CVT-1
CVT
C TRANSMISSION/TRANSAXLE
CONTENTS
D
E
F
G
H
I
J
K
L
M
SECTION
A
B
CVT
Revision: 2006 July 2007 Murano
CVT
INDEX FOR DTC ........................................................ 6
Alphabetical Index .................................................... 6
DTC No. Index ......................................................... 7
PRECAUTIONS .......................................................... 8
Precautions for Supplemental Restraint System
(SRS) ?AIR BAG? and ?SEAT BELT PRE-TEN-
SIONER? .................................................................. 8
Precautions for Procedures without Cowl Top Cover ..... 8
Precautions Necessary for Steering Wheel Rotation
After Battery Disconnect .......................................... 8
OPERATION PROCEDURE ................................. 8
Precautions for On Board Diagnostic (OBD) System
of CVT and Engine ................................................... 9
Precautions for TCM and CVT Assembly Replace-
ment ......................................................................... 9
EEPROM ERASING PATTERNS .......................... 9
METHOD FOR ERASING THE EEPROM IN THE
TCM ...................................................................... 9
METHOD FOR WRITING DATA FROM THE
ROM ASSEMBLY IN THE TRANSAXLE ............ 10
CHECK METHOD ............................................... 10
Removal and Installation Procedure for CVT Unit
Connector ............................................................... 10
REMOVAL ........................................................... 10
INSTALLATION ................................................... 10
Precautions .............................................................11
Service Notice or Precautions ................................ 12
CVT FLUID COOLER SERVICE ......................... 12
OBD-II SELF-DIAGNOSIS .................................. 12
PREPARATION ......................................................... 13
Special Service Tools ............................................. 13
Commercial Service Tools ...................................... 14
CVT FLUID ............................................................... 15
Checking CVT Fluid ............................................... 15
FLUID LEVEL CHECK ........................................ 15
Changing CVT Fluid ............................................... 16
CVT Fluid Cooler Cleaning .................................... 17
CVT FLUID COOLER CLEANING PROCEDURE
... 17
CVT FLUID COOLER DIAGNOSIS PROCE-
DURE ..................................................................18
CVT FLUID COOLER INSPECTION PROCE-
DURE ..................................................................19
CVT FLUID COOLER FINAL INSPECTION ........19
CVT SYSTEM ............................................................20
Cross-sectional View - RE0F09A ...........................20
Control System .......................................................21
Hydraulic Control System .......................................22
TCM Function .........................................................23
CONTROL SYSTEM OUTLINE ..........................23
CONTROL SYSTEM DIAGRAM .........................23
CAN Communication ..............................................24
SYSTEM DESCRIPTION ....................................24
Input/Output Signal of TCM ....................................24
Line Pressure and Secondary Pressure Control ....25
NORMAL CONTROL ..........................................25
FEEDBACK CONTROL ......................................25
Shift Control ............................................................25
?D? POSITION .....................................................26
?S? POSITION (WITHOUT MANUAL MODE) ......26
?L? POSITION (WITHOUT MANUAL MODE) ......26
?M? POSITION .....................................................26
DOWNHILL ENGINE BRAKE CONTROL (AUTO
ENGINE BRAKE CONTROL) ..............................26
ACCELERATION CONTROL ..............................26
Lock-up and Select Control ....................................27
TORQUE CONVERTER CLUTCH AND SELECT
CONTROL VALVE CONTROL ............................27
Control Valve ..........................................................28
FUNCTION OF CONTROL VALVE .....................28
ON BOARD DIAGNOSTIC (OBD) SYSTEM ............29
Introduction .............................................................29
OBD-II Function for CVT System ...........................29
One or Two Trip Detection Logic of OBD-II ............29
ONE TRIP DETECTION LOGIC .........................29
TWO TRIP DETECTION LOGIC .........................29
OBD-II Diagnostic Trouble Code (DTC) .................29
HOW TO READ DTC AND 1ST TRIP DTC .........29
HOW TO ERASE DTC ........................................30
HOW TO ERASE DTC (WITH CONSULT-II) ....... 31