SystemGSTEERINGPSPower Steering SystemHRESTRAINTSSBSeat BeltsSRSSupplemental Restraint System
(SRS)IBODYBLBody, Lock & Security SystemGWGlasses, Window System & Mir-
rorsRFRoofEIExterior & InteriorIPInstrument PanelSESeatJAIR CONDITIONERATCAutomatic Air ConditionerKELECTRICALSCStarting & Charging SystemLTLighting SystemDIDriver Information SystemWWWiper, Washer & HornBCSBody Control SystemLANLAN SystemAVAudio Visual, Navigation & Tele-
phone SystemACSAuto Cruise Control SystemPGPower Supply, Ground & Circuit Ele-
mentsLMAINTENANCEMAMaintenanceEdition: April 2007
Revision: April 2007

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ENGINE
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SECTION ACC
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CONTENTS
ACCELERATOR CONTROL SYSTEM
SERVICE INFORMATION .. ..........................2
PRECAUTIONS .............................................. .....2
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" ............................................................. ......
2
ACCELERATOR CONTROL SYSTEM ..............3
Component .......................................................... .....3
Removal and Installation ..........................................3
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ACTION TESTACS-11
< SERVICE INFORMATION > [ICC]
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ACTION TEST
ICC System Running TestINFOID:0000000001328811
VEHICLE-TO-VEHICLE DISTANCE CONTROL MODE
Set Checking
1. Press the MAIN switch for less than 1.5 seconds.
2. Drive the vehicle between 40 km/h (25 MPH) and 144 km/h (90 MPH).
3. Push the SET/COAST switch.
4. Confirm that the desired speed is set as hand is released from the SET/COAST switch.
NOTE:
 When there is no vehicle ahead, drive at the set speed steadily.
 When there is a vehicle ahead, control to maintain distance from the vehicle ahead, watching its speed.
 The set vehicle speed is displayed on the ICC system indicator in the combination meter.
Check For Increase Of Cruising Speed
1. Set vehicle-to-vehicle distance control mode at desired speed.
2. Check if the set speed increases by 1 km/h (1 MPH) as RESUME/ACCELERATE switch is pushed.
NOTE:
The maximum set speed of the vehicle-to-vehicl e distance control mode is 144 km/h (90 MPH).
Check For Decrease Of Cruising Speed
1. Set vehicle-to-vehicle distance control mode at desired speed.
2. Check if the set speed decreases by 1 km/h (1 MPH) as SET/COAST switch is pushed.
NOTE:
 Vehicle-to-vehicle distance control mode is automatica lly turned off when the driving speed lowers to 32 km/
h (20 MPH) due to the deceleration of the vehicle ahead.
 The minimum set speed of the vehicle-to-vehicle distance control mode is 40 km/h (25 MPH).
Check For Cancellation Of Vehicle-To-Vehicle Distance Control Mode (Normal Driving Condition) In The Following
Cases:
 When the brake pedal is depressed after the system is turned ON.
 When the selector lever is shifted to the “N” (Neutral) position.
 When the MAIN switch is turned OFF.
 When CANCEL switch is operated.
Check For Restoring Speed That Is Set By Vehicle-To-Vehicle Distance Control Mode Before Cancellation
1. Cancel the system by depressing the foot brake. Then, check that the speed before cancellation is
restored when pressing RESUME/ACCELERATE switch with 40 km/h (25 MPH) or above.
2. Cancel the system by shifting the selector lever to “N” position. Then, check if the speed set before the
cancellation is restored when RESU ME/ACCELERATE switch is pushed up.
3. Check if the speed previously set is restored w hen RESUME/ACCELERATE switch is operated with driv-
ing 40 km/h (25 MPH), after canceling vehicle-to-v ehicle distance control mode by operating the CANCEL
switch.
Check For MAIN Switch
1. Start engine. Then, check if the following operations are per- formed correctly.
2. Vehicle-to-vehicle distance control mode is displayed in combi- nation meter illuminates when MAIN switch is pressed “ON” for
less than 1.5 seconds and ready for operation. The illumination
goes off when MAIN switch is turned to OFF.
3. “CRUISE” illumination and ICC system display go off when the ignition switch is turned to OFF while MAIN switch is ON
(“CRUISE” illumination is ON and vehicle-to-vehicle distance
control mode is ready for operation).
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ACS-12
< SERVICE INFORMATION >[ICC]
ACTION TEST
Check For RESUME/ACCELERATE, SET/COAST, CANCEL Switches
1. Check if RESUME/ACCELERA
TE, SET/COAST, CANCEL switches are operated smoothly.
2. Check if buttons come up as hand is released from the buttons.
Check For Distance Switch
1. Start engine.
2. Press the MAIN switch for less than 1.5 seconds.
3. Press the DISTANCE switch.
4. Check if the set distance indicator changes display in order of: (Long) →(Middle) →(Short).
NOTE:
The set distance indicator shows (Long) immediately after the engine starts.
CONVENTIONAL (FIXED SPEED) CRUISE CONTROL MODE
Set Checking
1. Press the MAIN switch for more than 1.5 seconds.
2. Drive the vehicle between 40 km/h (25 MPH) and 144 km/h (90 MPH).
3. Push down the SET/COAST switch.
4. Confirm that the desired speed is set as hand is released from the SET/COAST switch.
NOTE:
ICC system display in the combination meter shows nothing.
Check For Increase Of Cruising Speed
1. Set the conventional (fixed speed) cruise control mode at desired speed.
2. Check if the set speed increases by 1.6 km/h (1 MPH) as RESUME/ACCELERATE switch is pushed up.
NOTE:
 If the RESUME/ACCELERATE switch is kept pushing up during cruise control driving, the vehicle speed
increases until the switch is released.
 The maximum set speed is 144 km/h (90 MPH).
Check For Decrease Of Cruising Speed
1. Set the conventional (fixed speed) cruise control mode at desired speed.
2. Check if the set speed decreases by 1.6 km/h (1 MPH) as SET/COAST switch is pushed down.
NOTE:
 Conventional (fixed speed) cruise control mode is automatically turned off when the driving speed lowers to 32 km/h (20 MPH).
 The minimum set speed is 40 km/h (25 MPH).
Check For Cancellation Of Conventional (Fixed Speed) Cr uise Control Mode (Normal Driving Condition) In The Fol-
lowing Cases:
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ACTION TESTACS-13
< SERVICE INFORMATION > [ICC]
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Refer to "Check For Cancellation Of Vehicle-To-Vehicle Distance Control Mode (Normal Driving Condition) In
The Following Cases:".
Check For Restoring Speed That Is Set By Conventional (Fixed Speed) Cruise Control Mode Before ICC Cancella-
tion
Refer to "Check For Restoring Speed That Is Set By Vehicle-To-Vehicle Distance Control Mode Before Can-
cellation".
Check For MAIN Switch
1. Start engine. Then, check if the following operations are per- formed correctly.
2. “CRUISE” lamp illuminates and ICC system indicator goes off when MAIN switch is pressed “ON” for more than 1.5 seconds,
and then ready for operation. The illumination goes off when
MAIN switch is turned to OFF.
3. “CRUISE” illumination go off when the ignition switch is turned to OFF while MAIN switch is ON.
Check For RESUME/ACCELERATE, SET/COAST, CANCEL Switches
1. Check if RESUME/ACCELERATE, SET/COAST , CANCEL switches are operated smoothly.
2. Check if buttons come up as hand is released from the buttons.
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AT-1
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CONTENTS
AUTOMATIC TRANSMISSION
SERVICE INFORMATION .. ..........................5
INDEX FOR DTC ............................................ .....5
Alphabetical Index ............................................... ......5
DTC No. Index ..........................................................5
PRECAUTIONS ...................................................7
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" ............................................................. ......
7
Precaution for On Board Diagnosis (OBD) System
of A/T and Engine .....................................................
7
Precaution .................................................................7
Service Notice or Precaution .....................................8
PREPARATION ...................................................9
Special Service Tool ........................................... ......9
Commercial Service Tool ..........................................9
A/T FLUID ...........................................................11
Changing A/T Fluid ............................................. ....11
Checking A/T Fluid ..................................................11
A/T Fluid Cooler Cleaning .......................................13
A/T CONTROL SYSTEM ....................................16
Cross-Sectional View (2WD Models) .................. ....16
Cross-Sectional View (VQ35DE Models for AWD) ....17
Cross-Sectional View (VK45DE Models for AWD) ....18
Shift Mechanism .................................................. ....18
TCM Function ..........................................................29
CAN Communication ...............................................30
Input/Output Signal of TCM .....................................31
Line Pressure Control .............................................31
Shift Control ............................................................33
Lock-up Control .......................................................34
Engine Brake Control ..............................................35
Control Valve ...........................................................36
ON BOARD DIAGNOSTIC (OBD) SYSTEM ......38
Introduction ......................................................... ....38
OBD-II Function for A/T System ..............................38
One or Two Trip Detection Logic of OBD-II ............38
OBD-II Diagnostic Trouble Code (DTC) .............. ....38
Malfunction Indicator Lamp (MIL) ............................40
TROUBLE DIAGNOSIS ....................................41
DTC Inspection Priority Chart ..................................41
Fail-Safe ..................................................................41
How to Perform Trouble Diagnosis for Quick and
Accurate Repair .......................................................
42
A/T Electrical Parts Location ...................................48
Circuit Diagram ........................................................49
Inspections Before Trouble Diagnosis .....................49
Road Test ................................................................53
Vehicle Speed at Which Gear Shifting Occurs ........58
Vehicle Speed at Which Lock-up Occurs/Releas-
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Symptom Chart ........................................................59
TCM Input/Output Signal Reference Value .............83
CONSULT-III Function (TRANSMISSION) ..............84
Diagnosis Procedure without CONSULT-III ............91
DTC U1000 CAN COMMUNICATION LINE .....94
Description ........................................................... ....94
On Board Diagnosis Logic .......................................94
Possible Cause ........................................................94
DTC Confirmation Procedure ..................................94
Wiring Diagram - AT - CAN .....................................95
Diagnosis Procedure ...............................................96
DTC P0615 START SIGNAL CIRCUIT .............97
Description ...............................................................97
CONSULT-III Reference Value in Data Monitor
Mode ........................................................................
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On Board Diagnosis Logic .......................................97
Possible Cause ........................................................97
DTC Confirmation Procedure ..................................97
Wiring Diagram - AT - STSIG ..................................98
Diagnosis Procedure ...............................................99
DTC P0700 TCM .............................................101
Description .............................................................101
On Board Diagnosis Logic .....................................101
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AT-4
BRAKE SIGNAL CIRCUIT ..............................165
CONSULT-III Reference Value in Data Monitor
Mode .................................................................... ..
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Diagnosis Procedure .............................................165
A/T INDICATOR CIRCUIT ...............................166
Description ........................................................... ..166
CONSULT-III Reference Value in Data Monitor
Mode .................................................................... ..
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Diagnosis Procedure .............................................166
TROUBLE DIAGNOSIS FOR SYMPTOMS .....167
Wiring Diagram - AT - NONDTC .......................... ..167
A/T Check Indicator Lamp Does Not Come On .....170
Engine Cannot Be Started in "P" or "N" Position ...170
In "P" Position, Vehicle Moves When Pushed .......171
In "N" Position, Vehicle Moves ..............................172
Large Shock ("N" to "D" Position) ..........................173
Vehicle Does Not Creep Backward in "R" Position ..175
Vehicle Does Not Creep Forward in "D" Position ..178
Vehicle Cannot Be Started from D1 .......................180
A/T Does Not Shift: D1→ D2 ................................ ..182
A/T Does Not Shift: D2→ D3 ................................ ..184
A/T Does Not Shift: D3→ D4 ................................ ..186
A/T Does Not Shift: D4→ D5 ................................ ..188
A/T Does Not Lock-up ......................................... ..190
A/T Does Not Hold Lock-up Condition ...................192
Lock-up Is Not Released .......................................194
Engine Speed Does Not Return to Idle .................194
Cannot Be Changed to Manual Mode ...................195
A/T Does Not Shift: 5th Gear → 4th Gear ........... ..196
A/T Does Not Shift: 4th Gear → 3rd Gear ........... ..197
A/T Does Not Shift: 3rd Gear → 2nd Gear .......... ..199
A/T Does Not Shift: 2nd Gear → 1st Gear ........... ..201
Vehicle Does Not Decelerate by Engine Brake ... ..202
SHIFT CONTROL SYSTEM ............................205
Control Device Removal and Installation ............. ..205
Control Rod Removal and Installation ...................206
Adjustment of A/T Position ....................................207
Checking of A/T Position .......................................207
A/T SHIFT LOCK SYSTEM .............................208
Description ........................................................... ..208
Shift Lock System Electrical Parts Location ..........208
Wiring Diagram - AT - SHIFT .................................209
Diagnosis Procedure .............................................209
KEY INTERLOCK CABLE ...............................212
Component .......................................................... ..212
Removal and Installation .......................................212
ON-VEHICLE SERVICE ...................................215
Control Valve with TCM and A/T Fluid Tempera-
ture Sensor 2 ....................................................... .
215
Parking Component (2WD Models Only) ..............226
Rear Oil Seal .........................................................233
Revolution Sensor Component (2WD Models
Only) .....................................................................
233
AIR BREATHER HOSE ....................................239
Removal and Installation ...................................... .239
TRANSMISSION ASSEMBLY ..........................241
Removal and Installation (2WD Models) .............. .241
Removal and Installation (AWD Models) ..............243
OVERHAUL ......................................................249
Component .......................................................... .249
Oil Channel ...........................................................261
Location of Adjusting Shims, Needle Bearings,
Thrust Washers and Snap Rings ......................... .
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DISASSEMBLY .............................................. ..267
Disassembly ......................................................... .267
REPAIR FOR COMPONENT PARTS ..............285
Oil Pump .............................................................. .285
Front Sun Gear, 3rd One-Way Clutch ...................287
Front Carrier, Input Clutch, Rear Internal Gear .....289
Mid Sun Gear, Rear Sun Gear, High and Low Re-
verse Clutch Hub ..................................................
295
High and Low Reverse Clutch ..............................301
Direct Clutch .........................................................303
ASSEMBLY .................................................... ..306
Assembly (1) ........................................................ .306
Adjustment ............................................................320
Assembly (2) .........................................................323
SERVICE DATA AND SPECIFICATIONS
(SDS) ................................................................
330
General Specification ........................................... .330
Vehicle Speed at Which Gear Shifting Occurs .....330
Vehicle Speed at Which Lock-up Occurs/Releas-
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Stall Speed ............................................................331
Line Pressure ........................................................331
A/T Fluid Temperature Sensor ..............................332
Turbine Revolution Sensor ...................................332
Vehicle Speed Sensor A/T (Revolution Sensor) ...332
Reverse Brake ......................................................332
Total End Play .......................................................332
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A/T CONTROL SYSTEMAT-21
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 The same as for the “N” position, both the forward brake and the reverse brake are released, so torque from the input shaft drive is not transmitted to the output shaft.
 The parking pawl linked with the selector lever mes hes with the parking gear and fastens the output shaft
mechanically.
“D1” Position
 The forward brake and the forward one-way clutch regulate reverse rotation of the mid sun gear.
 The 1st one-way clutch regulates reverse rotation of the rear sun gear.
 The 3rd one-way clutch regulates reverse rotation of the front sun gear.
 During deceleration, the mid sun gear turns forwar d, so the forward one-way clutch idles and the engine
brake is not activated.
1. Front brake 2. Input clutch 3. Direct clutch
4. High and low reverse clutch 5. Reverse brake 6. Forward brake
7. Low coast brake 8. 1st one-way clutch 9. Forward one-way clutch
10. 3rd one-way clutch 11. Front sun gear 12. Input shaft
13. Mid internal gear 14. Front internal gear 15. Rear carrier
16. Rear sun gear 17. Mid sun gear 18. Front carrier
19. Mid carrier 20. Rear internal gear 21. Output shaft
22. Parking gear 23. Parking pawl
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