2003 NISSAN ALMERA N16 clutch

AT-20
OVERALL SYSTEM
POWER TRANSMISSION
“N” and “P” Positions
●“N” position
Power from the input shaft is not transmitted to the output shaft because the clutches do not operate.
●“P” position
Similar to the “N” position, the clutches do not operate. The parking pawl engages with the parking gear to
mechanically hold the output shaft so that the power train is locked.
SAT991I

OVERALL SYSTEM
AT-21
D
E
F
G
H
I
J
K
L
MA
B
AT
“11 ” Position
●Forward clutch
●Forward one-way clutch
●Overrun clutch
●Low and reverse brakeAs overrun clutch engages, rear internal gear is locked by the operation of low &
reverse brake.
This is different from that of D
1 and 21 .
Engine brake Overrun clutch always engages, therefore engine brake can be obtained when deceler-
ating.
SAT374J

AT-22
OVERALL SYSTEM
“D1 ” and “21 ” Positions
●Forward one-way clutch
●Forward clutch
●Low one-way clutchRear internal gear is locked to rotate counterclockwise because of the functioning of
these three clutches.
Overrun clutch
engagement conditions
(Engine brake)D
1 : Overdrive control switch “OFF” and throttle opening is less than 3/16
2
1 : Operates when throttle opening is less than 3/16, but does not affect engine brake.
At D
1 and 21 positions, engine brake is not activated due to free turning of low one-
way clutch.
SAT377J

OVERALL SYSTEM
AT-23
D
E
F
G
H
I
J
K
L
MA
B
AT
“D2 ”, “22 ” and “12 ” Positions
●Forward clutch
●Forward one-way
clutch
●Brake bandRear sun gear drives rear planetary carrier and combined front internal gear. Front internal gear now
rotates around front sun gear accompanying front planetary carrier.
As front planetary carrier transfers the power to rear internal gear through forward clutch and forward one-
way clutch, this rotation of rear internal gear increases the speed of rear planetary carrier compared with
that of the 1st speed.
Overrun clutch
engagement conditionsD
2 : Overdrive control switch “OFF” and throttle opening is less than 3/16
2
2: Operates when throttle opening is less than 3/16, but does not affect engine brake.
1
2 : Always engaged
SAT378J

AT-24
OVERALL SYSTEM
“D3 ” Position
●High clutch
●Forward clutch
●Forward one-way
clutchInput power is transmitted to front planetary carrier through high clutch. And front planetary carrier is con-
nected to rear internal gear by operation of forward clutch and forward one-way clutch.
This rear internal gear rotation and another input (the rear sun gear) accompany rear planetary carrier to
turn at the same speed.
Overrun clutch
engagement conditionsD
3 : Overdrive control switch “OFF” and throttle opening is less than 3/16
SAT379J

OVERALL SYSTEM
AT-25
D
E
F
G
H
I
J
K
L
MA
B
AT
“D4 ” (OD) Position
●High clutch
●Brake band
●Forward clutch (Does not affect power
transmission)Input power is transmitted to front planetary carrier through high clutch.
This front planetary carrier turns around the front sun gear which is fixed by brake
band and makes front internal gear (output) turn faster.
Engine brakeAt D
4 position, there is no one-way clutch in the power transmission line and engine
brake can be obtained when decelerating.
SAT380J

AT-26
OVERALL SYSTEM
“R” Position
●Reverse clutch
●Low and reverse brakeFront planetary carrier is stationary because of the operation of low & reverse brake.
Input power is transmitted to front sun gear through reverse clutch, which drives front
internal gear in the opposite direction.
Engine brakeAs there is no one-way clutch in the power transmission line, engine brake can be
obtained when decelerating.
SAT381J

OVERALL SYSTEM
AT-27
D
E
F
G
H
I
J
K
L
MA
B
AT
Control SystemECS007NJ
OUTLINE
The automatic transaxle senses vehicle operating conditions through various switches and sensors. It always
controls the optimum shift position and reduces shifting and lock-up shocks.
*: This sensor means Accelerator pedal position (APP) sensor.
CONTROL SYSTEM
SWITCHES & SENSORS TCM ACTUATORS
PNP switch
Throttle position sensor*
Engine speed signal
A/T fluid temperature sensor
Revolution sensor
Vehicle speed sensor
Overdrive control switch
Stop lamp switchShift control
Line pressure control
Lock-up control
Overrun clutch control
Timing control
Fail-safe control
Self-diagnosis
CONSULT-II communication line
controlShift solenoid valve A
Shift solenoid valve B
Overrun clutch solenoid valve
Torque converter clutch solenoid
valve
Line pressure solenoid valve
O/D OFF indicator lamp
SCIA0690E