Nissan Murano Z50 (2003 year). Manual — part 62
CVT SYSTEM
CVT-33
D
E
F
G
H
I
J
K
L
M
A
B
CVT
Revision; 2004 April
2003 Murano
Input/Output Signal Chart
T: Transmit R: Receive
Signals
ECM
TCM
Low
tire
pres-
sure
warn-
ing
con-
trol
unit
Dis-
play
unit
Dis-
play
con-
trol
unit
BCM
Uni-
fied
meter
and A/
C
amp.
Driver
seat
con-
trol
unit
AWD
con-
trol
unit
ABS
actua-
tor
and
elec-
tric
unit
(con-
trol
unit)
IPDM
E/R
CVT position indicator signal
T
R
Second position signal
R
T
Second position indicator signal
T
R
Engine speed signal
T
R
R
R
R
R
R
Engine status signal
T
R
Engine coolant temperature signal
T
R
Accelerator pedal position signal
T
R
R
Closed throttle position signal
T
R
Wide open throttle position signal
T
R
Key switch signal
T
R
Ignition switch signal
T
R
R
P range signal
T
R
Stop lamp switch signal
R
T
R
Fuel consumption monitor signal
T
R
CVT self-diagnosis signal
R
T
ABS operation signal
R
R
T
Air conditioner switch signal
R
T
A/C compressor request signal
T
R
A/C compressor feedback signal
T
R
Blower fan motor switch signal
R
T
A/C control signal
T
T
R
R
R
T
Cooling fan speed request signal
T
R
Position lights request signal
T
R
R
Low beam request signal
T
R
Low beam status signal
R
T
High beam request signal
T
R
R
High beam status signal
R
T
Front fog lights request signal
T
R
Vehicle speed signal
R
R
R
T
R
R
R
R
T
R
Sleep request 1 signal
T
R
Sleep request 2 signal
T
R
Door switch signal
R
T
R
R
T
R
R
R
Key fob ID signal
T
R
Key fob door unlock signal
T
R
CVT-34
CVT SYSTEM
Revision; 2004 April
2003 Murano
Turn indicator signal
T
R
Seat belt buckle switch signal
R
T
Oil pressure switch signal
R
T
T
R
Buzzer output signal
T
R
Fuel level sensor signal
R
T
Fuel level low warning signal
R
R
T
Malfunction indicator lamp signal
T
R
ASCD SET lamp signal
T
R
ASCD CRUISE lamp signal
T
R
Input shaft revolution signal
R
T
Output shaft revolution signal
R
T
Front wiper request signal
T
R
Front wiper stop position signal
R
T
Rear window defogger switch signal
T
R
Rear window defogger control signal
R
R
R
T
Engine and CVT integrated control
signal
T
R
R
T
Hood switch signal
R
T
Theft warning horn request signal
T
R
Horn chirp signal
T
R
Tire pressure signal
T
R
Tire pressure data signal
T
R
R
ABS warning lamp signal
R
T
Brake warning lamp signal
R
T
System setting signal
T
T
R
AWD warning lamp signal
R
T
AWD lock indicator lamp signal
R
T
AWD lock switch signal
T
R
Parking brake switch signal
R
T
R
Signals
ECM
TCM
Low
tire
pres-
sure
warn-
ing
con-
trol
unit
Dis-
play
unit
Dis-
play
con-
trol
unit
BCM
Uni-
fied
meter
and A/
C
amp.
Driver
seat
con-
trol
unit
AWD
con-
trol
unit
ABS
actua-
tor
and
elec-
tric
unit
(con-
trol
unit)
IPDM
E/R
CVT SYSTEM
CVT-35
D
E
F
G
H
I
J
K
L
M
A
B
CVT
Revision; 2004 April
2003 Murano
TYPE 25/TYPE26/TYPE 27/TYPE 28/TYPE 29/TYPE 30/TYPE 31/TYPE 32
System Diagram
●
Type25
●
Type26
●
Type27
SKIA4926E
SKIA4927E
SKIA4928E
CVT-36
CVT SYSTEM
Revision; 2004 April
2003 Murano
●
Type28
●
Type29
●
Type30
SKIA4929E
SKIA4930E
SKIA4931E
CVT SYSTEM
CVT-37
D
E
F
G
H
I
J
K
L
M
A
B
CVT
Revision; 2004 April
2003 Murano
●
Type31
●
Type32
SKIA4932E
SKIA4933E
CVT-38
CVT SYSTEM
Revision; 2004 April
2003 Murano
Input/Output Signal Chart
T: Transmit R: Receive
Signals
ECM
TCM
Low
tire
pres-
sure
warn-
ing
con-
trol
unit
Dis-
play
unit
Dis-
play
con-
trol
unit
BCM
Uni-
fied
meter
and
A/C
amp.
Steer
ing
angle
sen-
sor
Drive
r seat
con-
trol
unit
AWD
con-
trol
unit
ABS
actu-
ator
and
elec-
tric
unit
(con-
trol
unit)
IPDM
E/R
Engine and CVT integrated control
signal
T
R
R
T
Second position signal
R
T
VDC operation signal
R
R
T
Stop lamp switch signal
R
T
R
Key switch signal
T
R
Ignition switch signal
T
R
R
P range signal
T
R
R
Closed throttle position signal
T
R
Wide open throttle position signal
T
R
Second position indicator signal
T
R
R
Engine speed signal
T
R
R
R
R
R
R
Engine status signal
T
R
Engine coolant temperature signal
T
R
Accelerator pedal position signal
T
R
R
R
Fuel consumption monitor signal
T
R
CVT self-diagnosis signal
R
T
Input shaft revolution signal
R
T
R
Output shaft revolution signal
R
T
R
Air conditioner switch signal
R
T
A/C compressor request signal
T
R
A/C compressor feedback signal
T
R
T
Blower fan motor switch signal
R
T
A/C control signal
T
T
R
R
R
T
Cooling fan speed request signal
T
R
Position lights request signal
T
R
R
Low beam request signal
T
R
Low beam status signal
R
T
High beam request signal
T
R
R
High beam status signal
R
T
Front fog lights request signal
T
R
Vehicle speed signal
R
R
R
T
R
R
R
R
T
R
Sleep request 1 signal
T
R
Sleep request 2 signal
T
R
CVT SYSTEM
CVT-39
D
E
F
G
H
I
J
K
L
M
A
B
CVT
Revision; 2004 April
2003 Murano
Door switch signal
R
T
R
R
T
R
R
R
Turn indicator signal
T
R
Key fob ID signal
T
R
Key fob door unlock signal
T
R
Seat belt buckle switch signal
R
T
Oil pressure switch signal
R
T
T
R
Buzzer output signal
T
R
Fuel level sensor signal
R
T
Fuel level low warning signal
R
R
T
Malfunction indicator signal
T
R
ASCD SET lamp signal
T
R
ASCD CRUISE lamp signal
T
R
Front wiper request signal
T
R
Front wiper stop position signal
R
T
Rear window defogger switch signal
T
R
Rear window defogger control signal
R
R
R
T
Hood switch signal
R
T
Theft warning horn request signal
T
R
Horn chirp signal
T
R
Steering angle sensor signal
T
R
Tire pressure signal
T
R
Tire pressure data signal
T
R
R
CVT position indicator signal
T
R
R
ABS warning lamp signal
R
T
VDC OFF indicator lamp signal
R
T
SLIP indicator lamp signal
R
T
Brake warning lamp signal
R
T
System setting signal
T
T
R
AWD warning lamp signal
R
T
AWD lock indicator lamp signal
R
T
AWD lock switch signal
T
R
Parking brake switch signal
R
T
R
Signals
ECM
TCM
Low
tire
pres-
sure
warn-
ing
con-
trol
unit
Dis-
play
unit
Dis-
play
con-
trol
unit
BCM
Uni-
fied
meter
and
A/C
amp.
Steer
ing
angle
sen-
sor
Drive
r seat
con-
trol
unit
AWD
con-
trol
unit
ABS
actu-
ator
and
elec-
tric
unit
(con-
trol
unit)
IPDM
E/R
CVT-40
CVT SYSTEM
Revision; 2004 April
2003 Murano
Input/Output Signal of TCM
ACS0020J
*1: Input by CAN communications.
*2: If these input and output signals are different, the TCM triggers the fail-safe function.
Line Pressure and Secondary Pressure Control
ACS0020K
●
When an input torque signal equivalent to the engine drive force is sent from the ECM to the TCM, the
TCM controls the line pressure solenoid valve and secondary pressure solenoid valve.
●
This line pressure solenoid controls the pressure regulator valve as the signal pressure and adjusts the
pressure of the operating oil discharged from the oil pump to the line pressure most appropriate to the
driving state. Secondary pressure is made by line pressure decreasing.
Control item
Fluid
pressure
control
Select
control
Shift con-
trol
Lock-up
control
CAN
communi-
cation
control
Fail-safe
function
(*2)
Input
PNP switch
X
X
X
X
X
X
Accelerator pedal position signal
(*1)
X
X
X
X
X
X
Closed throttle position signal
(*1)
X
X
X
X
Engine speed signal
(*1)
X
X
X
X
X
CVT fluid temperature sensor
X
X
X
X
X
Second position switch signal
(*1)
X
X
X
Stop lamp switch signal
(*1)
X
X
X
X
Primary speed sensor
X
X
X
X
X
Secondary speed sensor
X
X
X
X
X
X
Primary pressure sensor
X
X
X
Secondary pressure sensor
X
X
X
TCM power supply voltage signal
X
X
X
X
X
Out-
put
Step motor
X
X
TCC solenoid valve
X
X
X
Lock-up select solenoid valve
X
X
X
Line pressure solenoid valve
X
X
X
X
Secondary pressure solenoid valve
X
X
X
SCIA1846E
CVT SYSTEM
CVT-41
D
E
F
G
H
I
J
K
L
M
A
B
CVT
Revision; 2004 April
2003 Murano
NORMAL CONTROL
Optimize the line pressure and secondary pressure, depending on driving conditions, on the basis of the throt-
tle position, the engine speed, the primary pulley (input) revolution speed, the secondary pulley (output) revo-
lution speed, the brake signal, the PNP switch signal, the lock-up signal, the voltage, the target gear ratio, the
fluid temperature, and the fluid pressure.
FEEDBACK CONTROL
When controlling the normal fluid pressure or the selected fluid pressure, the secondary pressure can be set
more accurately by using the fluid pressure sensor to detect the secondary pressure and controlling the feed-
back.
Shift Control
ACS0020L
In order to select the gear ratio which can obtain the driving force in accordance with driver's intention and the
vehicle condition, monitor the driving conditions, such as the vehicle speed and the throttle position, select the
appropriate gear ratio, and determine how to change the gear before reaching it in the TCM. Then send the
command to the step motor, and control the flow-in/flow-out of line pressure from the primary pulley to deter-
mine the position of the moving-pulley and control the gear ratio.
NOTE:
The gear ratio is set for every position separately.
“D” POSITION
Shifting over all the ranges of gear ratios from the lowest to the high-
est.
“S”POSITION
Use this position for the improved engine braking.
SCIA1952E
SCIA1953E
CVT-42
CVT SYSTEM
Revision; 2004 April
2003 Murano
“L” POSITION
By limiting the gear range to the lowest position, the strong driving
force and the engine brake can be secured.
DOWNHILL ENGINE BRAKE CONTROL (AUTO ENGINE BRAKE CONTROL)
When downhill is detected with the accelerator pedal released, the engine brake will be strengthened up by
downshifting so as not to accelerate the vehicle more than necessary.
KICKDOWN CONTROL
During sudden deceleration, determine if it is a sudden deceleration from the throttle position to secure the
highly responsive driving force as necessary. When it is judged as sudden deceleration, speed up the shift pat-
tern faster than normal depression for a certain period of time, and slowly shift gears to get highly responsive
shift pattern.
Lock-Up and Select Control
ACS002S9
●
The torque converter clutch piston in the torque converter is engaged to eliminate torque converter slip to
increase power transmission efficiency.
●
The torque converter clutch control valve operation is controlled by the torque converter clutch solenoid
valve, which is controlled by a signal from TCM. The torque converter clutch control valve engages or
releases the torque converter clutch piston.
●
When shifting between N (P) ⇔ D (R), torque converter clutch solenoid controls engagement power of
forward clutch and reverse brake.
●
The lock-up applied gear range was expanded by locking up the
torque converter at a lower vehicle speed than conventional
CVT models.
SCIA1955E
SCIA1958E
CVT SYSTEM
CVT-43
D
E
F
G
H
I
J
K
L
M
A
B
CVT
Revision; 2004 April
2003 Murano
TORQUE CONVERTER CLUTCH AND SELECT CONTROL VALVE CONTROL
Lock-Up and Select Control System Diagram
Lock-Up Released
●
In the lock-up released state, the torque converter clutch control valve is set into the unlocked state by the
torque converter clutch solenoid and the lock-up apply pressure is drained.
In this way, the torque converter clutch piston is not coupled.
Lock-Up Applied
●
In the lock-up applied state, the torque converter clutch control valve is set into the locked state by the
torque converter clutch solenoid and lock-up apply pressure is generated.
In this way, the torque converter clutch piston is pressed and coupled.
Select Control
●
When shifting between N (P)
⇔
D (R), optimize the operating pressure on the basis of the throttle position,
the engine speed, and the secondary pulley (output) revolution speed to lessen the shift shock.
●
Switch lock-up control or select control with torque converter clutch solenoid valve to switching select
valve switch with lock-up select solenoid valve.
SCIA2374E
CVT-44
CVT SYSTEM
Revision; 2004 April
2003 Murano
Control Valve
ACS002S8
FUNCTION OF CONTROL VALVE
Name
Function
Torque converter regulator valve
Optimize the supply pressure for the torque converter depending on driving conditions.
Pressure regulator valve
Optimize the discharge pressure from the oil pump depending on driving conditions.
TCC control valve
●
Activate or deactivate the lock-up.
●
Lock-up smoothly by opening lock-up operation excessively.
TCC solenoid valve
Controls the TCC control valve or select control valve.
Shift control valve
Controls flow-in/out of line pressure from the primary pulley depending on the stroke dif-
ference between the stepping motor and the primary pulley.
Secondary valve
Controls the line pressure from the secondary pulley depending on operating condi-
tions.
Clutch regulator valve
Adjust the clutch operating pressure depending on operating conditions.
Secondary pressure solenoid valve
Controls the secondary valve.
Line pressure solenoid valve
Controls the line pressure control valve.
Step motor
Controls the pulley ratio.
Manual valve
Transmit the clutch operating pressure to each circuit in accordance with the selected
position.
Select control valve
Engage forward clutch, reverse brake smoothly depending on select operation.
Select switch valve
Switch torque converter clutch solenoid valve control pressure use to torque converter
clutch control valve or select control valve.
Lock-up select solenoid valve
Controls the select switch valve.
ON BOARD DIAGNOSTIC (OBD) SYSTEM
CVT-45
D
E
F
G
H
I
J
K
L
M
A
B
CVT
Revision; 2004 April
2003 Murano
ON BOARD DIAGNOSTIC (OBD) SYSTEM
PFP:00028
Introduction
ACS001SS
The CVT system has two self-diagnostic systems.
The first is the emission-related on board diagnostic system (OBD-II) performed by the TCM in combination
with the ECM. The malfunction is indicated by the MIL (malfunction indicator lamp) and is stored as a DTC in
the ECM memory, and the TCM memory.
The second is the TCM original self-diagnosis performed by the TCM. The malfunction is stored in the TCM
memory. The detected items are overlapped with OBD-II self-diagnostic items. For detail, refer to
"Self-Diagnostic Result Test Mode"
OBD-II Function for CVT System
ACS001ST
The ECM provides emission-related on board diagnostic (OBD-II) functions for the CVT system. One function
is to receive a signal from the TCM used with OBD-related parts of the CVT system. The signal is sent to the
ECM when a malfunction occurs in the corresponding OBD-related part. The other function is to indicate a
diagnostic result by means of the MIL (malfunction indicator lamp) on the instrument panel. Sensors, switches
and solenoid valves are used as sensing elements.
The MIL automatically illuminates in One or Two Trip Detection Logic when a malfunction is sensed in relation
to CVT system parts.
One or Two Trip Detection Logic of OBD-II
ACS001SU
ONE TRIP DETECTION LOGIC
If a malfunction is sensed during the first test drive, the MIL will illuminate and the malfunction will be stored in
the ECM memory as a DTC. The TCM is not provided with such a memory function.
TWO TRIP DETECTION LOGIC
When a malfunction is sensed during the first test drive, it is stored in the ECM memory as a 1st trip DTC
(diagnostic trouble code) or 1st trip freeze frame data. At this point, the MIL will not illuminate. — First Trip
If the same malfunction as that experienced during the first test drive is sensed during the second test drive,
the MIL will illuminate. — Second Trip
The “trip” in the “One or Two Trip Detection Logic” means a driving mode in which self-diagnosis is performed
during vehicle operation.
OBD-II Diagnostic Trouble Code (DTC)
ACS001SV
HOW TO READ DTC AND 1ST TRIP DTC
DTC and 1st trip DTC can be read by the following methods.
(
with CONSULT-II or
GST) CONSULT-II or GST (Generic Scan Tool) Examples: P0705, P0720 etc.
These DTC are prescribed by SAE J2012.
(CONSULT-II also displays the malfunctioning component or system.)
●
1st trip DTC No. is the same as DTC No.
●
Output of the diagnostic trouble code indicates that the indicated circuit has a malfunction. How-
ever, in case of the Mode II and GST, they do not indicate whether the malfunction is still occurring
or occurred in the past and returned to normal.
CONSULT-II can identify them as shown below, therefore, CONSULT-II (if available) is recom-
mended.
A sample of CONSULT-II display for DTC and 1st trip DTC is shown
on the next page. DTC or 1st trip DTC of a malfunction is displayed
in SELF-DIAGNOSTIC RESULTS mode for “ENGINE” with CON-
SULT-II. Time data indicates how many times the vehicle was driven
after the last detection of a DTC.
SCIA2272E
CVT-46
ON BOARD DIAGNOSTIC (OBD) SYSTEM
Revision; 2004 April
2003 Murano
If the DTC is being detected currently, the time data will be “0”.
If a 1st trip DTC is stored in the ECM, the time data will be “1t”.
Freeze Frame Data and 1st Trip Freeze Frame Data
The ECM has a memory function, which stores the driving condition such as fuel system status, calculated
load value, engine coolant temperature, short term fuel trim, long term fuel trim, engine speed and vehicle
speed at the moment the ECM detects a malfunction.
Data which are stored in the ECM memory, along with the 1st trip DTC, are called 1st trip freeze frame data,
and the data, stored together with the DTC data, are called freeze frame data and displayed on CONSULT-II
or GST. The 1st trip freeze frame data can only be displayed on the CONSULT-II screen, not on the GST. For
details, refer to
.
Only one set of freeze frame data (either 1st trip freeze frame data or freeze frame data) can be stored in the
ECM. 1st trip freeze frame data is stored in the ECM memory along with the 1st trip DTC. There is no priority
for 1st trip freeze frame data, and it is updated each time a different 1st trip DTC is detected. However, once
freeze frame data (2nd trip detection/MIL on) is stored in the ECM memory, 1st trip freeze frame data is no
longer stored. Remember, only one set of freeze frame data can be stored in the ECM. The ECM has the fol-
lowing priorities to update the data.
Both 1st trip freeze frame data and freeze frame data (along with the DTC) are cleared when the ECM mem-
ory is erased.
HOW TO ERASE DTC
The diagnostic trouble code can be erased by CONSULT-II, GST or ECM DIAGNOSTIC TEST MODE as
described following.
●
If the battery cable is disconnected, the diagnostic trouble code will be lost within 24 hours.
●
When you erase the DTC, using CONSULT-II or GST is easier and quicker than switching the mode
selector on the ECM.
The following emission-related diagnostic information is cleared from the ECM memory when erasing DTC
related to OBD-II. For details, refer to
EC-69, "Emission-related Diagnostic Information"
●
Diagnostic trouble codes (DTC)
●
1st trip diagnostic trouble codes (1st trip DTC)
●
Freeze frame data
SAT015K
SAT016K
Priority
Items
1
Freeze frame data
Misfire — DTC: P0300 - P0306
Fuel Injection System Function — DTC: P0171, P0172, P0174, P0175
2
Except the above items (Includes CVT related items)
3
1st trip freeze frame data
ON BOARD DIAGNOSTIC (OBD) SYSTEM
CVT-47
D
E
F
G
H
I
J
K
L
M
A
B
CVT
Revision; 2004 April
2003 Murano
●
1st trip freeze frame data
●
System readiness test (SRT) codes
●
Test values
HOW TO ERASE DTC (WITH CONSULT-II)
●
If a DTC is displayed for both ECM and TCM, it is necessary to be erased for both ECM and TCM.
1.
If the ignition switch stays “ON” after repair work, be sure to turn ignition switch “OFF” once. Wait at least
10 seconds and then turn it “ON” (engine stopped) again.
2.
Turn CONSULT-II “ON” and touch “TRANSMISSION”.
3.
Touch “SELF-DIAG RESULTS”.
4.
Touch “ERASE”. (The DTC in the TCM will be erased.) Then touch “BACK” twice.
5.
Touch “ENGINE”.
6.
Touch “SELF-DIAG RESULTS”.
7.
Touch “ERASE”. (The DTC in the ECM will be erased.)
HOW TO ERASE DTC (WITH GST)
1.
If the ignition switch stays “ON” after repair work, be sure to turn ignition switch “OFF” once. Wait at least
10 seconds and then turn it “ON” (engine stopped) again.
2.
Select Mode 4 with Generic Scan Tool (GST). For details, refer to
EC-138, "Generic Scan Tool (GST)
SCIA5768E
CVT-48
ON BOARD DIAGNOSTIC (OBD) SYSTEM
Revision; 2004 April
2003 Murano
Malfunction Indicator Lamp (MIL)
ACS001SW
DESCRIPTION
The MIL is located on the instrument panel.
1.
The MIL will light up when the ignition switch is turned “ON” with-
out the engine running. This is a bulb check.
●
If the MIL does not light up, refer to
,
or see
EC-650, "MIL AND DATA LINK CONNECTOR"
.
2.
When the engine is started, the MIL should go off.
If the MIL remains on, the on board diagnostic system has
detected an engine system malfunction.
SEF217U
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст