0-19
CIRCUIT
REXTON 2007.09
3110-01
C. REVERSE/PARKING (R/P) LOCK SYSTEM
Reverse (R) lock system is a safety system that prevents the selector lever from shifting to “P”
or “R” position by activating the solenoid valve when the selector lever unit determines
that the vehicle speed exceeds 10 km/h by checking the speed signal from wheel speed senso
via CAN communication. Parking (P) lock system uses the signals from brake switch other than
conventional cable system to shift to other positions. The wiring harness for detecting brake
switch operation is connected to selector lever control unit.
D. STARTER LOCK-OUT CONTACT SWITC
The starter lock-out contact is installed beside oil temperature sensor and is actuated by a cam
rail, which is located on the latching plate. In the selector lever positions “P” and “N”, the
permanent magnet is moved away from the reed contact. This opens the reed contact and the
transmission control module receives an electrical signal. The transmission control module
activates the starter lock-out relay module. This closes the electrical circuit to the starter in
selector lever positions “P” and “N” via the starter lock-out relay module. In other words,
when the selector lever is in driving positions, the contact is closed and the starter cannot be
operated.
E. OIL TEMPERATURE SENSOR
The oil temperature sensor is installed in hydraulic control unit and is connected in series with
the starter lock-out contact. This means that the temperature signal is transferred to TCU when
the starter lock-out contact is closed. The oil temperature has a considerable effect on the
shifting time and therefore the shift quality. By measuring the oil temperature, shift operations
can be optimized in all temperature ranges.
Gear N2 N3
1 ● -
2 ●●
3 ●●
4 ●●
5 ● -
R (S mode) ● -
R (W mode) ●●
The speed sensors are fixed to the shell of the
hydraulic control unit via the contact tabs. A lea
spring, which rests against the valve body,
presses the speed sensors against the
transmission housing. This ensures a precise
distance between speed sensors and impulse
rings. speed sensor (n3) detects the speed o
the front sun gear and speed sensor (n2)
detects the speed of the front planetary carrier.
If the speed sensor is defective, the
transmission is operated in emergency driving
mode. Below table shows the detection of speed
sensor.
F. SPEED SENSOR
G. LOCKUP SOLENOID VALVE
This valve activates and releases the lockup
clutch by adjusting the current to solenoid valve
according to engine throttle opening value and
output shaft speed. The lockup clutch operates
in 3rd, 4th and 5th gear with steps to reduce
shift shocks.
Working Current 1.5 ~ 2.0 A
Operating distance 0.2 mm
Resistance 2.5 ± 0.2 Ω
(25°C)
Operating range 3, 4, 5 shift
H. MODULATING PRESSURE (MP) AND SHIFT
PRESSURE (SP) CONTROL SOLENOID
VALVE
These valves control the modulating pressure
and the shift pressure by applying appropriate
electric current to solenoid valves according to
driving condition of engine and transmission.
When the electric current from TCU is high/low,
the regulated pressure decreases/increases.
I.
The solenoid valve remains energized and
therefore open until the shift process is
completed according to the engine and
transmission conditions. If a solenoid valve is
energized, it opens and transmits shift valve
pressure to the corresponding command valve.
CHARACTERISTICS OF UP/DOWNSHIFT
OLENOID VALVE
Working Curren 0 ~ 1.0 A
Operating distance 0.6 mm
Resistance 5 ± 0.2 Ω (25°C)
Working Curren 1.5 ~ 2.0 A
Operating distance 0.2 mm
Resistance 3.8 ± 0.2 Ω
(25°C)
To Next Page
Loading...
Need help?
General
