Idle air control valve INFINITI FX35 2005 Service Manual

AT-1
AUTOMATIC TRANSMISSION
C TRANSMISSION/TRANSAXLE
CONTENTS
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Revision: 2005 July 2005 FX
AUTOMATIC TRANSMISSION
INDEX FOR DTC ........................................................ 5
Alphabetical Index ............................................... ..... 5
DTC No. Index .................................................... ..... 6
PRECAUTIONS ..................................................... ..... 7
Precautions for Supplemental Restraint System
(SRS) “AIR BAG” and “SEAT BELT PRE-TEN-
SIONER” ............................................................. ..... 7
Precautions for On Board Diagnostic (OBD) System
of A/T and Engine ............................................... ..... 7
Precautions ......................................................... ..... 8
Service Notice or Precautions ............................. ..... 9
PREPARATION ...................................................... ... 10
Special Service Tools .......................................... ... 10
Commercial Service Tools ................................... .... 11
A/T FLUID .............................................................. ... 12
Changing A/T Fluid ............................................. ... 12
Checking A/T Fluid .............................................. ... 13
A/T Fluid Cooler Cleaning ................................... ... 15
A/T CONTROL SYSTEM ....................................... ... 18
Cross-Sectional View (2WD Models) .................. ... 18
Cross-Sectional View (AWD Models) .................. ... 19
Shift Mechanism .................................................. ... 20
TCM Function ...................................................... ... 31
CAN Communication ........................................... ... 32
Input/Output Signal of TCM ................................. ... 32
Line Pressure Control ......................................... ... 33
Shift Control ........................................................ ... 34
Lock-up Control ................................................... ... 35
Engine Brake Control .......................................... ... 36
Control Valve ....................................................... ... 37
ON BOARD DIAGNOSTIC (OBD) SYSTEM ......... ... 39
Introduction ......................................................... ... 39
OBD-II Function for A/T System .......................... ... 39
One or Two Trip Detection Logic of OBD-II ......... ... 39
OBD-II Diagnostic Trouble Code (DTC) .............. ... 39
Malfunction Indicator Lamp (MIL) ........................ ... 42
TROUBLE DIAGNOSIS ......................................... ... 43
DTC Inspection Priority Chart ............................. ... 43
Fail-safe .............................................................. ... 43
How to Perform Trouble Diagnosis for Quick and Accurate Repair ...................................................
... 45
A/T Electrical Parts Location ............................... ... 50
Circuit Diagram .................................................... ... 51
Inspections Before Trouble Diagnosis ................. ... 52
Check Before Engine Is Started .......................... ... 56
Check at Idle ........................................................ ... 57
Cruise Test - Part 1 .............................................. ... 58
Cruise Test - Part 2 .............................................. ... 60
Cruise Test - Part 3 .............................................. ... 61
Vehicle Speed at Which Gear Shifting Occurs .... ... 62
Vehicle Speed at Which Lock-up Occurs/Releases ... 63
Symptom Chart .................................................... ... 64
TCM Input/Output Signal Reference Values ........ ... 89
CONSULT-II Function (A/T) ................................. ... 90
Diagnostic Procedure without CONSULT-II ......... .103
DTC U1000 CAN COMMUNICATION LINE ........... .106
Description ........................................................... .106
On Board Diagnosis Logic ................................... .106
Possible Cause .................................................... .106
DTC Confirmation Procedure .............................. .106
Wiring Diagram — AT — CAN ............................. .107
Diagnostic Procedure .......................................... .108
DTC P0615 START SIGNAL CIRCUIT .................. .109
Description ........................................................... .109
CONSULT-II Reference Value ............................. .109
On Board Diagnosis Logic ................................... .109
Possible Cause .................................................... .109
DTC Confirmation Procedure .............................. .109
Wiring Diagram — AT — STSIG ......................... .110
Diagnostic Procedure .......................................... ..111
DTC P0700 TCM .................................................... .113
Description ........................................................... .113
On Board Diagnosis Logic ................................... .113
Possible Cause .................................................... .113
DTC Confirmation Procedure .............................. .113
Diagnostic Procedure .......................................... .113
DTC P0705 PARK/NEUTRAL POSITION SWITCH .114
Description ........................................................... .114
CONSULT-II Reference Value ............................. .114
On Board Diagnosis Logic ................................... .114

AT-4Revision: 2005 July 2005 FX
In “N” Position, Vehicle Moves .............................
.196
Large Shock (“N” to “D” Position) ........................ .197
Vehicle Does Not Creep Backward in “R” Position .200
Vehicle Does Not Creep Forward in “D” Position . .203
Vehicle Cannot Be Started from D
1 ..................... .205
A/T Does Not Shift: D
1 → D2 ............................... .208
A/T Does Not Shift: D
2 → D3 ............................... .210
A/T Does Not Shift: D
3 → D4 ............................... .212
A/T Does Not Shift: D
4 → D5 ............................... .215
A/T Does Not Perform Lock-up ........................... .217
A/T Does Not Hold Lock-up Condition ................. .219
Lock-up Is Not Released ..................................... .221
Engine Speed Does Not Return to Idle ............... .221
Cannot Be Changed to Manual Mode ................. .223
A/T Does Not Shift: 5th Gear → 4th Gear ........... .223
A/T Does Not Shift: 4th Gear → 3rd Gear ........... .225
A/T Does Not Shift: 3rd Gear → 2nd Gear .......... .227
A/T Does Not Shift: 2nd Gear → 1st Gear ........... .229
Vehicle Does Not Decelerate by Engine Brake ... .231
SHIFT CONTROL SYSTEM ................................... .233
Control Device Removal and Installation ............. .233
Control Rod Removal and Installation ................. .234
Adjustment of A/T Position .................................. .235
Checking of A/T Position ..................................... .235
A/T SHIFT LOCK SYSTEM .................................... .236
Description ........................................................... .236
Shift Lock System Electrical Parts Location ........ .236
Wiring Diagram — AT — SHIFT .......................... .237
Diagnostic Procedure .......................................... .238
KEY INTERLOCK CABLE ..................................... .240
Components ........................................................ .240
Removal and Installation ..................................... .241
ON-VEHICLE SERVICE ......................................... .243
Control Valve with TCM and A/T Fluid Temperature
Sensor 2 .............................................................. .243
Parking Components (2WD Models Only) ........... .255
Rear Oil Seal ....................................................... .262
Revolution Sensor Components (2WD Models Only) ....................................................................
.263
AIR BREATHER HOSE .......................................... .268
Removal and Installation ...................................... .268
TRANSMISSION ASSEMBLY ................................ .270
Removal and Installation (2WD Models) .............. .270
Removal and Installation (AWD Models) ............. .273
OVERHAUL ............................................................ .278
Components ......................................................... .278
Oil Channel .......................................................... .286
Locations of Adjusting Shims, Needle Bearings,
Thrust Washers and Snap Rings ......................... .288
DISASSEMBLY ...................................................... .290
Disassembly ......................................................... .290
REPAIR FOR COMPONENT PARTS ..................... .308
Oil Pump .............................................................. .308
Front Sun Gear, 3rd One-way Clutch ................... .311
Front Carrier, Input Clutch, Rear Internal Gear .... .313
Mid Sun Gear, Rear Sun Gear, High and Low
Reverse Clutch Hub ............................................. .318
High and Low Reverse Clutch ............................. .323
Direct Clutch ........................................................ .326
ASSEMBLY ............................................................ .328
Assembly (1) ........................................................ .328
Adjustment ........................................................... .341
Assembly (2) ........................................................ .344
SERVICE DATA AND SPECIFICATIONS (SDS) ... .351
General Specifications ......................................... .351
Vehicle Speed at Which Gear Shifting Occurs ..... .351
Vehicle Speed at Which Lock-up Occurs/Releases .352
Stall Speed ........................................................... .352
Line Pressure ....................................................... .352
A/T Fluid Temperature Sensor ............................. .352
Turbine Revolution Sensor ................................... .353
Vehicle Speed Sensor A/T (Revolution Sensor) .. .353
Reverse Brake ..................................................... .353
Total End Play ...................................................... .353

DTC P0700 TCM AT-113
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Revision: 2005 July 2005 FX
DTC P0700 TCMPFP:31036
DescriptionACS006DU
The TCM consists of a microcomputer and connectors for signal input and output and for power supply. The
TCM controls the A/T.
On Board Diagnosis LogicACS006DV

This is an OBD-II self-diagnostic item.

Diagnostic trouble code “P0700* TCM” with CONSULT-II is detected when TCM is malfunctioning.
*: For VQ35DE engine.
Possible CauseACS006DW
TCM.
DTC Confirmation ProcedureACS006DX
NOTE:
If “DTC Confirmation Procedure” has been previously performed, always turn ignition switch OFF and
wait at least 10 seconds before performing the next test.
After the repair, perform the following procedure to confirm the malfunction is eliminated.
WITH CONSULT-II
1. Turn ignition switch ON. (Do not start engine.)
2. Select “ECU INPUT SIGNALS” or “MAIN SIGNALS” in “DATA MONITOR” mode for “A/T” with CONSULT-II.
3. Start engine.
4. Run engine for at least 2 consecutive seconds at idle speed.
5. If DTC is detected, go to AT- 11 3 , "
Diagnostic Procedure" .
WITH GST
Follow the procedure “WITH CONSULT-II”.
Diagnostic ProcedureACS006DY
1. CHECK DTC
With CONSULT-II
1. Turn ignition switch ON. (Do not start engine.)
2. Select “SELF DIAG RESULTS” mode for “A/T” with CONSULT-II.
3. Touch “ERASE”.
4. Turn ignition switch OFF and wait at least 10 seconds.
5. Perform DTC confirmation procedure, AT- 11 3 , "
DTC Confirmation Procedure" .
Is the
“P0700 TCM” displayed again?
YES >> Replace the control valve with TCM. Refer to AT- 2 4 3 , "Control Valve with TCM and A/T Fluid Tem-
perature Sensor 2" .
NO >> INSPECTION END
BCIA0031E

DTC P1702 TRANSMISSION CONTROL MODULE (RAM) AT-131
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Revision: 2005 July 2005 FX
DTC P1702 TRANSMISSION CONTROL MODULE (RAM)PFP:31036
DescriptionACS002NL
The TCM consists of a microcomputer and connectors for signal input and output and for power supply. The
TCM controls the A/T.
On Board Diagnosis LogicACS002NM

This is not an OBD-II self-diagnostic item.

Diagnostic trouble code “P1702 TCM·RAM” with CONSULT-II is detected when TCM memory RAM is
malfunctioning.
Possible CauseACS002NN

TCM
DTC Confirmation ProcedureACS002NO
NOTE:
If “DTC Confirmation Procedure” has been previously performed, always turn ignition switch OFF and
wait at least 10 seconds before performing the next test.
After the repair, perform the following procedure to confirm the malfunction is eliminated.
WITH CONSULT-II
1. Turn ignition switch ON. (Do not start engine.)
2. Select “ECU INPUT SIGNALS” or “MAIN SIGNALS” in “DATA MONITOR” mode for “A/T” with CONSULT-II.
3. Touch “START”.
4. Start engine.
5. Run engine for at least 2 consecutive seconds at idle speed.
6. If DTC is detected, go to AT- 1 3 1 , "
Diagnostic Procedure" .
Diagnostic ProcedureACS002NP
1. CHECK DTC
With CONSULT-II
1. Turn ignition switch ON. (Do not start engine.)
2. Select “SELF DIAG RESULTS” mode for “A/T” with CONSULT-II.
3. Touch “ERASE”.
4. Turn ignition switch OFF and wait at least 10 seconds.
5. Perform “DTC confirmation procedure”. Refer to AT- 1 3 1 , "
DTC Confirmation Procedure" .
Is the
“P1702 TCM·RAM” displayed again?
YES >> Replace the control valve with TCM. Refer to AT- 2 4 3 , "Control Valve with TCM and A/T Fluid Tem-
perature Sensor 2" .
NO >> INSPECTION END
BCIA0031E

AT-132
DTC P1703 TRANSMISSION CONTROL MODULE (ROM)
Revision: 2005 July 2005 FX
DTC P1703 TRANSMISSION CONTROL MODULE (ROM)PFP:31036
DescriptionACS002NQ
The TCM consists of a microcomputer and connectors for signal input and output and for power supply. The
TCM controls the A/T.
On Board Diagnosis LogicACS002NR

This is not an OBD-II self-diagnostic item.

Diagnostic trouble code “P1703 TCM·ROM” with CONSULT-II is detected when TCM memory ROM is
malfunctioning.
Possible CauseACS002NS

TCM
DTC Confirmation ProcedureACS002NT
NOTE:
If “DTC Confirmation Procedure” has been previously performed, always turn ignition switch OFF and
wait at least 10 seconds before performing the next test.
After the repair, perform the following procedure to confirm the malfunction is eliminated.
WITH CONSULT-II
1. Turn ignition switch to ON. (Do not start engine.)
2. Select “ECU INPUT SIGNALS” or “MAIN SIGNALS” in “DATA MONITOR” mode for A/T with CONSULT-II.
3. Touch “START”.
4. Start engine.
5. Run engine for at least 2 consecutive seconds at idle speed.
6. If DTC is detected, go to AT- 1 3 2 , "
Diagnostic Procedure" .
Diagnostic ProcedureACS002NU
1. CHECK DTC
With CONSULT-II
1. Turn ignition switch ON. (Do not start engine.)
2. Select “SELF DIAG RESULTS” mode for “A/T” with CONSULT-II.
3. Touch “ERASE”.
4. Turn ignition switch OFF and wait at least 10 seconds.
5. Perform “DTC confirmation procedure”, AT- 1 3 2 , "
DTC Confirmation Procedure" .
Is the
“P1703 TCM·ROM” displayed again?
YES >> Replace the control valve with TCM. Refer to AT- 2 4 3 , "Control Valve with TCM and A/T Fluid Tem-
perature Sensor 2" .
NO >> INSPECTION END
BCIA0031E

AT-198
TROUBLE DIAGNOSIS FOR SYMPTOMS
Revision: 2005 July 2005 FX
4. CHECK A/T FLUID LEVEL
Check the A/T fluid level. Refer to AT- 1 3 , "
Checking A/T Fluid" .
OK or NG
OK >> GO TO 5.
NG >> Refill ATF.
5. CHECK LINE PRESSURE
Check line pressure at idle with selector lever in “D” position. Refer
to AT- 5 4 , "
LINE PRESSURE TEST" .
OK or NG
OK >> GO TO 8.
NG - 1 >> Line pressure high: GO TO 6.
NG - 2 >> Line pressure low: GO TO 7.
6. DETECT MALFUNCTIONING ITEM
1. Check control valve with TCM. Refer to AT- 2 4 3 , "
Control Valve with TCM and A/T Fluid Temperature Sen-
sor 2" .
2. Disassemble A/T. Refer to AT- 2 9 0 , "
DISASSEMBLY" .
3. Check the following.
–Oil pump assembly. Refer to AT- 3 0 8 , "Oil Pump" .
OK or NG
OK >> GO TO 8.
NG >> Repair or replace damaged parts.
7. DETECT MALFUNCTIONING ITEM
1. Check control valve with TCM. Refer to AT- 2 4 3 , "
Control Valve with TCM and A/T Fluid Temperature Sen-
sor 2" .
2. Disassemble A/T. Refer to AT- 2 9 0 , "
DISASSEMBLY" .
3. Check the following.
–Oil pump assembly. Refer to AT- 3 0 8 , "Oil Pump" .
–Power train system. Refer to AT- 2 9 0 , "DISASSEMBLY" .
–Transmission case. Refer to AT- 2 9 0 , "DISASSEMBLY" .
OK or NG
OK >> GO TO 8.
NG >> Repair or replace damaged parts.
SAT638A
SAT494G

TROUBLE DIAGNOSIS FOR SYMPTOMS AT-199
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Revision: 2005 July 2005 FX
8. CHECK A/T FLUID CONDITION
1. Remove oil pan. Refer to AT- 2 4 3 , "
Control Valve with TCM and A/T Fluid Temperature Sensor 2" .
2. Check A/T fluid condition. Refer to AT- 5 2 , "
A/T Fluid Condition
Check" .
OK or NG
OK >> GO TO 10.
NG >> GO TO 9.
9. DETECT MALFUNCTIONING ITEM

Check the malfunction items. If any items are damaged, repair or replace damaged parts. Refer to AT- 6 4 ,
"Symptom Chart" (Symptom No.1).
OK or NG
OK >> GO TO 10.
NG >> Repair or replace damaged parts.
10. CHECK SYMPTOM
Check again. Refer to AT- 5 7 , "
Check at Idle" .
OK or NG
OK >> INSPECTION END
NG >> GO TO 11.
11 . CHECK TCM
1. Check TCM input/output signals. Refer to AT- 8 9 , "
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.
SCIA5199E

AT-202
TROUBLE DIAGNOSIS FOR SYMPTOMS
Revision: 2005 July 2005 FX
9. CHECK A/T FLUID CONDITION
1. Remove oil pan. Refer to AT- 2 4 3 , "
Control Valve with TCM and A/T Fluid Temperature Sensor 2" .
2. Check A/T fluid condition. Refer to AT- 5 2 , "
A/T Fluid Condition
Check" .
OK or NG
OK >> GO TO 10.
NG >> GO TO 13.
10. DETECT MALFUNCTIONING ITEM

Check the malfunction items. If any items are damaged, repair or replace damaged parts. Refer to AT- 6 4 ,
"Symptom Chart" (Symptom No.43).
OK or NG
OK >> GO TO 11.
NG >> Repair or replace damaged parts.
11 . CHECK SYMPTOM
Check again. Refer to AT- 5 7 , "
Check at Idle" .
OK or NG
OK >> INSPECTION END
NG >> GO TO 12.
12. CHECK TCM
1. Check TCM input/output signals. Refer to AT- 8 9 , "
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.
13. DETECT MALFUNCTIONING ITEM

Check the malfunction items. If any items are damaged, repair or replace damaged parts. Refer to AT- 6 4 ,
"Symptom Chart" (Symptom No.43).
OK or NG
OK >> GO TO 11.
NG >> Repair or replace damaged parts.
SCIA5199E

AT-204
TROUBLE DIAGNOSIS FOR SYMPTOMS
Revision: 2005 July 2005 FX
5. CHECK LINE PRESSURE
Check line pressure at idle with selector lever in “D” position. Refer
to AT- 5 4 , "
LINE PRESSURE TEST" .
OK or NG
OK >> GO TO 8.
NG - 1 >> Line pressure high: GO TO 6.
NG - 2 >> Line pressure low: GO TO 7.
6. DETECT MALFUNCTIONING ITEM
1. Check control valve with TCM. Refer to AT- 2 4 3 , "
Control Valve with TCM and A/T Fluid Temperature Sen-
sor 2" .
2. Disassemble A/T. Refer to AT- 2 9 0 , "
DISASSEMBLY" .
3. Check the following.
–Oil pump assembly. Refer to AT- 3 0 8 , "Oil Pump" .
OK or NG
OK >> GO TO 8.
NG >> Repair or replace damaged parts.
7. DETECT MALFUNCTIONING ITEM
1. Check control valve with TCM. Refer to AT- 2 4 3 , "
Control Valve with TCM and A/T Fluid Temperature Sen-
sor 2" .
2. Disassemble A/T. Refer to AT- 2 9 0 , "
DISASSEMBLY" .
3. Check the following.
–Oil pump assembly. Refer to AT- 3 0 8 , "Oil Pump" .
–Power train system. Refer to AT- 2 9 0 , "DISASSEMBLY" .
–Transmission case. Refer to AT- 2 9 0 , "DISASSEMBLY" .
OK or NG
OK >> GO TO 8.
NG >> Repair or replace damaged parts.
8. CHECK A/T FLUID CONDITION
1. Remove oil pan. Refer to AT- 2 4 3 , "
Control Valve with TCM and A/T Fluid Temperature Sensor 2" .
2. Check A/T fluid condition. Refer to AT- 5 2 , "
A/T Fluid Condition
Check" .
OK or NG
OK >> GO TO 9.
NG >> GO TO 12.
SAT494G
SCIA5199E

EC-1
ENGINE CONTROL SYSTEM
B ENGINE
CONTENTS
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SECTION EC
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Revision: 2005 July 2005 FX
ENGINE CONTROL SYSTEM
VQ35DE
INDEX FOR DTC ...................................................... 15
DTC No. Index .................................................... ... 15
Alphabetical Index ............................................... ... 19
PRECAUTIONS ..................................................... ... 23
Precautions for Supplemental Restraint System
(SRS) “AIR BAG” and “SEAT BELT PRE-TEN-
SIONER” ............................................................. ... 23
On Board Diagnostic (OBD) System of Engine and
A/T ....................................................................... ... 23
Precaution ........................................................... ... 23
PREPARATION ...................................................... ... 27
Special Service Tools .......................................... ... 27
Commercial Service Tools ................................... ... 29
ENGINE CONTROL SYSTEM ............................... ... 30
System Diagram .................................................. ... 30
Multiport Fuel Injection (MFI) System ................. ... 31
Electronic Ignition (EI) System ............................ ... 33
Fuel Cut Control (at No Load and High Engine
Speed) ................................................................. ... 34
AIR CONDITIONING CUT CONTROL .................. ... 35
Input/Output Signal Chart .................................... ... 35
System Description ............................................. ... 35
AUTOMATIC SPEED CONTROL DEVICE (ASCD) ... 36
System Description ............................................. ... 36
Component Description ....................................... ... 37
CAN COMMUNICATION ....................................... ... 38
System Description ............................................. ... 38
EVAPORATIVE EMISSION SYSTEM .................... ... 39
Description .......................................................... ... 39
Component Inspection ........................................ ... 42
Removal and Installation ..................................... ... 43
How to Detect Fuel Vapor Leakage .................... ... 43
ON BOARD REFUELING VAPOR RECOVERY
(ORVR) ................................................................... ... 46
System Description ............................................. ... 46
Diagnostic Procedure .......................................... ... 47
Component Inspection ........................................ ... 49 POSITIVE CRANKCASE VENTILATION ..............
... 51
Description ........................................................... ... 51
Component Inspection ......................................... ... 51
IVIS (INFINITI VEHICLE IMMOBILIZER SYSTEM-
NATS) ..................................................................... ... 53
Description ........................................................... ... 53
ON BOARD DIAGNOSTIC (OBD) SYSTEM ......... ... 54
Introduction .......................................................... ... 54
Two Trip Detection Logic ..................................... ... 54
Emission-Related Diagnostic Information ............ ... 55
Malfunction Indicator Lamp (MIL) ........................ ... 69
OBD System Operation Chart ............................. ... 72
BASIC SERVICE PROCEDURE ............................ ... 78
Basic Inspection .................................................. ... 78
Idle Speed and Ignition Timing Check ................. ... 83
Idle Mixture Ratio Adjustment .............................. ... 85
VIN Registration .................................................. ... 96
Accelerator Pedal Released Position Learning ... ... 96
Throttle Valve Closed Position Learning .............. ... 96
Idle Air Volume Learning ..................................... ... 97
Fuel Pressure Check ........................................... ... 99
TROUBLE DIAGNOSIS ......................................... .101
Trouble Diagnosis Introduction ............................ .101
DTC Inspection Priority Chart .............................. .107
Fail-Safe Chart .................................................... .109
Symptom Matrix Chart ......................................... .110
Engine Control Component Parts Location ......... .114
Vacuum Hose Drawing ........................................ .120
Circuit Diagram .................................................... .121
ECM Harness Connector Terminal Layout .......... .123
ECM Terminals and Reference Value .................. .123
CONSULT-II Function (ENGINE) ......................... .132
Generic Scan Tool (GST) Function ...................... .144
CONSULT-II Reference Value in Data Monitor .... .147
Major Sensor Reference Graph in Data Monitor
Mode .................................................................... .151
TROUBLE DIAGNOSIS - SPECIFICATION VALUE .153
Description ........................................................... .153
Testing Condition ................................................. .153