Nissan Versa Sedan. Manual — part 793
TM-78
< SYSTEM DESCRIPTION >
[4AT: RE4F03C]
STRUCTURE AND OPERATION
• The drive force from the input shaft is transmitted by forward rotation of the engaged reverse clutch to the
front sun gear. Engagement of the low & reverse brake fastens the front carrier in place, causing the front
internal gear to turn in reverse and transmitting force by reverse rotation to the output gear.
• The status of each planetary gear is as shown below.
Front planetary gear
Rear planetary gear
TRANSAXLE : Component Description
INFOID:0000000009267842
JSDIA1999GB
Name
Front sun gear
Front carrier
Front internal gear
Condition
Input
Fixed
Output
Rotating direction
Forward
Stopped
Reverse
Speed
Same speed as input shaft
—
Slower than input shaft
Name
Rear sun gear
Rear carrier
Rear internal gear
Condition
—
Fixed
Fixed
Rotating direction
Reverse
Reverse
Stopped
Speed
Faster than input shaft
Slower than input shaft
—
Name (abbreviation)
FUNCTION
Torque converter
Amplifies the drive force from the engine and transmits it to the transmission input shaft.
Oil pump
Driven by the engine, this component supplies oil to the torque converter, control valve assembly,
and lubricated parts.
4-point gear
Transmits drive force from the transmission mechanism to the output gear, idler gear, reduction
gear, and final gear.
Low clutch (L/C)
Connects the rear sun gear and input shaft
High clutch (H/C)
Connects the front carrier and input shaft
Reverse clutch (R/C)
Connects the front sun gear and input shaft
Low & reverse brake (L&R/B)
Fastens the rear internal gear and front carrier in place.
2-4 brake (2-4/B)
Brake band that fastens the front sun gear in place.
STRUCTURE AND OPERATION
TM-79
< SYSTEM DESCRIPTION >
[4AT: RE4F03C]
C
E
F
G
H
I
J
K
L
M
A
B
TM
N
O
P
SHIFT LOCK SYSTEM
SHIFT LOCK SYSTEM : System Description
INFOID:0000000009267855
The selector lever cannot be shifted from “P” position to any other position unless the ignition switch is in the
ON position and the brake pedal is depressed.
KEY LOCK SYSTEM
KEY LOCK SYSTEM : System Description
INFOID:0000000009267856
• The key lock mechanism also operates as a shift lock:
With the ignition switch turned to ON, selector lever cannot be shifted from “P” position to any other position
unless brake pedal is depressed.
With the key removed, selector lever cannot be shifted from “P” position to any other position.
The key cannot be removed unless selector lever is placed in “P” position.
• The shift lock and key lock mechanisms are controlled by the ON-OFF operation of the shift lock solenoid
and by the operation of the rotator and slider located inside key cylinder, respectively.
One-way clutch (OWC)
This clutch prevents reverse turning of the front carrier and rear internal gear. It operates not hy-
draulically but mechanically.
Planetary gear
Transmits drive force to various positions by engagement and release of the clutches and bands.
Name (abbreviation)
FUNCTION
TM-80
< SYSTEM DESCRIPTION >
[4AT: RE4F03C]
SYSTEM
SYSTEM
A/T CONTROL SYSTEM
A/T CONTROL SYSTEM : System Diagram
INFOID:0000000009267843
A/T CONTROL SYSTEM : System Description
INFOID:0000000009267844
SYSTEM DESCRIPTION
• The A/T senses vehicle operating conditions through various sensors or signals. It always controls the opti-
mum shift position and reduces shifting and lock-up shocks.
• Receives input signals transmitted from various switches and sensors.
• Determines required line pressure, shifting point, lock-up operation, etc.
• Transmits required output signals to the respective solenoids.
INPUT/OUTPUT SIGNAL CHART
INPUT/OUTPUT SIGNAL OF TCM
JSDIA2058GB
Sensor (or signal)
⇒
TCM function
⇒
Actuator
Engine speed signal
Engine torque signal
Accelerator pedal position signal
Closed throttle position signal
Stop lamp switch signal
Transmission range switch
O/D switch signal
A/T fluid temperature sensor
Input speed sensor
Output speed sensor
Vehicle speed signal
Line pressure control (
Shift change control (
)
Shift pattern control (
)
Lock-up control (
)
Fail-safe control (
Self-diagnosis (
)
CONSULT communication line (
)
CAN communication line (
Line pressure solenoid valve
Torque converter clutch solenoid valve
Low clutch solenoid valve
2-4 brake solenoid valve
High clutch/low & reverse brake solenoid
valve
Select switch ON-OFF solenoid valve
Shift position indicator
O/D OFF indicator lamp
SYSTEM
TM-81
< SYSTEM DESCRIPTION >
[4AT: RE4F03C]
C
E
F
G
H
I
J
K
L
M
A
B
TM
N
O
P
*: If these input and output signals are different, the TCM triggers the fail-safe function.
A/T CONTROL SYSTEM : Fail-Safe
INFOID:0000000009267845
TCM is equipped with an electrical fail-safe mode. The operation can be continued even if the signal circuit of
the main electronically controlled input/output parts are damaged.
If the vehicle shows following behaviors including “poor acceleration”, a malfunction of the applicable system
is detected by TCM and the vehicle may be in a fail-safe mode. At this time, check the DTC code and perform
inspection and repair according to the malfunction diagnosis procedures.
FAIL-SAFE FUNCTION
Control item
Line
pressure
control
Shift change
control
Shift pattern
control
Lock-up con-
trol
Fail-safe func-
tion
*
Input
Engine speed signal
(CAN communication line)
X
X
X
X
X
Engine torque signal
(CAN communication line)
X
X
Accelerator pedal position signal
(CAN communication line)
X
X
X
X
X
Closed throttle position signal
(CAN communication line)
X
X
X
X
Stop lamp switch signal
(CAN communication line)
X
X
X
X
Transmission range switch
X
X
X
X
X
O/D switch signal
(CAN communication line)
X
A/T fluid temperature sensor
X
X
X
X
X
Input speed sensor
X
X
X
X
Output pressure sensor
X
X
X
X
X
Output
Line pressure solenoid valve
X
X
X
Torque converter clutch solenoid
valve
X
X
X
Low clutch solenoid valve
X
X
2-4 brake solenoid valve
X
X
High clutch/low & reverse brake sole-
noid valve
X
X
Select switch ON-OFF solenoid valve
X
X
Shift position indicator
(CAN communication line)
X
O/D OFF indicator lamp
(CAN communication line)
X
DTC
Vehicle behavior
Vehicle condition
P0705
P0706
• “D” position (The shifting can be performed)
• “R” position can be performed
• Back-up lamp is OFF
• Large shift shock
• Lock-up is prohibited
• Slip lock-up is prohibited
—
P0713
The gear is fixed in a position of error detection
During driving
Locks in 3GR
Other than the above
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст