control INFINITI M35 2007 Factory Owner's Guide

AT-1
AUTOMATIC TRANSMISSION
C TRANSMISSION/TRANSAXLE
CONTENTS
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Revision: 2007 April2007 M35/M45
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 ...................................... 14
A/T CONTROL SYSTEM .......................................... 17
Cross-Sectional View (VQ35DE Models for 2WD) ... 17
Cross-Sectional View (VK45DE Models for 2WD) ... 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 ...................................................... 37
Engine Brake Control ............................................. 38
Control Valve .......................................................... 38
ON BOARD DIAGNOSTIC (OBD) SYSTEM ............ 40
Introduction ............................................................ 40
OBD-II Function for A/T System ............................. 40
One or Two Trip Detection Logic of OBD-II ............ 40
OBD-II Diagnostic Trouble Code (DTC) ................. 40
Malfunction Indicator Lamp (MIL) ........................... 43
TROUBLE DIAGNOSIS ............................................ 44
DTC Inspection Priority Chart ................................ 44
Fail-safe ................................................................. 44How to Perform Trouble Diagnosis for Quick and
Accurate Repair ...................................................... 46
A/T Electrical Parts Location .................................. 51
Circuit Diagram ....................................................... 52
Inspections before Trouble Diagnosis .................... 53
Check before Engine Is Started .............................. 57
Check at Idle ........................................................... 57
Cruise Test - Part 1 ................................................. 59
Cruise Test - Part 2 ................................................. 61
Cruise Test - Part 3 ................................................. 61
Vehicle Speed at Which Gear Shifting Occurs ....... 63
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 ............105
Description ............................................................105
On Board Diagnosis Logic ....................................105
Possible Cause .....................................................105
DTC Confirmation Procedure ...............................105
Wiring Diagram — AT — CAN ..............................106
Diagnostic Procedure ...........................................107
DTC P0615 START SIGNAL CIRCUIT ...................108
Description ............................................................108
CONSULT-II Reference Value ..............................108
On Board Diagnosis Logic ....................................108
Possible Cause .....................................................108
DTC Confirmation Procedure ...............................108
Wiring Diagram — AT — STSIG ..........................109
Diagnostic Procedure ...........................................110
DTC P0700 TCM .....................................................112
Description ............................................................112
On Board Diagnosis Logic ....................................112
Possible Cause .....................................................112
DTC Confirmation Procedure ...............................112
Diagnostic Procedure ...........................................112
DTC P0705 PARK/NEUTRAL POSITION SWITCH .113
Description ............................................................113
CONSULT-II Reference Value ..............................113

AT-4Revision: 2007 April2007 M35/M45 A/T Does Not Shift: 4th Gear → 3rd Gear ............215
A/T Does Not Shift: 3rd Gear → 2nd Gear ...........217
A/T Does Not Shift: 2nd Gear → 1st Gear ............218
Vehicle Does Not Decelerate by Engine Brake ....220
SHIFT CONTROL SYSTEM ....................................222
Control Device Removal and Installation ..............222
Control Rod Removal and Installation ..................226
Adjustment of A/T Position ...................................227
Checking of A/T Position ......................................228
A/T SHIFT LOCK SYSTEM .....................................229
Description ............................................................229
Shift Lock System Electrical Parts Location .........229
Wiring Diagram — AT — SHIFT ...........................230
Diagnostic Procedure ...........................................232
ON-VEHICLE SERVICE ..........................................236
Control Valve With TCM and A/T Fluid Temperature
Sensor 2 ...............................................................236
Parking Components (2WD Models Only) ............250
Rear Oil Seal (VQ35DE Models Only) ..................262
Revolution Sensor Components (2WD Models
Only) .....................................................................263
AIR BREATHER HOSE ...........................................272
Removal and Installation ......................................272
TRANSMISSION ASSEMBLY ................................274
Removal and Installation (2WD Models) ..............274
Removal and Installation (AWD Models) ..............278
OVERHAUL .............................................................281
Components .........................................................281Oil Channel ...........................................................295
Locations of Adjusting Shims, Needle Bearings,
Thrust Washers and Snap Rings ..........................298
DISASSEMBLY .......................................................301
Disassembly ..........................................................301
REPAIR FOR COMPONENT PARTS ......................322
Oil Pump ...............................................................322
Front Sun Gear, 3rd One-Way Clutch ...................325
Front Carrier, Input Clutch, Rear Internal Gear .....327
Mid Sun Gear, Rear Sun Gear, High and Low
Reverse Clutch Hub ..............................................333
High and Low Reverse Clutch ..............................339
Direct Clutch .........................................................341
ASSEMBLY .............................................................344
Assembly (1) .........................................................344
Adjustment ............................................................360
Assembly (2) .........................................................362
SERVICE DATA AND SPECIFICATIONS (SDS) ....370
General Specifications ..........................................370
Vehicle Speed at Which Gear Shifting Occurs ......370
Vehicle Speed at Which Lock-Up Occurs/Releases .371
Stall Speed ............................................................371
Line Pressure ........................................................371
A/T Fluid Temperature Sensor ..............................371
Turbine Revolution Sensor ....................................372
Vehicle Speed Sensor A/T (Revolution Sensor) ...372
Reverse Brake ......................................................372
Total End Play .......................................................372

A/T CONTROL SYSTEM
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A/T CONTROL SYSTEMPFP:31036
Cross-Sectional View (VQ35DE Models for 2WD)NCS001JL
1. Front planetary gear 2. Mid planetary gear 3. Rear planetary gear
4. Direct clutch 5. High and low reverse clutch 6. Reverse brake
7. Drum support 8. Forward brake 9. Low coast brake
10. Input shaft 11. Torque converter 12. Oil pump
13. 3rd one-way clutch 14. Front brake 15. Input clutch
16. 1st one-way clutch 17. Control valve with TCM 18. Forward one-way clutch
19. Rear extension 20. Output shaft
SCIA6946E

AT-18
A/T CONTROL SYSTEM
Revision: 2007 April2007 M35/M45
Cross-Sectional View (VK45DE Models for 2WD)NCS001JM
1. Front planetary gear 2. Mid planetary gear 3. Rear planetary gear
4. Direct clutch 5. High and low reverse clutch 6. Reverse brake
7. Drum support 8. Forward brake 9. Low coast brake
10. Input shaft 11. Torque converter 12. Oil pump
13. 3rd one-way clutch 14. Front brake 15. Input clutch
16. 1st one-way clutch 17. Control valve with TCM 18. Forward one-way clutch
19. Rear extension 20. Intermediate shaft 21. Output shaft
22. Companion flange
SCIA6948E

A/T CONTROL SYSTEM
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Cross-Sectional View (AWD Models)NCS001JN
1. Front planetary gear 2. Mid planetary gear 3. Rear planetary gear
4. Direct clutch 5. High and low reverse clutch 6. Reverse brake
7. Drum support 8. Forward brake 9. Low coast brake
10. Input shaft 11. Torque converter 12. Oil pump
13. 3rd one-way clutch 14. Front brake 15. Input clutch
16. 1st one-way clutch 17. Control valve with TCM 18. Forward one-way clutch
19. Adapter case 20. Output shaft
SCIA6947E

AT-20
A/T CONTROL SYSTEM
Revision: 2007 April2007 M35/M45
Shift MechanismNCS001JO
The A/T uses compact triple planetary gear systems to improve power transmission efficiency, simplify con-
struction and reduce weight.
It also employs an optimum shift control and super wide gear ratios. They improve starting performance and
acceleration during medium and high-speed operation.
CONSTRUCTION
FUNCTION OF CLUTCH AND BRAKE
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
PCIA0002J
Name of the Part Abbreviation Function
Front brake (1) FR/B Fastens the front sun gear (11).
Input clutch (2) I/CConnects the input shaft (12), the front internal gear (14) and the mid internal
gear (13).
Direct clutch (3) D/C Connects the rear carrier (15) and the rear sun gear (16).
High and low reverse clutch (4) HLR/C Connects the mid sun gear (17) and the rear sun gear (16).
Reverse brake (5) R/B Fastens the rear carrier (15).
Forward brake (6) Fwd/B Fastens the mid sun gear (17).
Low coast brake (7) LC/B Fastens the mid sun gear (17).
1st one-way clutch (8) 1st OWCAllows the rear sun gear (16) to turn freely forward relative to the mid sun gear
(17) but fastens it for reverse rotation.
Forward one-way clutch (9) Fwd OWCAllows the mid sun gear (17) to turn freely in the forward direction but fastens it
for reverse rotation.
3rd one-way clutch (10) 3rd OWCAllows the front sun gear (11) to turn freely in the forward direction but fastens
it for reverse rotation.

A/T CONTROL SYSTEM
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CLUTCH AND BAND CHART
SCIA6962E

AT-22
A/T CONTROL SYSTEM
Revision: 2007 April2007 M35/M45
POWER TRANSMISSION
“N” Position
Since both the forward brake and the reverse brake are released, torque from the input shaft drive is not trans-
mitted to the output shaft.
“P” Position

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 meshes with the parking gear and fastens the output shaft
mechanically.
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
PCIA0003J

A/T CONTROL SYSTEM
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“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 forward, 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
SCIA1512E

AT-24
A/T CONTROL SYSTEM
Revision: 2007 April2007 M35/M45
“M1” Position

The front brake fastens the front sun gear.

The forward brake and the forward one-way clutch regulate reverse rotation of the mid sun gear.

High and low reverse clutch connects the rear sun gear and the mid sun gear.

The low coast brake fastens the mid sun gear.

During deceleration, the low coast brake regulates forward rotation of the mid sun gear and the engine
brake functions.
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
SCIA1513E